./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-3.i --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_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/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_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/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_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/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 f41a78d87834195eab5eb2e1b786d665ee0f261c86aa89f4e0ae15aff9e9d1ee --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:00:43,826 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:00:43,829 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:00:43,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:00:43,890 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:00:43,895 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:00:43,896 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:00:43,900 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:00:43,903 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:00:43,910 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:00:43,911 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:00:43,913 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:00:43,913 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:00:43,916 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:00:43,919 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:00:43,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:00:43,925 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:00:43,926 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:00:43,928 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:00:43,935 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:00:43,937 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:00:43,939 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:00:43,942 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:00:43,943 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:00:43,948 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:00:43,949 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:00:43,949 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:00:43,951 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:00:43,952 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:00:43,953 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:00:43,953 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:00:43,954 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:00:43,956 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:00:43,957 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:00:43,959 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:00:43,959 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:00:43,960 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:00:43,960 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:00:43,960 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:00:43,961 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:00:43,961 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:00:43,962 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:00:44,005 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:00:44,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:00:44,007 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:00:44,007 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:00:44,007 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:00:44,008 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:00:44,008 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:00:44,008 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:00:44,008 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:00:44,008 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:00:44,009 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:00:44,010 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:00:44,010 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:00:44,010 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:00:44,010 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:00:44,011 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:00:44,011 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:00:44,012 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:00:44,012 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:00:44,012 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:00:44,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:00:44,012 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:00:44,013 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:00:44,013 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:00:44,013 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:00:44,013 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:00:44,013 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:00:44,014 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:00:44,014 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:00:44,016 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:00:44,016 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:00:44,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:00:44,016 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:00:44,017 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:00:44,017 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:00:44,017 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:00:44,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:00:44,017 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:00:44,018 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:00:44,018 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:00:44,018 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_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f41a78d87834195eab5eb2e1b786d665ee0f261c86aa89f4e0ae15aff9e9d1ee [2021-11-19 14:00:44,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:00:44,356 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:00:44,359 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:00:44,360 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:00:44,361 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:00:44,362 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-3.i [2021-11-19 14:00:44,433 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/data/8bd9a517e/e8828653c80d4054b067a369d3edb38e/FLAG7b45d07cb [2021-11-19 14:00:45,012 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:00:45,013 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-3.i [2021-11-19 14:00:45,052 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/data/8bd9a517e/e8828653c80d4054b067a369d3edb38e/FLAG7b45d07cb [2021-11-19 14:00:45,240 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/data/8bd9a517e/e8828653c80d4054b067a369d3edb38e [2021-11-19 14:00:45,243 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:00:45,244 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:00:45,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:00:45,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:00:45,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:00:45,250 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:00:45" (1/1) ... [2021-11-19 14:00:45,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f4a39b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:45, skipping insertion in model container [2021-11-19 14:00:45,251 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:00:45" (1/1) ... [2021-11-19 14:00:45,258 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:00:45,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:00:45,755 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_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-3.i[33021,33034] [2021-11-19 14:00:45,985 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:00:45,996 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 14:00:45,998 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@360fbd75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:45, skipping insertion in model container [2021-11-19 14:00:45,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:00:45,999 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:00:46,002 INFO L158 Benchmark]: Toolchain (without parser) took 755.96ms. Allocated memory was 109.1MB in the beginning and 144.7MB in the end (delta: 35.7MB). Free memory was 74.1MB in the beginning and 106.2MB in the end (delta: -32.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 14:00:46,003 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 109.1MB. Free memory is still 64.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:00:46,005 INFO L158 Benchmark]: CACSL2BoogieTranslator took 753.30ms. Allocated memory was 109.1MB in the beginning and 144.7MB in the end (delta: 35.7MB). Free memory was 74.1MB in the beginning and 106.2MB in the end (delta: -32.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 14:00:46,007 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 109.1MB. Free memory is still 64.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 753.30ms. Allocated memory was 109.1MB in the beginning and 144.7MB in the end (delta: 35.7MB). Free memory was 74.1MB in the beginning and 106.2MB in the end (delta: -32.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 752]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. 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_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/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_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/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_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/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 f41a78d87834195eab5eb2e1b786d665ee0f261c86aa89f4e0ae15aff9e9d1ee --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:00:48,178 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:00:48,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:00:48,240 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:00:48,240 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:00:48,246 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:00:48,248 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:00:48,252 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:00:48,256 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:00:48,266 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:00:48,268 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:00:48,270 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:00:48,270 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:00:48,273 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:00:48,276 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:00:48,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:00:48,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:00:48,284 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:00:48,286 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:00:48,293 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:00:48,297 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:00:48,299 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:00:48,302 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:00:48,304 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:00:48,311 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:00:48,312 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:00:48,312 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:00:48,314 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:00:48,315 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:00:48,316 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:00:48,317 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:00:48,317 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:00:48,319 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:00:48,320 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:00:48,322 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:00:48,322 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:00:48,323 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:00:48,324 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:00:48,341 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:00:48,343 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:00:48,344 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:00:48,345 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:00:48,389 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:00:48,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:00:48,391 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:00:48,391 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:00:48,392 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:00:48,392 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:00:48,392 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:00:48,392 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:00:48,393 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:00:48,393 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:00:48,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:00:48,396 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:00:48,396 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:00:48,396 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:00:48,396 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:00:48,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:00:48,397 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:00:48,397 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:00:48,397 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:00:48,398 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:00:48,398 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:00:48,398 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:00:48,398 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:00:48,399 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:00:48,399 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:00:48,399 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:00:48,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:00:48,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:00:48,400 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:00:48,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:00:48,400 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:00:48,401 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:00:48,401 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:00:48,401 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:00:48,402 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:00:48,402 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:00:48,402 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_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f41a78d87834195eab5eb2e1b786d665ee0f261c86aa89f4e0ae15aff9e9d1ee [2021-11-19 14:00:48,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:00:48,782 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:00:48,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:00:48,786 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:00:48,786 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:00:48,788 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-3.i [2021-11-19 14:00:48,865 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/data/edab0b93f/4fea4af9e0744dea9959001ffee1e4ab/FLAG07f82fec1 [2021-11-19 14:00:49,558 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:00:49,558 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-3.i [2021-11-19 14:00:49,580 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/data/edab0b93f/4fea4af9e0744dea9959001ffee1e4ab/FLAG07f82fec1 [2021-11-19 14:00:49,810 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/data/edab0b93f/4fea4af9e0744dea9959001ffee1e4ab [2021-11-19 14:00:49,827 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:00:49,828 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:00:49,829 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:00:49,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:00:49,833 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:00:49,834 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:00:49" (1/1) ... [2021-11-19 14:00:49,835 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26805de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:49, skipping insertion in model container [2021-11-19 14:00:49,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:00:49" (1/1) ... [2021-11-19 14:00:49,842 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:00:49,931 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:00:50,355 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_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-3.i[33021,33034] [2021-11-19 14:00:50,563 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:00:50,575 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:00:50,590 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:00:50,609 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_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-3.i[33021,33034] [2021-11-19 14:00:50,710 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:00:50,715 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:00:50,749 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_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-3.i[33021,33034] [2021-11-19 14:00:50,805 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:00:50,854 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:00:50,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:50 WrapperNode [2021-11-19 14:00:50,854 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:00:50,855 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:00:50,856 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:00:50,856 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:00:50,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:50" (1/1) ... [2021-11-19 14:00:50,906 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:50" (1/1) ... [2021-11-19 14:00:50,976 INFO L137 Inliner]: procedures = 180, calls = 448, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1446 [2021-11-19 14:00:50,976 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:00:50,977 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:00:50,977 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:00:50,977 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:00:50,986 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:50" (1/1) ... [2021-11-19 14:00:50,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:50" (1/1) ... [2021-11-19 14:00:51,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:50" (1/1) ... [2021-11-19 14:00:51,021 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:50" (1/1) ... [2021-11-19 14:00:51,108 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:50" (1/1) ... [2021-11-19 14:00:51,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:50" (1/1) ... [2021-11-19 14:00:51,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:50" (1/1) ... [2021-11-19 14:00:51,161 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:00:51,162 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:00:51,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:00:51,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:00:51,163 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:50" (1/1) ... [2021-11-19 14:00:51,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:00:51,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:00:51,206 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:00:51,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:00:51,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 14:00:51,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 14:00:51,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 14:00:51,260 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 14:00:51,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-19 14:00:51,260 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-19 14:00:51,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 14:00:51,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:00:51,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:00:51,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 14:00:51,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 14:00:51,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:00:51,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 14:00:51,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:00:51,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:00:51,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:00:51,604 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:00:51,606 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:01:01,479 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:01:01,488 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:01:01,488 INFO L301 CfgBuilder]: Removed 77 assume(true) statements. [2021-11-19 14:01:01,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:01:01 BoogieIcfgContainer [2021-11-19 14:01:01,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:01:01,493 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:01:01,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:01:01,496 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:01:01,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:00:49" (1/3) ... [2021-11-19 14:01:01,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a5a1bb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:01:01, skipping insertion in model container [2021-11-19 14:01:01,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:50" (2/3) ... [2021-11-19 14:01:01,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a5a1bb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:01:01, skipping insertion in model container [2021-11-19 14:01:01,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:01:01" (3/3) ... [2021-11-19 14:01:01,499 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test4-3.i [2021-11-19 14:01:01,504 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:01:01,505 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:01:01,554 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:01:01,560 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 14:01:01,561 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:01:01,583 INFO L276 IsEmpty]: Start isEmpty. Operand has 261 states, 241 states have (on average 1.6887966804979253) internal successors, (407), 252 states have internal predecessors, (407), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-19 14:01:01,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-19 14:01:01,589 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:01,589 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:01,590 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:01,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:01,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1523630084, now seen corresponding path program 1 times [2021-11-19 14:01:01,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:01,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1221786161] [2021-11-19 14:01:01,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:01,608 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:01,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:01,613 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:01,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:01:01,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:01,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:01:01,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:01,954 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 14:01:01,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:02,004 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 14:01:02,004 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:02,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1221786161] [2021-11-19 14:01:02,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1221786161] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:02,006 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:02,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:01:02,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397028216] [2021-11-19 14:01:02,008 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:02,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:01:02,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:02,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:01:02,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:01:02,042 INFO L87 Difference]: Start difference. First operand has 261 states, 241 states have (on average 1.6887966804979253) internal successors, (407), 252 states have internal predecessors, (407), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 14:01:02,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:02,327 INFO L93 Difference]: Finished difference Result 691 states and 1180 transitions. [2021-11-19 14:01:02,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:01:02,330 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 10 [2021-11-19 14:01:02,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:02,363 INFO L225 Difference]: With dead ends: 691 [2021-11-19 14:01:02,363 INFO L226 Difference]: Without dead ends: 378 [2021-11-19 14:01:02,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 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 14:01:02,372 INFO L933 BasicCegarLoop]: 389 mSDtfsCounter, 601 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:02,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [613 Valid, 732 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:01:02,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-11-19 14:01:02,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2021-11-19 14:01:02,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 353 states have (on average 1.3087818696883853) internal successors, (462), 363 states have internal predecessors, (462), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-19 14:01:02,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 506 transitions. [2021-11-19 14:01:02,492 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 506 transitions. Word has length 10 [2021-11-19 14:01:02,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:02,492 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 506 transitions. [2021-11-19 14:01:02,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 14:01:02,493 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 506 transitions. [2021-11-19 14:01:02,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-19 14:01:02,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:02,508 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:02,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:02,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:02,721 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:02,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:02,722 INFO L85 PathProgramCache]: Analyzing trace with hash 930997070, now seen corresponding path program 1 times [2021-11-19 14:01:02,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:02,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2132759150] [2021-11-19 14:01:02,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:02,729 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:02,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:02,730 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:02,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:01:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:03,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:01:03,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:03,997 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 14:01:03,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 14:01:04,640 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:04,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2132759150] [2021-11-19 14:01:04,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2132759150] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:04,640 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:04,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:01:04,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484564810] [2021-11-19 14:01:04,641 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:04,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:01:04,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:04,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:01:04,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:01:04,644 INFO L87 Difference]: Start difference. First operand 378 states and 506 transitions. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 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 14:01:04,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:04,791 INFO L93 Difference]: Finished difference Result 756 states and 1018 transitions. [2021-11-19 14:01:04,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:01:04,791 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 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 206 [2021-11-19 14:01:04,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:04,795 INFO L225 Difference]: With dead ends: 756 [2021-11-19 14:01:04,795 INFO L226 Difference]: Without dead ends: 386 [2021-11-19 14:01:04,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:01:04,799 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 225 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:04,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 567 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:01:04,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-11-19 14:01:04,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 384. [2021-11-19 14:01:04,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 359 states have (on average 1.2590529247910864) internal successors, (452), 369 states have internal predecessors, (452), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-19 14:01:04,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 496 transitions. [2021-11-19 14:01:04,845 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 496 transitions. Word has length 206 [2021-11-19 14:01:04,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:04,845 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 496 transitions. [2021-11-19 14:01:04,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 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 14:01:04,846 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 496 transitions. [2021-11-19 14:01:04,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-19 14:01:04,851 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:04,851 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:04,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:05,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:05,075 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:05,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:05,075 INFO L85 PathProgramCache]: Analyzing trace with hash 2112529974, now seen corresponding path program 1 times [2021-11-19 14:01:05,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:05,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891701431] [2021-11-19 14:01:05,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:05,079 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:05,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:05,080 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:05,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:01:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:05,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:01:05,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:06,598 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 14:01:06,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 14:01:07,380 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:07,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891701431] [2021-11-19 14:01:07,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891701431] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:07,381 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:07,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:01:07,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567304008] [2021-11-19 14:01:07,382 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:07,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:01:07,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:07,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:01:07,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:01:07,384 INFO L87 Difference]: Start difference. First operand 384 states and 496 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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 14:01:07,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:07,901 INFO L93 Difference]: Finished difference Result 713 states and 930 transitions. [2021-11-19 14:01:07,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:01:07,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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 206 [2021-11-19 14:01:07,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:07,913 INFO L225 Difference]: With dead ends: 713 [2021-11-19 14:01:07,913 INFO L226 Difference]: Without dead ends: 382 [2021-11-19 14:01:07,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:01:07,915 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 11 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:07,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 523 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:01:07,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-19 14:01:07,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 382. [2021-11-19 14:01:07,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 357 states have (on average 1.257703081232493) internal successors, (449), 367 states have internal predecessors, (449), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-19 14:01:07,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 493 transitions. [2021-11-19 14:01:07,942 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 493 transitions. Word has length 206 [2021-11-19 14:01:07,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:07,942 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 493 transitions. [2021-11-19 14:01:07,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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 14:01:07,943 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 493 transitions. [2021-11-19 14:01:07,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-19 14:01:07,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:07,947 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 14:01:07,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:08,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:08,162 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:08,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:08,163 INFO L85 PathProgramCache]: Analyzing trace with hash 2039357527, now seen corresponding path program 1 times [2021-11-19 14:01:08,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:08,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [362723139] [2021-11-19 14:01:08,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:08,165 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:08,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:08,166 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:08,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:01:08,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:08,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:01:08,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:09,364 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-19 14:01:09,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:09,965 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-19 14:01:09,966 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:09,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [362723139] [2021-11-19 14:01:09,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [362723139] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:01:09,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:01:09,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:01:09,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625080573] [2021-11-19 14:01:09,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:09,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:01:09,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:09,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:01:09,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:01:09,969 INFO L87 Difference]: Start difference. First operand 382 states and 493 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 14:01:10,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:10,071 INFO L93 Difference]: Finished difference Result 720 states and 949 transitions. [2021-11-19 14:01:10,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:01:10,072 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 221 [2021-11-19 14:01:10,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:10,076 INFO L225 Difference]: With dead ends: 720 [2021-11-19 14:01:10,076 INFO L226 Difference]: Without dead ends: 385 [2021-11-19 14:01:10,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:01:10,079 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 2 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:10,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 791 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:01:10,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-11-19 14:01:10,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2021-11-19 14:01:10,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 359 states have (on average 1.2590529247910864) internal successors, (452), 370 states have internal predecessors, (452), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (26), 13 states have call predecessors, (26), 22 states have call successors, (26) [2021-11-19 14:01:10,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 500 transitions. [2021-11-19 14:01:10,110 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 500 transitions. Word has length 221 [2021-11-19 14:01:10,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:10,111 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 500 transitions. [2021-11-19 14:01:10,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 14:01:10,112 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 500 transitions. [2021-11-19 14:01:10,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-19 14:01:10,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:10,119 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 14:01:10,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:10,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:10,341 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:10,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:10,342 INFO L85 PathProgramCache]: Analyzing trace with hash -428528199, now seen corresponding path program 1 times [2021-11-19 14:01:10,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:10,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543516506] [2021-11-19 14:01:10,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:10,344 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:10,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:10,345 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:10,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:01:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:10,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:01:10,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:11,408 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-19 14:01:11,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:12,001 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 14:01:12,002 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:12,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543516506] [2021-11-19 14:01:12,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1543516506] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:01:12,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [730603529] [2021-11-19 14:01:12,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:12,002 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:01:12,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:01:12,006 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:01:12,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-19 14:01:12,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:12,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:01:12,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:13,144 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:01:13,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:01:13,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [730603529] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:14,000 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:01:14,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [5, 5] total 14 [2021-11-19 14:01:14,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704569975] [2021-11-19 14:01:14,000 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:14,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:01:14,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:14,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:01:14,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:01:14,003 INFO L87 Difference]: Start difference. First operand 385 states and 500 transitions. Second operand has 8 states, 8 states have (on average 26.375) internal successors, (211), 8 states have internal predecessors, (211), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:01:14,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:14,299 INFO L93 Difference]: Finished difference Result 698 states and 921 transitions. [2021-11-19 14:01:14,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:01:14,300 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 26.375) internal successors, (211), 8 states have internal predecessors, (211), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 223 [2021-11-19 14:01:14,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:14,305 INFO L225 Difference]: With dead ends: 698 [2021-11-19 14:01:14,305 INFO L226 Difference]: Without dead ends: 405 [2021-11-19 14:01:14,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 876 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:01:14,307 INFO L933 BasicCegarLoop]: 343 mSDtfsCounter, 403 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 1430 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:14,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 1430 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:01:14,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-11-19 14:01:14,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 403. [2021-11-19 14:01:14,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 377 states have (on average 1.220159151193634) internal successors, (460), 388 states have internal predecessors, (460), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (26), 13 states have call predecessors, (26), 22 states have call successors, (26) [2021-11-19 14:01:14,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 508 transitions. [2021-11-19 14:01:14,340 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 508 transitions. Word has length 223 [2021-11-19 14:01:14,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:14,343 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 508 transitions. [2021-11-19 14:01:14,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.375) internal successors, (211), 8 states have internal predecessors, (211), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:01:14,343 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 508 transitions. [2021-11-19 14:01:14,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-19 14:01:14,348 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:14,349 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 14:01:14,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:14,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:14,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:01:14,773 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:14,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:14,775 INFO L85 PathProgramCache]: Analyzing trace with hash 188730933, now seen corresponding path program 1 times [2021-11-19 14:01:14,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:14,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098097126] [2021-11-19 14:01:14,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:14,776 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:14,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:14,777 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:14,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:01:15,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:15,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:01:15,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:15,829 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-19 14:01:15,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:16,411 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 14:01:16,412 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:16,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098097126] [2021-11-19 14:01:16,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1098097126] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:01:16,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [731442492] [2021-11-19 14:01:16,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:16,412 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:01:16,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:01:16,414 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:01:16,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-19 14:01:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:16,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:01:16,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:18,581 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 14:01:18,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:20,163 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 14:01:20,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [731442492] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:20,164 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:01:20,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-19 14:01:20,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689935805] [2021-11-19 14:01:20,165 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:20,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:01:20,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:20,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:01:20,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:01:20,167 INFO L87 Difference]: Start difference. First operand 403 states and 508 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:01:20,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:20,968 INFO L93 Difference]: Finished difference Result 661 states and 842 transitions. [2021-11-19 14:01:20,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:01:20,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 223 [2021-11-19 14:01:20,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:20,973 INFO L225 Difference]: With dead ends: 661 [2021-11-19 14:01:20,973 INFO L226 Difference]: Without dead ends: 401 [2021-11-19 14:01:20,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 881 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:01:20,975 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 52 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:20,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 509 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:01:20,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-11-19 14:01:20,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 401. [2021-11-19 14:01:20,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 375 states have (on average 1.2186666666666666) internal successors, (457), 386 states have internal predecessors, (457), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (26), 13 states have call predecessors, (26), 22 states have call successors, (26) [2021-11-19 14:01:20,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 505 transitions. [2021-11-19 14:01:20,995 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 505 transitions. Word has length 223 [2021-11-19 14:01:20,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:20,996 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 505 transitions. [2021-11-19 14:01:20,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:01:20,996 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 505 transitions. [2021-11-19 14:01:21,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-19 14:01:21,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:21,001 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:21,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:21,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-19 14:01:21,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:21,406 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:21,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:21,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1944112150, now seen corresponding path program 1 times [2021-11-19 14:01:21,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:21,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [681284795] [2021-11-19 14:01:21,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:21,409 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:21,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:21,411 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:21,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:01:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:22,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:01:22,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:22,587 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 14:01:22,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:23,143 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 14:01:23,143 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:23,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [681284795] [2021-11-19 14:01:23,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [681284795] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:01:23,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2027697389] [2021-11-19 14:01:23,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:23,144 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:01:23,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:01:23,145 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:01:23,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-19 14:01:23,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:23,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:01:23,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:24,208 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-19 14:01:24,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:24,686 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-19 14:01:24,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2027697389] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:24,686 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:01:24,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 13 [2021-11-19 14:01:24,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974040340] [2021-11-19 14:01:24,687 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:24,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:01:24,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:24,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:01:24,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:01:24,688 INFO L87 Difference]: Start difference. First operand 401 states and 505 transitions. Second operand has 7 states, 7 states have (on average 27.285714285714285) internal successors, (191), 7 states have internal predecessors, (191), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-19 14:01:24,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:24,872 INFO L93 Difference]: Finished difference Result 671 states and 853 transitions. [2021-11-19 14:01:24,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:01:24,873 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 27.285714285714285) internal successors, (191), 7 states have internal predecessors, (191), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 240 [2021-11-19 14:01:24,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:24,876 INFO L225 Difference]: With dead ends: 671 [2021-11-19 14:01:24,876 INFO L226 Difference]: Without dead ends: 377 [2021-11-19 14:01:24,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 945 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:01:24,878 INFO L933 BasicCegarLoop]: 338 mSDtfsCounter, 203 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 1238 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:24,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 1238 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:01:24,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-11-19 14:01:24,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-11-19 14:01:24,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 351 states have (on average 1.1937321937321936) internal successors, (419), 362 states have internal predecessors, (419), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (26), 13 states have call predecessors, (26), 22 states have call successors, (26) [2021-11-19 14:01:24,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 467 transitions. [2021-11-19 14:01:24,899 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 467 transitions. Word has length 240 [2021-11-19 14:01:24,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:24,900 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 467 transitions. [2021-11-19 14:01:24,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.285714285714285) internal successors, (191), 7 states have internal predecessors, (191), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-19 14:01:24,900 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 467 transitions. [2021-11-19 14:01:24,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-19 14:01:24,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:24,905 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:24,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:25,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:25,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:01:25,313 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:25,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:25,313 INFO L85 PathProgramCache]: Analyzing trace with hash 678967446, now seen corresponding path program 1 times [2021-11-19 14:01:25,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:25,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [422725776] [2021-11-19 14:01:25,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:25,315 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:25,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:25,316 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:25,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:01:25,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:25,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:01:25,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:26,340 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 14:01:26,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 14:01:26,885 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:26,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [422725776] [2021-11-19 14:01:26,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [422725776] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:01:26,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [255579686] [2021-11-19 14:01:26,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:26,886 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:01:26,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:01:26,888 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:01:26,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-19 14:01:27,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:27,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:01:27,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 14:01:28,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:28,855 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 14:01:28,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [255579686] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:01:28,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645839188] [2021-11-19 14:01:28,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:28,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:01:28,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:01:28,857 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:01:28,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-19 14:01:29,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:29,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:01:29,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:30,210 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-19 14:01:30,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:31,195 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-19 14:01:31,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645839188] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:01:31,195 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:01:31,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2021-11-19 14:01:31,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077315827] [2021-11-19 14:01:31,196 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:01:31,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:01:31,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:31,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:01:31,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:01:31,200 INFO L87 Difference]: Start difference. First operand 377 states and 467 transitions. Second operand has 14 states, 14 states have (on average 42.142857142857146) internal successors, (590), 14 states have internal predecessors, (590), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:01:33,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:33,616 INFO L93 Difference]: Finished difference Result 1398 states and 1773 transitions. [2021-11-19 14:01:33,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:01:33,617 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 42.142857142857146) internal successors, (590), 14 states have internal predecessors, (590), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 240 [2021-11-19 14:01:33,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:33,625 INFO L225 Difference]: With dead ends: 1398 [2021-11-19 14:01:33,625 INFO L226 Difference]: Without dead ends: 1068 [2021-11-19 14:01:33,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1443 GetRequests, 1424 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:01:33,628 INFO L933 BasicCegarLoop]: 688 mSDtfsCounter, 1693 mSDsluCounter, 3138 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1729 SdHoareTripleChecker+Valid, 3826 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:33,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1729 Valid, 3826 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-19 14:01:33,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-11-19 14:01:33,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 1066. [2021-11-19 14:01:33,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 1015 states have (on average 1.1832512315270935) internal successors, (1201), 1026 states have internal predecessors, (1201), 46 states have call successors, (46), 3 states have call predecessors, (46), 4 states have return successors, (58), 37 states have call predecessors, (58), 46 states have call successors, (58) [2021-11-19 14:01:33,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1305 transitions. [2021-11-19 14:01:33,679 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1305 transitions. Word has length 240 [2021-11-19 14:01:33,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:33,679 INFO L470 AbstractCegarLoop]: Abstraction has 1066 states and 1305 transitions. [2021-11-19 14:01:33,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 42.142857142857146) internal successors, (590), 14 states have internal predecessors, (590), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:01:33,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1305 transitions. [2021-11-19 14:01:33,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2021-11-19 14:01:33,707 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:33,707 INFO L514 BasicCegarLoop]: trace histogram [12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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, 1, 1] [2021-11-19 14:01:33,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:33,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-19 14:01:34,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:34,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:01:34,329 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:34,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:34,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1071950454, now seen corresponding path program 2 times [2021-11-19 14:01:34,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:34,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [368779168] [2021-11-19 14:01:34,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:01:34,333 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:34,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:34,334 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:34,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:01:35,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:01:35,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:01:35,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 1437 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:01:35,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 245 proven. 10 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-11-19 14:01:37,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 181 proven. 71 refuted. 0 times theorem prover too weak. 1342 trivial. 0 not checked. [2021-11-19 14:01:38,683 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:38,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [368779168] [2021-11-19 14:01:38,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [368779168] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:01:38,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [325399791] [2021-11-19 14:01:38,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:01:38,684 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:01:38,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:01:38,685 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:01:38,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-19 14:01:40,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:01:40,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:01:40,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 1437 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:01:40,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:41,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 245 proven. 10 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-11-19 14:01:41,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:43,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 181 proven. 71 refuted. 0 times theorem prover too weak. 1342 trivial. 0 not checked. [2021-11-19 14:01:43,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [325399791] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:01:43,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306624586] [2021-11-19 14:01:43,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:01:43,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:01:43,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:01:43,293 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:01:43,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-19 14:01:44,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:01:44,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:01:44,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 1437 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:01:44,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:45,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 274 proven. 3 refuted. 0 times theorem prover too weak. 1317 trivial. 0 not checked. [2021-11-19 14:01:45,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:47,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 198 proven. 31 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2021-11-19 14:01:47,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306624586] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:01:47,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:01:47,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 6, 6] total 20 [2021-11-19 14:01:47,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038174713] [2021-11-19 14:01:47,286 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:01:47,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 14:01:47,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:47,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 14:01:47,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-11-19 14:01:47,290 INFO L87 Difference]: Start difference. First operand 1066 states and 1305 transitions. Second operand has 20 states, 20 states have (on average 9.5) internal successors, (190), 20 states have internal predecessors, (190), 2 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:01:49,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:49,078 INFO L93 Difference]: Finished difference Result 2111 states and 2721 transitions. [2021-11-19 14:01:49,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-19 14:01:49,081 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 9.5) internal successors, (190), 20 states have internal predecessors, (190), 2 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 640 [2021-11-19 14:01:49,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:49,090 INFO L225 Difference]: With dead ends: 2111 [2021-11-19 14:01:49,091 INFO L226 Difference]: Without dead ends: 1086 [2021-11-19 14:01:49,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3859 GetRequests, 3816 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=554, Invalid=1426, Unknown=0, NotChecked=0, Total=1980 [2021-11-19 14:01:49,098 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 153 mSDsluCounter, 1946 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 2198 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:49,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 2198 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:01:49,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-11-19 14:01:49,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 1078. [2021-11-19 14:01:49,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1027 states have (on average 1.1850048685491723) internal successors, (1217), 1038 states have internal predecessors, (1217), 46 states have call successors, (46), 3 states have call predecessors, (46), 4 states have return successors, (58), 37 states have call predecessors, (58), 46 states have call successors, (58) [2021-11-19 14:01:49,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 1321 transitions. [2021-11-19 14:01:49,170 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 1321 transitions. Word has length 640 [2021-11-19 14:01:49,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:49,171 INFO L470 AbstractCegarLoop]: Abstraction has 1078 states and 1321 transitions. [2021-11-19 14:01:49,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.5) internal successors, (190), 20 states have internal predecessors, (190), 2 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:01:49,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 1321 transitions. [2021-11-19 14:01:49,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 665 [2021-11-19 14:01:49,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:49,196 INFO L514 BasicCegarLoop]: trace histogram [36, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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, 1, 1] [2021-11-19 14:01:49,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:49,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:49,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:49,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:01:49,817 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:49,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:49,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1097680246, now seen corresponding path program 3 times [2021-11-19 14:01:49,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:49,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [28613025] [2021-11-19 14:01:49,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:01:49,822 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:49,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:49,824 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:49,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca035e3-c9fc-4761-84a6-4e00fac0ac09/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process