./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_1-2.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_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_1-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/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 7c0f55efd94c93e17f9b5d2997faae48611cbba6 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 02:16:13,610 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:16:13,612 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:16:13,627 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:16:13,627 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:16:13,628 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:16:13,630 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:16:13,638 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:16:13,643 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:16:13,647 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:16:13,647 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:16:13,649 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:16:13,650 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:16:13,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:16:13,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:16:13,654 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:16:13,655 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:16:13,656 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:16:13,658 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:16:13,661 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:16:13,665 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:16:13,668 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:16:13,670 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:16:13,671 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:16:13,673 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:16:13,673 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:16:13,674 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:16:13,675 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:16:13,676 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:16:13,677 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:16:13,677 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:16:13,678 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:16:13,679 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:16:13,680 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:16:13,681 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:16:13,681 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:16:13,681 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:16:13,681 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:16:13,682 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:16:13,683 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:16:13,684 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:16:13,685 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2019-11-26 02:16:13,709 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:16:13,719 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:16:13,720 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:16:13,720 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:16:13,720 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:16:13,721 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:16:13,721 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:16:13,721 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:16:13,721 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:16:13,722 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-26 02:16:13,722 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-26 02:16:13,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:16:13,723 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:16:13,723 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-26 02:16:13,723 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:16:13,723 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:16:13,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:16:13,724 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-26 02:16:13,725 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-26 02:16:13,725 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-26 02:16:13,725 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:16:13,726 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-26 02:16:13,726 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-26 02:16:13,726 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-26 02:16:13,726 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:16:13,726 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-26 02:16:13,727 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:16:13,727 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-26 02:16:13,728 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:16:13,728 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:16:13,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:16:13,728 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:16:13,729 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:16:13,729 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-11-26 02:16:13,729 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-26 02:16:13,729 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:16:13,730 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_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/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 -> 7c0f55efd94c93e17f9b5d2997faae48611cbba6 [2019-11-26 02:16:13,902 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:16:13,919 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:16:13,922 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:16:13,924 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:16:13,924 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:16:13,925 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_1-2.i [2019-11-26 02:16:13,984 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/bin/utaipan/data/bdde300e9/2e75b656ea6e424eae501bbc0aadd30a/FLAG9d8965ba4 [2019-11-26 02:16:14,496 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:16:14,497 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/sv-benchmarks/c/ldv-memsafety/memleaks_test22_1-2.i [2019-11-26 02:16:14,520 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/bin/utaipan/data/bdde300e9/2e75b656ea6e424eae501bbc0aadd30a/FLAG9d8965ba4 [2019-11-26 02:16:14,818 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/bin/utaipan/data/bdde300e9/2e75b656ea6e424eae501bbc0aadd30a [2019-11-26 02:16:14,821 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:16:14,822 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:16:14,831 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:16:14,832 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:16:14,835 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:16:14,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:16:14" (1/1) ... [2019-11-26 02:16:14,839 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32189cf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:16:14, skipping insertion in model container [2019-11-26 02:16:14,839 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:16:14" (1/1) ... [2019-11-26 02:16:14,846 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:16:14,888 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:16:15,355 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 02:16:15,356 INFO L968 CHandler]: at location: C: (struct ldv_msg*)ldv_malloc(sizeof(struct ldv_msg)) [576] [2019-11-26 02:16:15,356 INFO L969 CHandler]: current memory model: HoenickeLindenmann_4ByteResolution [2019-11-26 02:16:15,379 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 02:16:15,379 INFO L968 CHandler]: at location: C: (typeof(*msg) *)( (char *)__mptr - ((size_t) &((typeof(*msg) *)0)->list) ) [607] [2019-11-26 02:16:15,380 INFO L969 CHandler]: current memory model: HoenickeLindenmann_4ByteResolution [2019-11-26 02:16:15,383 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 02:16:15,384 INFO L968 CHandler]: at location: C: (typeof(*(msg)) *)( (char *)__mptr - ((size_t) &((typeof(*(msg)) *)0)->list) ) [607] [2019-11-26 02:16:15,384 INFO L969 CHandler]: current memory model: HoenickeLindenmann_4ByteResolution [2019-11-26 02:16:15,387 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 02:16:15,388 INFO L968 CHandler]: at location: C: (typeof(*(n)) *)( (char *)__mptr - ((size_t) &((typeof(*(n)) *)0)->list) ) [607] [2019-11-26 02:16:15,388 INFO L969 CHandler]: current memory model: HoenickeLindenmann_4ByteResolution [2019-11-26 02:16:15,426 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 02:16:15,426 INFO L968 CHandler]: at location: C: (struct ldv_kobject *)( (char *)__mptr - ((size_t) &((struct ldv_kobject *)0)->kref) ) [706] [2019-11-26 02:16:15,427 INFO L969 CHandler]: current memory model: HoenickeLindenmann_4ByteResolution [2019-11-26 02:16:15,444 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:16:15,467 INFO L198 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2019-11-26 02:16:15,505 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:16:15,577 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:16:15,586 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:16:15,632 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:16:15,717 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:16:15,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:16:15 WrapperNode [2019-11-26 02:16:15,718 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:16:15,718 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:16:15,719 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:16:15,721 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:16:15,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:16:15" (1/1) ... [2019-11-26 02:16:15,757 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:16:15" (1/1) ... [2019-11-26 02:16:15,783 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:16:15,783 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:16:15,784 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:16:15,785 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:16:15,794 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:16:15" (1/1) ... [2019-11-26 02:16:15,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:16:15" (1/1) ... [2019-11-26 02:16:15,811 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:16:15" (1/1) ... [2019-11-26 02:16:15,818 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:16:15" (1/1) ... [2019-11-26 02:16:15,829 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:16:15" (1/1) ... [2019-11-26 02:16:15,848 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:16:15" (1/1) ... [2019-11-26 02:16:15,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:16:15" (1/1) ... [2019-11-26 02:16:15,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:16:15,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:16:15,856 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:16:15,856 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:16:15,857 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:16:15" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/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 02:16:15,904 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-26 02:16:15,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-26 02:16:15,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-26 02:16:15,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-26 02:16:15,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-26 02:16:15,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-26 02:16:15,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-26 02:16:15,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-26 02:16:15,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:16:15,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:16:16,450 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:16:16,450 INFO L284 CfgBuilder]: Removed 34 assume(true) statements. [2019-11-26 02:16:16,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:16:16 BoogieIcfgContainer [2019-11-26 02:16:16,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:16:16,452 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:16:16,452 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:16:16,454 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:16:16,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:16:14" (1/3) ... [2019-11-26 02:16:16,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@511a89b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:16:16, skipping insertion in model container [2019-11-26 02:16:16,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:16:15" (2/3) ... [2019-11-26 02:16:16,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@511a89b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:16:16, skipping insertion in model container [2019-11-26 02:16:16,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:16:16" (3/3) ... [2019-11-26 02:16:16,459 INFO L109 eAbstractionObserver]: Analyzing ICFG memleaks_test22_1-2.i [2019-11-26 02:16:16,468 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:16:16,475 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2019-11-26 02:16:16,485 INFO L249 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2019-11-26 02:16:16,505 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:16:16,505 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-26 02:16:16,505 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:16:16,505 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:16:16,505 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:16:16,505 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:16:16,505 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:16:16,506 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:16:16,518 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2019-11-26 02:16:16,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-26 02:16:16,523 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:16:16,524 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-26 02:16:16,524 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:16:16,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:16:16,529 INFO L82 PathProgramCache]: Analyzing trace with hash 889508776, now seen corresponding path program 1 times [2019-11-26 02:16:16,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:16:16,538 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [267117734] [2019-11-26 02:16:16,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/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 02:16:16,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:16:16,675 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:16:16,679 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:16:16,723 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 02:16:16,723 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:16:16,730 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:16:16,730 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:16:16,731 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 02:16:16,759 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 02:16:16,760 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:16:16,765 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 02:16:16,766 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [267117734] [2019-11-26 02:16:16,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:16:16,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-26 02:16:16,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735371161] [2019-11-26 02:16:16,771 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:16:16,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:16:16,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:16:16,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:16:16,787 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 5 states. [2019-11-26 02:16:17,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:16:17,238 INFO L93 Difference]: Finished difference Result 164 states and 178 transitions. [2019-11-26 02:16:17,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:16:17,240 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-11-26 02:16:17,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:16:17,251 INFO L225 Difference]: With dead ends: 164 [2019-11-26 02:16:17,251 INFO L226 Difference]: Without dead ends: 156 [2019-11-26 02:16:17,256 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 02:16:17,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-11-26 02:16:17,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 61. [2019-11-26 02:16:17,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-26 02:16:17,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2019-11-26 02:16:17,310 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 6 [2019-11-26 02:16:17,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:16:17,310 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2019-11-26 02:16:17,310 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:16:17,310 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2019-11-26 02:16:17,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-26 02:16:17,311 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:16:17,311 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-26 02:16:17,514 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:16:17,514 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:16:17,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:16:17,514 INFO L82 PathProgramCache]: Analyzing trace with hash 889568358, now seen corresponding path program 1 times [2019-11-26 02:16:17,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:16:17,515 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1064972321] [2019-11-26 02:16:17,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/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 02:16:17,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:16:17,612 INFO L255 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:16:17,613 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:16:17,642 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 02:16:17,642 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:16:17,644 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 02:16:17,644 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1064972321] [2019-11-26 02:16:17,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:16:17,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-26 02:16:17,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270418977] [2019-11-26 02:16:17,646 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:16:17,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:16:17,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:16:17,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:16:17,647 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 4 states. [2019-11-26 02:16:17,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:16:17,693 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2019-11-26 02:16:17,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:16:17,694 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2019-11-26 02:16:17,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:16:17,695 INFO L225 Difference]: With dead ends: 127 [2019-11-26 02:16:17,696 INFO L226 Difference]: Without dead ends: 127 [2019-11-26 02:16:17,696 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 02:16:17,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-11-26 02:16:17,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 59. [2019-11-26 02:16:17,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-26 02:16:17,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2019-11-26 02:16:17,705 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 6 [2019-11-26 02:16:17,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:16:17,705 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2019-11-26 02:16:17,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:16:17,705 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2019-11-26 02:16:17,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-26 02:16:17,706 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:16:17,706 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:16:17,916 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:16:17,917 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:16:17,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:16:17,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1804968328, now seen corresponding path program 1 times [2019-11-26 02:16:17,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:16:17,918 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1438279479] [2019-11-26 02:16:17,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/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 02:16:18,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:16:18,025 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-26 02:16:18,026 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:16:18,045 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 02:16:18,046 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:16:18,052 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:16:18,053 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:16:18,053 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-26 02:16:18,107 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 02:16:18,107 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:16:18,349 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 02:16:18,349 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1438279479] [2019-11-26 02:16:18,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:16:18,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-26 02:16:18,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276569037] [2019-11-26 02:16:18,350 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-26 02:16:18,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:16:18,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-26 02:16:18,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-26 02:16:18,351 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 10 states. [2019-11-26 02:16:18,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:16:18,795 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2019-11-26 02:16:18,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:16:18,796 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2019-11-26 02:16:18,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:16:18,797 INFO L225 Difference]: With dead ends: 126 [2019-11-26 02:16:18,797 INFO L226 Difference]: Without dead ends: 126 [2019-11-26 02:16:18,798 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 02:16:18,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-11-26 02:16:18,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 58. [2019-11-26 02:16:18,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-26 02:16:18,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2019-11-26 02:16:18,805 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 7 [2019-11-26 02:16:18,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:16:18,805 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2019-11-26 02:16:18,805 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-26 02:16:18,805 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2019-11-26 02:16:18,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-26 02:16:18,806 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:16:18,806 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:16:19,006 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:16:19,007 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:16:19,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:16:19,007 INFO L82 PathProgramCache]: Analyzing trace with hash 119423029, now seen corresponding path program 1 times [2019-11-26 02:16:19,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:16:19,008 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [774749787] [2019-11-26 02:16:19,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/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 02:16:19,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:16:19,093 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-26 02:16:19,094 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:16:19,108 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 02:16:19,108 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:16:19,110 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 02:16:19,111 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [774749787] [2019-11-26 02:16:19,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:16:19,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-26 02:16:19,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380064434] [2019-11-26 02:16:19,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:16:19,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:16:19,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:16:19,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:16:19,112 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 4 states. [2019-11-26 02:16:19,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:16:19,144 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2019-11-26 02:16:19,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-26 02:16:19,147 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-26 02:16:19,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:16:19,148 INFO L225 Difference]: With dead ends: 92 [2019-11-26 02:16:19,148 INFO L226 Difference]: Without dead ends: 92 [2019-11-26 02:16:19,149 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 02:16:19,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-26 02:16:19,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 58. [2019-11-26 02:16:19,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-26 02:16:19,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2019-11-26 02:16:19,159 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 8 [2019-11-26 02:16:19,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:16:19,160 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2019-11-26 02:16:19,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:16:19,160 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2019-11-26 02:16:19,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-26 02:16:19,161 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:16:19,161 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:16:19,363 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:16:19,364 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:16:19,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:16:19,364 INFO L82 PathProgramCache]: Analyzing trace with hash 176681331, now seen corresponding path program 1 times [2019-11-26 02:16:19,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:16:19,364 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [350943536] [2019-11-26 02:16:19,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/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 02:16:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:16:19,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-26 02:16:19,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:16:19,455 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 02:16:19,455 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:16:19,457 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 02:16:19,457 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [350943536] [2019-11-26 02:16:19,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:16:19,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-26 02:16:19,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985442364] [2019-11-26 02:16:19,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 02:16:19,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:16:19,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 02:16:19,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:16:19,458 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 3 states. [2019-11-26 02:16:19,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:16:19,551 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2019-11-26 02:16:19,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 02:16:19,551 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-26 02:16:19,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:16:19,552 INFO L225 Difference]: With dead ends: 83 [2019-11-26 02:16:19,552 INFO L226 Difference]: Without dead ends: 80 [2019-11-26 02:16:19,553 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 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 02:16:19,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-26 02:16:19,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2019-11-26 02:16:19,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-26 02:16:19,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2019-11-26 02:16:19,558 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 8 [2019-11-26 02:16:19,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:16:19,558 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2019-11-26 02:16:19,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 02:16:19,558 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2019-11-26 02:16:19,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-26 02:16:19,559 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:16:19,559 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:16:19,760 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:16:19,761 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:16:19,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:16:19,761 INFO L82 PathProgramCache]: Analyzing trace with hash 176679857, now seen corresponding path program 1 times [2019-11-26 02:16:19,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:16:19,762 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [619629966] [2019-11-26 02:16:19,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/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 02:16:19,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:16:19,889 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-26 02:16:19,890 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:16:19,912 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 02:16:19,912 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:16:19,914 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 02:16:19,915 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [619629966] [2019-11-26 02:16:19,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:16:19,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-26 02:16:19,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066670661] [2019-11-26 02:16:19,916 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:16:19,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:16:19,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:16:19,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:16:19,916 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand 4 states. [2019-11-26 02:16:19,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:16:19,946 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2019-11-26 02:16:19,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:16:19,946 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-26 02:16:19,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:16:19,947 INFO L225 Difference]: With dead ends: 62 [2019-11-26 02:16:19,947 INFO L226 Difference]: Without dead ends: 58 [2019-11-26 02:16:19,948 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 02:16:19,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-26 02:16:19,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2019-11-26 02:16:19,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-26 02:16:19,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2019-11-26 02:16:19,952 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 8 [2019-11-26 02:16:19,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:16:19,953 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2019-11-26 02:16:19,953 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:16:19,953 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2019-11-26 02:16:19,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-26 02:16:19,953 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:16:19,954 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:16:20,154 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:16:20,155 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:16:20,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:16:20,155 INFO L82 PathProgramCache]: Analyzing trace with hash 820865718, now seen corresponding path program 1 times [2019-11-26 02:16:20,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:16:20,155 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [174584918] [2019-11-26 02:16:20,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/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 02:16:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:16:20,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 02:16:20,290 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:16:20,308 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 02:16:20,308 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:16:20,326 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 02:16:20,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [174584918] [2019-11-26 02:16:20,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:16:20,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-26 02:16:20,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732080003] [2019-11-26 02:16:20,327 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-26 02:16:20,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:16:20,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-26 02:16:20,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:16:20,327 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 6 states. [2019-11-26 02:16:20,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:16:20,360 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2019-11-26 02:16:20,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:16:20,360 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-11-26 02:16:20,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:16:20,361 INFO L225 Difference]: With dead ends: 58 [2019-11-26 02:16:20,361 INFO L226 Difference]: Without dead ends: 58 [2019-11-26 02:16:20,361 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 02:16:20,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-26 02:16:20,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-11-26 02:16:20,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-26 02:16:20,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2019-11-26 02:16:20,365 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 12 [2019-11-26 02:16:20,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:16:20,365 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2019-11-26 02:16:20,365 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-26 02:16:20,365 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2019-11-26 02:16:20,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-26 02:16:20,366 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:16:20,366 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:16:20,567 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:16:20,568 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:16:20,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:16:20,569 INFO L82 PathProgramCache]: Analyzing trace with hash 976647734, now seen corresponding path program 1 times [2019-11-26 02:16:20,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:16:20,569 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1137616967] [2019-11-26 02:16:20,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/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 02:16:20,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:16:20,673 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:16:20,674 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:16:20,705 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 02:16:20,705 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:16:20,775 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 02:16:20,775 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1137616967] [2019-11-26 02:16:20,775 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704009760] [2019-11-26 02:16:20,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/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 02:16:20,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:16:20,845 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-26 02:16:20,846 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:16:20,855 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 02:16:20,855 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:16:20,857 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:16:20,857 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:16:20,858 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 02:16:20,949 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 02:16:20,949 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:16:20,955 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 02:16:20,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:16:20,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [6, 6] total 15 [2019-11-26 02:16:20,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952655683] [2019-11-26 02:16:20,956 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 02:16:20,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:16:20,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 02:16:20,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-11-26 02:16:20,961 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 7 states. [2019-11-26 02:16:21,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:16:21,282 INFO L93 Difference]: Finished difference Result 115 states and 121 transitions. [2019-11-26 02:16:21,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:16:21,282 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-11-26 02:16:21,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:16:21,283 INFO L225 Difference]: With dead ends: 115 [2019-11-26 02:16:21,283 INFO L226 Difference]: Without dead ends: 115 [2019-11-26 02:16:21,284 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 02:16:21,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-26 02:16:21,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 57. [2019-11-26 02:16:21,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-26 02:16:21,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2019-11-26 02:16:21,289 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 14 [2019-11-26 02:16:21,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:16:21,289 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2019-11-26 02:16:21,290 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 02:16:21,290 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2019-11-26 02:16:21,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-26 02:16:21,290 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:16:21,290 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:16:21,695 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 02:16:21,696 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:16:21,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:16:21,696 INFO L82 PathProgramCache]: Analyzing trace with hash 976647735, now seen corresponding path program 1 times [2019-11-26 02:16:21,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:16:21,697 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [247142575] [2019-11-26 02:16:21,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/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 02:16:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:16:21,825 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:16:21,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:16:21,897 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 02:16:21,897 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:16:21,983 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 02:16:21,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [247142575] [2019-11-26 02:16:21,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122186248] [2019-11-26 02:16:21,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/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 02:16:22,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:16:22,055 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-26 02:16:22,057 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:16:22,084 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 02:16:22,084 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:16:22,090 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:16:22,090 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:16:22,091 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-26 02:16:22,208 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 02:16:22,208 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:16:22,650 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 02:16:22,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:16:22,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [6, 6] total 22 [2019-11-26 02:16:22,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407218304] [2019-11-26 02:16:22,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-26 02:16:22,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:16:22,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-26 02:16:22,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2019-11-26 02:16:22,652 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 14 states. [2019-11-26 02:16:23,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:16:23,151 INFO L93 Difference]: Finished difference Result 126 states and 135 transitions. [2019-11-26 02:16:23,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-26 02:16:23,165 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2019-11-26 02:16:23,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:16:23,166 INFO L225 Difference]: With dead ends: 126 [2019-11-26 02:16:23,166 INFO L226 Difference]: Without dead ends: 126 [2019-11-26 02:16:23,167 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2019-11-26 02:16:23,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-11-26 02:16:23,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 56. [2019-11-26 02:16:23,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-26 02:16:23,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2019-11-26 02:16:23,171 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 14 [2019-11-26 02:16:23,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:16:23,171 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2019-11-26 02:16:23,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-26 02:16:23,171 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2019-11-26 02:16:23,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-26 02:16:23,172 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:16:23,172 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:16:23,572 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 02:16:23,573 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:16:23,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:16:23,573 INFO L82 PathProgramCache]: Analyzing trace with hash -2040717160, now seen corresponding path program 1 times [2019-11-26 02:16:23,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:16:23,573 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1202397323] [2019-11-26 02:16:23,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/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 02:16:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:16:23,647 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:16:23,648 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:16:23,674 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 02:16:23,675 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:16:23,677 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 02:16:23,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1202397323] [2019-11-26 02:16:23,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:16:23,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-26 02:16:23,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429626917] [2019-11-26 02:16:23,678 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:16:23,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:16:23,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:16:23,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:16:23,679 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 5 states. [2019-11-26 02:16:23,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:16:23,712 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2019-11-26 02:16:23,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:16:23,713 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-11-26 02:16:23,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:16:23,713 INFO L225 Difference]: With dead ends: 56 [2019-11-26 02:16:23,714 INFO L226 Difference]: Without dead ends: 56 [2019-11-26 02:16:23,714 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 02:16:23,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-26 02:16:23,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-26 02:16:23,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-26 02:16:23,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2019-11-26 02:16:23,717 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 16 [2019-11-26 02:16:23,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:16:23,717 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2019-11-26 02:16:23,717 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:16:23,717 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2019-11-26 02:16:23,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-26 02:16:23,718 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:16:23,718 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:16:23,919 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:16:23,921 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:16:23,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:16:23,924 INFO L82 PathProgramCache]: Analyzing trace with hash -2039365097, now seen corresponding path program 1 times [2019-11-26 02:16:23,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:16:23,924 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1810386325] [2019-11-26 02:16:23,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/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 02:16:24,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:16:24,045 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:16:24,046 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:16:24,077 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 02:16:24,078 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:16:24,140 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 02:16:24,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1810386325] [2019-11-26 02:16:24,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151802824] [2019-11-26 02:16:24,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/bin/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:16:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:16:24,200 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-26 02:16:24,201 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:16:24,206 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 02:16:24,206 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:16:24,208 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:16:24,209 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:16:24,209 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 02:16:24,289 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 02:16:24,289 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:16:24,293 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 02:16:24,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:16:24,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [6, 6] total 15 [2019-11-26 02:16:24,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430097589] [2019-11-26 02:16:24,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 02:16:24,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:16:24,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 02:16:24,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-11-26 02:16:24,295 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 7 states. [2019-11-26 02:16:24,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:16:24,568 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2019-11-26 02:16:24,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:16:24,569 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-11-26 02:16:24,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:16:24,570 INFO L225 Difference]: With dead ends: 85 [2019-11-26 02:16:24,570 INFO L226 Difference]: Without dead ends: 85 [2019-11-26 02:16:24,571 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 02:16:24,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-26 02:16:24,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 54. [2019-11-26 02:16:24,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-26 02:16:24,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2019-11-26 02:16:24,574 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 16 [2019-11-26 02:16:24,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:16:24,574 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2019-11-26 02:16:24,574 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 02:16:24,574 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2019-11-26 02:16:24,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-26 02:16:24,575 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:16:24,575 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:16:24,977 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt --rewrite-divk,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:16:24,977 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:16:24,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:16:24,977 INFO L82 PathProgramCache]: Analyzing trace with hash -2039365096, now seen corresponding path program 1 times [2019-11-26 02:16:24,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:16:24,978 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1843975491] [2019-11-26 02:16:24,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/bin/utaipan/cvc4 Starting monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:16:25,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:16:25,121 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:16:25,122 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:16:25,156 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 02:16:25,157 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:16:25,244 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 02:16:25,244 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1843975491] [2019-11-26 02:16:25,244 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651595164] [2019-11-26 02:16:25,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/bin/utaipan/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:16:25,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:16:25,314 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-26 02:16:25,315 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:16:25,341 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 02:16:25,341 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:16:25,351 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:16:25,352 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:16:25,352 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-26 02:16:25,498 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 02:16:25,498 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:16:26,004 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 02:16:26,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:16:26,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [6, 6] total 22 [2019-11-26 02:16:26,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073141449] [2019-11-26 02:16:26,005 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-26 02:16:26,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:16:26,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-26 02:16:26,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2019-11-26 02:16:26,006 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 14 states. [2019-11-26 02:16:26,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:16:26,384 INFO L93 Difference]: Finished difference Result 87 states and 93 transitions. [2019-11-26 02:16:26,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-26 02:16:26,384 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2019-11-26 02:16:26,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:16:26,385 INFO L225 Difference]: With dead ends: 87 [2019-11-26 02:16:26,385 INFO L226 Difference]: Without dead ends: 87 [2019-11-26 02:16:26,386 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 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 02:16:26,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-26 02:16:26,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 52. [2019-11-26 02:16:26,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-26 02:16:26,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2019-11-26 02:16:26,388 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 16 [2019-11-26 02:16:26,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:16:26,389 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2019-11-26 02:16:26,389 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-26 02:16:26,389 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2019-11-26 02:16:26,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-26 02:16:26,389 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:16:26,389 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:16:26,790 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 cvc4 --incremental --print-success --lang smt --rewrite-divk,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:16:26,790 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:16:26,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:16:26,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1202805716, now seen corresponding path program 1 times [2019-11-26 02:16:26,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:16:26,791 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [717385479] [2019-11-26 02:16:26,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/bin/utaipan/cvc4 Starting monitored process 18 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:16:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:16:26,872 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-26 02:16:26,873 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:16:26,900 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 02:16:26,901 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:16:26,903 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 02:16:26,903 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [717385479] [2019-11-26 02:16:26,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:16:26,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2019-11-26 02:16:26,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535162551] [2019-11-26 02:16:26,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-26 02:16:26,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:16:26,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-26 02:16:26,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:16:26,905 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 6 states. [2019-11-26 02:16:26,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:16:26,960 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2019-11-26 02:16:26,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:16:26,961 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-11-26 02:16:26,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:16:26,961 INFO L225 Difference]: With dead ends: 52 [2019-11-26 02:16:26,961 INFO L226 Difference]: Without dead ends: 52 [2019-11-26 02:16:26,962 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 02:16:26,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-26 02:16:26,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-11-26 02:16:26,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-26 02:16:26,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2019-11-26 02:16:26,963 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 17 [2019-11-26 02:16:26,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:16:26,963 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2019-11-26 02:16:26,963 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-26 02:16:26,963 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2019-11-26 02:16:26,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-26 02:16:26,964 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:16:26,964 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 02:16:27,164 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:16:27,165 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:16:27,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:16:27,165 INFO L82 PathProgramCache]: Analyzing trace with hash 208975933, now seen corresponding path program 1 times [2019-11-26 02:16:27,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:16:27,165 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1446601537] [2019-11-26 02:16:27,165 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/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 02:16:27,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:16:27,244 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-26 02:16:27,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:16:27,275 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 02:16:27,275 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:16:27,278 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 02:16:27,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1446601537] [2019-11-26 02:16:27,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:16:27,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2019-11-26 02:16:27,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272328155] [2019-11-26 02:16:27,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-26 02:16:27,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:16:27,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-26 02:16:27,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:16:27,279 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 6 states. [2019-11-26 02:16:27,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:16:27,347 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2019-11-26 02:16:27,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:16:27,348 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-11-26 02:16:27,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:16:27,349 INFO L225 Difference]: With dead ends: 52 [2019-11-26 02:16:27,349 INFO L226 Difference]: Without dead ends: 52 [2019-11-26 02:16:27,349 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 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 02:16:27,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-26 02:16:27,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-11-26 02:16:27,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-26 02:16:27,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2019-11-26 02:16:27,352 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 21 [2019-11-26 02:16:27,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:16:27,352 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2019-11-26 02:16:27,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-26 02:16:27,352 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2019-11-26 02:16:27,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-26 02:16:27,353 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:16:27,353 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 02:16:27,561 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:16:27,561 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:16:27,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:16:27,562 INFO L82 PathProgramCache]: Analyzing trace with hash 208974459, now seen corresponding path program 1 times [2019-11-26 02:16:27,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:16:27,562 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [237121602] [2019-11-26 02:16:27,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/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 02:16:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:16:27,746 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:16:27,747 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:16:27,787 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 02:16:27,787 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:16:27,888 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 02:16:27,888 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [237121602] [2019-11-26 02:16:27,888 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152790351] [2019-11-26 02:16:27,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/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 02:16:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:16:27,976 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-26 02:16:27,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:16:27,985 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 02:16:27,985 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:16:27,987 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:16:27,987 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:16:27,987 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 02:16:28,074 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 02:16:28,074 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:16:28,098 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 02:16:28,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:16:28,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [6, 6] total 15 [2019-11-26 02:16:28,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418881183] [2019-11-26 02:16:28,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 02:16:28,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:16:28,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 02:16:28,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-11-26 02:16:28,100 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 7 states. [2019-11-26 02:16:28,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:16:28,311 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2019-11-26 02:16:28,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:16:28,312 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2019-11-26 02:16:28,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:16:28,312 INFO L225 Difference]: With dead ends: 54 [2019-11-26 02:16:28,312 INFO L226 Difference]: Without dead ends: 54 [2019-11-26 02:16:28,313 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2019-11-26 02:16:28,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-26 02:16:28,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2019-11-26 02:16:28,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-26 02:16:28,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2019-11-26 02:16:28,315 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 21 [2019-11-26 02:16:28,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:16:28,315 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2019-11-26 02:16:28,315 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 02:16:28,315 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2019-11-26 02:16:28,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-26 02:16:28,315 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:16:28,316 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 02:16:28,716 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 02:16:28,716 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:16:28,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:16:28,717 INFO L82 PathProgramCache]: Analyzing trace with hash 208974460, now seen corresponding path program 1 times [2019-11-26 02:16:28,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:16:28,717 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [856451890] [2019-11-26 02:16:28,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/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 02:16:28,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:16:28,884 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:16:28,885 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:16:28,923 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 02:16:28,923 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:16:29,025 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 02:16:29,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [856451890] [2019-11-26 02:16:29,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475089251] [2019-11-26 02:16:29,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/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 02:16:29,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:16:29,113 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-26 02:16:29,114 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:16:29,132 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 02:16:29,132 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:16:29,140 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:16:29,141 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:16:29,141 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-26 02:16:29,240 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 02:16:29,240 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:16:29,725 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 02:16:29,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:16:29,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [6, 6] total 22 [2019-11-26 02:16:29,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925733276] [2019-11-26 02:16:29,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-26 02:16:29,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:16:29,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-26 02:16:29,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2019-11-26 02:16:29,727 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 14 states. [2019-11-26 02:16:30,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:16:30,127 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2019-11-26 02:16:30,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-26 02:16:30,128 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2019-11-26 02:16:30,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:16:30,128 INFO L225 Difference]: With dead ends: 48 [2019-11-26 02:16:30,128 INFO L226 Difference]: Without dead ends: 48 [2019-11-26 02:16:30,129 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 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 02:16:30,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-26 02:16:30,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-11-26 02:16:30,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-26 02:16:30,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2019-11-26 02:16:30,130 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 21 [2019-11-26 02:16:30,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:16:30,130 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2019-11-26 02:16:30,130 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-26 02:16:30,130 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2019-11-26 02:16:30,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-26 02:16:30,131 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:16:30,131 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] [2019-11-26 02:16:30,531 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 02:16:30,532 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:16:30,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:16:30,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1677767041, now seen corresponding path program 1 times [2019-11-26 02:16:30,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:16:30,532 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1681268920] [2019-11-26 02:16:30,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/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 02:16:30,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:16:30,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:16:30,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:16:30,739 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 02:16:30,739 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:16:30,799 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 02:16:30,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1681268920] [2019-11-26 02:16:30,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058585347] [2019-11-26 02:16:30,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/bin/utaipan/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:16:30,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:16:30,898 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-26 02:16:30,900 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:16:30,910 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 02:16:30,910 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:16:30,912 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:16:30,913 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:16:30,913 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 02:16:31,045 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 02:16:31,045 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:16:31,095 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 02:16:31,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:16:31,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [6, 6] total 16 [2019-11-26 02:16:31,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567733274] [2019-11-26 02:16:31,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-26 02:16:31,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:16:31,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-26 02:16:31,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2019-11-26 02:16:31,097 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 8 states. [2019-11-26 02:16:31,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:16:31,377 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2019-11-26 02:16:31,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-26 02:16:31,378 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2019-11-26 02:16:31,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:16:31,378 INFO L225 Difference]: With dead ends: 50 [2019-11-26 02:16:31,378 INFO L226 Difference]: Without dead ends: 50 [2019-11-26 02:16:31,379 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2019-11-26 02:16:31,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-26 02:16:31,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2019-11-26 02:16:31,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-26 02:16:31,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2019-11-26 02:16:31,380 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 27 [2019-11-26 02:16:31,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:16:31,380 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2019-11-26 02:16:31,380 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-26 02:16:31,380 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2019-11-26 02:16:31,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-26 02:16:31,381 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:16:31,381 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] [2019-11-26 02:16:31,781 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 cvc4 --incremental --print-success --lang smt --rewrite-divk,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:16:31,782 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:16:31,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:16:31,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1677767040, now seen corresponding path program 1 times [2019-11-26 02:16:31,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:16:31,782 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [225143986] [2019-11-26 02:16:31,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/bin/utaipan/cvc4 Starting monitored process 26 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:16:31,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:16:31,959 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:16:31,960 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:16:32,004 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 02:16:32,004 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:16:32,070 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 02:16:32,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [225143986] [2019-11-26 02:16:32,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610816975] [2019-11-26 02:16:32,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/bin/utaipan/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:16:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:16:32,162 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-26 02:16:32,163 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:16:32,367 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 37 [2019-11-26 02:16:32,368 INFO L343 Elim1Store]: treesize reduction 285, result has 21.5 percent of original size [2019-11-26 02:16:32,368 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 80 treesize of output 123 [2019-11-26 02:16:32,377 INFO L343 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2019-11-26 02:16:32,377 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 02:16:32,378 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 02:16:32,381 INFO L567 ElimStorePlain]: treesize reduction 13, result has 7.1 percent of original size [2019-11-26 02:16:32,381 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:16:32,382 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:16:32,382 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 02:16:32,382 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:80, output treesize:1 [2019-11-26 02:16:32,383 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 02:16:32,383 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:16:32,750 WARN L192 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 56 [2019-11-26 02:16:32,750 INFO L343 Elim1Store]: treesize reduction 285, result has 28.7 percent of original size [2019-11-26 02:16:32,750 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 79 treesize of output 135 [2019-11-26 02:16:32,773 INFO L343 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2019-11-26 02:16:32,774 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 63 treesize of output 25 [2019-11-26 02:16:32,775 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 02:16:32,781 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:16:32,781 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 02:16:32,789 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:16:32,789 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 02:16:32,789 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:79, output treesize:12 [2019-11-26 02:16:32,846 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 02:16:32,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:16:32,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 8] imperfect sequences [6, 6] total 19 [2019-11-26 02:16:32,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954672220] [2019-11-26 02:16:32,846 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-26 02:16:32,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:16:32,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-26 02:16:32,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2019-11-26 02:16:32,847 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 11 states. [2019-11-26 02:16:32,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:16:32,986 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-11-26 02:16:32,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:16:32,986 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2019-11-26 02:16:32,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:16:32,986 INFO L225 Difference]: With dead ends: 23 [2019-11-26 02:16:32,986 INFO L226 Difference]: Without dead ends: 0 [2019-11-26 02:16:32,986 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2019-11-26 02:16:32,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-26 02:16:32,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-26 02:16:32,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-26 02:16:32,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-26 02:16:32,987 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2019-11-26 02:16:32,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:16:32,987 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-26 02:16:32,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-26 02:16:32,987 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-26 02:16:32,987 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-26 02:16:33,388 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 cvc4 --incremental --print-success --lang smt --rewrite-divk,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:16:33,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:16:33 BoogieIcfgContainer [2019-11-26 02:16:33,392 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:16:33,392 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:16:33,393 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:16:33,393 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:16:33,393 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:16:16" (3/4) ... [2019-11-26 02:16:33,395 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-26 02:16:33,405 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 26 nodes and edges [2019-11-26 02:16:33,406 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2019-11-26 02:16:33,406 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-11-26 02:16:33,407 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-11-26 02:16:33,452 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_392a2dba-7dab-4ef7-8679-71ca5a07c3e1/bin/utaipan/witness.graphml [2019-11-26 02:16:33,452 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:16:33,453 INFO L168 Benchmark]: Toolchain (without parser) took 18631.26 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 338.7 MB). Free memory was 944.7 MB in the beginning and 1.2 GB in the end (delta: -223.9 MB). Peak memory consumption was 114.8 MB. Max. memory is 11.5 GB. [2019-11-26 02:16:33,453 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:16:33,454 INFO L168 Benchmark]: CACSL2BoogieTranslator took 886.67 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 174.1 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -180.9 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:16:33,454 INFO L168 Benchmark]: Boogie Procedure Inliner took 64.77 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.4 MB). Peak memory consumption was 6.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:16:33,454 INFO L168 Benchmark]: Boogie Preprocessor took 71.68 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:16:33,454 INFO L168 Benchmark]: RCFGBuilder took 595.69 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 39.8 MB). Peak memory consumption was 39.8 MB. Max. memory is 11.5 GB. [2019-11-26 02:16:33,455 INFO L168 Benchmark]: TraceAbstraction took 16940.42 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 164.6 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -100.5 MB). Peak memory consumption was 64.2 MB. Max. memory is 11.5 GB. [2019-11-26 02:16:33,455 INFO L168 Benchmark]: Witness Printer took 59.38 ms. Allocated memory is still 1.4 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 11.5 GB. [2019-11-26 02:16:33,457 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 886.67 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 174.1 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -180.9 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 64.77 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.4 MB). Peak memory consumption was 6.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 71.68 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 595.69 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 39.8 MB). Peak memory consumption was 39.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 16940.42 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 164.6 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -100.5 MB). Peak memory consumption was 64.2 MB. Max. memory is 11.5 GB. * Witness Printer took 59.38 ms. Allocated memory is still 1.4 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 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: 699]: 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: 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: 699]: 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: 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: 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: 762]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 702]: 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: 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: 700]: free always succeeds For all program executions holds that free always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 21 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 60 locations, 21 error locations. Result: SAFE, OverallTime: 16.8s, OverallIterations: 18, TraceHistogramMax: 2, AutomataDifference: 3.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1038 SDtfs, 3059 SDslu, 1417 SDs, 0 SdLazy, 1008 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 840 GetRequests, 624 SyntacticMatches, 3 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 5.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=5, 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, 18 MinimizatonAttempts, 483 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 4.7s InterpolantComputationTime, 421 NumberOfCodeBlocks, 421 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 790 ConstructedInterpolants, 1 QuantifiedInterpolants, 62506 SizeOfPredicates, 186 NumberOfNonLiveVariables, 2454 ConjunctsInSsa, 239 ConjunctsInUnsatCore, 52 InterpolantComputations, 36 PerfectInterpolantSequences, 66/114 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...