./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/duplets.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0683d3c6-1939-4f81-9596-6dd31288922e/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0683d3c6-1939-4f81-9596-6dd31288922e/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0683d3c6-1939-4f81-9596-6dd31288922e/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0683d3c6-1939-4f81-9596-6dd31288922e/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/duplets.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0683d3c6-1939-4f81-9596-6dd31288922e/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0683d3c6-1939-4f81-9596-6dd31288922e/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:54:27,916 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:54:27,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:54:27,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:54:27,962 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:54:27,963 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:54:27,965 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:54:27,968 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:54:27,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:54:27,972 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:54:27,974 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:54:27,976 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:54:27,977 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:54:27,978 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:54:27,980 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:54:27,982 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:54:27,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:54:27,985 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:54:27,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:54:27,990 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:54:27,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:54:27,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:54:27,997 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:54:27,998 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:54:28,005 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:54:28,005 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:54:28,006 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:54:28,007 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:54:28,008 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:54:28,009 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:54:28,010 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:54:28,011 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:54:28,021 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:54:28,023 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:54:28,025 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:54:28,025 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:54:28,026 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:54:28,026 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:54:28,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:54:28,028 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:54:28,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:54:28,029 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0683d3c6-1939-4f81-9596-6dd31288922e/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-21 01:54:28,088 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:54:28,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:54:28,089 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:54:28,089 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:54:28,090 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:54:28,090 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:54:28,090 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:54:28,091 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:54:28,091 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:54:28,091 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:54:28,099 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:54:28,099 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:54:28,099 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:54:28,099 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:54:28,100 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:54:28,100 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:54:28,100 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:54:28,100 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:54:28,101 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-21 01:54:28,103 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-21 01:54:28,104 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:54:28,105 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:54:28,111 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 01:54:28,111 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:54:28,111 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:54:28,112 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:54:28,112 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-21 01:54:28,112 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-21 01:54:28,112 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-21 01:54:28,113 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:54:28,113 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-21 01:54:28,113 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:54:28,113 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:54:28,114 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:54:28,114 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:54:28,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:54:28,115 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:54:28,115 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:54:28,119 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:54:28,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:54:28,119 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:54:28,119 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:54:28,120 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_0683d3c6-1939-4f81-9596-6dd31288922e/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0683d3c6-1939-4f81-9596-6dd31288922e/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 [2021-11-21 01:54:28,511 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:54:28,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:54:28,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:54:28,557 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:54:28,560 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:54:28,561 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0683d3c6-1939-4f81-9596-6dd31288922e/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/verifythis/duplets.c [2021-11-21 01:54:28,651 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0683d3c6-1939-4f81-9596-6dd31288922e/bin/utaipan-TEXQjIfE4P/data/01f7f7bb3/926a426313764e52b4f15eb10d79aa7d/FLAGa3ddba2fe [2021-11-21 01:54:29,295 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:54:29,299 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0683d3c6-1939-4f81-9596-6dd31288922e/sv-benchmarks/c/verifythis/duplets.c [2021-11-21 01:54:29,315 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0683d3c6-1939-4f81-9596-6dd31288922e/bin/utaipan-TEXQjIfE4P/data/01f7f7bb3/926a426313764e52b4f15eb10d79aa7d/FLAGa3ddba2fe [2021-11-21 01:54:29,632 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0683d3c6-1939-4f81-9596-6dd31288922e/bin/utaipan-TEXQjIfE4P/data/01f7f7bb3/926a426313764e52b4f15eb10d79aa7d [2021-11-21 01:54:29,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:54:29,637 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:54:29,639 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:54:29,639 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:54:29,644 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:54:29,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:54:29" (1/1) ... [2021-11-21 01:54:29,648 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@698615ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:54:29, skipping insertion in model container [2021-11-21 01:54:29,649 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:54:29" (1/1) ... [2021-11-21 01:54:29,658 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:54:29,688 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:54:29,888 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_0683d3c6-1939-4f81-9596-6dd31288922e/sv-benchmarks/c/verifythis/duplets.c[485,498] [2021-11-21 01:54:29,916 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:54:29,931 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:54:29,946 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_0683d3c6-1939-4f81-9596-6dd31288922e/sv-benchmarks/c/verifythis/duplets.c[485,498] [2021-11-21 01:54:29,965 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:54:29,983 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:54:29,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:54:29 WrapperNode [2021-11-21 01:54:29,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:54:29,986 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:54:29,986 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:54:29,986 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:54:29,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:54:29" (1/1) ... [2021-11-21 01:54:30,021 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:54:29" (1/1) ... [2021-11-21 01:54:30,067 INFO L137 Inliner]: procedures = 21, calls = 43, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 123 [2021-11-21 01:54:30,068 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:54:30,068 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:54:30,069 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:54:30,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:54:30,081 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:54:29" (1/1) ... [2021-11-21 01:54:30,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:54:29" (1/1) ... [2021-11-21 01:54:30,096 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:54:29" (1/1) ... [2021-11-21 01:54:30,096 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:54:29" (1/1) ... [2021-11-21 01:54:30,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:54:29" (1/1) ... [2021-11-21 01:54:30,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:54:29" (1/1) ... [2021-11-21 01:54:30,124 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:54:29" (1/1) ... [2021-11-21 01:54:30,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:54:30,129 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:54:30,130 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:54:30,130 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:54:30,131 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:54:29" (1/1) ... [2021-11-21 01:54:30,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:54:30,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0683d3c6-1939-4f81-9596-6dd31288922e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:54:30,166 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0683d3c6-1939-4f81-9596-6dd31288922e/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:54:30,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0683d3c6-1939-4f81-9596-6dd31288922e/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:54:30,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:54:30,224 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 01:54:30,224 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 01:54:30,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:54:30,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:54:30,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:54:30,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:54:30,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:54:30,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:54:30,225 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:54:30,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 01:54:30,225 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 01:54:30,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:54:30,372 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:54:30,374 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:54:30,814 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:54:30,869 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:54:30,882 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 01:54:30,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:54:30 BoogieIcfgContainer [2021-11-21 01:54:30,886 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:54:30,888 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:54:30,888 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:54:30,893 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:54:30,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:54:29" (1/3) ... [2021-11-21 01:54:30,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e8f3c1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:54:30, skipping insertion in model container [2021-11-21 01:54:30,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:54:29" (2/3) ... [2021-11-21 01:54:30,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e8f3c1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:54:30, skipping insertion in model container [2021-11-21 01:54:30,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:54:30" (3/3) ... [2021-11-21 01:54:30,911 INFO L111 eAbstractionObserver]: Analyzing ICFG duplets.c [2021-11-21 01:54:30,917 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:54:30,918 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 37 error locations. [2021-11-21 01:54:31,011 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:54:31,020 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-11-21 01:54:31,020 INFO L340 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2021-11-21 01:54:31,040 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 75 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-21 01:54:31,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-21 01:54:31,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:54:31,051 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:54:31,051 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-11-21 01:54:31,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:54:31,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1311551543, now seen corresponding path program 1 times [2021-11-21 01:54:31,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:54:31,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311295901] [2021-11-21 01:54:31,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:54:31,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:54:31,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:54:31,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:54:31,420 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:54:31,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311295901] [2021-11-21 01:54:31,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311295901] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:54:31,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:54:31,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:54:31,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867006330] [2021-11-21 01:54:31,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:54:31,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:54:31,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:54:31,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:54:31,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:54:31,473 INFO L87 Difference]: Start difference. First operand has 87 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 75 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-21 01:54:31,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:54:31,669 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2021-11-21 01:54:31,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:54:31,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 16 [2021-11-21 01:54:31,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:54:31,701 INFO L225 Difference]: With dead ends: 85 [2021-11-21 01:54:31,701 INFO L226 Difference]: Without dead ends: 84 [2021-11-21 01:54:31,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:54:31,708 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 65 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:54:31,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 62 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:54:31,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-21 01:54:31,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-11-21 01:54:31,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 38 states have (on average 2.026315789473684) internal successors, (77), 72 states have internal predecessors, (77), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-21 01:54:31,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2021-11-21 01:54:31,759 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 16 [2021-11-21 01:54:31,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:54:31,761 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2021-11-21 01:54:31,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-21 01:54:31,762 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2021-11-21 01:54:31,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-21 01:54:31,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:54:31,764 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:54:31,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:54:31,764 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-11-21 01:54:31,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:54:31,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1311551544, now seen corresponding path program 1 times [2021-11-21 01:54:31,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:54:31,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870916666] [2021-11-21 01:54:31,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:54:31,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:54:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:54:31,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:54:31,909 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:54:31,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870916666] [2021-11-21 01:54:31,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870916666] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:54:31,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822554616] [2021-11-21 01:54:31,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:54:31,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:54:31,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0683d3c6-1939-4f81-9596-6dd31288922e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:54:31,929 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0683d3c6-1939-4f81-9596-6dd31288922e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:54:31,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0683d3c6-1939-4f81-9596-6dd31288922e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:54:32,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:54:32,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-21 01:54:32,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:54:32,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-11-21 01:54:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:54:32,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:54:34,123 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:54:34,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822554616] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:54:34,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [710343105] [2021-11-21 01:54:34,164 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-21 01:54:34,164 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:54:34,172 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:54:34,179 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:54:34,180 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:54:34,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:34,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2021-11-21 01:54:34,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:34,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:34,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:34,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-21 01:54:34,845 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-11-21 01:54:34,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 88 treesize of output 101 [2021-11-21 01:54:35,608 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-11-21 01:54:35,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 88 treesize of output 101 [2021-11-21 01:54:36,467 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-11-21 01:54:36,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 98 treesize of output 111 [2021-11-21 01:54:37,185 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-11-21 01:54:37,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 98 treesize of output 111 [2021-11-21 01:54:37,876 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-11-21 01:54:37,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 102 treesize of output 115 [2021-11-21 01:54:38,655 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-11-21 01:54:38,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 102 treesize of output 115 [2021-11-21 01:54:39,807 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-11-21 01:54:39,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 102 treesize of output 115 [2021-11-21 01:54:40,245 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-11-21 01:54:40,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 98 treesize of output 111 [2021-11-21 01:54:40,515 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-11-21 01:54:40,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 88 treesize of output 101 [2021-11-21 01:54:40,938 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 10 for LOIs [2021-11-21 01:54:40,956 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:54:42,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [710343105] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:54:42,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:54:42,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [4, 6, 4] total 20 [2021-11-21 01:54:42,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732146371] [2021-11-21 01:54:42,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:54:42,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 01:54:42,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:54:42,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 01:54:42,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:54:42,410 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand has 11 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 01:54:42,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:54:42,961 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2021-11-21 01:54:42,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:54:42,968 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 16 [2021-11-21 01:54:42,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:54:42,970 INFO L225 Difference]: With dead ends: 83 [2021-11-21 01:54:42,970 INFO L226 Difference]: Without dead ends: 83 [2021-11-21 01:54:42,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:54:42,972 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 85 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:54:42,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 210 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:54:42,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-21 01:54:42,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-11-21 01:54:42,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 38 states have (on average 2.0) internal successors, (76), 71 states have internal predecessors, (76), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-21 01:54:42,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2021-11-21 01:54:42,985 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 16 [2021-11-21 01:54:42,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:54:42,986 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2021-11-21 01:54:42,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 01:54:42,986 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2021-11-21 01:54:42,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-21 01:54:42,987 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:54:42,987 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:54:43,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0683d3c6-1939-4f81-9596-6dd31288922e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:54:43,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0683d3c6-1939-4f81-9596-6dd31288922e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:54:43,196 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-11-21 01:54:43,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:54:43,197 INFO L85 PathProgramCache]: Analyzing trace with hash 2003392154, now seen corresponding path program 1 times [2021-11-21 01:54:43,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:54:43,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979516454] [2021-11-21 01:54:43,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:54:43,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:54:43,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:54:43,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:54:43,328 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:54:43,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979516454] [2021-11-21 01:54:43,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979516454] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:54:43,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104061396] [2021-11-21 01:54:43,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:54:43,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:54:43,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0683d3c6-1939-4f81-9596-6dd31288922e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:54:43,340 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0683d3c6-1939-4f81-9596-6dd31288922e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:54:43,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0683d3c6-1939-4f81-9596-6dd31288922e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:54:43,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:54:43,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-21 01:54:43,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:54:43,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-11-21 01:54:43,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:54:43,725 INFO L328 TraceCheckSpWp]: Computing backward predicates...