./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/divmul_buf_diverge.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_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/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_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/divmul_buf_diverge.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/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_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/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 8967c0a6dd6f26859048ef07f7346401bdb19327ee452e685df9b5c4b7492d34 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:44:55,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:44:55,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:44:55,997 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:44:55,998 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:44:56,000 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:44:56,002 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:44:56,005 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:44:56,008 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:44:56,009 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:44:56,011 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:44:56,013 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:44:56,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:44:56,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:44:56,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:44:56,020 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:44:56,021 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:44:56,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:44:56,026 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:44:56,029 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:44:56,032 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:44:56,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:44:56,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:44:56,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:44:56,042 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:44:56,043 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:44:56,044 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:44:56,045 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:44:56,046 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:44:56,048 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:44:56,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:44:56,055 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:44:56,056 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:44:56,057 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:44:56,061 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:44:56,063 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:44:56,064 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:44:56,065 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:44:56,065 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:44:56,066 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:44:56,067 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:44:56,068 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 03:44:56,127 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:44:56,130 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:44:56,133 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:44:56,133 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:44:56,133 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:44:56,134 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:44:56,134 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 03:44:56,134 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:44:56,142 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:44:56,143 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 03:44:56,144 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 03:44:56,145 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:44:56,145 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 03:44:56,145 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 03:44:56,146 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 03:44:56,147 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:44:56,147 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:44:56,148 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 03:44:56,148 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:44:56,148 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:44:56,148 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 03:44:56,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:44:56,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 03:44:56,149 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:44:56,149 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:44:56,150 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 03:44:56,150 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:44:56,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 03:44:56,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:44:56,153 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:44:56,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:44:56,154 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:44:56,155 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:44:56,155 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 03:44:56,155 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 03:44:56,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 03:44:56,156 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 03:44:56,156 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:44:56,156 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:44:56,157 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_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8967c0a6dd6f26859048ef07f7346401bdb19327ee452e685df9b5c4b7492d34 [2021-11-03 03:44:56,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:44:56,553 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:44:56,556 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:44:56,557 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:44:56,558 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:44:56,560 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/float-benchs/divmul_buf_diverge.c [2021-11-03 03:44:56,651 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/data/d57c88d20/0858da5903c44af0beea99946f2e3b73/FLAGf56c17d82 [2021-11-03 03:44:57,208 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:44:57,211 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/sv-benchmarks/c/float-benchs/divmul_buf_diverge.c [2021-11-03 03:44:57,225 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/data/d57c88d20/0858da5903c44af0beea99946f2e3b73/FLAGf56c17d82 [2021-11-03 03:44:57,542 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/data/d57c88d20/0858da5903c44af0beea99946f2e3b73 [2021-11-03 03:44:57,544 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:44:57,546 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:44:57,557 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:44:57,558 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:44:57,563 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:44:57,564 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:44:57" (1/1) ... [2021-11-03 03:44:57,567 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67d0723a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:57, skipping insertion in model container [2021-11-03 03:44:57,567 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:44:57" (1/1) ... [2021-11-03 03:44:57,577 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:44:57,598 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:44:57,885 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_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/sv-benchmarks/c/float-benchs/divmul_buf_diverge.c[617,630] [2021-11-03 03:44:57,916 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:44:57,940 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 03:44:57,958 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_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/sv-benchmarks/c/float-benchs/divmul_buf_diverge.c[617,630] [2021-11-03 03:44:57,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:44:57,992 INFO L208 MainTranslator]: Completed translation [2021-11-03 03:44:57,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:57 WrapperNode [2021-11-03 03:44:57,993 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:44:57,994 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 03:44:57,995 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 03:44:57,995 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 03:44:58,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:57" (1/1) ... [2021-11-03 03:44:58,015 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:57" (1/1) ... [2021-11-03 03:44:58,043 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 03:44:58,045 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 03:44:58,045 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 03:44:58,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 03:44:58,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:57" (1/1) ... [2021-11-03 03:44:58,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:57" (1/1) ... [2021-11-03 03:44:58,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:57" (1/1) ... [2021-11-03 03:44:58,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:57" (1/1) ... [2021-11-03 03:44:58,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:57" (1/1) ... [2021-11-03 03:44:58,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:57" (1/1) ... [2021-11-03 03:44:58,074 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:57" (1/1) ... [2021-11-03 03:44:58,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 03:44:58,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 03:44:58,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 03:44:58,079 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 03:44:58,089 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:57" (1/1) ... [2021-11-03 03:44:58,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:44:58,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:44:58,124 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 03:44:58,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 03:44:58,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 03:44:58,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 03:44:58,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 03:44:58,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 03:44:58,528 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 03:44:58,529 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-03 03:44:58,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:44:58 BoogieIcfgContainer [2021-11-03 03:44:58,532 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 03:44:58,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 03:44:58,534 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 03:44:58,539 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 03:44:58,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:44:57" (1/3) ... [2021-11-03 03:44:58,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@355de14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:44:58, skipping insertion in model container [2021-11-03 03:44:58,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:57" (2/3) ... [2021-11-03 03:44:58,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@355de14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:44:58, skipping insertion in model container [2021-11-03 03:44:58,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:44:58" (3/3) ... [2021-11-03 03:44:58,544 INFO L111 eAbstractionObserver]: Analyzing ICFG divmul_buf_diverge.c [2021-11-03 03:44:58,551 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 03:44:58,551 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 03:44:58,617 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 03:44:58,640 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 03:44:58,640 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 03:44:58,672 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 03:44:58,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-03 03:44:58,678 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:44:58,679 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-03 03:44:58,679 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:44:58,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:44:58,686 INFO L85 PathProgramCache]: Analyzing trace with hash 2373799, now seen corresponding path program 1 times [2021-11-03 03:44:58,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:44:58,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603692093] [2021-11-03 03:44:58,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:44:58,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:44:58,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:44:58,908 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 03:44:58,908 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:44:58,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603692093] [2021-11-03 03:44:58,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603692093] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:44:58,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:44:58,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 03:44:58,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537339277] [2021-11-03 03:44:58,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:44:58,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:44:58,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:44:58,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:44:58,941 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 03:44:58,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:44:58,967 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-11-03 03:44:58,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:44:58,970 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 03:44:58,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:44:58,979 INFO L225 Difference]: With dead ends: 13 [2021-11-03 03:44:58,980 INFO L226 Difference]: Without dead ends: 6 [2021-11-03 03:44:58,983 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 03:44:59,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-11-03 03:44:59,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-11-03 03:44:59,018 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 03:44:59,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-11-03 03:44:59,021 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-11-03 03:44:59,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:44:59,022 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-11-03 03:44:59,022 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 03:44:59,023 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-11-03 03:44:59,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 03:44:59,023 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:44:59,023 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 03:44:59,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 03:44:59,024 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:44:59,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:44:59,026 INFO L85 PathProgramCache]: Analyzing trace with hash 73782826, now seen corresponding path program 1 times [2021-11-03 03:44:59,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:44:59,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525069014] [2021-11-03 03:44:59,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:44:59,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:44:59,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:44:59,127 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 03:44:59,128 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:44:59,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525069014] [2021-11-03 03:44:59,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525069014] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 03:44:59,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886730249] [2021-11-03 03:44:59,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:44:59,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:44:59,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:44:59,137 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:44:59,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 03:44:59,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:44:59,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:44:59,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:44:59,286 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 03:44:59,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:44:59,335 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 03:44:59,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886730249] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:44:59,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [130896811] [2021-11-03 03:44:59,372 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-03 03:44:59,373 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 03:44:59,379 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 03:44:59,385 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 03:44:59,386 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 03:44:59,432 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:44:59,446 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:44:59,449 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:44:59,452 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 03:44:59,454 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:44:59,454 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:44:59,455 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 03:44:59,466 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-11-03 03:44:59,494 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 21=[|v_#valid_10|]} [2021-11-03 03:44:59,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:44:59,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:44:59,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:44:59,542 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 03:44:59,544 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:44:59,550 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 03:44:59,556 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:44:59,557 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 03:44:59,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 03:44:59,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:44:59,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:44:59,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:44:59,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:44:59,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:44:59,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:44:59,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:44:59,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:44:59,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:44:59,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:44:59,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:44:59,700 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 03:44:59,701 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:44:59,706 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 03:44:59,707 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:44:59,708 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 03:44:59,708 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 03:44:59,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:44:59,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:44:59,745 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:44:59,750 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-03 03:44:59,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 03:44:59,752 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:119, output treesize:94 [2021-11-03 03:44:59,781 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.2 percent of original size [2021-11-03 03:44:59,800 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:44:59,807 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:44:59,832 INFO L185 QuantifierPusher]: treesize reduction 4, result has 82.6 percent of original size 19 [2021-11-03 03:44:59,844 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:44:59,846 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:44:59,858 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 03:44:59,868 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-03 03:44:59,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:44:59,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:44:59,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:00,017 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:00,031 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:00,033 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:00,045 INFO L185 QuantifierPusher]: treesize reduction 4, result has 82.6 percent of original size 19 [2021-11-03 03:45:00,051 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:00,053 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:00,058 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 03:45:00,064 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 242 [2021-11-03 03:45:00,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:00,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:00,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:00,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:00,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:00,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:00,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:00,196 INFO L180 QuantifierPusher]: treesize reduction 30, result has 77.3 percent of original size [2021-11-03 03:45:00,204 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:00,207 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:00,222 INFO L185 QuantifierPusher]: treesize reduction 4, result has 82.6 percent of original size 19 [2021-11-03 03:45:00,232 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:00,237 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:00,242 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 03:45:00,244 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-03 03:45:00,255 INFO L180 QuantifierPusher]: treesize reduction 34, result has 60.0 percent of original size [2021-11-03 03:45:00,264 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-03 03:45:00,272 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 03:45:00,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 03:45:00,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 03:45:00,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-03 03:45:00,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175829925] [2021-11-03 03:45:00,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 03:45:00,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:45:00,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 03:45:00,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-03 03:45:00,491 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 03:45:00,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:45:00,516 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2021-11-03 03:45:00,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 03:45:00,517 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 03:45:00,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:45:00,518 INFO L225 Difference]: With dead ends: 12 [2021-11-03 03:45:00,518 INFO L226 Difference]: Without dead ends: 9 [2021-11-03 03:45:00,519 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 03:45:00,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-03 03:45:00,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-03 03:45:00,522 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 03:45:00,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-03 03:45:00,523 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-11-03 03:45:00,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:45:00,524 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-03 03:45:00,524 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 03:45:00,524 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-03 03:45:00,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 03:45:00,525 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:45:00,526 INFO L513 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2021-11-03 03:45:00,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-03 03:45:00,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:45:00,741 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:45:00,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:45:00,742 INFO L85 PathProgramCache]: Analyzing trace with hash -765394585, now seen corresponding path program 2 times [2021-11-03 03:45:00,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:45:00,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056581732] [2021-11-03 03:45:00,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:45:00,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:45:00,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:00,861 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 03:45:00,861 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:45:00,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056581732] [2021-11-03 03:45:00,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056581732] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 03:45:00,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148172319] [2021-11-03 03:45:00,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 03:45:00,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:45:00,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:45:00,864 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:45:00,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-03 03:45:00,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-03 03:45:00,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:45:00,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 03:45:00,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:45:00,980 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 03:45:00,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:45:01,070 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 03:45:01,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148172319] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:45:01,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [950620543] [2021-11-03 03:45:01,074 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-03 03:45:01,074 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 03:45:01,075 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 03:45:01,075 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 03:45:01,075 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 03:45:01,082 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:01,084 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:01,085 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:01,086 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 03:45:01,087 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:01,088 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:01,089 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 03:45:01,092 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-11-03 03:45:01,097 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 21=[|v_#valid_11|]} [2021-11-03 03:45:01,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:01,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:01,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:01,111 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 03:45:01,112 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:01,113 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 03:45:01,114 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:01,115 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 03:45:01,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 03:45:01,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:01,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:01,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:01,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:01,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:01,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:01,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:01,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:01,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:01,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:01,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:01,148 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 03:45:01,149 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:01,152 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 03:45:01,153 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:01,154 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 03:45:01,155 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 03:45:01,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:01,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:01,163 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:01,166 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-03 03:45:01,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 03:45:01,167 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:119, output treesize:94 [2021-11-03 03:45:01,182 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.2 percent of original size [2021-11-03 03:45:01,197 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:01,201 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:01,213 INFO L185 QuantifierPusher]: treesize reduction 4, result has 82.6 percent of original size 19 [2021-11-03 03:45:01,227 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:01,229 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:01,235 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 03:45:01,238 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-03 03:45:01,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:01,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:01,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:01,331 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:01,351 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:01,353 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:01,368 INFO L185 QuantifierPusher]: treesize reduction 4, result has 82.6 percent of original size 19 [2021-11-03 03:45:01,373 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:01,378 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:01,382 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 03:45:01,387 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 242 [2021-11-03 03:45:01,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:01,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:01,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:01,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:01,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:01,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:01,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:01,457 INFO L180 QuantifierPusher]: treesize reduction 30, result has 77.3 percent of original size [2021-11-03 03:45:01,461 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:01,464 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:01,473 INFO L185 QuantifierPusher]: treesize reduction 4, result has 82.6 percent of original size 19 [2021-11-03 03:45:01,476 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:01,478 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:01,481 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 03:45:01,483 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-03 03:45:01,491 INFO L180 QuantifierPusher]: treesize reduction 34, result has 60.0 percent of original size [2021-11-03 03:45:01,496 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-03 03:45:01,500 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 03:45:01,683 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 03:45:01,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 03:45:01,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-11-03 03:45:01,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032009874] [2021-11-03 03:45:01,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-03 03:45:01,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:45:01,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-03 03:45:01,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-11-03 03:45:01,687 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:01,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:45:01,719 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-11-03 03:45:01,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 03:45:01,729 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-03 03:45:01,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:45:01,730 INFO L225 Difference]: With dead ends: 18 [2021-11-03 03:45:01,730 INFO L226 Difference]: Without dead ends: 15 [2021-11-03 03:45:01,731 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-11-03 03:45:01,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-03 03:45:01,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-03 03:45:01,735 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 03:45:01,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-11-03 03:45:01,736 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2021-11-03 03:45:01,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:45:01,737 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-11-03 03:45:01,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:01,737 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-11-03 03:45:01,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-03 03:45:01,738 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:45:01,738 INFO L513 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2021-11-03 03:45:01,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-03 03:45:01,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:45:01,965 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:45:01,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:45:01,966 INFO L85 PathProgramCache]: Analyzing trace with hash 2126035591, now seen corresponding path program 3 times [2021-11-03 03:45:01,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:45:01,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900598257] [2021-11-03 03:45:01,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:45:01,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:45:02,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:02,261 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 03:45:02,261 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:45:02,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900598257] [2021-11-03 03:45:02,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900598257] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 03:45:02,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608188605] [2021-11-03 03:45:02,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 03:45:02,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:45:02,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:45:02,264 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:45:02,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-03 03:45:02,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 03:45:02,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:45:02,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-03 03:45:02,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:45:02,430 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 03:45:02,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:45:02,724 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 03:45:02,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608188605] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:45:02,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1167153629] [2021-11-03 03:45:02,727 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-03 03:45:02,728 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 03:45:02,728 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 03:45:02,728 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 03:45:02,729 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 03:45:02,734 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:02,735 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:02,736 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:02,736 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 03:45:02,737 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:02,738 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:02,739 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 03:45:02,741 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-11-03 03:45:02,745 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_11|], 21=[|v_#valid_12|]} [2021-11-03 03:45:02,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:02,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:02,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:02,759 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 03:45:02,760 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:02,760 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 03:45:02,761 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:02,762 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 03:45:02,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 03:45:02,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:02,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:02,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:02,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:02,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:02,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:02,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:02,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:02,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:02,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:02,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:02,789 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 03:45:02,790 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:02,793 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 03:45:02,794 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:02,795 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 03:45:02,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 03:45:02,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:02,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:02,802 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:02,804 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-03 03:45:02,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 03:45:02,805 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:119, output treesize:94 [2021-11-03 03:45:02,820 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.2 percent of original size [2021-11-03 03:45:02,826 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:02,830 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:02,838 INFO L185 QuantifierPusher]: treesize reduction 4, result has 82.6 percent of original size 19 [2021-11-03 03:45:02,842 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:02,845 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:02,851 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 03:45:02,853 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-03 03:45:02,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:02,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:02,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:02,904 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:02,908 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:02,913 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:02,921 INFO L185 QuantifierPusher]: treesize reduction 4, result has 82.6 percent of original size 19 [2021-11-03 03:45:02,927 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:02,928 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:02,931 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 03:45:02,942 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 242 [2021-11-03 03:45:02,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:02,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:02,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:02,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:02,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:02,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:02,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:03,004 INFO L180 QuantifierPusher]: treesize reduction 30, result has 77.3 percent of original size [2021-11-03 03:45:03,008 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:03,013 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:03,023 INFO L185 QuantifierPusher]: treesize reduction 4, result has 82.6 percent of original size 19 [2021-11-03 03:45:03,027 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:03,029 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:03,033 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 03:45:03,034 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-03 03:45:03,039 INFO L180 QuantifierPusher]: treesize reduction 34, result has 60.0 percent of original size [2021-11-03 03:45:03,043 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-03 03:45:03,046 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 03:45:03,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 03:45:03,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 03:45:03,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2021-11-03 03:45:03,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632559692] [2021-11-03 03:45:03,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-03 03:45:03,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:45:03,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-03 03:45:03,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2021-11-03 03:45:03,231 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:03,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:45:03,292 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2021-11-03 03:45:03,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-03 03:45:03,293 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-03 03:45:03,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:45:03,294 INFO L225 Difference]: With dead ends: 30 [2021-11-03 03:45:03,294 INFO L226 Difference]: Without dead ends: 27 [2021-11-03 03:45:03,294 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2021-11-03 03:45:03,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-03 03:45:03,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-03 03:45:03,299 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 03:45:03,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-11-03 03:45:03,300 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2021-11-03 03:45:03,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:45:03,300 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-11-03 03:45:03,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:03,300 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-11-03 03:45:03,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-03 03:45:03,302 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:45:03,302 INFO L513 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2021-11-03 03:45:03,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-03 03:45:03,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-03 03:45:03,529 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:45:03,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:45:03,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1386994489, now seen corresponding path program 4 times [2021-11-03 03:45:03,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:45:03,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052101135] [2021-11-03 03:45:03,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:45:03,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:45:03,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:03,964 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 03:45:03,964 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:45:03,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052101135] [2021-11-03 03:45:03,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052101135] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 03:45:03,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658541951] [2021-11-03 03:45:03,965 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-03 03:45:03,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:45:03,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:45:03,966 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:45:03,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-03 03:45:04,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:04,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-03 03:45:04,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:45:04,206 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 03:45:04,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:45:05,159 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 03:45:05,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658541951] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:45:05,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [521390182] [2021-11-03 03:45:05,162 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-03 03:45:05,162 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 03:45:05,163 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 03:45:05,163 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 03:45:05,163 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 03:45:05,171 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:05,172 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:05,172 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:05,173 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 03:45:05,173 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:05,174 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:05,174 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 03:45:05,177 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-11-03 03:45:05,181 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_12|], 21=[|v_#valid_13|]} [2021-11-03 03:45:05,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:05,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:05,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:05,194 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 03:45:05,195 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:05,199 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 03:45:05,200 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:05,200 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 03:45:05,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 03:45:05,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:05,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:05,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:05,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:05,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:05,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:05,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:05,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:05,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:05,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:05,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:05,244 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 03:45:05,245 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:05,247 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 03:45:05,248 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:05,249 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 03:45:05,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 03:45:05,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:05,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:05,255 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:05,256 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-03 03:45:05,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 03:45:05,257 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:119, output treesize:94 [2021-11-03 03:45:05,262 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.2 percent of original size [2021-11-03 03:45:05,265 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:05,267 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:05,278 INFO L185 QuantifierPusher]: treesize reduction 4, result has 82.6 percent of original size 19 [2021-11-03 03:45:05,281 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:05,282 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:05,286 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 03:45:05,288 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 96 [2021-11-03 03:45:05,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:05,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:05,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:05,331 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:05,336 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:05,338 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:05,344 INFO L185 QuantifierPusher]: treesize reduction 4, result has 82.6 percent of original size 19 [2021-11-03 03:45:05,347 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:05,348 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:05,350 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 03:45:05,353 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 242 [2021-11-03 03:45:05,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:05,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:05,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:05,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:05,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:05,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:05,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:05,395 INFO L180 QuantifierPusher]: treesize reduction 30, result has 77.3 percent of original size [2021-11-03 03:45:05,398 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:05,399 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:05,405 INFO L185 QuantifierPusher]: treesize reduction 4, result has 82.6 percent of original size 19 [2021-11-03 03:45:05,407 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:05,408 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:05,411 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 03:45:05,412 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-03 03:45:05,418 INFO L180 QuantifierPusher]: treesize reduction 34, result has 60.0 percent of original size [2021-11-03 03:45:05,421 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-03 03:45:05,424 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 03:45:05,585 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 03:45:05,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 03:45:05,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2021-11-03 03:45:05,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068308397] [2021-11-03 03:45:05,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-03 03:45:05,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:45:05,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-03 03:45:05,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1185, Invalid=1467, Unknown=0, NotChecked=0, Total=2652 [2021-11-03 03:45:05,589 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 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 03:45:05,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:45:05,675 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2021-11-03 03:45:05,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-03 03:45:05,676 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 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 03:45:05,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:45:05,677 INFO L225 Difference]: With dead ends: 54 [2021-11-03 03:45:05,678 INFO L226 Difference]: Without dead ends: 51 [2021-11-03 03:45:05,679 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1185, Invalid=1467, Unknown=0, NotChecked=0, Total=2652 [2021-11-03 03:45:05,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-03 03:45:05,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-03 03:45:05,686 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 03:45:05,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-11-03 03:45:05,687 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 26 [2021-11-03 03:45:05,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:45:05,688 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-11-03 03:45:05,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 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 03:45:05,688 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-11-03 03:45:05,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-03 03:45:05,690 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:45:05,690 INFO L513 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1] [2021-11-03 03:45:05,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-03 03:45:05,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-03 03:45:05,917 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:45:05,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:45:05,917 INFO L85 PathProgramCache]: Analyzing trace with hash -2039293625, now seen corresponding path program 5 times [2021-11-03 03:45:05,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:45:05,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335231496] [2021-11-03 03:45:05,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:45:05,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:45:06,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:07,383 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 03:45:07,383 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:45:07,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335231496] [2021-11-03 03:45:07,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335231496] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 03:45:07,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369855145] [2021-11-03 03:45:07,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 03:45:07,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:45:07,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:45:07,396 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:45:07,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-03 03:45:07,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-11-03 03:45:07,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:45:07,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 03:45:07,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:45:07,867 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 03:45:07,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:45:11,327 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 03:45:11,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369855145] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:45:11,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1642250004] [2021-11-03 03:45:11,330 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-03 03:45:11,330 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 03:45:11,331 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 03:45:11,331 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 03:45:11,331 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 03:45:11,339 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:11,341 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:11,341 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:11,342 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 03:45:11,343 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:11,343 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:11,344 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 03:45:11,348 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-11-03 03:45:11,357 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_13|], 21=[|v_#valid_14|]} [2021-11-03 03:45:11,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:11,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:11,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:11,369 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 03:45:11,383 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:11,384 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 03:45:11,385 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:11,385 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 03:45:11,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 03:45:11,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:11,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:11,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:11,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:11,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:11,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:11,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:11,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:11,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:11,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:11,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:11,412 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 03:45:11,413 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:11,415 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 03:45:11,416 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:11,417 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 03:45:11,417 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 03:45:11,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:11,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:11,423 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:11,425 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-03 03:45:11,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 03:45:11,426 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:119, output treesize:94 [2021-11-03 03:45:11,431 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.2 percent of original size [2021-11-03 03:45:11,434 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:11,435 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:11,447 INFO L185 QuantifierPusher]: treesize reduction 4, result has 82.6 percent of original size 19 [2021-11-03 03:45:11,450 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:11,451 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:11,454 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 03:45:11,456 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 96 [2021-11-03 03:45:11,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:11,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:11,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:11,511 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:11,534 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:11,536 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:11,543 INFO L185 QuantifierPusher]: treesize reduction 4, result has 82.6 percent of original size 19 [2021-11-03 03:45:11,545 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:11,548 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:11,551 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 03:45:11,558 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 242 [2021-11-03 03:45:11,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:11,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:11,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:11,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:11,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:11,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:11,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:11,610 INFO L180 QuantifierPusher]: treesize reduction 30, result has 77.3 percent of original size [2021-11-03 03:45:11,612 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:11,614 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:11,621 INFO L185 QuantifierPusher]: treesize reduction 4, result has 82.6 percent of original size 19 [2021-11-03 03:45:11,624 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:11,625 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:11,628 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 03:45:11,632 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-03 03:45:11,638 INFO L180 QuantifierPusher]: treesize reduction 34, result has 60.0 percent of original size [2021-11-03 03:45:11,641 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-03 03:45:11,645 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 03:45:11,903 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 03:45:11,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 03:45:11,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2021-11-03 03:45:11,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060455701] [2021-11-03 03:45:11,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-03 03:45:11,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:45:11,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-03 03:45:11,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4665, Invalid=5235, Unknown=0, NotChecked=0, Total=9900 [2021-11-03 03:45:11,914 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 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 03:45:12,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:45:12,167 INFO L93 Difference]: Finished difference Result 102 states and 149 transitions. [2021-11-03 03:45:12,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-03 03:45:12,168 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 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 03:45:12,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:45:12,175 INFO L225 Difference]: With dead ends: 102 [2021-11-03 03:45:12,176 INFO L226 Difference]: Without dead ends: 99 [2021-11-03 03:45:12,181 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4665, Invalid=5235, Unknown=0, NotChecked=0, Total=9900 [2021-11-03 03:45:12,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-03 03:45:12,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-11-03 03:45:12,206 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 03:45:12,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-11-03 03:45:12,208 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 50 [2021-11-03 03:45:12,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:45:12,209 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-11-03 03:45:12,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 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 03:45:12,209 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-11-03 03:45:12,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-03 03:45:12,213 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:45:12,214 INFO L513 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1] [2021-11-03 03:45:12,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-03 03:45:12,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:45:12,429 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:45:12,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:45:12,430 INFO L85 PathProgramCache]: Analyzing trace with hash -569392569, now seen corresponding path program 6 times [2021-11-03 03:45:12,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:45:12,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881366515] [2021-11-03 03:45:12,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:45:12,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:45:12,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:16,903 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 03:45:16,903 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:45:16,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881366515] [2021-11-03 03:45:16,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881366515] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 03:45:16,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990286279] [2021-11-03 03:45:16,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 03:45:16,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:45:16,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:45:16,905 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:45:16,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-03 03:45:17,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 03:45:17,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:45:17,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-03 03:45:17,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:45:17,729 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 03:45:17,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:45:28,354 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 03:45:28,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990286279] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:45:28,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1014112837] [2021-11-03 03:45:28,357 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-03 03:45:28,358 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 03:45:28,358 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 03:45:28,358 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 03:45:28,359 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 03:45:28,367 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:28,368 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:28,368 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:28,377 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 03:45:28,378 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:28,378 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:28,379 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 03:45:28,380 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-11-03 03:45:28,386 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_14|], 21=[|v_#valid_15|]} [2021-11-03 03:45:28,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:28,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:28,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:28,397 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 03:45:28,401 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:28,402 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 03:45:28,403 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:28,403 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 03:45:28,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 03:45:28,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:28,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:28,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:28,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:28,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:28,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:28,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:28,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:28,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:28,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:28,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:45:28,436 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 03:45:28,437 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:28,440 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 03:45:28,441 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:28,441 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 03:45:28,442 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 03:45:28,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:28,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:28,448 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:28,449 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-03 03:45:28,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 03:45:28,450 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:119, output treesize:94 [2021-11-03 03:45:28,461 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.2 percent of original size [2021-11-03 03:45:28,466 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:28,467 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:28,474 INFO L185 QuantifierPusher]: treesize reduction 4, result has 82.6 percent of original size 19 [2021-11-03 03:45:28,483 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:28,484 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:28,487 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 03:45:28,489 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-03 03:45:28,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:28,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:28,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:28,551 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:28,557 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:28,583 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:28,592 INFO L185 QuantifierPusher]: treesize reduction 4, result has 82.6 percent of original size 19 [2021-11-03 03:45:28,594 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:28,595 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:28,598 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 03:45:28,602 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 242 [2021-11-03 03:45:28,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:28,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:28,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:28,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:28,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:28,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:28,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:45:28,677 INFO L180 QuantifierPusher]: treesize reduction 30, result has 77.3 percent of original size [2021-11-03 03:45:28,683 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:28,684 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:28,691 INFO L185 QuantifierPusher]: treesize reduction 4, result has 82.6 percent of original size 19 [2021-11-03 03:45:28,693 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:45:28,695 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:45:28,698 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 03:45:28,699 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-03 03:45:28,703 INFO L180 QuantifierPusher]: treesize reduction 34, result has 60.0 percent of original size [2021-11-03 03:45:28,707 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-03 03:45:28,710 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 03:45:29,080 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 03:45:29,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 03:45:29,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2021-11-03 03:45:29,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811269629] [2021-11-03 03:45:29,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2021-11-03 03:45:29,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:45:29,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2021-11-03 03:45:29,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18537, Invalid=19683, Unknown=0, NotChecked=0, Total=38220 [2021-11-03 03:45:29,107 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 193 states, 193 states have (on average 1.0155440414507773) internal successors, (196), 192 states have internal predecessors, (196), 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 03:45:29,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:45:29,827 INFO L93 Difference]: Finished difference Result 198 states and 293 transitions. [2021-11-03 03:45:29,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-03 03:45:29,829 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0155440414507773) internal successors, (196), 192 states have internal predecessors, (196), 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 03:45:29,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:45:29,831 INFO L225 Difference]: With dead ends: 198 [2021-11-03 03:45:29,831 INFO L226 Difference]: Without dead ends: 195 [2021-11-03 03:45:29,839 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=18537, Invalid=19683, Unknown=0, NotChecked=0, Total=38220 [2021-11-03 03:45:29,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-03 03:45:29,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-11-03 03:45:29,856 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 03:45:29,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2021-11-03 03:45:29,859 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 98 [2021-11-03 03:45:29,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:45:29,860 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2021-11-03 03:45:29,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0155440414507773) internal successors, (196), 192 states have internal predecessors, (196), 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 03:45:29,860 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2021-11-03 03:45:29,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-03 03:45:29,865 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:45:29,865 INFO L513 BasicCegarLoop]: trace histogram [190, 1, 1, 1, 1] [2021-11-03 03:45:29,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-03 03:45:30,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-11-03 03:45:30,086 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:45:30,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:45:30,087 INFO L85 PathProgramCache]: Analyzing trace with hash 281515079, now seen corresponding path program 7 times [2021-11-03 03:45:30,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:45:30,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57046239] [2021-11-03 03:45:30,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:45:30,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:45:30,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:44,672 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 03:45:44,672 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:45:44,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57046239] [2021-11-03 03:45:44,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57046239] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 03:45:44,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25011142] [2021-11-03 03:45:44,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-03 03:45:44,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:45:44,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:45:44,674 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:45:44,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-03 03:45:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:45,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 1181 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-03 03:45:45,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:45:46,019 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 03:45:46,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:46:27,968 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 03:46:27,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25011142] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:46:27,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1292375298] [2021-11-03 03:46:27,972 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-03 03:46:27,972 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 03:46:27,972 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 03:46:27,973 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 03:46:27,973 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 03:46:27,978 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:27,979 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:46:27,979 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:27,980 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 03:46:27,980 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:46:27,983 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:27,984 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 03:46:27,985 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-11-03 03:46:27,987 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_15|], 21=[|v_#valid_16|]} [2021-11-03 03:46:27,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:27,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:27,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:27,999 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 03:46:28,000 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:28,000 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 03:46:28,000 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:28,001 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 03:46:28,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 03:46:28,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:28,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:28,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:28,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:28,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:28,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:28,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:28,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:28,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:28,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:28,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:28,035 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 03:46:28,036 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:28,039 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 03:46:28,039 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:28,040 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 03:46:28,040 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 03:46:28,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:28,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:28,046 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:28,047 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-03 03:46:28,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 03:46:28,048 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:119, output treesize:94 [2021-11-03 03:46:28,053 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.2 percent of original size [2021-11-03 03:46:28,055 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:46:28,057 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:28,067 INFO L185 QuantifierPusher]: treesize reduction 4, result has 82.6 percent of original size 19 [2021-11-03 03:46:28,069 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:46:28,070 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:28,073 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 03:46:28,074 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-03 03:46:28,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:28,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:28,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:28,143 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:28,145 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:46:28,147 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:28,154 INFO L185 QuantifierPusher]: treesize reduction 4, result has 82.6 percent of original size 19 [2021-11-03 03:46:28,157 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:46:28,164 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:28,167 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 03:46:28,172 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 242 [2021-11-03 03:46:28,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:28,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:28,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:28,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:28,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:28,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:28,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:28,221 INFO L180 QuantifierPusher]: treesize reduction 30, result has 77.3 percent of original size [2021-11-03 03:46:28,225 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:46:28,226 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:28,233 INFO L185 QuantifierPusher]: treesize reduction 4, result has 82.6 percent of original size 19 [2021-11-03 03:46:28,235 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:46:28,236 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:28,239 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 03:46:28,240 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-03 03:46:28,244 INFO L180 QuantifierPusher]: treesize reduction 34, result has 60.0 percent of original size [2021-11-03 03:46:28,248 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-03 03:46:28,251 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 03:46:28,754 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 03:46:28,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 03:46:28,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384 [2021-11-03 03:46:28,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546967614] [2021-11-03 03:46:28,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2021-11-03 03:46:28,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:46:28,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2021-11-03 03:46:28,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73929, Invalid=76227, Unknown=0, NotChecked=0, Total=150156 [2021-11-03 03:46:28,825 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand has 385 states, 385 states have (on average 1.0077922077922077) internal successors, (388), 384 states have internal predecessors, (388), 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 03:46:31,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:46:31,203 INFO L93 Difference]: Finished difference Result 390 states and 581 transitions. [2021-11-03 03:46:31,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2021-11-03 03:46:31,204 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 1.0077922077922077) internal successors, (388), 384 states have internal predecessors, (388), 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 03:46:31,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:46:31,208 INFO L225 Difference]: With dead ends: 390 [2021-11-03 03:46:31,208 INFO L226 Difference]: Without dead ends: 387 [2021-11-03 03:46:31,218 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2479 ImplicationChecksByTransitivity, 54.9s TimeCoverageRelationStatistics Valid=73929, Invalid=76227, Unknown=0, NotChecked=0, Total=150156 [2021-11-03 03:46:31,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-03 03:46:31,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2021-11-03 03:46:31,247 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 03:46:31,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 387 transitions. [2021-11-03 03:46:31,252 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 387 transitions. Word has length 194 [2021-11-03 03:46:31,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:46:31,253 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 387 transitions. [2021-11-03 03:46:31,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 1.0077922077922077) internal successors, (388), 384 states have internal predecessors, (388), 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 03:46:31,255 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 387 transitions. [2021-11-03 03:46:31,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2021-11-03 03:46:31,266 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:46:31,266 INFO L513 BasicCegarLoop]: trace histogram [382, 1, 1, 1, 1] [2021-11-03 03:46:31,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-03 03:46:31,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-11-03 03:46:31,489 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:46:31,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:46:31,489 INFO L85 PathProgramCache]: Analyzing trace with hash -198231993, now seen corresponding path program 8 times [2021-11-03 03:46:31,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:46:31,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232163605] [2021-11-03 03:46:31,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:46:31,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:46:32,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:47:29,489 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 03:47:29,489 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:47:29,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232163605] [2021-11-03 03:47:29,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232163605] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 03:47:29,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237304035] [2021-11-03 03:47:29,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 03:47:29,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:47:29,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:47:29,496 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:47:29,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-03 03:47:33,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 192 check-sat command(s) [2021-11-03 03:47:33,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:47:33,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 2333 conjuncts, 384 conjunts are in the unsatisfiable core [2021-11-03 03:47:33,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:47:34,840 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 03:47:34,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:50:18,938 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 03:50:18,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237304035] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:50:18,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [114422545] [2021-11-03 03:50:18,941 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-03 03:50:18,941 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 03:50:18,941 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 03:50:18,942 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 03:50:18,942 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 03:50:18,952 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:18,953 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:50:18,954 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:18,954 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 03:50:18,955 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:50:18,955 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:18,956 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 03:50:18,957 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-11-03 03:50:18,959 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_16|], 21=[|v_#valid_17|]} [2021-11-03 03:50:18,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:18,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:18,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:18,968 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 03:50:18,969 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:18,970 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 03:50:18,970 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:18,971 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 03:50:18,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 03:50:18,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:18,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:18,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:18,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:18,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:18,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:18,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:18,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:18,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:18,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:18,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:18,989 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 03:50:18,990 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:18,992 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 03:50:18,992 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:18,993 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 03:50:18,993 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 03:50:18,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:18,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:18,997 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:18,999 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-03 03:50:18,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 03:50:18,999 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:119, output treesize:94 [2021-11-03 03:50:19,003 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.2 percent of original size [2021-11-03 03:50:19,004 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:50:19,005 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:19,010 INFO L185 QuantifierPusher]: treesize reduction 4, result has 82.6 percent of original size 19 [2021-11-03 03:50:19,012 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:50:19,013 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:19,015 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 03:50:19,016 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 96 [2021-11-03 03:50:19,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:19,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:19,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:19,048 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:19,052 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:50:19,053 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:19,058 INFO L185 QuantifierPusher]: treesize reduction 4, result has 82.6 percent of original size 19 [2021-11-03 03:50:19,059 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:50:19,060 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:19,062 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 03:50:19,065 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 242 [2021-11-03 03:50:19,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:19,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:19,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:19,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:19,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:19,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:19,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:19,097 INFO L180 QuantifierPusher]: treesize reduction 30, result has 77.3 percent of original size [2021-11-03 03:50:19,099 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:50:19,100 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:19,105 INFO L185 QuantifierPusher]: treesize reduction 4, result has 82.6 percent of original size 19 [2021-11-03 03:50:19,107 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:50:19,107 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:19,109 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 03:50:19,110 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-03 03:50:19,114 INFO L180 QuantifierPusher]: treesize reduction 34, result has 60.0 percent of original size [2021-11-03 03:50:19,116 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-03 03:50:19,118 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 03:50:19,831 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 03:50:19,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 03:50:19,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [384, 384, 384] total 768 [2021-11-03 03:50:19,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539241582] [2021-11-03 03:50:19,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 769 states [2021-11-03 03:50:19,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:50:19,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 769 interpolants. [2021-11-03 03:50:19,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295305, Invalid=299907, Unknown=0, NotChecked=0, Total=595212 [2021-11-03 03:50:19,905 INFO L87 Difference]: Start difference. First operand 387 states and 387 transitions. Second operand has 769 states, 769 states have (on average 1.0039011703511054) internal successors, (772), 768 states have internal predecessors, (772), 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 03:50:37,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:50:37,350 INFO L93 Difference]: Finished difference Result 774 states and 1157 transitions. [2021-11-03 03:50:37,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2021-11-03 03:50:37,351 INFO L78 Accepts]: Start accepts. Automaton has has 769 states, 769 states have (on average 1.0039011703511054) internal successors, (772), 768 states have internal predecessors, (772), 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 03:50:37,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:50:37,356 INFO L225 Difference]: With dead ends: 774 [2021-11-03 03:50:37,356 INFO L226 Difference]: Without dead ends: 771 [2021-11-03 03:50:37,390 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1540 GetRequests, 770 SyntacticMatches, 0 SemanticMatches, 770 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4975 ImplicationChecksByTransitivity, 218.3s TimeCoverageRelationStatistics Valid=295305, Invalid=299907, Unknown=0, NotChecked=0, Total=595212 [2021-11-03 03:50:37,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-11-03 03:50:37,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 771. [2021-11-03 03:50:37,433 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 03:50:37,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 771 transitions. [2021-11-03 03:50:37,440 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 771 transitions. Word has length 386 [2021-11-03 03:50:37,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:50:37,441 INFO L470 AbstractCegarLoop]: Abstraction has 771 states and 771 transitions. [2021-11-03 03:50:37,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 769 states, 769 states have (on average 1.0039011703511054) internal successors, (772), 768 states have internal predecessors, (772), 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 03:50:37,443 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 771 transitions. [2021-11-03 03:50:37,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2021-11-03 03:50:37,472 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:50:37,473 INFO L513 BasicCegarLoop]: trace histogram [766, 1, 1, 1, 1] [2021-11-03 03:50:37,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-03 03:50:37,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:50:37,701 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:50:37,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:50:37,701 INFO L85 PathProgramCache]: Analyzing trace with hash 853442631, now seen corresponding path program 9 times [2021-11-03 03:50:37,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:50:37,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617869243] [2021-11-03 03:50:37,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:50:37,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:50:42,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:53:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 293761 backedges. 0 proven. 293761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:53:59,398 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:53:59,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617869243] [2021-11-03 03:53:59,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617869243] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 03:53:59,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793112782] [2021-11-03 03:53:59,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 03:53:59,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:53:59,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:53:59,408 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:53:59,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f3a34-1fbe-4226-bd64-1c7ed44b1498/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-03 03:54:01,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 03:54:01,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:54:01,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 4637 conjuncts, 768 conjunts are in the unsatisfiable core [2021-11-03 03:54:01,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:54:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 293761 backedges. 0 proven. 293761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:54:03,398 INFO L328 TraceCheckSpWp]: Computing backward predicates...