./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/derefInLoop1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_67a3402e-fd20-49ed-b35e-47fe3fe3d682/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_67a3402e-fd20-49ed-b35e-47fe3fe3d682/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_67a3402e-fd20-49ed-b35e-47fe3fe3d682/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_67a3402e-fd20-49ed-b35e-47fe3fe3d682/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/derefInLoop1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_67a3402e-fd20-49ed-b35e-47fe3fe3d682/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_67a3402e-fd20-49ed-b35e-47fe3fe3d682/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 aa3ae4378a5284e50be7191d52900376e96b0fdc ............................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 05:43:44,743 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 05:43:44,745 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 05:43:44,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 05:43:44,774 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 05:43:44,775 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 05:43:44,777 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 05:43:44,779 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 05:43:44,781 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 05:43:44,782 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 05:43:44,783 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 05:43:44,785 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 05:43:44,785 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 05:43:44,786 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 05:43:44,788 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 05:43:44,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 05:43:44,790 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 05:43:44,791 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 05:43:44,793 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 05:43:44,795 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 05:43:44,797 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 05:43:44,798 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 05:43:44,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 05:43:44,800 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 05:43:44,803 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 05:43:44,804 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 05:43:44,804 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 05:43:44,805 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 05:43:44,806 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 05:43:44,807 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 05:43:44,807 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 05:43:44,808 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 05:43:44,809 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 05:43:44,809 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 05:43:44,810 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 05:43:44,811 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 05:43:44,811 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 05:43:44,811 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 05:43:44,811 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 05:43:44,812 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 05:43:44,813 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 05:43:44,814 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_67a3402e-fd20-49ed-b35e-47fe3fe3d682/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 05:43:44,836 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 05:43:44,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 05:43:44,837 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 05:43:44,837 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 05:43:44,837 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 05:43:44,837 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 05:43:44,837 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 05:43:44,838 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 05:43:44,838 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 05:43:44,838 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 05:43:44,838 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 05:43:44,838 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 05:43:44,838 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 05:43:44,839 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 05:43:44,839 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 05:43:44,839 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 05:43:44,839 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 05:43:44,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 05:43:44,840 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 05:43:44,840 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 05:43:44,840 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 05:43:44,840 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 05:43:44,841 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 05:43:44,841 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 05:43:44,841 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 05:43:44,841 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 05:43:44,841 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 05:43:44,841 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 05:43:44,842 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 05:43:44,842 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 05:43:44,842 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 05:43:44,842 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 05:43:44,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 05:43:44,842 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 05:43:44,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 05:43:44,843 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 05:43:44,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 05:43:44,843 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 05:43:44,843 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 05:43:44,843 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_67a3402e-fd20-49ed-b35e-47fe3fe3d682/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_67a3402e-fd20-49ed-b35e-47fe3fe3d682/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa3ae4378a5284e50be7191d52900376e96b0fdc [2020-12-09 05:43:45,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 05:43:45,039 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 05:43:45,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 05:43:45,041 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 05:43:45,042 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 05:43:45,042 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_67a3402e-fd20-49ed-b35e-47fe3fe3d682/bin/utaipan/../../sv-benchmarks/c/memsafety-ext3/derefInLoop1.c [2020-12-09 05:43:45,091 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_67a3402e-fd20-49ed-b35e-47fe3fe3d682/bin/utaipan/data/5008c8c35/13bb7d608c1040f795baf8297ba50675/FLAG543beff6b [2020-12-09 05:43:45,463 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 05:43:45,463 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_67a3402e-fd20-49ed-b35e-47fe3fe3d682/sv-benchmarks/c/memsafety-ext3/derefInLoop1.c [2020-12-09 05:43:45,468 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_67a3402e-fd20-49ed-b35e-47fe3fe3d682/bin/utaipan/data/5008c8c35/13bb7d608c1040f795baf8297ba50675/FLAG543beff6b [2020-12-09 05:43:45,477 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_67a3402e-fd20-49ed-b35e-47fe3fe3d682/bin/utaipan/data/5008c8c35/13bb7d608c1040f795baf8297ba50675 [2020-12-09 05:43:45,479 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 05:43:45,480 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 05:43:45,481 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 05:43:45,481 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 05:43:45,483 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 05:43:45,484 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:43:45" (1/1) ... [2020-12-09 05:43:45,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12e2f92a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:43:45, skipping insertion in model container [2020-12-09 05:43:45,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:43:45" (1/1) ... [2020-12-09 05:43:45,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 05:43:45,498 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 05:43:45,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 05:43:45,594 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 05:43:45,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 05:43:45,614 INFO L208 MainTranslator]: Completed translation [2020-12-09 05:43:45,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:43:45 WrapperNode [2020-12-09 05:43:45,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 05:43:45,615 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 05:43:45,615 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 05:43:45,615 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 05:43:45,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:43:45" (1/1) ... [2020-12-09 05:43:45,625 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:43:45" (1/1) ... [2020-12-09 05:43:45,636 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 05:43:45,637 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 05:43:45,637 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 05:43:45,637 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 05:43:45,642 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:43:45" (1/1) ... [2020-12-09 05:43:45,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:43:45" (1/1) ... [2020-12-09 05:43:45,643 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:43:45" (1/1) ... [2020-12-09 05:43:45,644 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:43:45" (1/1) ... [2020-12-09 05:43:45,646 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:43:45" (1/1) ... [2020-12-09 05:43:45,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:43:45" (1/1) ... [2020-12-09 05:43:45,650 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:43:45" (1/1) ... [2020-12-09 05:43:45,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 05:43:45,651 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 05:43:45,651 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 05:43:45,651 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 05:43:45,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:43:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_67a3402e-fd20-49ed-b35e-47fe3fe3d682/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 [2020-12-09 05:43:45,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 05:43:45,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 05:43:45,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 05:43:45,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 05:43:45,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 05:43:45,867 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 05:43:45,867 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2020-12-09 05:43:45,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:43:45 BoogieIcfgContainer [2020-12-09 05:43:45,869 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 05:43:45,870 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 05:43:45,870 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 05:43:45,872 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 05:43:45,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:43:45" (1/3) ... [2020-12-09 05:43:45,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@460596a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:43:45, skipping insertion in model container [2020-12-09 05:43:45,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:43:45" (2/3) ... [2020-12-09 05:43:45,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@460596a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:43:45, skipping insertion in model container [2020-12-09 05:43:45,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:43:45" (3/3) ... [2020-12-09 05:43:45,875 INFO L111 eAbstractionObserver]: Analyzing ICFG derefInLoop1.c [2020-12-09 05:43:45,892 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 05:43:45,894 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-09 05:43:45,901 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-09 05:43:45,915 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 05:43:45,915 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 05:43:45,915 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 05:43:45,915 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 05:43:45,915 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 05:43:45,916 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 05:43:45,916 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 05:43:45,916 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 05:43:45,924 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2020-12-09 05:43:45,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 05:43:45,928 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:43:45,928 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 05:43:45,928 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 05:43:45,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:43:45,932 INFO L82 PathProgramCache]: Analyzing trace with hash 58678, now seen corresponding path program 1 times [2020-12-09 05:43:45,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:43:45,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533722118] [2020-12-09 05:43:45,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:43:45,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:43:46,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:43:46,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533722118] [2020-12-09 05:43:46,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:43:46,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 05:43:46,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425208970] [2020-12-09 05:43:46,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 05:43:46,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:43:46,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 05:43:46,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:43:46,041 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2020-12-09 05:43:46,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:43:46,063 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2020-12-09 05:43:46,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:43:46,065 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 05:43:46,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:43:46,070 INFO L225 Difference]: With dead ends: 16 [2020-12-09 05:43:46,070 INFO L226 Difference]: Without dead ends: 15 [2020-12-09 05:43:46,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:43:46,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-09 05:43:46,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 10. [2020-12-09 05:43:46,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-09 05:43:46,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-12-09 05:43:46,091 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 3 [2020-12-09 05:43:46,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:43:46,092 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-12-09 05:43:46,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 05:43:46,092 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-12-09 05:43:46,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 05:43:46,092 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:43:46,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 05:43:46,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 05:43:46,092 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 05:43:46,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:43:46,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1797552, now seen corresponding path program 1 times [2020-12-09 05:43:46,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:43:46,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438830147] [2020-12-09 05:43:46,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:43:46,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:43:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:43:46,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438830147] [2020-12-09 05:43:46,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:43:46,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 05:43:46,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848699543] [2020-12-09 05:43:46,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 05:43:46,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:43:46,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 05:43:46,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:43:46,115 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 3 states. [2020-12-09 05:43:46,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:43:46,127 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2020-12-09 05:43:46,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:43:46,127 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 05:43:46,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:43:46,128 INFO L225 Difference]: With dead ends: 12 [2020-12-09 05:43:46,128 INFO L226 Difference]: Without dead ends: 12 [2020-12-09 05:43:46,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:43:46,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-09 05:43:46,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2020-12-09 05:43:46,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-09 05:43:46,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-12-09 05:43:46,130 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 4 [2020-12-09 05:43:46,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:43:46,131 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-12-09 05:43:46,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 05:43:46,131 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-12-09 05:43:46,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 05:43:46,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:43:46,131 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 05:43:46,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 05:43:46,131 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 05:43:46,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:43:46,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1727391791, now seen corresponding path program 1 times [2020-12-09 05:43:46,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:43:46,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531524742] [2020-12-09 05:43:46,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:43:46,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:43:46,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:43:46,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531524742] [2020-12-09 05:43:46,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002737130] [2020-12-09 05:43:46,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_67a3402e-fd20-49ed-b35e-47fe3fe3d682/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:43:46,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:43:46,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 05:43:46,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:43:46,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:43:46,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:43:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:43:46,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [931160288] [2020-12-09 05:43:46,274 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-12-09 05:43:46,274 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 05:43:46,277 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 05:43:46,281 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 05:43:46,281 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 05:43:46,549 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:43:46,563 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:43:46,591 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 05:43:46,703 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-12-09 05:43:46,820 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-12-09 05:43:46,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 05:43:46,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 6 [2020-12-09 05:43:46,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259292283] [2020-12-09 05:43:46,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 05:43:46,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:43:46,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 05:43:46,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 05:43:46,859 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 5 states. [2020-12-09 05:43:46,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:43:46,902 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2020-12-09 05:43:46,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 05:43:46,903 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-12-09 05:43:46,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:43:46,903 INFO L225 Difference]: With dead ends: 18 [2020-12-09 05:43:46,903 INFO L226 Difference]: Without dead ends: 18 [2020-12-09 05:43:46,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 05:43:46,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-09 05:43:46,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2020-12-09 05:43:46,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-09 05:43:46,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-09 05:43:46,907 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 6 [2020-12-09 05:43:46,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:43:46,907 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-09 05:43:46,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 05:43:46,907 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-09 05:43:46,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 05:43:46,907 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:43:46,908 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2020-12-09 05:43:47,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-09 05:43:47,110 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 05:43:47,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:43:47,112 INFO L82 PathProgramCache]: Analyzing trace with hash 2009516503, now seen corresponding path program 1 times [2020-12-09 05:43:47,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:43:47,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348156182] [2020-12-09 05:43:47,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:43:47,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 05:43:47,149 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 05:43:47,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 05:43:47,178 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 05:43:47,210 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 05:43:47,211 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 05:43:47,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-09 05:43:47,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:43:47 BoogieIcfgContainer [2020-12-09 05:43:47,248 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 05:43:47,249 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 05:43:47,249 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 05:43:47,249 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 05:43:47,250 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:43:45" (3/4) ... [2020-12-09 05:43:47,252 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 05:43:47,280 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_67a3402e-fd20-49ed-b35e-47fe3fe3d682/bin/utaipan/witness.graphml [2020-12-09 05:43:47,280 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 05:43:47,280 INFO L168 Benchmark]: Toolchain (without parser) took 1800.26 ms. Allocated memory was 127.9 MB in the beginning and 157.3 MB in the end (delta: 29.4 MB). Free memory was 97.4 MB in the beginning and 88.8 MB in the end (delta: 8.6 MB). Peak memory consumption was 39.8 MB. Max. memory is 16.1 GB. [2020-12-09 05:43:47,281 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 127.9 MB. Free memory is still 104.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 05:43:47,281 INFO L168 Benchmark]: CACSL2BoogieTranslator took 133.47 ms. Allocated memory is still 127.9 MB. Free memory was 97.3 MB in the beginning and 88.3 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 05:43:47,281 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.28 ms. Allocated memory is still 127.9 MB. Free memory was 88.3 MB in the beginning and 87.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 05:43:47,282 INFO L168 Benchmark]: Boogie Preprocessor took 13.97 ms. Allocated memory is still 127.9 MB. Free memory was 87.0 MB in the beginning and 86.0 MB in the end (delta: 986.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 05:43:47,282 INFO L168 Benchmark]: RCFGBuilder took 217.63 ms. Allocated memory is still 127.9 MB. Free memory was 86.0 MB in the beginning and 73.9 MB in the end (delta: 12.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-09 05:43:47,283 INFO L168 Benchmark]: TraceAbstraction took 1378.26 ms. Allocated memory was 127.9 MB in the beginning and 157.3 MB in the end (delta: 29.4 MB). Free memory was 73.5 MB in the beginning and 90.9 MB in the end (delta: -17.4 MB). Peak memory consumption was 14.6 MB. Max. memory is 16.1 GB. [2020-12-09 05:43:47,283 INFO L168 Benchmark]: Witness Printer took 31.05 ms. Allocated memory is still 157.3 MB. Free memory was 90.9 MB in the beginning and 88.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 05:43:47,285 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 127.9 MB. Free memory is still 104.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 133.47 ms. Allocated memory is still 127.9 MB. Free memory was 97.3 MB in the beginning and 88.3 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 21.28 ms. Allocated memory is still 127.9 MB. Free memory was 88.3 MB in the beginning and 87.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 13.97 ms. Allocated memory is still 127.9 MB. Free memory was 87.0 MB in the beginning and 86.0 MB in the end (delta: 986.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 217.63 ms. Allocated memory is still 127.9 MB. Free memory was 86.0 MB in the beginning and 73.9 MB in the end (delta: 12.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1378.26 ms. Allocated memory was 127.9 MB in the beginning and 157.3 MB in the end (delta: 29.4 MB). Free memory was 73.5 MB in the beginning and 90.9 MB in the end (delta: -17.4 MB). Peak memory consumption was 14.6 MB. Max. memory is 16.1 GB. * Witness Printer took 31.05 ms. Allocated memory is still 157.3 MB. Free memory was 90.9 MB in the beginning and 88.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L2] int* p; [L3] int i = 0; [L3] COND TRUE i < 2 [L4] int a[10]; [L5] COND TRUE i == 0 [L6] p = a [L3] i++ [L3] COND TRUE i < 2 [L4] int a[10]; [L5] COND FALSE !(i == 0) [L8] p[0] = 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 17 SDtfs, 11 SDslu, 9 SDs, 0 SdLazy, 46 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 10 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 224 SizeOfPredicates, 0 NumberOfNonLiveVariables, 33 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 0/3 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME[ms]: 318, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 5, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 9, TOOLS_POST_TIME[ms]: 199, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 9, TOOLS_QUANTIFIERELIM_TIME[ms]: 195, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 65, FLUID_QUERY_TIME[ms]: 2, FLUID_QUERIES: 17, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME[ms]: 82, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME[ms]: 0, DOMAIN_ISSUBSETEQ_APPLICATIONS: 1, DOMAIN_ISSUBSETEQ_TIME[ms]: 0, DOMAIN_ISBOTTOM_APPLICATIONS: 5, DOMAIN_ISBOTTOM_TIME[ms]: 6, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 69, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 68, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 1, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 1, PATH_EXPR_TIME[ms]: 2, REGEX_TO_DAG_TIME[ms]: 2, DAG_COMPRESSION_TIME[ms]: 6, DAG_COMPRESSION_PROCESSED_NODES: 54, DAG_COMPRESSION_RETAINED_NODES: 22, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...