./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2018/Problem11.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2018/Problem11.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs --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 940624650400628fbc547d76c7cce642a9063fb1576962b71733623b165f113e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:16:58,928 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:16:58,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:16:58,995 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:16:58,996 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:16:59,000 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:16:59,002 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:16:59,007 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:16:59,010 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:16:59,016 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:16:59,018 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:16:59,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:16:59,020 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:16:59,024 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:16:59,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:16:59,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:16:59,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:16:59,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:16:59,042 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:16:59,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:16:59,047 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:16:59,048 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:16:59,050 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:16:59,051 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:16:59,055 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:16:59,056 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:16:59,056 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:16:59,057 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:16:59,058 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:16:59,060 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:16:59,060 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:16:59,072 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:16:59,073 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:16:59,074 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:16:59,075 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:16:59,076 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:16:59,076 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:16:59,077 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:16:59,077 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:16:59,078 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:16:59,079 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:16:59,080 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:16:59,106 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:16:59,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:16:59,108 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:16:59,108 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:16:59,108 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:16:59,108 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:16:59,109 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:16:59,109 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:16:59,109 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:16:59,109 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:16:59,110 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:16:59,110 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:16:59,110 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:16:59,110 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:16:59,111 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:16:59,111 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:16:59,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:16:59,112 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:16:59,112 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:16:59,112 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:16:59,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:16:59,113 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:16:59,113 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:16:59,114 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:16:59,114 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:16:59,114 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:16:59,114 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:16:59,114 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:16:59,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:16:59,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:16:59,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:16:59,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:16:59,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:16:59,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:16:59,116 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:16:59,117 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:16:59,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:16:59,117 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:16:59,117 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:16:59,117 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:16:59,118 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_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 940624650400628fbc547d76c7cce642a9063fb1576962b71733623b165f113e [2021-11-19 14:16:59,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:16:59,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:16:59,407 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:16:59,409 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:16:59,412 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:16:59,413 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/eca-rers2018/Problem11.c [2021-11-19 14:16:59,485 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/data/61b2ad0f0/eee525b29ed74033b504892bc6f2f6fa/FLAG058d44713 [2021-11-19 14:17:00,336 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:17:00,337 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/sv-benchmarks/c/eca-rers2018/Problem11.c [2021-11-19 14:17:00,384 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/data/61b2ad0f0/eee525b29ed74033b504892bc6f2f6fa/FLAG058d44713 [2021-11-19 14:17:00,418 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/data/61b2ad0f0/eee525b29ed74033b504892bc6f2f6fa [2021-11-19 14:17:00,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:17:00,426 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:17:00,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:17:00,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:17:00,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:17:00,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:17:00" (1/1) ... [2021-11-19 14:17:00,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@593ebe65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:00, skipping insertion in model container [2021-11-19 14:17:00,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:17:00" (1/1) ... [2021-11-19 14:17:00,448 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:17:00,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:17:00,735 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/sv-benchmarks/c/eca-rers2018/Problem11.c[778,791] [2021-11-19 14:17:00,742 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/sv-benchmarks/c/eca-rers2018/Problem11.c[817,830] [2021-11-19 14:17:01,751 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:17:01,764 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:17:01,778 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/sv-benchmarks/c/eca-rers2018/Problem11.c[778,791] [2021-11-19 14:17:01,779 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/sv-benchmarks/c/eca-rers2018/Problem11.c[817,830] [2021-11-19 14:17:02,041 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:17:02,141 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:17:02,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:02 WrapperNode [2021-11-19 14:17:02,142 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:17:02,143 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:17:02,144 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:17:02,144 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:17:02,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:02" (1/1) ... [2021-11-19 14:17:02,230 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:02" (1/1) ... [2021-11-19 14:17:02,502 INFO L137 Inliner]: procedures = 286, calls = 252, calls flagged for inlining = 148, calls inlined = 148, statements flattened = 2260 [2021-11-19 14:17:02,502 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:17:02,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:17:02,503 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:17:02,504 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:17:02,513 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:02" (1/1) ... [2021-11-19 14:17:02,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:02" (1/1) ... [2021-11-19 14:17:02,590 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:02" (1/1) ... [2021-11-19 14:17:02,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:02" (1/1) ... [2021-11-19 14:17:02,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:02" (1/1) ... [2021-11-19 14:17:02,774 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:02" (1/1) ... [2021-11-19 14:17:02,801 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:02" (1/1) ... [2021-11-19 14:17:02,843 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:17:02,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:17:02,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:17:02,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:17:02,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:02" (1/1) ... [2021-11-19 14:17:02,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:17:02,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:17:02,885 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:17:02,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:17:03,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:17:03,013 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_a [2021-11-19 14:17:03,013 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_a [2021-11-19 14:17:03,013 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_b [2021-11-19 14:17:03,013 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_b [2021-11-19 14:17:03,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 14:17:03,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:17:03,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:17:03,292 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:17:03,303 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:17:56,282 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:18:14,155 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:18:14,155 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:18:14,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:18:14 BoogieIcfgContainer [2021-11-19 14:18:14,159 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:18:14,161 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:18:14,161 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:18:14,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:18:14,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:17:00" (1/3) ... [2021-11-19 14:18:14,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4095a52b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:18:14, skipping insertion in model container [2021-11-19 14:18:14,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:02" (2/3) ... [2021-11-19 14:18:14,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4095a52b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:18:14, skipping insertion in model container [2021-11-19 14:18:14,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:18:14" (3/3) ... [2021-11-19 14:18:14,169 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem11.c [2021-11-19 14:18:14,175 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:18:14,175 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-19 14:18:14,236 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:18:14,245 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 [2021-11-19 14:18:14,245 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-19 14:18:14,277 INFO L276 IsEmpty]: Start isEmpty. Operand has 312 states, 207 states have (on average 1.502415458937198) internal successors, (311), 209 states have internal predecessors, (311), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-19 14:18:14,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-19 14:18:14,282 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:18:14,283 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-19 14:18:14,284 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:18:14,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:18:14,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1702005715, now seen corresponding path program 1 times [2021-11-19 14:18:14,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:18:14,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967728175] [2021-11-19 14:18:14,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:18:14,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:18:14,540 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 14:18:14,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [850620377] [2021-11-19 14:18:14,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:18:14,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:18:14,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:18:14,544 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:18:14,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 14:18:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:18:16,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 14:18:16,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:21:03,456 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:21:03,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967728175] [2021-11-19 14:21:03,457 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 14:21:03,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850620377] [2021-11-19 14:21:03,458 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-19 14:21:03,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1263923886] [2021-11-19 14:21:03,511 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-19 14:21:03,511 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:21:03,516 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-19 14:21:03,523 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-19 14:21:03,524 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-19 14:21:03,576 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:21:03,579 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 14:21:03,580 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:21:03,581 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-11-19 14:21:03,597 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 359 [2021-11-19 14:21:03,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 54 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 51 [2021-11-19 14:21:03,680 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:21:03,681 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-19 14:21:03,682 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:21:03,682 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-19 14:21:03,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-19 14:21:03,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:21:03,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:21:03,883 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:21:03,895 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 375 [2021-11-19 14:21:03,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-19 14:21:03,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:358, output treesize:375 [2021-11-19 14:21:03,918 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:21:03,934 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 383 [2021-11-19 14:21:04,027 FATAL L? ?]: Ignoring exception! java.lang.ArithmeticException: BigInteger: modulus not positive at java.base/java.math.BigInteger.mod(BigInteger.java:2697) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyNestedModulo(SmtUtils.java:1847) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.mod(SmtUtils.java:1816) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.termWithLocalSimplification(SmtUtils.java:1436) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.termWithLocalSimplification(SmtUtils.java:1360) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.convertApplicationTerm(SmtUtils.java:1349) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SubstitutionWithLocalSimplification.convertApplicationTerm(SubstitutionWithLocalSimplification.java:49) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:339) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IteRemover.removeIteTerm(IteRemover.java:91) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IteRemover.transformNonCoreBooleanSubterm(IteRemover.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.NonCoreBooleanSubTermTransformer$NonCoreBooleanSubtermTransformerHelper.convert(NonCoreBooleanSubTermTransformer.java:91) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.NonCoreBooleanSubTermTransformer.transform(NonCoreBooleanSubTermTransformer.java:51) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.elimPushPull(PartialQuantifierElimination.java:292) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.elimPushPull(PartialQuantifierElimination.java:286) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:214) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-19 14:21:04,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:21:04,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-19 14:21:04,031 ERROR L172 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2021-11-19 14:21:04,033 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-19 14:21:04,040 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-19 14:21:04,043 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-19 14:21:04,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:21:04,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:21:04,272 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-19 14:21:04,275 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-19 14:21:04,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 02:21:04 BoogieIcfgContainer [2021-11-19 14:21:04,314 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-19 14:21:04,315 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-19 14:21:04,315 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-19 14:21:04,315 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-19 14:21:04,319 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:18:14" (3/4) ... [2021-11-19 14:21:04,323 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-19 14:21:04,323 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-19 14:21:04,324 INFO L158 Benchmark]: Toolchain (without parser) took 243897.67ms. Allocated memory was 90.2MB in the beginning and 4.7GB in the end (delta: 4.6GB). Free memory was 52.7MB in the beginning and 3.6GB in the end (delta: -3.6GB). Peak memory consumption was 1.0GB. Max. memory is 16.1GB. [2021-11-19 14:21:04,325 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 90.2MB. Free memory was 57.7MB in the beginning and 57.6MB in the end (delta: 45.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:21:04,327 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1711.09ms. Allocated memory was 90.2MB in the beginning and 115.3MB in the end (delta: 25.2MB). Free memory was 52.5MB in the beginning and 53.1MB in the end (delta: -553.3kB). Peak memory consumption was 44.4MB. Max. memory is 16.1GB. [2021-11-19 14:21:04,328 INFO L158 Benchmark]: Boogie Procedure Inliner took 359.16ms. Allocated memory is still 115.3MB. Free memory was 53.1MB in the beginning and 44.0MB in the end (delta: 9.1MB). Peak memory consumption was 24.8MB. Max. memory is 16.1GB. [2021-11-19 14:21:04,329 INFO L158 Benchmark]: Boogie Preprocessor took 340.23ms. Allocated memory was 115.3MB in the beginning and 169.9MB in the end (delta: 54.5MB). Free memory was 44.0MB in the beginning and 95.6MB in the end (delta: -51.5MB). Peak memory consumption was 24.1MB. Max. memory is 16.1GB. [2021-11-19 14:21:04,332 INFO L158 Benchmark]: RCFGBuilder took 71314.93ms. Allocated memory was 169.9MB in the beginning and 2.3GB in the end (delta: 2.2GB). Free memory was 95.6MB in the beginning and 1.6GB in the end (delta: -1.5GB). Peak memory consumption was 887.7MB. Max. memory is 16.1GB. [2021-11-19 14:21:04,333 INFO L158 Benchmark]: TraceAbstraction took 170152.69ms. Allocated memory was 2.3GB in the beginning and 4.7GB in the end (delta: 2.3GB). Free memory was 1.6GB in the beginning and 3.6GB in the end (delta: -2.0GB). Peak memory consumption was 357.6MB. Max. memory is 16.1GB. [2021-11-19 14:21:04,334 INFO L158 Benchmark]: Witness Printer took 8.76ms. Allocated memory is still 4.7GB. Free memory was 3.6GB in the beginning and 3.6GB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:21:04,342 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 90.2MB. Free memory was 57.7MB in the beginning and 57.6MB in the end (delta: 45.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1711.09ms. Allocated memory was 90.2MB in the beginning and 115.3MB in the end (delta: 25.2MB). Free memory was 52.5MB in the beginning and 53.1MB in the end (delta: -553.3kB). Peak memory consumption was 44.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 359.16ms. Allocated memory is still 115.3MB. Free memory was 53.1MB in the beginning and 44.0MB in the end (delta: 9.1MB). Peak memory consumption was 24.8MB. Max. memory is 16.1GB. * Boogie Preprocessor took 340.23ms. Allocated memory was 115.3MB in the beginning and 169.9MB in the end (delta: 54.5MB). Free memory was 44.0MB in the beginning and 95.6MB in the end (delta: -51.5MB). Peak memory consumption was 24.1MB. Max. memory is 16.1GB. * RCFGBuilder took 71314.93ms. Allocated memory was 169.9MB in the beginning and 2.3GB in the end (delta: 2.2GB). Free memory was 95.6MB in the beginning and 1.6GB in the end (delta: -1.5GB). Peak memory consumption was 887.7MB. Max. memory is 16.1GB. * TraceAbstraction took 170152.69ms. Allocated memory was 2.3GB in the beginning and 4.7GB in the end (delta: 2.3GB). Free memory was 1.6GB in the beginning and 3.6GB in the end (delta: -2.0GB). Peak memory consumption was 357.6MB. Max. memory is 16.1GB. * Witness Printer took 8.76ms. Allocated memory is still 4.7GB. Free memory was 3.6GB in the beginning and 3.6GB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L118] int inputs[] = {7,10,6,2,5,3,9,4,8,1}; [L292] int a589117628 = 34; [L293] int a1290652559 = 4; [L294] int a236788248 = 16; [L295] int a1580522136 = 161; [L296] int a45685611 = 11; [L297] int a1889803145 = 118; [L298] int a910748832 = 36; [L299] int a471011792 = 10; [L300] int a946891643 = 5; [L301] int a665096794 = 11; [L302] int a850881173 = 141; [L303] int a2040628137 = 8; [L304] int a583510163 = 77; [L305] int a1859402009 = 14; [L306] int a268371874 = 51; [L307] int a837448621 = 32; [L308] int a824024208 = 32; [L309] int a1171576990 = 32; [L310] int a1422023390 = -4; [L311] int a1605463015 = 9; [L312] int a812175843 = 36; [L313] int a890181220 = 32; [L314] int a808219163 = 35; [L315] int a1210734340 = 58; [L316] int a1864015649 = 33; [L317] int a1944090451 = 34; [L318] int a412613099 = -28; [L319] int a2139179119 = 15; [L320] int cf = 1; [L321] int a648283191 = -108; [L322] int a71064409 = -168; [L323] int a499699109 = 3; [L324] int a1001390225 = -24; [L325] int a274381288 = 312; [L326] int a1218264876 = 32; [L327] int a1535937505 = 32; [L328] int a1879373572 = 32; [L329] int a2064844468 = 32; [L330] int a182175502 = 7; [L331] int a482477713 = 8; [L332] int a44138666 = 36; [L333] int a418218587 = 36; [L334] int a621522874 = 131; [L335] int a2083223046 = 35; [L336] int a1179664392 = 33; [L337] int a166920931 = 8; [L338] int a1684594625 = 108; [L339] int a1534902259 = 32; [L340] int a430318312 = 3; [L341] int a1821141922 = 35; [L342] int a835102539 = 5; [L343] int a2079503415 = 13; [L344] int a1071924404 = 34; [L345] int a2061255735 = 6; [L346] int a2122722213 = 2; [L347] int a552913881 = 520; [L348] int a173429297 = -35; [L349] int a763506461 = 0; [L350] int a635353122 = 1; [L351] int a1075927325 = 0; [L352] int a434613686 = 0; [L353] int a95561532 = 0; [L354] int a1487195600 = 1; [L355] int a275262794 = 0; [L356] int a273635060 = 1; [L357] int a1221017635 = 0; [L358] int a311962986 = 0; [L359] int a2084484762 = 0; [L360] int a460288454 = 0; [L361] int a418880267 = 1; [L362] int a1264277206 = 1; [L363] int a1355501303 = 1; [L364] int a547738254 = 0; [L365] int a1515611838 = 0; [L366] int a514396383 = 2; [L367] int a1955344686 = 0; [L368] int a220097023 = 1; [L369] int a1053339053 = 2; [L370] int a501521675 = 3; [L371] int a487646776 = 2; [L372] int a1716545843 = 0; [L373] int a51415461 = 3; [L374] int a1425431969 = 2; [L375] int a416125995 = 3; [L376] int a1498331231 = 1; [L377] int a1148381820 = 2; [L378] int a838736370 = 2; [L379] int a834109496 = 3; [L380] int a1859169403 = 0; [L381] int a1743588795 = 1; [L382] int a112204540 = 3; [L383] int a1347184625 = 1; [L2448] COND TRUE 1 [L2451] int input; [L2452] input = __VERIFIER_nondet_int() [L2454] COND FALSE !((input != 7) && (input != 10) && (input != 6) && (input != 2) && (input != 5) && (input != 3) && (input != 9) && (input != 4) && (input != 8) && (input != 1)) [L2456] CALL calculate_output(input) [L2364] cf = 1 [L2366] COND TRUE (a850881173 <= 37 && ((((a1210734340 <= 17 && (( cf==1 && a471011792 == 5) && a1001390225 <= -146)) && a1879373572 == 33) && a665096794 == 10) && a837448621 == 33)) [L2367] COND TRUE (a2061255735 == 5 && ((a182175502 == 6 && ((a2040628137 == 7 && (a412613099 <= -144 && (a44138666 == 36 && cf==1 ))) && a835102539 == 4)) && a665096794 == 10)) [L2368] CALL calculate_outputm5(input) [L833] COND FALSE !((((a1290652559 == 3 && ( cf==1 && a236788248 == 17)) && a1001390225 <= -146) && (((a412613099 <= -144 && a268371874 <= 28) && a2040628137 == 7) && a1879373572 == 33))) [L2368] RET calculate_outputm5(input) [L2371] COND FALSE !(((((28 < a268371874) && (76 >= a268371874)) && (a2061255735 == 6 && (((a182175502 == 7 && a837448621 == 32) && a1879373572 == 32) && a1171576990 == 32))) && (a471011792 == 6 && cf==1 ))) [L2385] COND TRUE (((a2061255735 == 7 && ((a471011792 == 7 && cf==1 ) && a1290652559 == 5)) && a665096794 == 12) && ((a2040628137 == 9 && a1879373572 == 34) && ((51 < a1001390225) && (148 >= a1001390225)))) [L2386] COND TRUE ((a2064844468 == 34 && a665096794 == 12) && (a1171576990 == 34 && (a890181220 == 34 && (a837448621 == 34 && (a1290652559 == 5 && (a418218587 == 32 && cf==1 )))))) [L2387] CALL calculate_outputm15(input) [L1277] COND FALSE !(((((523 < a621522874 && cf==1 ) && a182175502 == 8) && a837448621 == 34) && ((a1534902259 == 34 && (((184 < a850881173) && (386 >= a850881173)) && a2061255735 == 7)) && ((-18 < a412613099) && (36 >= a412613099))))) [L2387] RET calculate_outputm15(input) [L2390] COND TRUE ((a412613099 <= -144 && (a1290652559 == 3 && a182175502 == 6)) && ((a1534902259 == 33 && (a2061255735 == 5 && ( cf==1 && a471011792 == 8))) && a2064844468 == 33)) [L2391] COND TRUE ((((a665096794 == 10 && a837448621 == 33) && a583510163 <= 8) && a1171576990 == 33) && ((a1879373572 == 33 && ( cf==1 && a1179664392 == 33)) && a268371874 <= 28)) [L2392] CALL calculate_outputm19(input) [L1371] COND FALSE !(((((a665096794 == 10 && a583510163 <= 8) && a890181220 == 33) && a1171576990 == 33) && (a1001390225 <= -146 && ((a1605463015 == 10 && cf==1 ) && a1210734340 <= 17)))) [L2392] RET calculate_outputm19(input) [L2394] COND TRUE (((a1179664392 == 34 && cf==1 ) && a665096794 == 10) && (a837448621 == 33 && (a1879373572 == 33 && ((a2061255735 == 5 && a850881173 <= 37) && a268371874 <= 28)))) [L2395] CALL calculate_outputm21(input) [L1402] COND FALSE !(((( cf==1 && ((-77 < a71064409) && (127 >= a71064409))) && a1879373572 == 33) && (a1534902259 == 33 && (a1210734340 <= 17 && ((a1001390225 <= -146 && a665096794 == 10) && a835102539 == 4))))) [L2395] RET calculate_outputm21(input) [L2398] COND TRUE (((a1534902259 == 33 && (a1171576990 == 33 && a890181220 == 33)) && a665096794 == 10) && (a2061255735 == 5 && ((a471011792 == 9 && cf==1 ) && a268371874 <= 28))) [L2399] COND FALSE !(((( cf==1 && a236788248 == 14) && a1001390225 <= -146) && (a2061255735 == 5 && (a665096794 == 10 && ((a1171576990 == 33 && a850881173 <= 37) && a1534902259 == 33))))) [L2402] COND TRUE ((a182175502 == 6 && (a2040628137 == 7 && a1879373572 == 33)) && (a837448621 == 33 && (((a236788248 == 15 && cf==1 ) && a412613099 <= -144) && a835102539 == 4))) [L2403] CALL calculate_outputm28(input) [L1499] COND FALSE !(((((a1001390225 <= -146 && a412613099 <= -144) && a2064844468 == 33) && a835102539 == 4) && (a1210734340 <= 17 && ((a2079503415 == 10 && cf==1 ) && a1879373572 == 33)))) [L2403] RET calculate_outputm28(input) [L2405] COND FALSE !(((a1001390225 <= -146 && a890181220 == 33) && ((((a2061255735 == 5 && (a236788248 == 17 && cf==1 )) && a2064844468 == 33) && a850881173 <= 37) && a1210734340 <= 17))) [L2409] COND TRUE ((a1290652559 == 4 && (a1171576990 == 32 && ((37 < a850881173) && (184 >= a850881173)))) && ((a2064844468 == 32 && (((8 < a583510163) && (150 >= a583510163)) && (a471011792 == 10 && cf==1 ))) && a2040628137 == 8)) [L2410] COND TRUE ((a837448621 == 32 && ((a2040628137 == 8 && (a182175502 == 7 && ((37 < a850881173) && (184 >= a850881173)))) && a835102539 == 5)) && (((17 < a1210734340) && (187 >= a1210734340)) && ( cf==1 && ((383 < a552913881) && (501 >= a552913881))))) [L2411] CALL calculate_outputm32(input) [L1659] COND FALSE !((((((a837448621 == 32 && ((-144 < a412613099) && (-18 >= a412613099))) && a1879373572 == 32) && a890181220 == 32) && ((8 < a583510163) && (150 >= a583510163))) && ((a1179664392 == 32 && cf==1 ) && a2064844468 == 32))) [L2411] RET calculate_outputm32(input) [L2413] COND TRUE (((a1171576990 == 32 && (501 < a552913881 && cf==1 )) && a1290652559 == 4) && (a1879373572 == 32 && ((((8 < a583510163) && (150 >= a583510163)) && ((37 < a850881173) && (184 >= a850881173))) && a2040628137 == 8))) [L2414] CALL calculate_outputm33(input) [L1795] COND TRUE ((a835102539 == 5 && (((-144 < a412613099) && (-18 >= a412613099)) && a2061255735 == 6)) && ((a890181220 == 32 && (( cf==1 && ((80 < a274381288) && (206 >= a274381288))) && ((8 < a583510163) && (150 >= a583510163)))) && a2040628137 == 8)) [L1796] CALL calculate_outputm139(input) [L1664] COND FALSE !((((a1290652559 == 4 && a665096794 == 11) && a1534902259 == 32) && (a1171576990 == 32 && ((((input == 5) && cf==1 ) && ((17 < a1210734340) && (187 >= a1210734340))) && a182175502 == 7)))) [L1674] COND TRUE ((((((-146 < a1001390225) && (51 >= a1001390225)) && ((((17 < a1210734340) && (187 >= a1210734340)) && ((8 < a583510163) && (150 >= a583510163))) && a1171576990 == 32)) && a1879373572 == 32) && a835102539 == 5) && ( cf==1 && (input == 8))) [L1675] EXPR (a763506461 + 20) > a763506461 ? 4 : 0 [L1675] a763506461 += (a763506461 + 20) > a763506461 ? 4 : 0 [L1676] EXPR (a2084484762 + 20) > a2084484762 ? 6 : 0 [L1676] a2084484762 += (a2084484762 + 20) > a2084484762 ? 6 : 0 [L1677] EXPR (a418880267 - 20) < a418880267 ? 6 : 0 [L1677] a418880267 -= (a418880267 - 20) < a418880267 ? 6 : 0 [L1678] EXPR (a1264277206 + 20) > a1264277206 ? 4 : 0 [L1678] a1264277206 += (a1264277206 + 20) > a1264277206 ? 4 : 0 [L1679] EXPR (a1515611838 - 20) < a1515611838 ? 4 : 0 [L1679] a1515611838 -= (a1515611838 - 20) < a1515611838 ? 4 : 0 [L1680] EXPR (a416125995 + 20) > a416125995 ? 1 : 0 [L1680] a416125995 += (a416125995 + 20) > a416125995 ? 1 : 0 [L1681] EXPR (a834109496 + 20) > a834109496 ? 1 : 0 [L1681] a834109496 += (a834109496 + 20) > a834109496 ? 1 : 0 [L1682] cf = 0 [L1683] a2122722213 = (a2061255735 + -1) [L1684] a837448621 = 32 [L1685] a1580522136 = (((((((a268371874 * a1001390225) % 54) - -101) - 2977) * 5) % 54) - -154) [L1686] a471011792 = (a2061255735 + 6) [L1689] COND FALSE !(((((((input == 9) && cf==1 ) && ((-144 < a412613099) && (-18 >= a412613099))) && a890181220 == 32) && a1879373572 == 32) && (a1171576990 == 32 && (a2064844468 == 32 && ((-146 < a1001390225) && (51 >= a1001390225)))))) [L1700] COND FALSE !((((((a2064844468 == 32 && a1879373572 == 32) && a890181220 == 32) && a1171576990 == 32) && (a1534902259 == 32 && (((input == 3) && cf==1 ) && a2061255735 == 6))) && a1955344686 == 14)) [L1718] COND TRUE ((((((-146 < a1001390225) && (51 >= a1001390225)) && a1290652559 == 4) && ((-144 < a412613099) && (-18 >= a412613099))) && ((((37 < a850881173) && (184 >= a850881173)) && (( cf==1 && (input == 2)) && ((28 < a268371874) && (76 >= a268371874)))) && ((8 < a583510163) && (150 >= a583510163)))) && a514396383 == 7) [L1719] EXPR (a1515611838 + 20) > a1515611838 ? 3 : 0 [L1719] a1515611838 += (a1515611838 + 20) > a1515611838 ? 3 : 0 [L1720] cf = 0 [L1721] a236788248 = (a182175502 - -3) [L1722] a471011792 = (a2061255735 - -3) [L1723] a1290652559 = (a471011792 - 6) [L1724] a1001390225 = ((((((a1001390225 * a552913881) % 14999) % 14927) - 15072) * 1) + 0) [L1725] a1879373572 = 33 [L1726] a2040628137 = ((a2061255735 * a471011792) - 47) [L1727] a268371874 = ((((((a268371874 * a552913881) % 14999) + -21018) * 10) / 9) * 1) [L1728] a412613099 = ((((a412613099 * a583510163) - -20983) + -23071) + -5970) [L1729] a1210734340 = ((((((a1210734340 * a274381288) % 14999) + -17041) * 10) / 9) * 1) [L1730] a2061255735 = (a2040628137 - 2) [L1731] a850881173 = ((((a850881173 * a583510163) * 1) + 1428) / -5) [L1732] a665096794 = (a835102539 + 5) [L1733] a1534902259 = 33 [L1734] a1422023390 = ((((((a552913881 * a552913881) % 14999) / 5) - -7907) % 83) - 127) [L1735] a2064844468 = 33 [L1736] a890181220 = 33 [L1737] a1171576990 = 33 [L1738] a835102539 = (a236788248 - 6) [L1796] RET calculate_outputm139(input) [L1798] COND FALSE !(((a1534902259 == 32 && (a1879373572 == 32 && ((28 < a268371874) && (76 >= a268371874)))) && ((a835102539 == 5 && (a1171576990 == 32 && (301 < a274381288 && cf==1 ))) && a890181220 == 32))) [L2414] RET calculate_outputm33(input) [L2417] COND TRUE (((( cf==1 && a471011792 == 11) && ((28 < a268371874) && (76 >= a268371874))) && a1171576990 == 32) && (a1534902259 == 32 && ((((17 < a1210734340) && (187 >= a1210734340)) && a2064844468 == 32) && a182175502 == 7))) [L2418] COND FALSE !(((((a2061255735 == 6 && ((((-146 < a1001390225) && (51 >= a1001390225)) && ( cf==1 && ((116 < a621522874) && (330 >= a621522874)))) && ((17 < a1210734340) && (187 >= a1210734340)))) && a2040628137 == 8) && ((37 < a850881173) && (184 >= a850881173))) && ((8 < a583510163) && (150 >= a583510163)))) [L2421] COND TRUE ((((37 < a850881173) && (184 >= a850881173)) && (a837448621 == 32 && (a835102539 == 5 && ( cf==1 && ((330 < a621522874) && (523 >= a621522874)))))) && (a2040628137 == 8 && (a1879373572 == 32 && ((28 < a268371874) && (76 >= a268371874))))) [L2422] CALL calculate_outputm36(input) [L1989] COND TRUE ((a890181220 == 32 && (a824024208 == 36 && cf==1 )) && ((a2064844468 == 32 && ((((-144 < a412613099) && (-18 >= a412613099)) && a2040628137 == 8) && a1290652559 == 4)) && a1879373572 == 32)) [L1990] CALL calculate_outputm150(input) [L1852] COND TRUE ((((((input == 10) && cf==1 ) && a1534902259 == 32) && a1171576990 == 32) && (((a837448621 == 32 && a2040628137 == 8) && ((8 < a583510163) && (150 >= a583510163))) && a1290652559 == 4)) && a487646776 == 34) [L1853] EXPR (a834109496 - 20) < a834109496 ? 4 : 0 [L1853] a834109496 -= (a834109496 - 20) < a834109496 ? 4 : 0 [L1854] cf = 0 [L1855] a1179664392 = 33 [L1856] a837448621 = 33 [L1857] a182175502 = (a835102539 + 1) [L1858] a471011792 = ((a665096794 - a835102539) + 2) [L1859] a1534902259 = 33 [L1860] a583510163 = ((((a583510163 * a1210734340) + -28092) - 173) * 1) [L1861] a2040628137 = ((a835102539 + a471011792) - 6) [L1862] a1605463015 = ((a2061255735 / a1290652559) - -7) [L1863] a2061255735 = (a182175502 + -1) [L1864] a1879373572 = 33 [L1865] a1171576990 = 33 [L1866] a665096794 = ((a182175502 + a182175502) - 2) [L1867] a268371874 = ((((a268371874 * a412613099) - 11284) - 1566) + 8370) [L1868] a1290652559 = (a2061255735 - 2) [L1869] a412613099 = (((((a412613099 * a621522874) % 14999) - 1243) + -6848) * 1) [L1870] a2064844468 = 33 [L1871] a835102539 = ((a2040628137 + a2040628137) + -10) [L1874] COND TRUE (((a2064844468 == 32 && (a665096794 == 11 && (a2061255735 == 6 && a890181220 == 32))) && (a835102539 == 5 && (((8 < a583510163) && (150 >= a583510163)) && ((input == 7) && cf==1 )))) && a1053339053 <= -42) [L1875] cf = 0 [L1876] a471011792 = ((a835102539 / a665096794) + 6) [L1877] a45685611 = (a835102539 - -8) [L1878] a2139179119 = (a45685611 + 3) [L1881] COND FALSE !(((((((a2064844468 == 32 && ( cf==1 && (input == 5))) && a1534902259 == 32) && ((28 < a268371874) && (76 >= a268371874))) && a2061255735 == 6) && (((37 < a850881173) && (184 >= a850881173)) && a665096794 == 11)) && a1425431969 <= -46)) [L1888] COND FALSE !((((a182175502 == 7 && (((-146 < a1001390225) && (51 >= a1001390225)) && ((input == 8) && cf==1 ))) && ((a1290652559 == 4 && (a1171576990 == 32 && a837448621 == 32)) && ((28 < a268371874) && (76 >= a268371874)))) && a416125995 == 28)) [L1896] COND TRUE (((a1534902259 == 32 && (( cf==1 && (input == 1)) && a890181220 == 32)) && (((((17 < a1210734340) && (187 >= a1210734340)) && a182175502 == 7) && a665096794 == 11) && ((37 < a850881173) && (184 >= a850881173)))) && a51415461 <= -39) [L1897] EXPR (a514396383 - 20) < a514396383 ? 3 : 0 [L1897] a514396383 -= (a514396383 - 20) < a514396383 ? 3 : 0 [L1898] cf = 0 [L1899] a1879373572 = 34 [L1900] a808219163 = 35 [L1901] a837448621 = 34 [L1902] a665096794 = (a2061255735 - -6) [L1903] a1001390225 = (((((((a1001390225 * a1210734340) * 1) % 48) + 99) * 5) % 48) + 73) [L1904] a890181220 = 34 [L1905] a182175502 = ((a665096794 - a835102539) - -1) [L1906] a1290652559 = ((a665096794 + a665096794) + -19) [L1907] a1171576990 = 34 [L1908] a2040628137 = (a665096794 - 3) [L1909] a583510163 = ((((((a583510163 * a268371874) * 2) + -273) + -10498) % 68) + 220) [L1910] a471011792 = (a2061255735 + 1) [L1911] a412613099 = ((((((a412613099 * a621522874) % 14999) / 5) % 26) - -8) + 3) [L1912] a418218587 = 33 [L1913] a1210734340 = (((((((a1210734340 * a268371874) % 17) + 188) + 14) * 5) % 17) - -199) [L1914] a2061255735 = ((a665096794 + a665096794) - 17) [L1917] COND FALSE !((((((input == 2) && cf==1 ) && ((28 < a268371874) && (76 >= a268371874))) && (((-146 < a1001390225) && (51 >= a1001390225)) && (((((17 < a1210734340) && (187 >= a1210734340)) && a890181220 == 32) && ((8 < a583510163) && (150 >= a583510163))) && a2040628137 == 8))) && a220097023 <= -31)) [L1936] COND TRUE ((((input == 3) && cf==1 ) && a837448621 == 32) && (a2040628137 == 8 && (((37 < a850881173) && (184 >= a850881173)) && (a1290652559 == 4 && (((-144 < a412613099) && (-18 >= a412613099)) && a890181220 == 32))))) [L1937] EXPR (a1716545843 - 20) < a1716545843 ? 4 : 0 [L1937] a1716545843 -= (a1716545843 - 20) < a1716545843 ? 4 : 0 [L1938] cf = 0 [L1939] a621522874 = ((((((a621522874 * a268371874) % 14999) / 5) + 22113) % 106) + 132) [L1940] a1684594625 = (((((a412613099 * a1001390225) % 65) + 40) - 27076) + 27076) [L1943] COND FALSE !((((a837448621 == 32 && a182175502 == 7) && ((a665096794 == 11 && ((((37 < a850881173) && (184 >= a850881173)) && ((input == 4) && cf==1 )) && a1171576990 == 32)) && a1534902259 == 32)) && a1498331231 == 55)) [L1963] COND FALSE !((((a1879373572 == 32 && ((((input == 6) && cf==1 ) && ((8 < a583510163) && (150 >= a583510163))) && a2040628137 == 8)) && (a890181220 == 32 && (((28 < a268371874) && (76 >= a268371874)) && ((-146 < a1001390225) && (51 >= a1001390225))))) && a1716545843 <= -72)) [L1969] COND TRUE (((((a1171576990 == 32 && ((28 < a268371874) && (76 >= a268371874))) && a1879373572 == 32) && ((-146 < a1001390225) && (51 >= a1001390225))) && (a2040628137 == 8 && (( cf==1 && (input == 9)) && a1534902259 == 32))) && a501521675 <= -53) [L1970] cf = 0 [L1971] a583510163 = (((((a583510163 * a1001390225) + -8022) - 76) + 7400) - 7346) [L1972] a1210734340 = ((((a1210734340 * a412613099) - 1668) / 5) * 5) [L1973] a1001390225 = (((((((a1001390225 * a1210734340) % 14999) % 14927) + -15072) + -1) + 6674) + -6673) [L1974] a44138666 = 32 [L1975] a837448621 = 33 [L1976] a1171576990 = 33 [L1977] a2061255735 = (a182175502 + -2) [L1978] a471011792 = ((a665096794 * a835102539) - 50) [L1979] a835102539 = (a471011792 + -1) [L1980] a1944090451 = 33 [L1981] a1879373572 = 33 [L1982] a268371874 = ((((a268371874 * a412613099) - 78) - 10989) * 1) [L1983] a665096794 = (a1290652559 + 6) [L1984] a850881173 = (((((a850881173 * a268371874) % 14999) - 14971) - 6) + -13) [L1990] RET calculate_outputm150(input) [L2422] RET calculate_outputm36(input) [L2425] COND FALSE !(((((8 < a583510163) && (150 >= a583510163)) && a1534902259 == 32) && (((a890181220 == 32 && (( cf==1 && a471011792 == 12) && ((28 < a268371874) && (76 >= a268371874)))) && a1290652559 == 4) && a1879373572 == 32))) [L2442] CALL errorCheck() [L387] COND TRUE ((a824024208 == 33 && ((330 < a621522874) && (523 >= a621522874))) && a471011792 == 11) [L388] cf = 0 [L389] CALL reach_error_0() [L15] CALL reach_error_b() [L14] reach_error() - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 312 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 170.0s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=312occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 167.3s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 235 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-19 14:21:04,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2018/Problem11.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs --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 940624650400628fbc547d76c7cce642a9063fb1576962b71733623b165f113e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:21:07,235 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:21:07,238 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:21:07,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:21:07,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:21:07,297 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:21:07,299 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:21:07,304 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:21:07,308 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:21:07,317 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:21:07,318 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:21:07,320 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:21:07,321 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:21:07,324 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:21:07,327 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:21:07,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:21:07,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:21:07,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:21:07,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:21:07,346 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:21:07,348 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:21:07,350 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:21:07,353 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:21:07,355 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:21:07,366 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:21:07,366 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:21:07,367 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:21:07,369 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:21:07,369 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:21:07,371 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:21:07,372 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:21:07,373 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:21:07,375 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:21:07,376 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:21:07,378 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:21:07,378 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:21:07,379 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:21:07,380 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:21:07,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:21:07,389 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:21:07,390 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:21:07,396 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:21:07,447 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:21:07,448 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:21:07,449 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:21:07,449 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:21:07,450 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:21:07,450 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:21:07,450 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:21:07,450 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:21:07,450 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:21:07,451 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:21:07,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:21:07,454 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:21:07,454 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:21:07,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:21:07,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:21:07,454 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:21:07,455 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:21:07,455 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:21:07,455 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:21:07,455 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:21:07,455 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:21:07,456 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:21:07,456 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:21:07,456 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:21:07,456 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:21:07,457 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:21:07,457 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:21:07,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:21:07,457 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:21:07,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:21:07,458 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:21:07,458 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:21:07,458 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:21:07,458 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:21:07,459 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:21:07,459 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:21:07,460 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 940624650400628fbc547d76c7cce642a9063fb1576962b71733623b165f113e [2021-11-19 14:21:07,901 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:21:07,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:21:07,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:21:07,942 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:21:07,943 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:21:07,945 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/eca-rers2018/Problem11.c [2021-11-19 14:21:08,027 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/data/6741a2baa/6e1113e0e4464d4ba6023c681df6154f/FLAG5cab0a105 [2021-11-19 14:21:08,945 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:21:08,946 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/sv-benchmarks/c/eca-rers2018/Problem11.c [2021-11-19 14:21:08,986 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/data/6741a2baa/6e1113e0e4464d4ba6023c681df6154f/FLAG5cab0a105 [2021-11-19 14:21:09,455 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/data/6741a2baa/6e1113e0e4464d4ba6023c681df6154f [2021-11-19 14:21:09,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:21:09,459 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:21:09,461 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:21:09,462 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:21:09,465 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:21:09,466 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:21:09" (1/1) ... [2021-11-19 14:21:09,467 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52b45ed8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:21:09, skipping insertion in model container [2021-11-19 14:21:09,468 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:21:09" (1/1) ... [2021-11-19 14:21:09,476 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:21:09,582 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:21:09,754 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/sv-benchmarks/c/eca-rers2018/Problem11.c[778,791] [2021-11-19 14:21:09,760 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/sv-benchmarks/c/eca-rers2018/Problem11.c[817,830] [2021-11-19 14:21:10,877 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:21:10,903 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:21:10,918 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/sv-benchmarks/c/eca-rers2018/Problem11.c[778,791] [2021-11-19 14:21:10,919 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/sv-benchmarks/c/eca-rers2018/Problem11.c[817,830] [2021-11-19 14:21:11,222 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:21:11,349 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:21:11,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:21:11 WrapperNode [2021-11-19 14:21:11,350 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:21:11,351 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:21:11,351 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:21:11,352 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:21:11,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:21:11" (1/1) ... [2021-11-19 14:21:11,449 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:21:11" (1/1) ... [2021-11-19 14:21:11,656 INFO L137 Inliner]: procedures = 286, calls = 252, calls flagged for inlining = 148, calls inlined = 148, statements flattened = 2259 [2021-11-19 14:21:11,656 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:21:11,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:21:11,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:21:11,658 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:21:11,668 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:21:11" (1/1) ... [2021-11-19 14:21:11,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:21:11" (1/1) ... [2021-11-19 14:21:11,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:21:11" (1/1) ... [2021-11-19 14:21:11,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:21:11" (1/1) ... [2021-11-19 14:21:11,758 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:21:11" (1/1) ... [2021-11-19 14:21:11,801 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:21:11" (1/1) ... [2021-11-19 14:21:11,822 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:21:11" (1/1) ... [2021-11-19 14:21:11,854 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:21:11,856 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:21:11,856 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:21:11,856 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:21:11,859 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:21:11" (1/1) ... [2021-11-19 14:21:11,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:21:11,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:21:11,898 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:21:11,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:21:11,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:21:11,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:21:11,976 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_a [2021-11-19 14:21:11,976 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_a [2021-11-19 14:21:11,976 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_b [2021-11-19 14:21:11,977 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_b [2021-11-19 14:21:11,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:21:11,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:21:12,249 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:21:12,251 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:21:48,444 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:21:48,462 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:21:48,462 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:21:48,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:21:48 BoogieIcfgContainer [2021-11-19 14:21:48,466 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:21:48,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:21:48,468 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:21:48,471 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:21:48,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:21:09" (1/3) ... [2021-11-19 14:21:48,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9f82b18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:21:48, skipping insertion in model container [2021-11-19 14:21:48,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:21:11" (2/3) ... [2021-11-19 14:21:48,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9f82b18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:21:48, skipping insertion in model container [2021-11-19 14:21:48,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:21:48" (3/3) ... [2021-11-19 14:21:48,475 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem11.c [2021-11-19 14:21:48,481 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:21:48,484 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-19 14:21:48,544 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:21:48,564 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 [2021-11-19 14:21:48,564 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-19 14:21:48,605 INFO L276 IsEmpty]: Start isEmpty. Operand has 705 states, 600 states have (on average 1.5866666666666667) internal successors, (952), 602 states have internal predecessors, (952), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-19 14:21:48,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-19 14:21:48,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:21:48,619 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:21:48,620 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:21:48,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:21:48,631 INFO L85 PathProgramCache]: Analyzing trace with hash -295136918, now seen corresponding path program 1 times [2021-11-19 14:21:48,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:21:48,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1453271519] [2021-11-19 14:21:48,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:21:48,645 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:21:48,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:21:48,648 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:21:48,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:21:48,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:21:48,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:21:48,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:21:50,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:21:50,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:21:51,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:21:51,327 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:21:51,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1453271519] [2021-11-19 14:21:51,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1453271519] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:21:51,328 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:21:51,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-19 14:21:51,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35518567] [2021-11-19 14:21:51,331 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:21:51,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:21:51,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:21:51,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:21:51,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:21:51,373 INFO L87 Difference]: Start difference. First operand has 705 states, 600 states have (on average 1.5866666666666667) internal successors, (952), 602 states have internal predecessors, (952), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:21:55,448 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:22:11,504 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:22:16,320 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:22:18,265 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:22:19,547 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:22:22,381 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:22:26,760 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:22:28,831 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:22:33,312 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:22:36,490 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:22:37,818 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:22:38,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:22:38,977 INFO L93 Difference]: Finished difference Result 1645 states and 2826 transitions. [2021-11-19 14:22:38,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:22:38,989 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-19 14:22:38,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:22:39,020 INFO L225 Difference]: With dead ends: 1645 [2021-11-19 14:22:39,021 INFO L226 Difference]: Without dead ends: 933 [2021-11-19 14:22:39,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:22:39,034 INFO L933 BasicCegarLoop]: 824 mSDtfsCounter, 389 mSDsluCounter, 1283 mSDsCounter, 0 mSdLazyCounter, 2078 mSolverCounterSat, 222 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 2107 SdHoareTripleChecker+Invalid, 2301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 2078 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:22:39,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 2107 Invalid, 2301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 2078 Invalid, 1 Unknown, 0 Unchecked, 47.4s Time] [2021-11-19 14:22:39,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2021-11-19 14:22:39,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 729. [2021-11-19 14:22:39,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 627 states have (on average 1.5789473684210527) internal successors, (990), 726 states have internal predecessors, (990), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:22:39,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 1090 transitions. [2021-11-19 14:22:39,140 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 1090 transitions. Word has length 16 [2021-11-19 14:22:39,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:22:39,140 INFO L470 AbstractCegarLoop]: Abstraction has 729 states and 1090 transitions. [2021-11-19 14:22:39,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:22:39,141 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 1090 transitions. [2021-11-19 14:22:39,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:22:39,143 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:22:39,144 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:22:39,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-19 14:22:39,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:22:39,357 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:22:39,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:22:39,359 INFO L85 PathProgramCache]: Analyzing trace with hash 733246357, now seen corresponding path program 1 times [2021-11-19 14:22:39,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:22:39,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [377295051] [2021-11-19 14:22:39,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:22:39,363 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:22:39,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:22:39,382 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:22:39,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:22:39,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:22:39,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:22:39,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:22:40,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:22:40,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:22:40,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:22:40,270 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:22:40,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [377295051] [2021-11-19 14:22:40,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [377295051] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:22:40,271 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:22:40,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-19 14:22:40,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900289718] [2021-11-19 14:22:40,272 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:22:40,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:22:40,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:22:40,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:22:40,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:22:40,276 INFO L87 Difference]: Start difference. First operand 729 states and 1090 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:22:45,056 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:22:47,573 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:22:51,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:22:51,075 INFO L93 Difference]: Finished difference Result 2811 states and 4202 transitions. [2021-11-19 14:22:51,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:22:51,108 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-19 14:22:51,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:22:51,124 INFO L225 Difference]: With dead ends: 2811 [2021-11-19 14:22:51,125 INFO L226 Difference]: Without dead ends: 2084 [2021-11-19 14:22:51,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:22:51,129 INFO L933 BasicCegarLoop]: 968 mSDtfsCounter, 2430 mSDsluCounter, 1628 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2430 SdHoareTripleChecker+Valid, 2596 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:22:51,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2430 Valid, 2596 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2021-11-19 14:22:51,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2021-11-19 14:22:51,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 1868. [2021-11-19 14:22:51,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1766 states have (on average 1.5685164212910532) internal successors, (2770), 1865 states have internal predecessors, (2770), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:22:51,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 2870 transitions. [2021-11-19 14:22:51,231 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 2870 transitions. Word has length 24 [2021-11-19 14:22:51,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:22:51,232 INFO L470 AbstractCegarLoop]: Abstraction has 1868 states and 2870 transitions. [2021-11-19 14:22:51,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:22:51,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 2870 transitions. [2021-11-19 14:22:51,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-19 14:22:51,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:22:51,235 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:22:51,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-19 14:22:51,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:22:51,451 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:22:51,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:22:51,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1255084462, now seen corresponding path program 1 times [2021-11-19 14:22:51,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:22:51,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2128988565] [2021-11-19 14:22:51,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:22:51,453 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:22:51,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:22:51,454 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:22:51,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:22:51,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:22:51,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:22:51,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:22:52,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:22:52,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:22:53,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:22:53,342 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:22:53,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2128988565] [2021-11-19 14:22:53,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2128988565] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:22:53,343 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:22:53,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-19 14:22:53,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539590949] [2021-11-19 14:22:53,344 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:22:53,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:22:53,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:22:53,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:22:53,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:22:53,346 INFO L87 Difference]: Start difference. First operand 1868 states and 2870 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:24:57,376 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:24:59,929 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:25:04,213 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:25:21,273 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:25:29,526 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:25:31,726 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:25:33,576 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:25:35,892 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:25:41,728 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:25:43,922 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:25:46,235 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:25:50,223 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:25:52,589 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:25:55,325 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:26:01,592 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:26:05,867 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:26:07,541 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:26:15,129 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:26:37,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:26:37,330 INFO L93 Difference]: Finished difference Result 15674 states and 25958 transitions. [2021-11-19 14:26:37,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 14:26:37,331 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-19 14:26:37,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:26:37,427 INFO L225 Difference]: With dead ends: 15674 [2021-11-19 14:26:37,427 INFO L226 Difference]: Without dead ends: 13808 [2021-11-19 14:26:37,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-11-19 14:26:37,457 INFO L933 BasicCegarLoop]: 2373 mSDtfsCounter, 5209 mSDsluCounter, 7205 mSDsCounter, 0 mSdLazyCounter, 8274 mSolverCounterSat, 950 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 193.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5209 SdHoareTripleChecker+Valid, 9578 SdHoareTripleChecker+Invalid, 9228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 950 IncrementalHoareTripleChecker+Valid, 8274 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 220.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:26:37,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5209 Valid, 9578 Invalid, 9228 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [950 Valid, 8274 Invalid, 4 Unknown, 0 Unchecked, 220.7s Time] [2021-11-19 14:26:37,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13808 states. [2021-11-19 14:26:37,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13808 to 8212. [2021-11-19 14:26:37,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8212 states, 8110 states have (on average 1.6029593094944512) internal successors, (13000), 8209 states have internal predecessors, (13000), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:26:37,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8212 states to 8212 states and 13100 transitions. [2021-11-19 14:26:37,975 INFO L78 Accepts]: Start accepts. Automaton has 8212 states and 13100 transitions. Word has length 25 [2021-11-19 14:26:37,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:26:37,976 INFO L470 AbstractCegarLoop]: Abstraction has 8212 states and 13100 transitions. [2021-11-19 14:26:37,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:26:37,976 INFO L276 IsEmpty]: Start isEmpty. Operand 8212 states and 13100 transitions. [2021-11-19 14:26:37,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-19 14:26:37,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:26:37,983 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:26:38,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:26:38,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:26:38,183 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:26:38,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:26:38,184 INFO L85 PathProgramCache]: Analyzing trace with hash 633226929, now seen corresponding path program 1 times [2021-11-19 14:26:38,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:26:38,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [369684193] [2021-11-19 14:26:38,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:38,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:26:38,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:26:38,188 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:26:38,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:26:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:38,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:26:38,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:38,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:26:38,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:26:39,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:26:39,136 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:26:39,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [369684193] [2021-11-19 14:26:39,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [369684193] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:26:39,137 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:26:39,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-19 14:26:39,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314776239] [2021-11-19 14:26:39,137 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:26:39,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:26:39,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:26:39,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:26:39,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:26:39,139 INFO L87 Difference]: Start difference. First operand 8212 states and 13100 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:26:46,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:26:46,562 INFO L93 Difference]: Finished difference Result 32072 states and 51141 transitions. [2021-11-19 14:26:46,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:26:46,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-19 14:26:46,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:26:46,744 INFO L225 Difference]: With dead ends: 32072 [2021-11-19 14:26:46,745 INFO L226 Difference]: Without dead ends: 23862 [2021-11-19 14:26:46,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:26:46,760 INFO L933 BasicCegarLoop]: 947 mSDtfsCounter, 1803 mSDsluCounter, 2529 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1803 SdHoareTripleChecker+Valid, 3476 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:26:46,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1803 Valid, 3476 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2021-11-19 14:26:46,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23862 states. [2021-11-19 14:26:47,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23862 to 15285. [2021-11-19 14:26:47,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15285 states, 15183 states have (on average 1.603372192583811) internal successors, (24344), 15282 states have internal predecessors, (24344), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:26:47,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15285 states to 15285 states and 24444 transitions. [2021-11-19 14:26:47,749 INFO L78 Accepts]: Start accepts. Automaton has 15285 states and 24444 transitions. Word has length 26 [2021-11-19 14:26:47,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:26:47,753 INFO L470 AbstractCegarLoop]: Abstraction has 15285 states and 24444 transitions. [2021-11-19 14:26:47,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:26:47,754 INFO L276 IsEmpty]: Start isEmpty. Operand 15285 states and 24444 transitions. [2021-11-19 14:26:47,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-19 14:26:47,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:26:47,756 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:26:47,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:26:47,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:26:47,983 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:26:47,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:26:47,984 INFO L85 PathProgramCache]: Analyzing trace with hash 2042056115, now seen corresponding path program 1 times [2021-11-19 14:26:47,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:26:47,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703389224] [2021-11-19 14:26:47,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:47,985 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:26:47,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:26:47,986 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:26:47,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:26:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:48,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:26:48,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:48,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:26:48,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:26:49,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:26:49,008 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:26:49,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703389224] [2021-11-19 14:26:49,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703389224] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:26:49,009 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:26:49,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:26:49,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320076402] [2021-11-19 14:26:49,010 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:26:49,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:26:49,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:26:49,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:26:49,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:26:49,012 INFO L87 Difference]: Start difference. First operand 15285 states and 24444 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:26:53,792 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:26:56,472 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:26:57,750 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:27:00,252 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:27:01,877 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:27:04,258 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:27:05,547 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:27:08,907 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:27:09,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:09,256 INFO L93 Difference]: Finished difference Result 44586 states and 73804 transitions. [2021-11-19 14:27:09,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:27:09,256 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-19 14:27:09,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:09,331 INFO L225 Difference]: With dead ends: 44586 [2021-11-19 14:27:09,332 INFO L226 Difference]: Without dead ends: 29303 [2021-11-19 14:27:09,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:27:09,350 INFO L933 BasicCegarLoop]: 1172 mSDtfsCounter, 1653 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 180 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1653 SdHoareTripleChecker+Valid, 2318 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:09,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1653 Valid, 2318 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 260 Invalid, 2 Unknown, 0 Unchecked, 19.9s Time] [2021-11-19 14:27:09,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29303 states. [2021-11-19 14:27:09,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29303 to 25664. [2021-11-19 14:27:09,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25664 states, 25562 states have (on average 1.6517486894609186) internal successors, (42222), 25661 states have internal predecessors, (42222), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:27:10,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25664 states to 25664 states and 42322 transitions. [2021-11-19 14:27:10,116 INFO L78 Accepts]: Start accepts. Automaton has 25664 states and 42322 transitions. Word has length 27 [2021-11-19 14:27:10,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:10,116 INFO L470 AbstractCegarLoop]: Abstraction has 25664 states and 42322 transitions. [2021-11-19 14:27:10,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:27:10,117 INFO L276 IsEmpty]: Start isEmpty. Operand 25664 states and 42322 transitions. [2021-11-19 14:27:10,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-19 14:27:10,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:10,118 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:27:10,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-19 14:27:10,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:27:10,319 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:10,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:10,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1455250101, now seen corresponding path program 1 times [2021-11-19 14:27:10,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:10,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1544168303] [2021-11-19 14:27:10,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:10,321 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:10,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:10,339 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:10,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:27:10,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:10,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:27:10,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:11,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:27:11,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:11,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:27:11,584 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:11,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1544168303] [2021-11-19 14:27:11,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1544168303] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:27:11,585 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:27:11,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 14:27:11,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318964395] [2021-11-19 14:27:11,585 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:11,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:27:11,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:11,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:27:11,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:27:11,587 INFO L87 Difference]: Start difference. First operand 25664 states and 42322 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:27:45,098 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:27:49,601 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:27:52,760 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:27:59,708 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:28:02,866 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:28:12,088 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:28:14,519 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:28:22,168 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:28:23,514 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:28:27,375 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:28:31,831 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:28:36,160 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:28:38,000 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:28:42,382 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:28:47,801 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:28:49,816 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:28:52,235 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:28:53,615 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:28:57,372 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:29:18,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:18,379 INFO L93 Difference]: Finished difference Result 179270 states and 307754 transitions. [2021-11-19 14:29:18,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 14:29:18,380 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-19 14:29:18,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:19,153 INFO L225 Difference]: With dead ends: 179270 [2021-11-19 14:29:19,153 INFO L226 Difference]: Without dead ends: 153608 [2021-11-19 14:29:19,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:29:19,218 INFO L933 BasicCegarLoop]: 1430 mSDtfsCounter, 7671 mSDsluCounter, 3396 mSDsCounter, 0 mSdLazyCounter, 5687 mSolverCounterSat, 1509 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 115.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7671 SdHoareTripleChecker+Valid, 4826 SdHoareTripleChecker+Invalid, 7199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1509 IncrementalHoareTripleChecker+Valid, 5687 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 124.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:19,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7671 Valid, 4826 Invalid, 7199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1509 Valid, 5687 Invalid, 3 Unknown, 0 Unchecked, 124.3s Time] [2021-11-19 14:29:19,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153608 states. [2021-11-19 14:29:21,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153608 to 50809. [2021-11-19 14:29:21,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50809 states, 50707 states have (on average 1.7118938213658863) internal successors, (86805), 50806 states have internal predecessors, (86805), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:29:21,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50809 states to 50809 states and 86905 transitions. [2021-11-19 14:29:21,482 INFO L78 Accepts]: Start accepts. Automaton has 50809 states and 86905 transitions. Word has length 27 [2021-11-19 14:29:21,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:21,483 INFO L470 AbstractCegarLoop]: Abstraction has 50809 states and 86905 transitions. [2021-11-19 14:29:21,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:29:21,483 INFO L276 IsEmpty]: Start isEmpty. Operand 50809 states and 86905 transitions. [2021-11-19 14:29:21,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-19 14:29:21,488 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:21,488 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:29:21,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-19 14:29:21,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:29:21,704 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:21,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:21,704 INFO L85 PathProgramCache]: Analyzing trace with hash -2132596368, now seen corresponding path program 1 times [2021-11-19 14:29:21,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:21,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [325733848] [2021-11-19 14:29:21,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:21,705 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:21,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:21,706 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:21,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:29:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:22,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:29:22,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:22,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:29:22,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:22,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:29:22,462 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:22,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [325733848] [2021-11-19 14:29:22,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [325733848] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:22,463 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:22,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:29:22,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936744589] [2021-11-19 14:29:22,463 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:22,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:29:22,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:22,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:29:22,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:29:22,464 INFO L87 Difference]: Start difference. First operand 50809 states and 86905 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:29:24,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:24,800 INFO L93 Difference]: Finished difference Result 151793 states and 259755 transitions. [2021-11-19 14:29:24,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:29:24,801 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-19 14:29:24,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:25,130 INFO L225 Difference]: With dead ends: 151793 [2021-11-19 14:29:25,130 INFO L226 Difference]: Without dead ends: 151787 [2021-11-19 14:29:25,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:29:25,156 INFO L933 BasicCegarLoop]: 963 mSDtfsCounter, 1830 mSDsluCounter, 1824 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1830 SdHoareTripleChecker+Valid, 2787 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:25,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1830 Valid, 2787 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 14:29:25,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151787 states. [2021-11-19 14:29:27,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151787 to 150959. [2021-11-19 14:29:27,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150959 states, 150857 states have (on average 1.709068853284899) internal successors, (257825), 150956 states have internal predecessors, (257825), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:29:28,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150959 states to 150959 states and 257925 transitions. [2021-11-19 14:29:28,724 INFO L78 Accepts]: Start accepts. Automaton has 150959 states and 257925 transitions. Word has length 28 [2021-11-19 14:29:28,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:28,725 INFO L470 AbstractCegarLoop]: Abstraction has 150959 states and 257925 transitions. [2021-11-19 14:29:28,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:29:28,725 INFO L276 IsEmpty]: Start isEmpty. Operand 150959 states and 257925 transitions. [2021-11-19 14:29:28,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 14:29:28,726 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:28,727 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:29:28,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:28,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:29:28,928 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:28,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:28,928 INFO L85 PathProgramCache]: Analyzing trace with hash 311668332, now seen corresponding path program 1 times [2021-11-19 14:29:28,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:28,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1136486654] [2021-11-19 14:29:28,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:28,930 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:28,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:28,931 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:28,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:29:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:29,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:29:29,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:29,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:29:29,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:29,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:29:29,641 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:29,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1136486654] [2021-11-19 14:29:29,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1136486654] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:29,641 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:29,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-19 14:29:29,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648911370] [2021-11-19 14:29:29,642 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:29,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:29:29,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:29,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:29:29,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:29:29,643 INFO L87 Difference]: Start difference. First operand 150959 states and 257925 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:29:35,146 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:29:38,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:38,690 INFO L93 Difference]: Finished difference Result 599939 states and 1025463 transitions. [2021-11-19 14:29:38,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:29:38,691 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-19 14:29:38,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:39,859 INFO L225 Difference]: With dead ends: 599939 [2021-11-19 14:29:39,859 INFO L226 Difference]: Without dead ends: 448982 [2021-11-19 14:29:39,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:29:39,941 INFO L933 BasicCegarLoop]: 938 mSDtfsCounter, 2545 mSDsluCounter, 1713 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2545 SdHoareTripleChecker+Valid, 2651 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:39,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2545 Valid, 2651 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-11-19 14:29:40,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448982 states. [2021-11-19 14:29:45,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448982 to 297900. [2021-11-19 14:29:45,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297900 states, 297798 states have (on average 1.7117744242741724) internal successors, (509763), 297897 states have internal predecessors, (509763), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:29:46,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297900 states to 297900 states and 509863 transitions. [2021-11-19 14:29:46,666 INFO L78 Accepts]: Start accepts. Automaton has 297900 states and 509863 transitions. Word has length 30 [2021-11-19 14:29:46,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:46,666 INFO L470 AbstractCegarLoop]: Abstraction has 297900 states and 509863 transitions. [2021-11-19 14:29:46,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:29:46,667 INFO L276 IsEmpty]: Start isEmpty. Operand 297900 states and 509863 transitions. [2021-11-19 14:29:46,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-19 14:29:46,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:46,667 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:29:46,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:46,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:29:46,875 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:46,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:46,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1764627203, now seen corresponding path program 1 times [2021-11-19 14:29:46,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:46,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1115764194] [2021-11-19 14:29:46,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:46,876 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:46,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:46,878 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:46,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1164fe4-320e-42c7-bdea-9ae128fdb85a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:29:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:48,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:29:48,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:48,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:29:48,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:48,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:29:48,712 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:48,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1115764194] [2021-11-19 14:29:48,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1115764194] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:48,712 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:48,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-19 14:29:48,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498091888] [2021-11-19 14:29:48,712 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:48,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:29:48,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:48,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:29:48,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:29:48,714 INFO L87 Difference]: Start difference. First operand 297900 states and 509863 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:29:51,913 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:29:57,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:57,735 INFO L93 Difference]: Finished difference Result 888164 states and 1520209 transitions. [2021-11-19 14:29:57,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:29:57,735 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-19 14:29:57,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:59,743 INFO L225 Difference]: With dead ends: 888164 [2021-11-19 14:29:59,743 INFO L226 Difference]: Without dead ends: 888157 [2021-11-19 14:29:59,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:29:59,844 INFO L933 BasicCegarLoop]: 938 mSDtfsCounter, 1811 mSDsluCounter, 2683 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1811 SdHoareTripleChecker+Valid, 3621 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:59,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1811 Valid, 3621 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-19 14:30:00,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888157 states.