./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/stroeder2-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/stroeder2-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash eb1b14e8511764ce20ab6a88d1bf2bef8398fca052e797a3c06b53051dc2f2a5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:14:15,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:14:15,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:14:15,997 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:14:15,998 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:14:16,002 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:14:16,004 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:14:16,008 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:14:16,010 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:14:16,016 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:14:16,017 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:14:16,018 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:14:16,019 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:14:16,021 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:14:16,024 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:14:16,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:14:16,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:14:16,034 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:14:16,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:14:16,043 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:14:16,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:14:16,047 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:14:16,050 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:14:16,051 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:14:16,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:14:16,060 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:14:16,060 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:14:16,062 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:14:16,063 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:14:16,064 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:14:16,064 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:14:16,065 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:14:16,067 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:14:16,068 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:14:16,070 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:14:16,070 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:14:16,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:14:16,071 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:14:16,071 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:14:16,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:14:16,073 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:14:16,073 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-03 04:14:16,116 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:14:16,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:14:16,118 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:14:16,118 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:14:16,119 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:14:16,119 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:14:16,119 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:14:16,119 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:14:16,119 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:14:16,119 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:14:16,120 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:14:16,121 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:14:16,121 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:14:16,121 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:14:16,121 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:14:16,122 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 04:14:16,122 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 04:14:16,122 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:14:16,122 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:14:16,123 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 04:14:16,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:14:16,123 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:14:16,123 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:14:16,123 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 04:14:16,124 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 04:14:16,124 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 04:14:16,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:14:16,125 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:14:16,126 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:14:16,126 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:14:16,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:14:16,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:14:16,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:14:16,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:14:16,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:14:16,127 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:14:16,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:14:16,127 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:14:16,128 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:14:16,128 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_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb1b14e8511764ce20ab6a88d1bf2bef8398fca052e797a3c06b53051dc2f2a5 [2021-11-03 04:14:16,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:14:16,467 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:14:16,469 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:14:16,471 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:14:16,471 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:14:16,472 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/array-memsafety/stroeder2-alloca-1.i [2021-11-03 04:14:16,536 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/data/413ce2655/1c0e9c52c4b84196b00efc8d6de11bc0/FLAGa4a6dc268 [2021-11-03 04:14:17,087 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:14:17,088 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/sv-benchmarks/c/array-memsafety/stroeder2-alloca-1.i [2021-11-03 04:14:17,102 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/data/413ce2655/1c0e9c52c4b84196b00efc8d6de11bc0/FLAGa4a6dc268 [2021-11-03 04:14:17,516 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/data/413ce2655/1c0e9c52c4b84196b00efc8d6de11bc0 [2021-11-03 04:14:17,519 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:14:17,520 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:14:17,528 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:14:17,529 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:14:17,532 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:14:17,533 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:14:17" (1/1) ... [2021-11-03 04:14:17,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@595c343c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:14:17, skipping insertion in model container [2021-11-03 04:14:17,534 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:14:17" (1/1) ... [2021-11-03 04:14:17,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:14:17,619 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:14:17,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:14:17,911 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) [2021-11-03 04:14:17,912 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3a8c4472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:14:17, skipping insertion in model container [2021-11-03 04:14:17,912 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:14:17,913 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:14:17,915 INFO L168 Benchmark]: Toolchain (without parser) took 393.87 ms. Allocated memory is still 100.7 MB. Free memory was 57.6 MB in the beginning and 72.4 MB in the end (delta: -14.8 MB). Peak memory consumption was 4.3 MB. Max. memory is 16.1 GB. [2021-11-03 04:14:17,916 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 100.7 MB. Free memory is still 75.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:14:17,918 INFO L168 Benchmark]: CACSL2BoogieTranslator took 384.47 ms. Allocated memory is still 100.7 MB. Free memory was 57.4 MB in the beginning and 72.4 MB in the end (delta: -15.0 MB). Peak memory consumption was 4.3 MB. Max. memory is 16.1 GB. [2021-11-03 04:14:17,920 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 100.7 MB. Free memory is still 75.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 384.47 ms. Allocated memory is still 100.7 MB. Free memory was 57.4 MB in the beginning and 72.4 MB in the end (delta: -15.0 MB). Peak memory consumption was 4.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 532]: 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_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/stroeder2-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash eb1b14e8511764ce20ab6a88d1bf2bef8398fca052e797a3c06b53051dc2f2a5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:14:20,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:14:20,059 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:14:20,123 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:14:20,123 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:14:20,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:14:20,130 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:14:20,134 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:14:20,137 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:14:20,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:14:20,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:14:20,151 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:14:20,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:14:20,154 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:14:20,155 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:14:20,156 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:14:20,157 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:14:20,158 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:14:20,160 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:14:20,162 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:14:20,164 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:14:20,165 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:14:20,166 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:14:20,167 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:14:20,171 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:14:20,171 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:14:20,171 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:14:20,172 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:14:20,173 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:14:20,174 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:14:20,174 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:14:20,175 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:14:20,176 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:14:20,177 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:14:20,178 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:14:20,178 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:14:20,179 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:14:20,179 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:14:20,180 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:14:20,181 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:14:20,181 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:14:20,182 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-03 04:14:20,212 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:14:20,212 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:14:20,213 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:14:20,213 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:14:20,213 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:14:20,213 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:14:20,213 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:14:20,214 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:14:20,214 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:14:20,214 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 04:14:20,215 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 04:14:20,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:14:20,215 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:14:20,215 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 04:14:20,215 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:14:20,216 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:14:20,216 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:14:20,216 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 04:14:20,216 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 04:14:20,216 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 04:14:20,217 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:14:20,217 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:14:20,217 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:14:20,217 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:14:20,217 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:14:20,217 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:14:20,217 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:14:20,217 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:14:20,218 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:14:20,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:14:20,218 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:14:20,218 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:14:20,218 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:14:20,218 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:14:20,218 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:14:20,219 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:14:20,219 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_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb1b14e8511764ce20ab6a88d1bf2bef8398fca052e797a3c06b53051dc2f2a5 [2021-11-03 04:14:20,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:14:20,600 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:14:20,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:14:20,604 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:14:20,605 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:14:20,605 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/array-memsafety/stroeder2-alloca-1.i [2021-11-03 04:14:20,674 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/data/f78f35ba2/b3fecb64d82f4643b0693a8c847ac4b0/FLAG5c481b45e [2021-11-03 04:14:21,273 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:14:21,274 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/sv-benchmarks/c/array-memsafety/stroeder2-alloca-1.i [2021-11-03 04:14:21,286 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/data/f78f35ba2/b3fecb64d82f4643b0693a8c847ac4b0/FLAG5c481b45e [2021-11-03 04:14:21,548 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/data/f78f35ba2/b3fecb64d82f4643b0693a8c847ac4b0 [2021-11-03 04:14:21,554 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:14:21,556 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:14:21,558 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:14:21,558 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:14:21,561 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:14:21,562 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:14:21" (1/1) ... [2021-11-03 04:14:21,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@712c3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:14:21, skipping insertion in model container [2021-11-03 04:14:21,567 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:14:21" (1/1) ... [2021-11-03 04:14:21,574 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:14:21,630 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:14:21,976 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:14:21,987 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:14:21,993 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:14:22,019 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:14:22,024 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:14:22,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:14:22,087 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:14:22,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:14:22 WrapperNode [2021-11-03 04:14:22,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:14:22,089 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:14:22,089 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:14:22,089 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:14:22,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:14:22" (1/1) ... [2021-11-03 04:14:22,114 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:14:22" (1/1) ... [2021-11-03 04:14:22,134 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:14:22,134 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:14:22,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:14:22,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:14:22,142 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:14:22" (1/1) ... [2021-11-03 04:14:22,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:14:22" (1/1) ... [2021-11-03 04:14:22,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:14:22" (1/1) ... [2021-11-03 04:14:22,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:14:22" (1/1) ... [2021-11-03 04:14:22,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:14:22" (1/1) ... [2021-11-03 04:14:22,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:14:22" (1/1) ... [2021-11-03 04:14:22,161 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:14:22" (1/1) ... [2021-11-03 04:14:22,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:14:22,165 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:14:22,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:14:22,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:14:22,166 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:14:22" (1/1) ... [2021-11-03 04:14:22,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:14:22,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:14:22,197 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:14:22,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:14:22,241 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 04:14:22,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:14:22,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-03 04:14:22,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 04:14:22,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 04:14:22,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:14:22,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:14:22,660 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:14:22,661 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-03 04:14:22,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:14:22 BoogieIcfgContainer [2021-11-03 04:14:22,663 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:14:22,665 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:14:22,665 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:14:22,668 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:14:22,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:14:21" (1/3) ... [2021-11-03 04:14:22,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@553ca02d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:14:22, skipping insertion in model container [2021-11-03 04:14:22,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:14:22" (2/3) ... [2021-11-03 04:14:22,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@553ca02d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:14:22, skipping insertion in model container [2021-11-03 04:14:22,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:14:22" (3/3) ... [2021-11-03 04:14:22,672 INFO L111 eAbstractionObserver]: Analyzing ICFG stroeder2-alloca-1.i [2021-11-03 04:14:22,677 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:14:22,677 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-11-03 04:14:22,722 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:14:22,729 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 04:14:22,729 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-11-03 04:14:22,743 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:22,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 04:14:22,749 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:14:22,750 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 04:14:22,750 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-03 04:14:22,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:14:22,756 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-11-03 04:14:22,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:14:22,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763129423] [2021-11-03 04:14:22,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:14:22,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:14:22,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:14:22,782 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:14:22,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:14:22,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:14:22,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:14:22,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:14:22,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:14:22,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:22,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:14:23,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:23,003 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:14:23,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [763129423] [2021-11-03 04:14:23,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [763129423] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:14:23,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:14:23,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:14:23,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581745613] [2021-11-03 04:14:23,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:14:23,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:14:23,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:14:23,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:14:23,051 INFO L87 Difference]: Start difference. First operand has 31 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:23,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:14:23,125 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-11-03 04:14:23,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:14:23,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-03 04:14:23,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:14:23,134 INFO L225 Difference]: With dead ends: 30 [2021-11-03 04:14:23,134 INFO L226 Difference]: Without dead ends: 28 [2021-11-03 04:14:23,136 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:14:23,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-03 04:14:23,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-03 04:14:23,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.55) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:23,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-11-03 04:14:23,164 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 6 [2021-11-03 04:14:23,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:14:23,165 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-11-03 04:14:23,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:23,165 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-11-03 04:14:23,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 04:14:23,166 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:14:23,166 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 04:14:23,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:14:23,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:14:23,384 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-03 04:14:23,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:14:23,385 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2021-11-03 04:14:23,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:14:23,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1590458794] [2021-11-03 04:14:23,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:14:23,386 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:14:23,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:14:23,387 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:14:23,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:14:23,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:14:23,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:14:23,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:14:23,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:14:23,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:23,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:14:23,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:23,786 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:14:23,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1590458794] [2021-11-03 04:14:23,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1590458794] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:14:23,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:14:23,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:14:23,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920897563] [2021-11-03 04:14:23,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:14:23,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:14:23,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:14:23,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:14:23,792 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:24,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:14:24,358 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2021-11-03 04:14:24,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:14:24,359 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-03 04:14:24,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:14:24,360 INFO L225 Difference]: With dead ends: 78 [2021-11-03 04:14:24,360 INFO L226 Difference]: Without dead ends: 78 [2021-11-03 04:14:24,361 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:14:24,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-03 04:14:24,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 32. [2021-11-03 04:14:24,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.5) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:24,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-11-03 04:14:24,367 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2021-11-03 04:14:24,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:14:24,368 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-11-03 04:14:24,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:24,368 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-11-03 04:14:24,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 04:14:24,369 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:14:24,369 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:14:24,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-03 04:14:24,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:14:24,579 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-03 04:14:24,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:14:24,580 INFO L85 PathProgramCache]: Analyzing trace with hash 176742583, now seen corresponding path program 1 times [2021-11-03 04:14:24,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:14:24,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1578947367] [2021-11-03 04:14:24,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:14:24,582 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:14:24,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:14:24,583 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:14:24,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:14:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:14:24,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:14:24,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:14:24,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:14:24,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:24,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:14:24,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:24,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:14:24,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1578947367] [2021-11-03 04:14:24,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1578947367] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:14:24,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:14:24,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:14:24,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338568117] [2021-11-03 04:14:24,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:14:24,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:14:24,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:14:24,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:14:24,778 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:24,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:14:24,906 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-11-03 04:14:24,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:14:24,906 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-03 04:14:24,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:14:24,907 INFO L225 Difference]: With dead ends: 32 [2021-11-03 04:14:24,907 INFO L226 Difference]: Without dead ends: 32 [2021-11-03 04:14:24,907 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:14:24,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-03 04:14:24,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2021-11-03 04:14:24,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.375) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:24,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-11-03 04:14:24,911 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 8 [2021-11-03 04:14:24,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:14:24,911 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-11-03 04:14:24,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:24,912 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-11-03 04:14:24,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 04:14:24,912 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:14:24,912 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:14:24,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:14:25,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:14:25,121 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-03 04:14:25,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:14:25,122 INFO L85 PathProgramCache]: Analyzing trace with hash 176742584, now seen corresponding path program 1 times [2021-11-03 04:14:25,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:14:25,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1659362093] [2021-11-03 04:14:25,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:14:25,123 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:14:25,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:14:25,124 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:14:25,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:14:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:14:25,190 WARN L261 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-03 04:14:25,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:14:25,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-03 04:14:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:25,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:14:25,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:25,821 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:14:25,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1659362093] [2021-11-03 04:14:25,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1659362093] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:14:25,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:14:25,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 6] imperfect sequences [] total 9 [2021-11-03 04:14:25,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125052550] [2021-11-03 04:14:25,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-03 04:14:25,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:14:25,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-03 04:14:25,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:14:25,823 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:26,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:14:26,725 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-11-03 04:14:26,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:14:26,726 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-03 04:14:26,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:14:26,727 INFO L225 Difference]: With dead ends: 42 [2021-11-03 04:14:26,727 INFO L226 Difference]: Without dead ends: 42 [2021-11-03 04:14:26,727 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:14:26,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-03 04:14:26,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 27. [2021-11-03 04:14:26,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:26,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-11-03 04:14:26,731 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 8 [2021-11-03 04:14:26,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:14:26,731 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-11-03 04:14:26,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:26,732 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-11-03 04:14:26,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-03 04:14:26,732 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:14:26,732 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:14:26,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:14:26,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:14:26,943 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-03 04:14:26,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:14:26,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2021-11-03 04:14:26,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:14:26,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1154705003] [2021-11-03 04:14:26,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:14:26,945 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:14:26,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:14:26,946 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:14:26,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:14:27,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:14:27,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:14:27,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:14:27,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:27,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:14:27,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:27,188 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:14:27,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1154705003] [2021-11-03 04:14:27,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1154705003] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:14:27,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1718841644] [2021-11-03 04:14:27,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:14:27,189 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:14:27,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:14:27,192 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:14:27,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-03 04:14:27,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:14:27,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:14:27,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:14:27,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:27,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:14:27,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:27,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1718841644] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:14:27,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727529114] [2021-11-03 04:14:27,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:14:27,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:14:27,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:14:27,430 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:14:27,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-03 04:14:27,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:14:27,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:14:27,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:14:27,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:27,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:14:27,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:27,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727529114] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:14:27,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:14:27,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-03 04:14:27,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096788786] [2021-11-03 04:14:27,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:14:27,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:14:27,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:14:27,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:14:27,632 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:27,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:14:27,687 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-11-03 04:14:27,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:14:27,697 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-03 04:14:27,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:14:27,698 INFO L225 Difference]: With dead ends: 49 [2021-11-03 04:14:27,698 INFO L226 Difference]: Without dead ends: 49 [2021-11-03 04:14:27,698 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:14:27,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-03 04:14:27,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 33. [2021-11-03 04:14:27,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:27,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-11-03 04:14:27,702 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 10 [2021-11-03 04:14:27,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:14:27,702 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-11-03 04:14:27,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:27,703 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-11-03 04:14:27,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-03 04:14:27,703 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:14:27,703 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:14:27,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:14:27,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:14:28,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:14:28,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:14:28,310 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-03 04:14:28,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:14:28,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-11-03 04:14:28,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:14:28,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [908637913] [2021-11-03 04:14:28,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:14:28,311 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:14:28,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:14:28,312 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:14:28,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:14:28,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:14:28,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:14:28,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:14:28,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-03 04:14:28,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:28,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:14:29,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:29,301 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:14:29,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [908637913] [2021-11-03 04:14:29,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [908637913] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:14:29,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2004308486] [2021-11-03 04:14:29,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:14:29,302 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:14:29,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:14:29,303 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:14:29,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-03 04:14:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:14:29,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:14:29,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:14:29,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-03 04:14:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:29,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:14:29,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:29,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2004308486] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:14:29,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978236177] [2021-11-03 04:14:29,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:14:29,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:14:29,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:14:29,911 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:14:29,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-03 04:14:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:14:30,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:14:30,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:14:30,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-03 04:14:30,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:30,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:14:30,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:30,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978236177] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:14:30,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:14:30,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2021-11-03 04:14:30,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559128840] [2021-11-03 04:14:30,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:14:30,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:14:30,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:14:30,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:14:30,494 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:31,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:14:31,528 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2021-11-03 04:14:31,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 04:14:31,530 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-03 04:14:31,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:14:31,531 INFO L225 Difference]: With dead ends: 77 [2021-11-03 04:14:31,531 INFO L226 Difference]: Without dead ends: 77 [2021-11-03 04:14:31,531 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-11-03 04:14:31,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-03 04:14:31,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 45. [2021-11-03 04:14:31,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:31,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2021-11-03 04:14:31,536 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 10 [2021-11-03 04:14:31,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:14:31,537 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2021-11-03 04:14:31,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:31,537 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2021-11-03 04:14:31,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-03 04:14:31,538 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:14:31,538 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:14:31,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:14:31,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:14:31,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:14:32,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:14:32,149 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-03 04:14:32,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:14:32,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1604227594, now seen corresponding path program 1 times [2021-11-03 04:14:32,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:14:32,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106734100] [2021-11-03 04:14:32,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:14:32,150 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:14:32,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:14:32,151 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:14:32,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:14:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:14:32,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:14:32,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:14:32,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:14:32,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:14:32,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:14:32,416 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:14:32,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106734100] [2021-11-03 04:14:32,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [106734100] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:14:32,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:14:32,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:14:32,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064088329] [2021-11-03 04:14:32,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:14:32,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:14:32,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:14:32,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:14:32,419 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:32,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:14:32,492 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2021-11-03 04:14:32,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:14:32,492 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-03 04:14:32,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:14:32,494 INFO L225 Difference]: With dead ends: 68 [2021-11-03 04:14:32,494 INFO L226 Difference]: Without dead ends: 68 [2021-11-03 04:14:32,495 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:14:32,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-03 04:14:32,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 45. [2021-11-03 04:14:32,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:32,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2021-11-03 04:14:32,499 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 14 [2021-11-03 04:14:32,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:14:32,502 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2021-11-03 04:14:32,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:32,503 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2021-11-03 04:14:32,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-03 04:14:32,504 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:14:32,504 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:14:32,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:14:32,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:14:32,715 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-03 04:14:32,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:14:32,715 INFO L85 PathProgramCache]: Analyzing trace with hash 265956368, now seen corresponding path program 1 times [2021-11-03 04:14:32,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:14:32,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1246549001] [2021-11-03 04:14:32,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:14:32,720 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:14:32,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:14:32,721 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:14:32,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:14:32,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:14:32,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:14:32,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:14:32,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:14:32,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:14:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:14:33,068 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:14:33,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1246549001] [2021-11-03 04:14:33,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1246549001] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:14:33,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1609245394] [2021-11-03 04:14:33,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:14:33,069 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:14:33,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:14:33,072 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:14:33,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-03 04:14:33,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:14:33,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:14:33,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:14:33,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:14:33,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:14:33,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:14:33,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1609245394] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:14:33,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98568408] [2021-11-03 04:14:33,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:14:33,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:14:33,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:14:33,444 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:14:33,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-03 04:14:33,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:14:33,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:14:33,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:14:33,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:14:33,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:14:33,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:14:33,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98568408] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:14:33,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:14:33,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-03 04:14:33,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629673480] [2021-11-03 04:14:33,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:14:33,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:14:33,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:14:33,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:14:33,783 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:33,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:14:33,865 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-11-03 04:14:33,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:14:33,866 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-03 04:14:33,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:14:33,867 INFO L225 Difference]: With dead ends: 59 [2021-11-03 04:14:33,867 INFO L226 Difference]: Without dead ends: 59 [2021-11-03 04:14:33,867 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:14:33,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-03 04:14:33,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2021-11-03 04:14:33,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 54 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:33,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-11-03 04:14:33,879 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 16 [2021-11-03 04:14:33,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:14:33,879 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-11-03 04:14:33,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:33,880 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-11-03 04:14:33,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-03 04:14:33,881 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:14:33,884 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:14:33,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-03 04:14:34,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:14:34,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:14:34,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:14:34,504 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-03 04:14:34,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:14:34,505 INFO L85 PathProgramCache]: Analyzing trace with hash -745160882, now seen corresponding path program 1 times [2021-11-03 04:14:34,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:14:34,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [838493761] [2021-11-03 04:14:34,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:14:34,505 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:14:34,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:14:34,506 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:14:34,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:14:34,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:14:34,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-03 04:14:34,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:14:34,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-03 04:14:35,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:14:35,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:14:35,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:14:35,799 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:14:35,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [838493761] [2021-11-03 04:14:35,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [838493761] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:14:35,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [127475559] [2021-11-03 04:14:35,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:14:35,800 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:14:35,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:14:35,804 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:14:35,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-03 04:14:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:14:36,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:14:36,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:14:36,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:36,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:14:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:36,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [127475559] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:14:36,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163649879] [2021-11-03 04:14:36,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:14:36,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:14:36,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:14:36,670 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:14:36,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-03 04:14:36,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:14:36,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:14:36,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:14:37,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:37,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:14:37,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:37,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163649879] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:14:37,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:14:37,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 7, 8, 7] total 22 [2021-11-03 04:14:37,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186189576] [2021-11-03 04:14:37,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-03 04:14:37,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:14:37,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-03 04:14:37,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-11-03 04:14:37,136 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:40,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:14:40,312 INFO L93 Difference]: Finished difference Result 111 states and 123 transitions. [2021-11-03 04:14:40,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-03 04:14:40,313 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-03 04:14:40,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:14:40,314 INFO L225 Difference]: With dead ends: 111 [2021-11-03 04:14:40,314 INFO L226 Difference]: Without dead ends: 111 [2021-11-03 04:14:40,315 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=352, Invalid=1370, Unknown=0, NotChecked=0, Total=1722 [2021-11-03 04:14:40,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-03 04:14:40,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 79. [2021-11-03 04:14:40,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:40,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2021-11-03 04:14:40,321 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 16 [2021-11-03 04:14:40,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:14:40,322 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2021-11-03 04:14:40,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:40,322 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2021-11-03 04:14:40,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-03 04:14:40,323 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:14:40,323 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:14:40,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 04:14:40,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-03 04:14:40,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-03 04:14:40,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:14:40,940 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-03 04:14:40,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:14:40,940 INFO L85 PathProgramCache]: Analyzing trace with hash -2114005431, now seen corresponding path program 1 times [2021-11-03 04:14:40,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:14:40,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527903292] [2021-11-03 04:14:40,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:14:40,940 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:14:40,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:14:40,941 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:14:40,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 04:14:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:14:41,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:14:41,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:14:41,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:14:41,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 04:14:41,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:14:43,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 04:14:43,489 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:14:43,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527903292] [2021-11-03 04:14:43,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527903292] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:14:43,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:14:43,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 7 [2021-11-03 04:14:43,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436879682] [2021-11-03 04:14:43,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:14:43,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:14:43,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:14:43,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=37, Unknown=1, NotChecked=0, Total=56 [2021-11-03 04:14:43,491 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:43,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:14:43,575 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2021-11-03 04:14:43,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:14:43,576 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-03 04:14:43,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:14:43,577 INFO L225 Difference]: With dead ends: 78 [2021-11-03 04:14:43,577 INFO L226 Difference]: Without dead ends: 59 [2021-11-03 04:14:43,577 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=23, Invalid=48, Unknown=1, NotChecked=0, Total=72 [2021-11-03 04:14:43,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-03 04:14:43,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-03 04:14:43,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 58 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:43,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2021-11-03 04:14:43,581 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 18 [2021-11-03 04:14:43,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:14:43,581 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2021-11-03 04:14:43,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:43,581 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2021-11-03 04:14:43,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-03 04:14:43,582 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:14:43,582 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-03 04:14:43,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 04:14:43,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:14:43,793 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-03 04:14:43,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:14:43,793 INFO L85 PathProgramCache]: Analyzing trace with hash 302966996, now seen corresponding path program 2 times [2021-11-03 04:14:43,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:14:43,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722418209] [2021-11-03 04:14:43,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:14:43,794 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:14:43,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:14:43,795 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:14:43,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 04:14:44,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:14:44,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:14:44,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-03 04:14:44,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:14:44,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-03 04:14:44,785 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:44,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:14:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:46,655 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:14:46,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722418209] [2021-11-03 04:14:46,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722418209] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:14:46,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [825871662] [2021-11-03 04:14:46,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:14:46,656 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:14:46,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:14:46,660 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:14:46,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-03 04:14:47,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:14:47,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:14:47,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-03 04:14:47,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:14:47,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-03 04:14:47,579 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:47,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:14:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:48,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [825871662] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:14:48,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180286629] [2021-11-03 04:14:48,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:14:48,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:14:48,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:14:48,356 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:14:48,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-03 04:14:48,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:14:48,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:14:48,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-03 04:14:48,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:14:48,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-03 04:14:49,357 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:49,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:14:50,985 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:50,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180286629] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:14:50,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:14:50,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 10, 10] total 22 [2021-11-03 04:14:50,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113913593] [2021-11-03 04:14:50,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-03 04:14:50,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:14:50,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-03 04:14:50,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2021-11-03 04:14:50,987 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:56,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:14:56,489 INFO L93 Difference]: Finished difference Result 335 states and 376 transitions. [2021-11-03 04:14:56,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-03 04:14:56,490 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-03 04:14:56,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:14:56,492 INFO L225 Difference]: With dead ends: 335 [2021-11-03 04:14:56,492 INFO L226 Difference]: Without dead ends: 335 [2021-11-03 04:14:56,493 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=379, Invalid=811, Unknown=0, NotChecked=0, Total=1190 [2021-11-03 04:14:56,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-11-03 04:14:56,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 83. [2021-11-03 04:14:56,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 81 states have (on average 1.1851851851851851) internal successors, (96), 82 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:56,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2021-11-03 04:14:56,501 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 22 [2021-11-03 04:14:56,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:14:56,501 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2021-11-03 04:14:56,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:56,502 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2021-11-03 04:14:56,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-03 04:14:56,503 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:14:56,503 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:14:56,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-03 04:14:56,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 04:14:56,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-03 04:14:57,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:14:57,106 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-03 04:14:57,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:14:57,106 INFO L85 PathProgramCache]: Analyzing trace with hash 2021775754, now seen corresponding path program 2 times [2021-11-03 04:14:57,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:14:57,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616906907] [2021-11-03 04:14:57,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:14:57,107 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:14:57,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:14:57,108 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:14:57,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 04:14:57,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:14:57,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:14:57,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-03 04:14:57,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:14:57,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-03 04:14:58,397 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:58,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:15:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:15:00,736 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:15:00,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1616906907] [2021-11-03 04:15:00,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1616906907] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:15:00,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1786388580] [2021-11-03 04:15:00,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:15:00,737 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:15:00,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:15:00,738 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:15:00,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-03 04:15:01,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:15:01,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:15:01,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-03 04:15:01,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:15:02,030 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-03 04:15:02,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:15:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-03 04:15:02,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1786388580] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:15:02,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644437903] [2021-11-03 04:15:02,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:15:02,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:15:02,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:15:02,929 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:15:02,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-03 04:15:03,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:15:03,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:15:03,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-03 04:15:03,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:15:03,884 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-03 04:15:03,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:15:04,108 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-03 04:15:04,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644437903] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:15:04,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:15:04,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11, 10, 11, 10] total 38 [2021-11-03 04:15:04,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923175468] [2021-11-03 04:15:04,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-03 04:15:04,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:15:04,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-03 04:15:04,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1188, Unknown=0, NotChecked=0, Total=1406 [2021-11-03 04:15:04,111 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 38 states, 38 states have (on average 2.789473684210526) internal successors, (106), 38 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:13,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:15:13,734 INFO L93 Difference]: Finished difference Result 121 states and 137 transitions. [2021-11-03 04:15:13,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-03 04:15:13,736 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.789473684210526) internal successors, (106), 38 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-03 04:15:13,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:15:13,737 INFO L225 Difference]: With dead ends: 121 [2021-11-03 04:15:13,737 INFO L226 Difference]: Without dead ends: 103 [2021-11-03 04:15:13,739 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=595, Invalid=2711, Unknown=0, NotChecked=0, Total=3306 [2021-11-03 04:15:13,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-03 04:15:13,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 91. [2021-11-03 04:15:13,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 89 states have (on average 1.1685393258426966) internal successors, (104), 90 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:13,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 104 transitions. [2021-11-03 04:15:13,744 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 104 transitions. Word has length 32 [2021-11-03 04:15:13,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:15:13,745 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 104 transitions. [2021-11-03 04:15:13,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.789473684210526) internal successors, (106), 38 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:13,745 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 104 transitions. [2021-11-03 04:15:13,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-03 04:15:13,747 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:15:13,747 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:15:13,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-11-03 04:15:13,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-03 04:15:14,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2021-11-03 04:15:14,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:15:14,360 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-03 04:15:14,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:15:14,361 INFO L85 PathProgramCache]: Analyzing trace with hash 233432608, now seen corresponding path program 3 times [2021-11-03 04:15:14,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:15:14,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1307326216] [2021-11-03 04:15:14,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:15:14,362 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:15:14,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:15:14,363 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:15:14,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-03 04:15:15,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-03 04:15:15,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:15:15,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-03 04:15:15,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:15:15,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-03 04:15:16,177 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:15:16,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:15:17,625 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:15:17,625 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:15:17,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1307326216] [2021-11-03 04:15:17,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1307326216] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:15:17,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [542777774] [2021-11-03 04:15:17,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:15:17,626 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:15:17,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:15:17,628 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:15:17,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-03 04:15:18,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-03 04:15:18,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:15:18,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-03 04:15:18,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:15:18,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-03 04:15:19,311 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:15:19,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:15:23,297 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:15:23,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [542777774] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:15:23,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84525709] [2021-11-03 04:15:23,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:15:23,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:15:23,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:15:23,312 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:15:23,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-03 04:15:24,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-03 04:15:24,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:15:24,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-03 04:15:24,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:15:25,312 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-03 04:15:25,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:15:27,022 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-03 04:15:27,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84525709] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:15:27,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:15:27,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14, 17, 13, 12] total 60 [2021-11-03 04:15:27,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468235588] [2021-11-03 04:15:27,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-03 04:15:27,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:15:27,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-03 04:15:27,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=3194, Unknown=0, NotChecked=0, Total=3540 [2021-11-03 04:15:27,026 INFO L87 Difference]: Start difference. First operand 91 states and 104 transitions. Second operand has 60 states, 60 states have (on average 2.7) internal successors, (162), 60 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:35,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:15:35,519 INFO L93 Difference]: Finished difference Result 152 states and 170 transitions. [2021-11-03 04:15:35,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-03 04:15:35,521 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.7) internal successors, (162), 60 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-03 04:15:35,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:15:35,521 INFO L225 Difference]: With dead ends: 152 [2021-11-03 04:15:35,521 INFO L226 Difference]: Without dead ends: 91 [2021-11-03 04:15:35,523 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1335 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=792, Invalid=4908, Unknown=0, NotChecked=0, Total=5700 [2021-11-03 04:15:35,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-03 04:15:35,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-11-03 04:15:35,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 89 states have (on average 1.146067415730337) internal successors, (102), 90 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:35,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 102 transitions. [2021-11-03 04:15:35,528 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 102 transitions. Word has length 40 [2021-11-03 04:15:35,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:15:35,529 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 102 transitions. [2021-11-03 04:15:35,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.7) internal successors, (162), 60 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:35,529 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 102 transitions. [2021-11-03 04:15:35,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-03 04:15:35,531 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:15:35,531 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1] [2021-11-03 04:15:35,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-03 04:15:35,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-03 04:15:35,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-03 04:15:36,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:15:36,135 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-03 04:15:36,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:15:36,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1048882662, now seen corresponding path program 3 times [2021-11-03 04:15:36,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:15:36,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [894759516] [2021-11-03 04:15:36,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:15:36,136 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:15:36,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:15:36,137 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:15:36,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-03 04:15:36,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-03 04:15:36,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:15:36,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-03 04:15:36,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:15:36,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-03 04:15:38,199 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:15:38,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:15:42,113 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:15:42,113 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:15:42,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [894759516] [2021-11-03 04:15:42,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [894759516] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:15:42,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [965416666] [2021-11-03 04:15:42,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:15:42,114 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:15:42,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:15:42,115 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:15:42,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-03 04:15:43,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-03 04:15:43,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:15:43,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-03 04:15:43,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:15:43,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-03 04:15:45,262 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:15:45,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:16:01,832 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:16:01,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [965416666] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:16:01,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058452207] [2021-11-03 04:16:01,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:16:01,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:16:01,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:16:01,833 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:16:01,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-03 04:16:13,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-03 04:16:13,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:16:14,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-03 04:16:14,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:16:14,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-03 04:16:15,416 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:16:15,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:16:25,899 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:16:25,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058452207] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:16:25,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:16:25,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 17, 21, 19, 19] total 63 [2021-11-03 04:16:25,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743060646] [2021-11-03 04:16:25,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-03 04:16:25,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:16:25,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-03 04:16:25,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1072, Invalid=2960, Unknown=0, NotChecked=0, Total=4032 [2021-11-03 04:16:25,904 INFO L87 Difference]: Start difference. First operand 91 states and 102 transitions. Second operand has 64 states, 63 states have (on average 3.0) internal successors, (189), 64 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:18:16,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:18:16,447 INFO L93 Difference]: Finished difference Result 843 states and 946 transitions. [2021-11-03 04:18:16,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-03 04:18:16,449 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 3.0) internal successors, (189), 64 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-03 04:18:16,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:18:16,453 INFO L225 Difference]: With dead ends: 843 [2021-11-03 04:18:16,453 INFO L226 Difference]: Without dead ends: 843 [2021-11-03 04:18:16,456 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 209 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3186 ImplicationChecksByTransitivity, 68.3s TimeCoverageRelationStatistics Valid=2437, Invalid=5935, Unknown=0, NotChecked=0, Total=8372 [2021-11-03 04:18:16,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2021-11-03 04:18:16,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 139. [2021-11-03 04:18:16,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 137 states have (on average 1.1824817518248176) internal successors, (162), 138 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:18:16,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 162 transitions. [2021-11-03 04:18:16,469 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 162 transitions. Word has length 46 [2021-11-03 04:18:16,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:18:16,470 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 162 transitions. [2021-11-03 04:18:16,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 3.0) internal successors, (189), 64 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:18:16,470 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 162 transitions. [2021-11-03 04:18:16,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-03 04:18:16,472 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:18:16,472 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:18:16,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-11-03 04:18:16,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-03 04:18:16,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-11-03 04:18:17,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:18:17,084 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-03 04:18:17,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:18:17,085 INFO L85 PathProgramCache]: Analyzing trace with hash -93327962, now seen corresponding path program 4 times [2021-11-03 04:18:17,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:18:17,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1203686474] [2021-11-03 04:18:17,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:18:17,085 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:18:17,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:18:17,087 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:18:17,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-03 04:18:18,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:18:18,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:18:18,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-03 04:18:18,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:18:18,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-03 04:18:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:18:19,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:18:24,075 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 17 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:18:24,075 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:18:24,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1203686474] [2021-11-03 04:18:24,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1203686474] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:18:24,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1145994309] [2021-11-03 04:18:24,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:18:24,076 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:18:24,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:18:24,083 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:18:24,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-03 04:18:25,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:18:25,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:18:25,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-03 04:18:25,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:18:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 5 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:18:27,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:18:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 5 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:18:29,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1145994309] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:18:29,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778385706] [2021-11-03 04:18:29,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:18:29,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:18:29,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:18:29,354 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:18:29,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-03 04:18:30,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:18:30,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:18:30,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-03 04:18:30,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:18:30,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-03 04:18:32,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-03 04:18:33,009 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 5 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:18:33,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:18:37,411 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 5 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:18:37,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778385706] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:18:37,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:18:37,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 17, 16, 21, 19] total 87 [2021-11-03 04:18:37,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232821396] [2021-11-03 04:18:37,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-03 04:18:37,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:18:37,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-03 04:18:37,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=6696, Unknown=0, NotChecked=0, Total=7482 [2021-11-03 04:18:37,416 INFO L87 Difference]: Start difference. First operand 139 states and 162 transitions. Second operand has 87 states, 87 states have (on average 2.9080459770114944) internal successors, (253), 87 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:14,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:19:14,881 INFO L93 Difference]: Finished difference Result 251 states and 286 transitions. [2021-11-03 04:19:14,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-03 04:19:14,882 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.9080459770114944) internal successors, (253), 87 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-03 04:19:14,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:19:14,883 INFO L225 Difference]: With dead ends: 251 [2021-11-03 04:19:14,883 INFO L226 Difference]: Without dead ends: 209 [2021-11-03 04:19:14,887 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 195 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4281 ImplicationChecksByTransitivity, 41.7s TimeCoverageRelationStatistics Valid=1931, Invalid=11179, Unknown=0, NotChecked=0, Total=13110 [2021-11-03 04:19:14,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-03 04:19:14,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 195. [2021-11-03 04:19:14,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 193 states have (on average 1.160621761658031) internal successors, (224), 194 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:14,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 224 transitions. [2021-11-03 04:19:14,893 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 224 transitions. Word has length 48 [2021-11-03 04:19:14,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:19:14,893 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 224 transitions. [2021-11-03 04:19:14,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.9080459770114944) internal successors, (253), 87 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:14,894 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 224 transitions. [2021-11-03 04:19:14,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-03 04:19:14,897 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:19:14,897 INFO L513 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:19:14,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-03 04:19:15,126 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-03 04:19:15,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-03 04:19:15,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:19:15,503 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-03 04:19:15,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:19:15,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1330383150, now seen corresponding path program 5 times [2021-11-03 04:19:15,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:19:15,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [887712634] [2021-11-03 04:19:15,504 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-03 04:19:15,505 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:19:15,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:19:15,506 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:19:15,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-03 04:19:17,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-11-03 04:19:17,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:19:17,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-03 04:19:17,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:19:17,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-03 04:19:19,021 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 136 proven. 194 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-03 04:19:19,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:19:30,478 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:30,479 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:19:30,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [887712634] [2021-11-03 04:19:30,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [887712634] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:19:30,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1006887454] [2021-11-03 04:19:30,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-03 04:19:30,479 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:19:30,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:19:30,480 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:19:30,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-03 04:19:43,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-11-03 04:19:43,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:19:43,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-03 04:19:43,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:19:46,289 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 152 proven. 157 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-03 04:19:46,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:19:50,852 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 152 proven. 157 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-03 04:19:50,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1006887454] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:19:50,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372615513] [2021-11-03 04:19:50,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-03 04:19:50,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:19:50,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:19:50,853 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:19:50,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-03 04:20:09,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-11-03 04:20:09,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:20:09,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-03 04:20:09,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:20:09,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-03 04:20:13,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-03 04:20:13,894 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-03 04:20:13,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:20:24,193 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-03 04:20:24,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372615513] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:20:24,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:20:24,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 26, 19, 18, 23, 22] total 111 [2021-11-03 04:20:24,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251188579] [2021-11-03 04:20:24,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2021-11-03 04:20:24,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:20:24,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-11-03 04:20:24,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=11214, Unknown=0, NotChecked=0, Total=12210 [2021-11-03 04:20:24,200 INFO L87 Difference]: Start difference. First operand 195 states and 224 transitions. Second operand has 111 states, 111 states have (on average 3.099099099099099) internal successors, (344), 111 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:25,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:25,326 INFO L93 Difference]: Finished difference Result 450 states and 504 transitions. [2021-11-03 04:22:25,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-03 04:22:25,327 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 3.099099099099099) internal successors, (344), 111 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-03 04:22:25,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:25,331 INFO L225 Difference]: With dead ends: 450 [2021-11-03 04:22:25,331 INFO L226 Difference]: Without dead ends: 335 [2021-11-03 04:22:25,333 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6960 ImplicationChecksByTransitivity, 129.5s TimeCoverageRelationStatistics Valid=3368, Invalid=26044, Unknown=0, NotChecked=0, Total=29412 [2021-11-03 04:22:25,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-11-03 04:22:25,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 204. [2021-11-03 04:22:25,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 202 states have (on average 1.1485148514851484) internal successors, (232), 203 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:25,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 232 transitions. [2021-11-03 04:22:25,350 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 232 transitions. Word has length 80 [2021-11-03 04:22:25,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:25,351 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 232 transitions. [2021-11-03 04:22:25,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 3.099099099099099) internal successors, (344), 111 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:25,351 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 232 transitions. [2021-11-03 04:22:25,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-03 04:22:25,358 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:25,358 INFO L513 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:22:25,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:25,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2021-11-03 04:22:25,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:25,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:22:25,959 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-03 04:22:25,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:25,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1256677687, now seen corresponding path program 6 times [2021-11-03 04:22:25,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:25,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1467541341] [2021-11-03 04:22:25,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-03 04:22:25,960 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:25,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:25,961 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:25,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-03 04:22:28,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-03 04:22:28,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:22:28,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-03 04:22:28,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:28,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-03 04:22:31,622 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 46 proven. 395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:31,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:49,734 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:49,735 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:49,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1467541341] [2021-11-03 04:22:49,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1467541341] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:22:49,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1594777636] [2021-11-03 04:22:49,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-03 04:22:49,735 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:22:49,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:22:49,740 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:22:49,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-03 04:22:55,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-03 04:22:55,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:22:55,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-03 04:22:55,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:55,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-03 04:22:57,790 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 114 proven. 315 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-03 04:22:57,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:23:12,792 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 114 proven. 315 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-03 04:23:12,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1594777636] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:23:12,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231557572] [2021-11-03 04:23:12,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-03 04:23:12,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:23:12,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:23:12,793 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:23:12,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_398357a2-013e-4991-a1c7-3016540cb91c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-03 04:23:21,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-03 04:23:21,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:23:21,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-03 04:23:21,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:23:21,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-03 04:23:25,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-03 04:23:26,190 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 120 proven. 306 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-03 04:23:26,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:23:48,111 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 120 proven. 306 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-03 04:23:48,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231557572] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:23:48,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:23:48,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 26, 26, 29, 30] total 127 [2021-11-03 04:23:48,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540608687] [2021-11-03 04:23:48,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2021-11-03 04:23:48,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:23:48,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-11-03 04:23:48,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1413, Invalid=14589, Unknown=0, NotChecked=0, Total=16002 [2021-11-03 04:23:48,115 INFO L87 Difference]: Start difference. First operand 204 states and 232 transitions. Second operand has 127 states, 127 states have (on average 3.0) internal successors, (381), 127 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:24:28,266 WARN L207 SmtUtils]: Spent 8.59 s on a formula simplification. DAG size of input: 151 DAG size of output: 147 [2021-11-03 04:24:42,893 WARN L207 SmtUtils]: Spent 10.02 s on a formula simplification. DAG size of input: 165 DAG size of output: 161 [2021-11-03 04:25:08,770 WARN L207 SmtUtils]: Spent 11.21 s on a formula simplification. DAG size of input: 171 DAG size of output: 167 [2021-11-03 04:25:31,448 WARN L207 SmtUtils]: Spent 11.09 s on a formula simplification. DAG size of input: 173 DAG size of output: 169 [2021-11-03 04:25:52,968 WARN L207 SmtUtils]: Spent 10.95 s on a formula simplification. DAG size of input: 167 DAG size of output: 163 [2021-11-03 04:26:24,400 WARN L207 SmtUtils]: Spent 21.66 s on a formula simplification. DAG size of input: 159 DAG size of output: 155 [2021-11-03 04:26:43,333 WARN L207 SmtUtils]: Spent 10.01 s on a formula simplification. DAG size of input: 173 DAG size of output: 169 [2021-11-03 04:27:07,564 WARN L207 SmtUtils]: Spent 11.79 s on a formula simplification. DAG size of input: 167 DAG size of output: 163 [2021-11-03 04:27:35,638 WARN L207 SmtUtils]: Spent 22.32 s on a formula simplification. DAG size of input: 165 DAG size of output: 161 [2021-11-03 04:28:00,229 WARN L207 SmtUtils]: Spent 10.79 s on a formula simplification. DAG size of input: 173 DAG size of output: 169