./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_3-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b5699aa Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_3-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan --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 42bbcc36bf39908bb38d9521b1c7b6b031a006ff ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-6b5699a [2019-11-26 02:39:09,695 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:39:09,697 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:39:09,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:39:09,708 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:39:09,709 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:39:09,710 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:39:09,712 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:39:09,714 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:39:09,715 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:39:09,716 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:39:09,717 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:39:09,717 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:39:09,718 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:39:09,719 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:39:09,720 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:39:09,721 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:39:09,723 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:39:09,725 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:39:09,728 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:39:09,732 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:39:09,733 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:39:09,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:39:09,738 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:39:09,740 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:39:09,741 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:39:09,742 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:39:09,744 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:39:09,744 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:39:09,746 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:39:09,746 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:39:09,747 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:39:09,748 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:39:09,749 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:39:09,751 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:39:09,751 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:39:09,752 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:39:09,752 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:39:09,752 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:39:09,757 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:39:09,758 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:39:09,759 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2019-11-26 02:39:09,783 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:39:09,784 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:39:09,785 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:39:09,785 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:39:09,785 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:39:09,785 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:39:09,786 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:39:09,786 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:39:09,786 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:39:09,787 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-26 02:39:09,788 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-26 02:39:09,789 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:39:09,789 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:39:09,789 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-26 02:39:09,789 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:39:09,790 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:39:09,790 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:39:09,790 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-26 02:39:09,790 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-26 02:39:09,791 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-26 02:39:09,791 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:39:09,791 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-26 02:39:09,791 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-26 02:39:09,792 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-26 02:39:09,792 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:39:09,792 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-26 02:39:09,792 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:39:09,792 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-26 02:39:09,793 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:39:09,793 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:39:09,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:39:09,793 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:39:09,794 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:39:09,794 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-11-26 02:39:09,794 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-26 02:39:09,795 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:39:09,795 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan 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 -> 42bbcc36bf39908bb38d9521b1c7b6b031a006ff [2019-11-26 02:39:09,934 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:39:09,944 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:39:09,947 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:39:09,948 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:39:09,949 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:39:09,949 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_3-1.i [2019-11-26 02:39:09,993 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/data/663960449/ade621d5fe3340e291ad63306f317d2f/FLAGbd7252b8b [2019-11-26 02:39:10,487 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:39:10,487 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/sv-benchmarks/c/ldv-memsafety/memleaks_test22_3-1.i [2019-11-26 02:39:10,508 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/data/663960449/ade621d5fe3340e291ad63306f317d2f/FLAGbd7252b8b [2019-11-26 02:39:11,021 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/data/663960449/ade621d5fe3340e291ad63306f317d2f [2019-11-26 02:39:11,024 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:39:11,026 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:39:11,028 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:39:11,028 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:39:11,031 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:39:11,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:39:11" (1/1) ... [2019-11-26 02:39:11,034 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64f9d555 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:39:11, skipping insertion in model container [2019-11-26 02:39:11,034 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:39:11" (1/1) ... [2019-11-26 02:39:11,041 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:39:11,105 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:39:11,484 INFO L965 CHandler]: Found a cast between two array/pointer types where the value type is smaller than the cast-to type, and where that value type is smaller than our current memory model resolution [2019-11-26 02:39:11,484 INFO L968 CHandler]: at location: C: (struct ldv_msg*)ldv_malloc(sizeof(struct ldv_msg)) [576] [2019-11-26 02:39:11,484 INFO L969 CHandler]: current memory model: HoenickeLindenmann_4ByteResolution [2019-11-26 02:39:11,494 INFO L965 CHandler]: Found a cast between two array/pointer types where the value type is smaller than the cast-to type, and where that value type is smaller than our current memory model resolution [2019-11-26 02:39:11,494 INFO L968 CHandler]: at location: C: (typeof(*msg) *)( (char *)__mptr - ((size_t) &((typeof(*msg) *)0)->list) ) [607] [2019-11-26 02:39:11,494 INFO L969 CHandler]: current memory model: HoenickeLindenmann_4ByteResolution [2019-11-26 02:39:11,496 INFO L965 CHandler]: Found a cast between two array/pointer types where the value type is smaller than the cast-to type, and where that value type is smaller than our current memory model resolution [2019-11-26 02:39:11,497 INFO L968 CHandler]: at location: C: (typeof(*(msg)) *)( (char *)__mptr - ((size_t) &((typeof(*(msg)) *)0)->list) ) [607] [2019-11-26 02:39:11,497 INFO L969 CHandler]: current memory model: HoenickeLindenmann_4ByteResolution [2019-11-26 02:39:11,499 INFO L965 CHandler]: Found a cast between two array/pointer types where the value type is smaller than the cast-to type, and where that value type is smaller than our current memory model resolution [2019-11-26 02:39:11,499 INFO L968 CHandler]: at location: C: (typeof(*(n)) *)( (char *)__mptr - ((size_t) &((typeof(*(n)) *)0)->list) ) [607] [2019-11-26 02:39:11,499 INFO L969 CHandler]: current memory model: HoenickeLindenmann_4ByteResolution [2019-11-26 02:39:11,523 INFO L965 CHandler]: Found a cast between two array/pointer types where the value type is smaller than the cast-to type, and where that value type is smaller than our current memory model resolution [2019-11-26 02:39:11,532 INFO L968 CHandler]: at location: C: (struct ldv_kobject *)( (char *)__mptr - ((size_t) &((struct ldv_kobject *)0)->kref) ) [706] [2019-11-26 02:39:11,532 INFO L969 CHandler]: current memory model: HoenickeLindenmann_4ByteResolution [2019-11-26 02:39:11,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:39:11,575 INFO L198 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2019-11-26 02:39:11,590 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:39:11,635 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:39:11,644 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:39:11,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:39:11,782 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:39:11,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:39:11 WrapperNode [2019-11-26 02:39:11,783 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:39:11,784 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:39:11,784 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:39:11,784 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:39:11,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:39:11" (1/1) ... [2019-11-26 02:39:11,815 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:39:11" (1/1) ... [2019-11-26 02:39:11,847 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:39:11,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:39:11,847 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:39:11,847 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:39:11,855 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:39:11" (1/1) ... [2019-11-26 02:39:11,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:39:11" (1/1) ... [2019-11-26 02:39:11,860 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:39:11" (1/1) ... [2019-11-26 02:39:11,861 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:39:11" (1/1) ... [2019-11-26 02:39:11,874 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:39:11" (1/1) ... [2019-11-26 02:39:11,878 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:39:11" (1/1) ... [2019-11-26 02:39:11,882 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:39:11" (1/1) ... [2019-11-26 02:39:11,887 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:39:11,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:39:11,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:39:11,887 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:39:11,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:39:11" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:39:11,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-26 02:39:11,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-26 02:39:11,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-26 02:39:11,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-26 02:39:11,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-26 02:39:11,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-26 02:39:11,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-26 02:39:11,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-26 02:39:11,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:39:11,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:39:12,646 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:39:12,647 INFO L284 CfgBuilder]: Removed 58 assume(true) statements. [2019-11-26 02:39:12,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:39:12 BoogieIcfgContainer [2019-11-26 02:39:12,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:39:12,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:39:12,649 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:39:12,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:39:12,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:39:11" (1/3) ... [2019-11-26 02:39:12,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ac3e1a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:39:12, skipping insertion in model container [2019-11-26 02:39:12,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:39:11" (2/3) ... [2019-11-26 02:39:12,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ac3e1a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:39:12, skipping insertion in model container [2019-11-26 02:39:12,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:39:12" (3/3) ... [2019-11-26 02:39:12,655 INFO L109 eAbstractionObserver]: Analyzing ICFG memleaks_test22_3-1.i [2019-11-26 02:39:12,663 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:39:12,669 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 37 error locations. [2019-11-26 02:39:12,679 INFO L249 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2019-11-26 02:39:12,696 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:39:12,697 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-26 02:39:12,697 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:39:12,697 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:39:12,697 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:39:12,697 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:39:12,698 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:39:12,698 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:39:12,714 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states. [2019-11-26 02:39:12,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-26 02:39:12,725 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:39:12,726 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-26 02:39:12,727 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:39:12,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:39:12,733 INFO L82 PathProgramCache]: Analyzing trace with hash 889508776, now seen corresponding path program 1 times [2019-11-26 02:39:12,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:39:12,744 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1479396424] [2019-11-26 02:39:12,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:39:12,903 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:39:12,907 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:39:12,961 INFO L377 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 [2019-11-26 02:39:12,962 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:39:12,967 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:39:12,967 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:39:12,968 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 02:39:12,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:12,998 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:39:13,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:13,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1479396424] [2019-11-26 02:39:13,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:39:13,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-26 02:39:13,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005229286] [2019-11-26 02:39:13,013 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:39:13,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:39:13,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:39:13,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:39:13,028 INFO L87 Difference]: Start difference. First operand 105 states. Second operand 5 states. [2019-11-26 02:39:13,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:39:13,840 INFO L93 Difference]: Finished difference Result 320 states and 347 transitions. [2019-11-26 02:39:13,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:39:13,841 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-11-26 02:39:13,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:39:13,862 INFO L225 Difference]: With dead ends: 320 [2019-11-26 02:39:13,862 INFO L226 Difference]: Without dead ends: 312 [2019-11-26 02:39:13,863 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:39:13,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2019-11-26 02:39:13,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 106. [2019-11-26 02:39:13,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-11-26 02:39:13,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 118 transitions. [2019-11-26 02:39:13,925 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 118 transitions. Word has length 6 [2019-11-26 02:39:13,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:39:13,926 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 118 transitions. [2019-11-26 02:39:13,926 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:39:13,926 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 118 transitions. [2019-11-26 02:39:13,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-26 02:39:13,926 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:39:13,927 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-26 02:39:14,127 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:14,128 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:39:14,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:39:14,129 INFO L82 PathProgramCache]: Analyzing trace with hash 889568358, now seen corresponding path program 1 times [2019-11-26 02:39:14,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:39:14,131 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1376575116] [2019-11-26 02:39:14,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:14,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:39:14,243 INFO L255 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:39:14,243 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:39:14,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:14,261 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:39:14,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:14,263 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1376575116] [2019-11-26 02:39:14,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:39:14,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-26 02:39:14,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612536499] [2019-11-26 02:39:14,265 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:39:14,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:39:14,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:39:14,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:39:14,266 INFO L87 Difference]: Start difference. First operand 106 states and 118 transitions. Second operand 4 states. [2019-11-26 02:39:14,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:39:14,322 INFO L93 Difference]: Finished difference Result 262 states and 285 transitions. [2019-11-26 02:39:14,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:39:14,328 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2019-11-26 02:39:14,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:39:14,330 INFO L225 Difference]: With dead ends: 262 [2019-11-26 02:39:14,330 INFO L226 Difference]: Without dead ends: 262 [2019-11-26 02:39:14,331 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:39:14,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2019-11-26 02:39:14,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 104. [2019-11-26 02:39:14,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-26 02:39:14,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 115 transitions. [2019-11-26 02:39:14,349 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 115 transitions. Word has length 6 [2019-11-26 02:39:14,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:39:14,352 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 115 transitions. [2019-11-26 02:39:14,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:39:14,352 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 115 transitions. [2019-11-26 02:39:14,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-26 02:39:14,353 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:39:14,353 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:39:14,555 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:14,555 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:39:14,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:39:14,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1804968328, now seen corresponding path program 1 times [2019-11-26 02:39:14,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:39:14,556 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [329414798] [2019-11-26 02:39:14,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:39:14,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-26 02:39:14,661 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:39:14,679 INFO L377 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 [2019-11-26 02:39:14,679 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:39:14,685 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:39:14,686 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:39:14,686 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-26 02:39:14,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:14,731 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:39:14,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:14,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [329414798] [2019-11-26 02:39:14,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:39:14,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-26 02:39:14,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586485655] [2019-11-26 02:39:14,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-26 02:39:14,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:39:14,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-26 02:39:14,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-26 02:39:14,965 INFO L87 Difference]: Start difference. First operand 104 states and 115 transitions. Second operand 10 states. [2019-11-26 02:39:15,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:39:15,591 INFO L93 Difference]: Finished difference Result 261 states and 284 transitions. [2019-11-26 02:39:15,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:39:15,591 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2019-11-26 02:39:15,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:39:15,593 INFO L225 Difference]: With dead ends: 261 [2019-11-26 02:39:15,593 INFO L226 Difference]: Without dead ends: 261 [2019-11-26 02:39:15,593 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-11-26 02:39:15,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2019-11-26 02:39:15,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 103. [2019-11-26 02:39:15,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-11-26 02:39:15,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 114 transitions. [2019-11-26 02:39:15,602 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 114 transitions. Word has length 7 [2019-11-26 02:39:15,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:39:15,603 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 114 transitions. [2019-11-26 02:39:15,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-26 02:39:15,603 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 114 transitions. [2019-11-26 02:39:15,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-26 02:39:15,603 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:39:15,603 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:39:15,813 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:15,814 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:39:15,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:39:15,814 INFO L82 PathProgramCache]: Analyzing trace with hash 119421555, now seen corresponding path program 1 times [2019-11-26 02:39:15,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:39:15,815 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [936725082] [2019-11-26 02:39:15,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:15,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:39:15,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-26 02:39:15,937 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:39:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:15,961 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:39:15,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:15,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [936725082] [2019-11-26 02:39:15,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:39:15,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-26 02:39:15,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551673827] [2019-11-26 02:39:15,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:39:15,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:39:15,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:39:15,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:39:15,965 INFO L87 Difference]: Start difference. First operand 103 states and 114 transitions. Second operand 4 states. [2019-11-26 02:39:16,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:39:16,002 INFO L93 Difference]: Finished difference Result 182 states and 198 transitions. [2019-11-26 02:39:16,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-26 02:39:16,005 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-26 02:39:16,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:39:16,006 INFO L225 Difference]: With dead ends: 182 [2019-11-26 02:39:16,006 INFO L226 Difference]: Without dead ends: 182 [2019-11-26 02:39:16,007 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:39:16,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-11-26 02:39:16,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 103. [2019-11-26 02:39:16,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-11-26 02:39:16,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 113 transitions. [2019-11-26 02:39:16,018 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 113 transitions. Word has length 8 [2019-11-26 02:39:16,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:39:16,018 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 113 transitions. [2019-11-26 02:39:16,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:39:16,019 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 113 transitions. [2019-11-26 02:39:16,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-26 02:39:16,019 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:39:16,019 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:39:16,231 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:16,232 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:39:16,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:39:16,232 INFO L82 PathProgramCache]: Analyzing trace with hash 176679857, now seen corresponding path program 1 times [2019-11-26 02:39:16,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:39:16,233 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [721866889] [2019-11-26 02:39:16,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:16,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:39:16,344 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-26 02:39:16,345 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:39:16,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:16,380 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:39:16,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:16,383 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [721866889] [2019-11-26 02:39:16,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:39:16,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-26 02:39:16,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947324270] [2019-11-26 02:39:16,384 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:39:16,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:39:16,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:39:16,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:39:16,385 INFO L87 Difference]: Start difference. First operand 103 states and 113 transitions. Second operand 4 states. [2019-11-26 02:39:16,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:39:16,434 INFO L93 Difference]: Finished difference Result 241 states and 261 transitions. [2019-11-26 02:39:16,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:39:16,435 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-26 02:39:16,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:39:16,436 INFO L225 Difference]: With dead ends: 241 [2019-11-26 02:39:16,436 INFO L226 Difference]: Without dead ends: 241 [2019-11-26 02:39:16,437 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:39:16,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-11-26 02:39:16,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 105. [2019-11-26 02:39:16,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-11-26 02:39:16,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2019-11-26 02:39:16,443 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 8 [2019-11-26 02:39:16,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:39:16,443 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2019-11-26 02:39:16,443 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:39:16,444 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2019-11-26 02:39:16,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-26 02:39:16,444 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:39:16,444 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:39:16,653 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:16,654 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:39:16,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:39:16,654 INFO L82 PathProgramCache]: Analyzing trace with hash 820865718, now seen corresponding path program 1 times [2019-11-26 02:39:16,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:39:16,655 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [499872991] [2019-11-26 02:39:16,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:16,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:39:16,787 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 02:39:16,790 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:39:16,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:16,814 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:39:16,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:16,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [499872991] [2019-11-26 02:39:16,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:39:16,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-26 02:39:16,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932226559] [2019-11-26 02:39:16,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-26 02:39:16,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:39:16,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-26 02:39:16,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:39:16,830 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand 6 states. [2019-11-26 02:39:16,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:39:16,855 INFO L93 Difference]: Finished difference Result 175 states and 190 transitions. [2019-11-26 02:39:16,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:39:16,856 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-11-26 02:39:16,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:39:16,857 INFO L225 Difference]: With dead ends: 175 [2019-11-26 02:39:16,857 INFO L226 Difference]: Without dead ends: 175 [2019-11-26 02:39:16,857 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:39:16,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-26 02:39:16,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 107. [2019-11-26 02:39:16,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-11-26 02:39:16,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2019-11-26 02:39:16,860 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 12 [2019-11-26 02:39:16,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:39:16,861 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2019-11-26 02:39:16,861 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-26 02:39:16,861 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2019-11-26 02:39:16,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-26 02:39:16,861 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:39:16,862 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:39:17,063 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:17,064 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:39:17,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:39:17,064 INFO L82 PathProgramCache]: Analyzing trace with hash 2137106293, now seen corresponding path program 1 times [2019-11-26 02:39:17,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:39:17,065 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2062516692] [2019-11-26 02:39:17,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:17,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:39:17,178 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-26 02:39:17,179 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:39:17,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:17,205 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:39:17,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:17,209 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2062516692] [2019-11-26 02:39:17,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:39:17,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-26 02:39:17,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36650922] [2019-11-26 02:39:17,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:39:17,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:39:17,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:39:17,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:39:17,210 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand 5 states. [2019-11-26 02:39:17,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:39:17,264 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2019-11-26 02:39:17,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:39:17,264 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-11-26 02:39:17,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:39:17,265 INFO L225 Difference]: With dead ends: 118 [2019-11-26 02:39:17,265 INFO L226 Difference]: Without dead ends: 118 [2019-11-26 02:39:17,266 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:39:17,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-11-26 02:39:17,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2019-11-26 02:39:17,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-26 02:39:17,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 123 transitions. [2019-11-26 02:39:17,270 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 123 transitions. Word has length 12 [2019-11-26 02:39:17,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:39:17,270 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 123 transitions. [2019-11-26 02:39:17,270 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:39:17,270 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 123 transitions. [2019-11-26 02:39:17,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-26 02:39:17,271 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:39:17,271 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:39:17,473 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:17,473 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:39:17,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:39:17,474 INFO L82 PathProgramCache]: Analyzing trace with hash 976647734, now seen corresponding path program 1 times [2019-11-26 02:39:17,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:39:17,474 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1140125131] [2019-11-26 02:39:17,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:39:17,580 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:39:17,581 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:39:17,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:17,615 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:39:17,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:17,701 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1140125131] [2019-11-26 02:39:17,701 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74256999] [2019-11-26 02:39:17,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:39:17,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:39:17,778 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-26 02:39:17,779 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:39:17,785 INFO L377 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 [2019-11-26 02:39:17,785 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:39:17,787 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:39:17,787 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:39:17,787 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 02:39:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:39:17,872 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:39:17,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:39:17,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:39:17,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [6, 6] total 15 [2019-11-26 02:39:17,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680860767] [2019-11-26 02:39:17,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 02:39:17,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:39:17,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 02:39:17,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-11-26 02:39:17,879 INFO L87 Difference]: Start difference. First operand 113 states and 123 transitions. Second operand 7 states. [2019-11-26 02:39:18,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:39:18,488 INFO L93 Difference]: Finished difference Result 268 states and 287 transitions. [2019-11-26 02:39:18,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:39:18,489 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-11-26 02:39:18,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:39:18,490 INFO L225 Difference]: With dead ends: 268 [2019-11-26 02:39:18,490 INFO L226 Difference]: Without dead ends: 268 [2019-11-26 02:39:18,490 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2019-11-26 02:39:18,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2019-11-26 02:39:18,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 112. [2019-11-26 02:39:18,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-26 02:39:18,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 122 transitions. [2019-11-26 02:39:18,496 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 122 transitions. Word has length 14 [2019-11-26 02:39:18,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:39:18,496 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 122 transitions. [2019-11-26 02:39:18,496 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 02:39:18,496 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 122 transitions. [2019-11-26 02:39:18,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-26 02:39:18,497 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:39:18,497 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:39:18,910 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:39:18,910 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:39:18,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:39:18,910 INFO L82 PathProgramCache]: Analyzing trace with hash 976647735, now seen corresponding path program 1 times [2019-11-26 02:39:18,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:39:18,910 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [366326738] [2019-11-26 02:39:18,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:39:19,038 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:39:19,039 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:39:19,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:19,094 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:39:19,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:19,173 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [366326738] [2019-11-26 02:39:19,173 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841156833] [2019-11-26 02:39:19,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:39:19,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:39:19,256 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-26 02:39:19,257 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:39:19,271 INFO L377 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 [2019-11-26 02:39:19,271 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:39:19,275 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:39:19,275 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:39:19,276 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-26 02:39:19,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:39:19,441 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:39:19,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:39:19,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:39:19,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [6, 6] total 22 [2019-11-26 02:39:19,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704782075] [2019-11-26 02:39:19,955 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-26 02:39:19,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:39:19,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-26 02:39:19,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2019-11-26 02:39:19,956 INFO L87 Difference]: Start difference. First operand 112 states and 122 transitions. Second operand 14 states. [2019-11-26 02:39:20,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:39:20,772 INFO L93 Difference]: Finished difference Result 273 states and 294 transitions. [2019-11-26 02:39:20,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-26 02:39:20,773 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2019-11-26 02:39:20,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:39:20,775 INFO L225 Difference]: With dead ends: 273 [2019-11-26 02:39:20,775 INFO L226 Difference]: Without dead ends: 273 [2019-11-26 02:39:20,775 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2019-11-26 02:39:20,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2019-11-26 02:39:20,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 111. [2019-11-26 02:39:20,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-11-26 02:39:20,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2019-11-26 02:39:20,780 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 14 [2019-11-26 02:39:20,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:39:20,780 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2019-11-26 02:39:20,780 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-26 02:39:20,780 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2019-11-26 02:39:20,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-26 02:39:20,781 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:39:20,781 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:39:21,184 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:21,184 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:39:21,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:39:21,185 INFO L82 PathProgramCache]: Analyzing trace with hash 766201306, now seen corresponding path program 1 times [2019-11-26 02:39:21,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:39:21,185 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [466664510] [2019-11-26 02:39:21,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:39:21,260 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-26 02:39:21,261 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:39:21,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:21,272 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:39:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:21,274 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [466664510] [2019-11-26 02:39:21,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:39:21,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-26 02:39:21,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260487865] [2019-11-26 02:39:21,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 02:39:21,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:39:21,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 02:39:21,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:39:21,275 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand 3 states. [2019-11-26 02:39:21,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:39:21,361 INFO L93 Difference]: Finished difference Result 112 states and 121 transitions. [2019-11-26 02:39:21,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 02:39:21,362 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-26 02:39:21,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:39:21,362 INFO L225 Difference]: With dead ends: 112 [2019-11-26 02:39:21,362 INFO L226 Difference]: Without dead ends: 101 [2019-11-26 02:39:21,363 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:39:21,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-11-26 02:39:21,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2019-11-26 02:39:21,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-26 02:39:21,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 110 transitions. [2019-11-26 02:39:21,365 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 110 transitions. Word has length 14 [2019-11-26 02:39:21,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:39:21,365 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 110 transitions. [2019-11-26 02:39:21,365 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 02:39:21,365 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 110 transitions. [2019-11-26 02:39:21,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-26 02:39:21,366 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:39:21,366 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:39:21,568 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:21,568 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:39:21,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:39:21,568 INFO L82 PathProgramCache]: Analyzing trace with hash -2040718634, now seen corresponding path program 1 times [2019-11-26 02:39:21,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:39:21,569 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1274392886] [2019-11-26 02:39:21,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/cvc4 Starting monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:39:21,650 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:39:21,651 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:39:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:39:21,665 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:39:21,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:39:21,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1274392886] [2019-11-26 02:39:21,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:39:21,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-26 02:39:21,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163673952] [2019-11-26 02:39:21,669 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:39:21,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:39:21,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:39:21,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:39:21,669 INFO L87 Difference]: Start difference. First operand 101 states and 110 transitions. Second operand 5 states. [2019-11-26 02:39:21,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:39:21,699 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2019-11-26 02:39:21,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:39:21,700 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-11-26 02:39:21,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:39:21,701 INFO L225 Difference]: With dead ends: 101 [2019-11-26 02:39:21,701 INFO L226 Difference]: Without dead ends: 101 [2019-11-26 02:39:21,701 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:39:21,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-11-26 02:39:21,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2019-11-26 02:39:21,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-26 02:39:21,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2019-11-26 02:39:21,705 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 16 [2019-11-26 02:39:21,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:39:21,705 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2019-11-26 02:39:21,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:39:21,705 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2019-11-26 02:39:21,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-26 02:39:21,706 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:39:21,706 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:39:21,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:21,908 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:39:21,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:39:21,908 INFO L82 PathProgramCache]: Analyzing trace with hash -2039365097, now seen corresponding path program 1 times [2019-11-26 02:39:21,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:39:21,909 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [473338065] [2019-11-26 02:39:21,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:22,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:39:22,054 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:39:22,055 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:39:22,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:22,082 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:39:22,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:22,146 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [473338065] [2019-11-26 02:39:22,146 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176925529] [2019-11-26 02:39:22,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:39:22,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:39:22,231 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-26 02:39:22,234 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:39:22,244 INFO L377 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 [2019-11-26 02:39:22,244 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:39:22,246 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:39:22,246 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:39:22,246 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 02:39:22,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:39:22,337 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:39:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:39:22,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:39:22,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [6, 6] total 15 [2019-11-26 02:39:22,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808026419] [2019-11-26 02:39:22,342 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 02:39:22,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:39:22,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 02:39:22,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-11-26 02:39:22,342 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand 7 states. [2019-11-26 02:39:22,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:39:22,876 INFO L93 Difference]: Finished difference Result 191 states and 204 transitions. [2019-11-26 02:39:22,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:39:22,877 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-11-26 02:39:22,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:39:22,878 INFO L225 Difference]: With dead ends: 191 [2019-11-26 02:39:22,878 INFO L226 Difference]: Without dead ends: 191 [2019-11-26 02:39:22,878 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2019-11-26 02:39:22,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-11-26 02:39:22,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 99. [2019-11-26 02:39:22,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-26 02:39:22,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 107 transitions. [2019-11-26 02:39:22,881 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 107 transitions. Word has length 16 [2019-11-26 02:39:22,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:39:22,881 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 107 transitions. [2019-11-26 02:39:22,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 02:39:22,881 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 107 transitions. [2019-11-26 02:39:22,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-26 02:39:22,882 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:39:22,882 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:39:23,288 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:23,288 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:39:23,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:39:23,288 INFO L82 PathProgramCache]: Analyzing trace with hash -2039365096, now seen corresponding path program 1 times [2019-11-26 02:39:23,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:39:23,289 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1023980134] [2019-11-26 02:39:23,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/cvc4 Starting monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:23,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:39:23,419 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:39:23,420 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:39:23,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:23,450 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:39:23,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:23,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1023980134] [2019-11-26 02:39:23,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732195730] [2019-11-26 02:39:23,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:39:23,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:39:23,589 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-26 02:39:23,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:39:23,619 INFO L377 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 [2019-11-26 02:39:23,619 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:39:23,625 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:39:23,625 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:39:23,625 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-26 02:39:23,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:39:23,789 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:39:24,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:39:24,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:39:24,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [6, 6] total 22 [2019-11-26 02:39:24,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160709391] [2019-11-26 02:39:24,498 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-26 02:39:24,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:39:24,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-26 02:39:24,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2019-11-26 02:39:24,499 INFO L87 Difference]: Start difference. First operand 99 states and 107 transitions. Second operand 14 states. [2019-11-26 02:39:25,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:39:25,046 INFO L93 Difference]: Finished difference Result 177 states and 191 transitions. [2019-11-26 02:39:25,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-26 02:39:25,046 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2019-11-26 02:39:25,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:39:25,048 INFO L225 Difference]: With dead ends: 177 [2019-11-26 02:39:25,048 INFO L226 Difference]: Without dead ends: 177 [2019-11-26 02:39:25,048 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2019-11-26 02:39:25,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-11-26 02:39:25,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 97. [2019-11-26 02:39:25,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-26 02:39:25,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 105 transitions. [2019-11-26 02:39:25,051 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 105 transitions. Word has length 16 [2019-11-26 02:39:25,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:39:25,052 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 105 transitions. [2019-11-26 02:39:25,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-26 02:39:25,052 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 105 transitions. [2019-11-26 02:39:25,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-26 02:39:25,052 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:39:25,052 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:39:25,453 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:25,454 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:39:25,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:39:25,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1202804242, now seen corresponding path program 1 times [2019-11-26 02:39:25,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:39:25,455 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [525204414] [2019-11-26 02:39:25,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/cvc4 Starting monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:25,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:39:25,540 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-26 02:39:25,541 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:39:25,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:39:25,570 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:39:25,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:39:25,573 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [525204414] [2019-11-26 02:39:25,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:39:25,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2019-11-26 02:39:25,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039234613] [2019-11-26 02:39:25,573 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-26 02:39:25,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:39:25,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-26 02:39:25,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:39:25,574 INFO L87 Difference]: Start difference. First operand 97 states and 105 transitions. Second operand 6 states. [2019-11-26 02:39:25,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:39:25,637 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2019-11-26 02:39:25,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:39:25,638 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-11-26 02:39:25,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:39:25,638 INFO L225 Difference]: With dead ends: 97 [2019-11-26 02:39:25,639 INFO L226 Difference]: Without dead ends: 97 [2019-11-26 02:39:25,639 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-26 02:39:25,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-26 02:39:25,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2019-11-26 02:39:25,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-26 02:39:25,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 104 transitions. [2019-11-26 02:39:25,641 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 104 transitions. Word has length 17 [2019-11-26 02:39:25,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:39:25,641 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 104 transitions. [2019-11-26 02:39:25,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-26 02:39:25,642 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 104 transitions. [2019-11-26 02:39:25,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-26 02:39:25,642 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:39:25,642 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:39:25,846 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:25,846 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:39:25,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:39:25,846 INFO L82 PathProgramCache]: Analyzing trace with hash 208974459, now seen corresponding path program 1 times [2019-11-26 02:39:25,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:39:25,847 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2006884949] [2019-11-26 02:39:25,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/cvc4 Starting monitored process 20 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:25,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:39:25,988 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:39:25,989 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:39:26,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:26,014 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:39:26,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:26,089 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2006884949] [2019-11-26 02:39:26,089 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93621606] [2019-11-26 02:39:26,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:39:26,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:39:26,159 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-26 02:39:26,160 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:39:26,169 INFO L377 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 [2019-11-26 02:39:26,169 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:39:26,171 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:39:26,171 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:39:26,172 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 02:39:26,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:39:26,248 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:39:26,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:39:26,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:39:26,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [6, 6] total 15 [2019-11-26 02:39:26,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724378497] [2019-11-26 02:39:26,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 02:39:26,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:39:26,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 02:39:26,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-11-26 02:39:26,278 INFO L87 Difference]: Start difference. First operand 97 states and 104 transitions. Second operand 7 states. [2019-11-26 02:39:26,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:39:26,661 INFO L93 Difference]: Finished difference Result 175 states and 186 transitions. [2019-11-26 02:39:26,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:39:26,661 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2019-11-26 02:39:26,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:39:26,662 INFO L225 Difference]: With dead ends: 175 [2019-11-26 02:39:26,662 INFO L226 Difference]: Without dead ends: 175 [2019-11-26 02:39:26,663 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2019-11-26 02:39:26,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-26 02:39:26,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 95. [2019-11-26 02:39:26,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-26 02:39:26,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2019-11-26 02:39:26,666 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 21 [2019-11-26 02:39:26,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:39:26,666 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2019-11-26 02:39:26,666 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 02:39:26,666 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2019-11-26 02:39:26,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-26 02:39:26,667 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:39:26,667 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:39:27,068 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:27,068 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:39:27,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:39:27,068 INFO L82 PathProgramCache]: Analyzing trace with hash 208974460, now seen corresponding path program 1 times [2019-11-26 02:39:27,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:39:27,069 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [194894370] [2019-11-26 02:39:27,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/cvc4 Starting monitored process 22 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:27,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:39:27,230 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:39:27,231 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:39:27,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:27,262 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:39:27,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:27,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [194894370] [2019-11-26 02:39:27,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751475993] [2019-11-26 02:39:27,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:39:27,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:39:27,401 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-26 02:39:27,402 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:39:27,416 INFO L377 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 [2019-11-26 02:39:27,416 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:39:27,420 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:39:27,421 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:39:27,421 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-26 02:39:27,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:39:27,533 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:39:27,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:39:27,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:39:27,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [6, 6] total 22 [2019-11-26 02:39:27,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916384323] [2019-11-26 02:39:27,952 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-26 02:39:27,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:39:27,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-26 02:39:27,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2019-11-26 02:39:27,952 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand 14 states. [2019-11-26 02:39:28,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:39:28,502 INFO L93 Difference]: Finished difference Result 161 states and 173 transitions. [2019-11-26 02:39:28,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-26 02:39:28,504 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2019-11-26 02:39:28,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:39:28,505 INFO L225 Difference]: With dead ends: 161 [2019-11-26 02:39:28,505 INFO L226 Difference]: Without dead ends: 161 [2019-11-26 02:39:28,505 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2019-11-26 02:39:28,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-11-26 02:39:28,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 93. [2019-11-26 02:39:28,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-26 02:39:28,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2019-11-26 02:39:28,508 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 21 [2019-11-26 02:39:28,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:39:28,508 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2019-11-26 02:39:28,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-26 02:39:28,508 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2019-11-26 02:39:28,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-26 02:39:28,508 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:39:28,509 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:39:28,909 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 cvc4 --incremental --print-success --lang smt --rewrite-divk,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:39:28,909 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:39:28,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:39:28,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1667630785, now seen corresponding path program 1 times [2019-11-26 02:39:28,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:39:28,910 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1038564677] [2019-11-26 02:39:28,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/cvc4 Starting monitored process 24 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:29,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:39:29,003 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-26 02:39:29,004 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:39:29,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:39:29,030 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:39:29,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:39:29,033 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1038564677] [2019-11-26 02:39:29,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:39:29,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2019-11-26 02:39:29,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14036961] [2019-11-26 02:39:29,034 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-26 02:39:29,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:39:29,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-26 02:39:29,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:39:29,035 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand 6 states. [2019-11-26 02:39:29,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:39:29,079 INFO L93 Difference]: Finished difference Result 93 states and 99 transitions. [2019-11-26 02:39:29,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:39:29,081 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-11-26 02:39:29,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:39:29,082 INFO L225 Difference]: With dead ends: 93 [2019-11-26 02:39:29,082 INFO L226 Difference]: Without dead ends: 93 [2019-11-26 02:39:29,083 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-26 02:39:29,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-11-26 02:39:29,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2019-11-26 02:39:29,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-26 02:39:29,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2019-11-26 02:39:29,086 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 25 [2019-11-26 02:39:29,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:39:29,086 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2019-11-26 02:39:29,086 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-26 02:39:29,086 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2019-11-26 02:39:29,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-26 02:39:29,087 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:39:29,087 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:39:29,287 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:29,289 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:39:29,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:39:29,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1821512689, now seen corresponding path program 1 times [2019-11-26 02:39:29,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:39:29,290 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2076401966] [2019-11-26 02:39:29,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/cvc4 Starting monitored process 25 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:29,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:39:29,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:39:29,550 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:39:29,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:29,595 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:39:29,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:29,688 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2076401966] [2019-11-26 02:39:29,688 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453887221] [2019-11-26 02:39:29,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:39:29,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:39:29,786 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-26 02:39:29,787 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:39:29,803 INFO L377 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 [2019-11-26 02:39:29,803 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:39:29,806 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:39:29,806 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:39:29,806 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 02:39:29,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:39:29,919 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:39:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:39:29,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:39:29,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [6, 6] total 16 [2019-11-26 02:39:29,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630560670] [2019-11-26 02:39:29,928 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-26 02:39:29,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:39:29,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-26 02:39:29,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2019-11-26 02:39:29,929 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand 8 states. [2019-11-26 02:39:30,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:39:30,334 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2019-11-26 02:39:30,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-26 02:39:30,334 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2019-11-26 02:39:30,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:39:30,335 INFO L225 Difference]: With dead ends: 124 [2019-11-26 02:39:30,335 INFO L226 Difference]: Without dead ends: 124 [2019-11-26 02:39:30,336 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2019-11-26 02:39:30,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-11-26 02:39:30,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2019-11-26 02:39:30,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-26 02:39:30,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2019-11-26 02:39:30,338 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 30 [2019-11-26 02:39:30,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:39:30,338 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2019-11-26 02:39:30,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-26 02:39:30,338 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2019-11-26 02:39:30,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-26 02:39:30,339 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:39:30,339 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:39:30,739 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:30,740 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:39:30,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:39:30,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1821512688, now seen corresponding path program 1 times [2019-11-26 02:39:30,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:39:30,740 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [630384966] [2019-11-26 02:39:30,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/cvc4 Starting monitored process 27 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:30,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:39:30,950 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:39:30,951 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:39:30,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:30,978 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:39:31,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:31,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [630384966] [2019-11-26 02:39:31,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690741138] [2019-11-26 02:39:31,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:39:31,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:39:31,141 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-26 02:39:31,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:39:31,163 INFO L377 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 [2019-11-26 02:39:31,164 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:39:31,173 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:39:31,174 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:39:31,174 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-26 02:39:31,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:39:31,323 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:39:31,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:39:31,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:39:31,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [6, 6] total 24 [2019-11-26 02:39:31,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923429860] [2019-11-26 02:39:31,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-26 02:39:31,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:39:31,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-26 02:39:31,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2019-11-26 02:39:31,868 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand 16 states. [2019-11-26 02:39:32,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:39:32,576 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2019-11-26 02:39:32,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-26 02:39:32,577 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2019-11-26 02:39:32,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:39:32,577 INFO L225 Difference]: With dead ends: 95 [2019-11-26 02:39:32,577 INFO L226 Difference]: Without dead ends: 95 [2019-11-26 02:39:32,578 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2019-11-26 02:39:32,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-26 02:39:32,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2019-11-26 02:39:32,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-26 02:39:32,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2019-11-26 02:39:32,580 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 30 [2019-11-26 02:39:32,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:39:32,580 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2019-11-26 02:39:32,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-26 02:39:32,580 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2019-11-26 02:39:32,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-26 02:39:32,581 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:39:32,581 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:39:32,985 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:32,986 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:39:32,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:39:32,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1874383860, now seen corresponding path program 1 times [2019-11-26 02:39:32,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:39:32,986 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1690001664] [2019-11-26 02:39:32,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/cvc4 Starting monitored process 29 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:33,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:39:33,084 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-26 02:39:33,085 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:39:33,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:39:33,121 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:39:33,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:39:33,126 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1690001664] [2019-11-26 02:39:33,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:39:33,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2019-11-26 02:39:33,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320175527] [2019-11-26 02:39:33,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 02:39:33,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:39:33,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 02:39:33,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:39:33,127 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand 7 states. [2019-11-26 02:39:33,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:39:33,231 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2019-11-26 02:39:33,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:39:33,232 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2019-11-26 02:39:33,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:39:33,232 INFO L225 Difference]: With dead ends: 91 [2019-11-26 02:39:33,232 INFO L226 Difference]: Without dead ends: 91 [2019-11-26 02:39:33,233 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2019-11-26 02:39:33,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-26 02:39:33,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2019-11-26 02:39:33,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-26 02:39:33,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2019-11-26 02:39:33,235 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 32 [2019-11-26 02:39:33,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:39:33,235 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2019-11-26 02:39:33,235 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 02:39:33,236 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2019-11-26 02:39:33,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-26 02:39:33,236 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:39:33,236 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:39:33,437 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:33,438 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:39:33,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:39:33,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1129251155, now seen corresponding path program 1 times [2019-11-26 02:39:33,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:39:33,438 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [760127636] [2019-11-26 02:39:33,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/cvc4 Starting monitored process 30 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:39:33,657 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:39:33,658 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:39:33,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:33,683 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:39:33,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:33,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [760127636] [2019-11-26 02:39:33,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47626747] [2019-11-26 02:39:33,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:39:33,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:39:33,833 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-26 02:39:33,834 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:39:33,837 INFO L377 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 [2019-11-26 02:39:33,837 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:39:33,839 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:39:33,839 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:39:33,839 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 02:39:33,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:39:33,931 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:39:33,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:39:33,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:39:33,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [6, 6] total 17 [2019-11-26 02:39:33,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478998155] [2019-11-26 02:39:33,949 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-26 02:39:33,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:39:33,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-26 02:39:33,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2019-11-26 02:39:33,950 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 9 states. [2019-11-26 02:39:34,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:39:34,571 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2019-11-26 02:39:34,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-26 02:39:34,571 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2019-11-26 02:39:34,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:39:34,572 INFO L225 Difference]: With dead ends: 105 [2019-11-26 02:39:34,572 INFO L226 Difference]: Without dead ends: 105 [2019-11-26 02:39:34,573 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2019-11-26 02:39:34,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-26 02:39:34,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 94. [2019-11-26 02:39:34,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-11-26 02:39:34,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2019-11-26 02:39:34,575 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 36 [2019-11-26 02:39:34,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:39:34,575 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2019-11-26 02:39:34,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-26 02:39:34,576 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2019-11-26 02:39:34,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-26 02:39:34,576 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:39:34,576 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:39:34,981 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 cvc4 --incremental --print-success --lang smt --rewrite-divk,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:39:34,981 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:39:34,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:39:34,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1129251156, now seen corresponding path program 1 times [2019-11-26 02:39:34,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:39:34,982 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1848813749] [2019-11-26 02:39:34,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/cvc4 Starting monitored process 32 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:39:35,200 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:39:35,201 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:39:35,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:35,248 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:39:35,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:39:35,316 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1848813749] [2019-11-26 02:39:35,316 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592830491] [2019-11-26 02:39:35,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:39:35,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:39:35,415 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-26 02:39:35,416 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:39:35,674 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 37 [2019-11-26 02:39:35,677 INFO L343 Elim1Store]: treesize reduction 285, result has 21.5 percent of original size [2019-11-26 02:39:35,677 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 82 treesize of output 123 [2019-11-26 02:39:35,699 INFO L343 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2019-11-26 02:39:35,699 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 24 [2019-11-26 02:39:35,700 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-26 02:39:35,704 INFO L567 ElimStorePlain]: treesize reduction 13, result has 7.1 percent of original size [2019-11-26 02:39:35,705 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:39:35,706 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:39:35,706 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:39:35,706 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:1 [2019-11-26 02:39:35,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:39:35,708 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:39:36,188 WARN L192 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 64 [2019-11-26 02:39:36,189 INFO L343 Elim1Store]: treesize reduction 375, result has 27.9 percent of original size [2019-11-26 02:39:36,190 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 121 treesize of output 167 [2019-11-26 02:39:36,199 INFO L343 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2019-11-26 02:39:36,200 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 95 treesize of output 57 [2019-11-26 02:39:36,201 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-26 02:39:36,203 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:39:36,204 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-26 02:39:36,210 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:39:36,211 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-26 02:39:36,211 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:121, output treesize:44 [2019-11-26 02:39:36,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:39:36,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:39:36,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 8] imperfect sequences [6, 6] total 19 [2019-11-26 02:39:36,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566415917] [2019-11-26 02:39:36,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-26 02:39:36,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:39:36,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-26 02:39:36,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2019-11-26 02:39:36,281 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand 11 states. [2019-11-26 02:39:36,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:39:36,452 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2019-11-26 02:39:36,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:39:36,452 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2019-11-26 02:39:36,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:39:36,452 INFO L225 Difference]: With dead ends: 32 [2019-11-26 02:39:36,452 INFO L226 Difference]: Without dead ends: 0 [2019-11-26 02:39:36,453 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2019-11-26 02:39:36,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-26 02:39:36,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-26 02:39:36,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-26 02:39:36,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-26 02:39:36,454 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2019-11-26 02:39:36,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:39:36,454 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-26 02:39:36,454 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-26 02:39:36,454 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-26 02:39:36,454 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-26 02:39:36,855 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:39:36,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:39:36 BoogieIcfgContainer [2019-11-26 02:39:36,858 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:39:36,858 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:39:36,858 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:39:36,859 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:39:36,859 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:39:12" (3/4) ... [2019-11-26 02:39:36,862 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-26 02:39:36,882 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 39 nodes and edges [2019-11-26 02:39:36,883 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2019-11-26 02:39:36,883 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-11-26 02:39:36,884 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-11-26 02:39:36,948 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d4623a22-e24e-4ddc-a539-8da5e0e0160b/bin/utaipan/witness.graphml [2019-11-26 02:39:36,950 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:39:36,951 INFO L168 Benchmark]: Toolchain (without parser) took 25925.71 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 314.0 MB). Free memory was 939.4 MB in the beginning and 1.2 GB in the end (delta: -281.2 MB). Peak memory consumption was 32.8 MB. Max. memory is 11.5 GB. [2019-11-26 02:39:36,951 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:39:36,952 INFO L168 Benchmark]: CACSL2BoogieTranslator took 756.07 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 93.3 MB). Free memory was 939.4 MB in the beginning and 1.0 GB in the end (delta: -100.7 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:39:36,952 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.94 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:39:36,952 INFO L168 Benchmark]: Boogie Preprocessor took 39.72 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:39:36,953 INFO L168 Benchmark]: RCFGBuilder took 760.94 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 983.1 MB in the end (delta: 50.1 MB). Peak memory consumption was 50.1 MB. Max. memory is 11.5 GB. [2019-11-26 02:39:36,953 INFO L168 Benchmark]: TraceAbstraction took 24209.29 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 220.7 MB). Free memory was 983.1 MB in the beginning and 1.2 GB in the end (delta: -251.7 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:39:36,953 INFO L168 Benchmark]: Witness Printer took 91.60 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 11.5 GB. [2019-11-26 02:39:36,955 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 756.07 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 93.3 MB). Free memory was 939.4 MB in the beginning and 1.0 GB in the end (delta: -100.7 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 62.94 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 39.72 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. * RCFGBuilder took 760.94 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 983.1 MB in the end (delta: 50.1 MB). Peak memory consumption was 50.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 24209.29 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 220.7 MB). Free memory was 983.1 MB in the beginning and 1.2 GB in the end (delta: -251.7 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 91.60 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 666]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 702]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 666]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 700]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 540]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 682]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 682]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 541]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 700]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 699]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 702]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 541]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 540]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 668]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 700]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 702]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 658]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 668]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 658]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 699]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 770]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 666]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 660]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 702]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 700]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 660]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 668]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 668]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 702]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 666]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 699]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 699]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 700]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 700]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 702]: free always succeeds For all program executions holds that free always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 37 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 105 locations, 37 error locations. Result: SAFE, OverallTime: 24.1s, OverallIterations: 22, TraceHistogramMax: 2, AutomataDifference: 7.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 2637 SDtfs, 7967 SDslu, 3935 SDs, 0 SdLazy, 2047 SolverSat, 69 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1266 GetRequests, 988 SyntacticMatches, 2 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 6.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=113occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 22 MinimizatonAttempts, 1492 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 6.1s InterpolantComputationTime, 631 NumberOfCodeBlocks, 631 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 1198 ConstructedInterpolants, 1 QuantifiedInterpolants, 123801 SizeOfPredicates, 264 NumberOfNonLiveVariables, 3696 ConjunctsInSsa, 329 ConjunctsInUnsatCore, 64 InterpolantComputations, 44 PerfectInterpolantSequences, 84/144 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...