./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i --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_db2e78f2-f16f-4733-b21c-6508bb58aa3e/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_db2e78f2-f16f-4733-b21c-6508bb58aa3e/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_db2e78f2-f16f-4733-b21c-6508bb58aa3e/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_db2e78f2-f16f-4733-b21c-6508bb58aa3e/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_db2e78f2-f16f-4733-b21c-6508bb58aa3e/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_db2e78f2-f16f-4733-b21c-6508bb58aa3e/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 978f701fee046cd9a3f43bfb12d114d1876d2f10 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 15:51:11,811 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 15:51:11,812 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 15:51:11,834 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 15:51:11,834 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 15:51:11,835 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 15:51:11,842 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 15:51:11,844 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 15:51:11,845 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 15:51:11,846 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 15:51:11,847 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 15:51:11,848 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 15:51:11,848 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 15:51:11,849 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 15:51:11,850 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 15:51:11,851 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 15:51:11,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 15:51:11,852 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 15:51:11,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 15:51:11,855 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 15:51:11,857 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 15:51:11,858 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 15:51:11,859 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 15:51:11,860 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 15:51:11,862 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 15:51:11,862 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 15:51:11,863 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 15:51:11,863 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 15:51:11,864 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 15:51:11,865 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 15:51:11,865 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 15:51:11,866 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 15:51:11,866 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 15:51:11,867 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 15:51:11,867 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 15:51:11,868 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 15:51:11,868 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 15:51:11,868 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 15:51:11,868 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 15:51:11,869 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 15:51:11,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 15:51:11,870 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_db2e78f2-f16f-4733-b21c-6508bb58aa3e/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 15:51:11,887 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 15:51:11,887 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 15:51:11,888 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 15:51:11,888 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 15:51:11,888 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 15:51:11,888 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 15:51:11,888 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 15:51:11,888 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 15:51:11,888 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 15:51:11,889 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 15:51:11,889 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 15:51:11,889 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 15:51:11,889 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 15:51:11,889 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 15:51:11,889 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 15:51:11,890 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 15:51:11,890 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 15:51:11,890 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 15:51:11,890 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 15:51:11,890 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 15:51:11,890 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 15:51:11,890 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 15:51:11,891 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 15:51:11,891 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 15:51:11,891 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 15:51:11,891 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 15:51:11,891 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 15:51:11,891 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 15:51:11,891 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 15:51:11,891 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 15:51:11,892 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 15:51:11,892 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 15:51:11,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 15:51:11,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 15:51:11,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 15:51:11,892 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 15:51:11,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 15:51:11,892 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 15:51:11,892 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 15:51:11,893 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_db2e78f2-f16f-4733-b21c-6508bb58aa3e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_db2e78f2-f16f-4733-b21c-6508bb58aa3e/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 978f701fee046cd9a3f43bfb12d114d1876d2f10 [2020-12-09 15:51:12,074 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 15:51:12,090 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 15:51:12,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 15:51:12,093 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 15:51:12,093 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 15:51:12,094 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_db2e78f2-f16f-4733-b21c-6508bb58aa3e/bin/utaipan/../../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i [2020-12-09 15:51:12,136 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_db2e78f2-f16f-4733-b21c-6508bb58aa3e/bin/utaipan/data/357756d9a/acfe8370ac6e4e4cb1018f4aa9188cad/FLAG7c92c6585 [2020-12-09 15:51:12,556 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 15:51:12,556 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_db2e78f2-f16f-4733-b21c-6508bb58aa3e/sv-benchmarks/c/list-ext-properties/960521-1_1-1.i [2020-12-09 15:51:12,565 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_db2e78f2-f16f-4733-b21c-6508bb58aa3e/bin/utaipan/data/357756d9a/acfe8370ac6e4e4cb1018f4aa9188cad/FLAG7c92c6585 [2020-12-09 15:51:12,574 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_db2e78f2-f16f-4733-b21c-6508bb58aa3e/bin/utaipan/data/357756d9a/acfe8370ac6e4e4cb1018f4aa9188cad [2020-12-09 15:51:12,576 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 15:51:12,577 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 15:51:12,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 15:51:12,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 15:51:12,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 15:51:12,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 03:51:12" (1/1) ... [2020-12-09 15:51:12,582 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b6db739 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:51:12, skipping insertion in model container [2020-12-09 15:51:12,583 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 03:51:12" (1/1) ... [2020-12-09 15:51:12,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 15:51:12,614 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 15:51:12,798 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 15:51:12,804 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 15:51:12,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 15:51:12,869 INFO L208 MainTranslator]: Completed translation [2020-12-09 15:51:12,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:51:12 WrapperNode [2020-12-09 15:51:12,869 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 15:51:12,870 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 15:51:12,870 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 15:51:12,870 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 15:51:12,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:51:12" (1/1) ... [2020-12-09 15:51:12,885 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:51:12" (1/1) ... [2020-12-09 15:51:12,905 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 15:51:12,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 15:51:12,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 15:51:12,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 15:51:12,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:51:12" (1/1) ... [2020-12-09 15:51:12,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:51:12" (1/1) ... [2020-12-09 15:51:12,914 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:51:12" (1/1) ... [2020-12-09 15:51:12,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:51:12" (1/1) ... [2020-12-09 15:51:12,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:51:12" (1/1) ... [2020-12-09 15:51:12,922 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:51:12" (1/1) ... [2020-12-09 15:51:12,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:51:12" (1/1) ... [2020-12-09 15:51:12,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 15:51:12,926 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 15:51:12,926 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 15:51:12,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 15:51:12,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:51:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_db2e78f2-f16f-4733-b21c-6508bb58aa3e/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 15:51:12,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 15:51:12,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 15:51:12,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 15:51:12,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 15:51:12,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 15:51:12,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 15:51:12,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 15:51:12,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 15:51:13,303 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 15:51:13,303 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-09 15:51:13,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 03:51:13 BoogieIcfgContainer [2020-12-09 15:51:13,305 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 15:51:13,307 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 15:51:13,307 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 15:51:13,310 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 15:51:13,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 03:51:12" (1/3) ... [2020-12-09 15:51:13,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ff355a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 03:51:13, skipping insertion in model container [2020-12-09 15:51:13,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:51:12" (2/3) ... [2020-12-09 15:51:13,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ff355a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 03:51:13, skipping insertion in model container [2020-12-09 15:51:13,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 03:51:13" (3/3) ... [2020-12-09 15:51:13,313 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1_1-1.i [2020-12-09 15:51:13,322 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 15:51:13,325 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2020-12-09 15:51:13,332 INFO L253 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2020-12-09 15:51:13,348 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 15:51:13,348 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 15:51:13,348 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 15:51:13,348 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 15:51:13,348 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 15:51:13,348 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 15:51:13,349 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 15:51:13,349 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 15:51:13,359 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-12-09 15:51:13,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 15:51:13,363 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:51:13,364 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 15:51:13,364 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 15:51:13,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:51:13,368 INFO L82 PathProgramCache]: Analyzing trace with hash 3678261, now seen corresponding path program 1 times [2020-12-09 15:51:13,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:51:13,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640730662] [2020-12-09 15:51:13,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:51:13,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:51:13,464 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 15:51:13,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640730662] [2020-12-09 15:51:13,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:51:13,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 15:51:13,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261742681] [2020-12-09 15:51:13,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 15:51:13,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:51:13,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 15:51:13,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 15:51:13,480 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states. [2020-12-09 15:51:13,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:51:13,489 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-12-09 15:51:13,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 15:51:13,490 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2020-12-09 15:51:13,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:51:13,495 INFO L225 Difference]: With dead ends: 47 [2020-12-09 15:51:13,495 INFO L226 Difference]: Without dead ends: 46 [2020-12-09 15:51:13,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 15:51:13,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-09 15:51:13,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-09 15:51:13,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-09 15:51:13,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-12-09 15:51:13,520 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 4 [2020-12-09 15:51:13,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:51:13,520 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-12-09 15:51:13,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 15:51:13,520 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-12-09 15:51:13,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 15:51:13,521 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:51:13,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 15:51:13,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 15:51:13,521 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 15:51:13,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:51:13,522 INFO L82 PathProgramCache]: Analyzing trace with hash 113811744, now seen corresponding path program 1 times [2020-12-09 15:51:13,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:51:13,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333897593] [2020-12-09 15:51:13,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:51:13,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:51:13,565 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 15:51:13,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333897593] [2020-12-09 15:51:13,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:51:13,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 15:51:13,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362733211] [2020-12-09 15:51:13,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 15:51:13,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:51:13,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 15:51:13,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 15:51:13,568 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 3 states. [2020-12-09 15:51:13,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:51:13,599 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2020-12-09 15:51:13,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 15:51:13,600 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 15:51:13,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:51:13,601 INFO L225 Difference]: With dead ends: 45 [2020-12-09 15:51:13,601 INFO L226 Difference]: Without dead ends: 45 [2020-12-09 15:51:13,601 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 15:51:13,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-09 15:51:13,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-09 15:51:13,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-09 15:51:13,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-12-09 15:51:13,606 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 5 [2020-12-09 15:51:13,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:51:13,606 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-12-09 15:51:13,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 15:51:13,606 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-12-09 15:51:13,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 15:51:13,606 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:51:13,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 15:51:13,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 15:51:13,613 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 15:51:13,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:51:13,614 INFO L82 PathProgramCache]: Analyzing trace with hash 113811745, now seen corresponding path program 1 times [2020-12-09 15:51:13,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:51:13,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25200340] [2020-12-09 15:51:13,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:51:13,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:51:13,656 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 15:51:13,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25200340] [2020-12-09 15:51:13,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:51:13,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 15:51:13,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726041965] [2020-12-09 15:51:13,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 15:51:13,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:51:13,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 15:51:13,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 15:51:13,658 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 4 states. [2020-12-09 15:51:13,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:51:13,704 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2020-12-09 15:51:13,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 15:51:13,705 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-12-09 15:51:13,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:51:13,705 INFO L225 Difference]: With dead ends: 88 [2020-12-09 15:51:13,706 INFO L226 Difference]: Without dead ends: 88 [2020-12-09 15:51:13,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 15:51:13,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-09 15:51:13,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 49. [2020-12-09 15:51:13,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-09 15:51:13,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-12-09 15:51:13,711 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 5 [2020-12-09 15:51:13,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:51:13,711 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-12-09 15:51:13,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 15:51:13,711 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-12-09 15:51:13,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 15:51:13,712 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:51:13,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:51:13,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 15:51:13,712 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 15:51:13,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:51:13,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1998977518, now seen corresponding path program 1 times [2020-12-09 15:51:13,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:51:13,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202955676] [2020-12-09 15:51:13,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:51:13,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:51:13,755 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 15:51:13,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202955676] [2020-12-09 15:51:13,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:51:13,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 15:51:13,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824863194] [2020-12-09 15:51:13,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 15:51:13,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:51:13,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 15:51:13,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 15:51:13,758 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 4 states. [2020-12-09 15:51:13,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:51:13,791 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-12-09 15:51:13,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 15:51:13,792 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 15:51:13,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:51:13,793 INFO L225 Difference]: With dead ends: 46 [2020-12-09 15:51:13,793 INFO L226 Difference]: Without dead ends: 46 [2020-12-09 15:51:13,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 15:51:13,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-09 15:51:13,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-09 15:51:13,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-09 15:51:13,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-12-09 15:51:13,798 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 7 [2020-12-09 15:51:13,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:51:13,798 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-12-09 15:51:13,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 15:51:13,798 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-12-09 15:51:13,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 15:51:13,799 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:51:13,799 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:51:13,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 15:51:13,799 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 15:51:13,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:51:13,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1998977519, now seen corresponding path program 1 times [2020-12-09 15:51:13,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:51:13,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132665581] [2020-12-09 15:51:13,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:51:13,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:51:13,875 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 15:51:13,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132665581] [2020-12-09 15:51:13,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:51:13,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 15:51:13,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522013468] [2020-12-09 15:51:13,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 15:51:13,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:51:13,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 15:51:13,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 15:51:13,877 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 6 states. [2020-12-09 15:51:13,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:51:13,954 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2020-12-09 15:51:13,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 15:51:13,954 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-12-09 15:51:13,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:51:13,955 INFO L225 Difference]: With dead ends: 79 [2020-12-09 15:51:13,955 INFO L226 Difference]: Without dead ends: 79 [2020-12-09 15:51:13,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 15:51:13,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-09 15:51:13,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 55. [2020-12-09 15:51:13,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-09 15:51:13,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2020-12-09 15:51:13,962 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 7 [2020-12-09 15:51:13,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:51:13,962 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2020-12-09 15:51:13,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 15:51:13,962 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2020-12-09 15:51:13,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 15:51:13,962 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:51:13,963 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2020-12-09 15:51:13,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 15:51:13,963 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 15:51:13,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:51:13,964 INFO L82 PathProgramCache]: Analyzing trace with hash 2000475334, now seen corresponding path program 1 times [2020-12-09 15:51:13,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:51:13,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503538288] [2020-12-09 15:51:13,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:51:13,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:51:14,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:51:14,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503538288] [2020-12-09 15:51:14,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74105750] [2020-12-09 15:51:14,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_db2e78f2-f16f-4733-b21c-6508bb58aa3e/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 15:51:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:51:14,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 15:51:14,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:51:14,123 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-09 15:51:14,123 INFO L382 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 1 case distinctions, treesize of input 13 treesize of output 15 [2020-12-09 15:51:14,125 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 15:51:14,132 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 15:51:14,141 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 15:51:14,142 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:34 [2020-12-09 15:51:14,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:51:14,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 15:51:14,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:51:14,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 15:51:14,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 7 [2020-12-09 15:51:14,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492333121] [2020-12-09 15:51:14,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 15:51:14,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:51:14,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 15:51:14,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-09 15:51:14,213 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 7 states. [2020-12-09 15:51:14,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:51:14,299 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2020-12-09 15:51:14,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 15:51:14,300 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2020-12-09 15:51:14,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:51:14,301 INFO L225 Difference]: With dead ends: 78 [2020-12-09 15:51:14,301 INFO L226 Difference]: Without dead ends: 78 [2020-12-09 15:51:14,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-12-09 15:51:14,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-09 15:51:14,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2020-12-09 15:51:14,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-09 15:51:14,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2020-12-09 15:51:14,306 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 7 [2020-12-09 15:51:14,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:51:14,307 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2020-12-09 15:51:14,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 15:51:14,307 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2020-12-09 15:51:14,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 15:51:14,307 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:51:14,307 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:51:14,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-09 15:51:14,509 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 15:51:14,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:51:14,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1167076850, now seen corresponding path program 1 times [2020-12-09 15:51:14,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:51:14,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127339963] [2020-12-09 15:51:14,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:51:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:51:14,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:51:14,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127339963] [2020-12-09 15:51:14,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976592638] [2020-12-09 15:51:14,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_db2e78f2-f16f-4733-b21c-6508bb58aa3e/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 15:51:14,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:51:14,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 15:51:14,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:51:14,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:51:14,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 15:51:14,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:51:14,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 15:51:14,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 9 [2020-12-09 15:51:14,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727211318] [2020-12-09 15:51:14,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 15:51:14,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:51:14,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 15:51:14,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-09 15:51:14,789 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand 7 states. [2020-12-09 15:51:14,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:51:14,829 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2020-12-09 15:51:14,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 15:51:14,830 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2020-12-09 15:51:14,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:51:14,830 INFO L225 Difference]: With dead ends: 76 [2020-12-09 15:51:14,830 INFO L226 Difference]: Without dead ends: 76 [2020-12-09 15:51:14,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-09 15:51:14,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-09 15:51:14,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 53. [2020-12-09 15:51:14,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-09 15:51:14,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2020-12-09 15:51:14,834 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 9 [2020-12-09 15:51:14,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:51:14,834 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2020-12-09 15:51:14,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 15:51:14,834 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2020-12-09 15:51:14,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 15:51:14,834 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:51:14,834 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:51:15,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 15:51:15,037 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 15:51:15,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:51:15,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1688479660, now seen corresponding path program 1 times [2020-12-09 15:51:15,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:51:15,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551173462] [2020-12-09 15:51:15,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:51:15,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:51:15,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:51:15,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551173462] [2020-12-09 15:51:15,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921920381] [2020-12-09 15:51:15,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_db2e78f2-f16f-4733-b21c-6508bb58aa3e/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 15:51:15,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:51:15,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-09 15:51:15,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:51:15,288 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-09 15:51:15,288 INFO L382 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 1 case distinctions, treesize of input 13 treesize of output 15 [2020-12-09 15:51:15,289 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 15:51:15,295 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 15:51:15,298 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 15:51:15,298 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:34 [2020-12-09 15:51:15,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:51:15,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 15:51:15,371 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 15:51:15,372 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 15:51:15,372 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 15:51:15,373 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:5 [2020-12-09 15:51:15,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:51:15,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 15:51:15,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5] total 11 [2020-12-09 15:51:15,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651042437] [2020-12-09 15:51:15,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 15:51:15,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:51:15,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 15:51:15,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-12-09 15:51:15,391 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 9 states. [2020-12-09 15:51:15,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:51:15,582 INFO L93 Difference]: Finished difference Result 113 states and 119 transitions. [2020-12-09 15:51:15,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 15:51:15,583 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-12-09 15:51:15,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:51:15,583 INFO L225 Difference]: With dead ends: 113 [2020-12-09 15:51:15,583 INFO L226 Difference]: Without dead ends: 113 [2020-12-09 15:51:15,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-12-09 15:51:15,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-09 15:51:15,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 52. [2020-12-09 15:51:15,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-09 15:51:15,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2020-12-09 15:51:15,587 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 9 [2020-12-09 15:51:15,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:51:15,587 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2020-12-09 15:51:15,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 15:51:15,587 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2020-12-09 15:51:15,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 15:51:15,588 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:51:15,588 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:51:15,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 15:51:15,789 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 15:51:15,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:51:15,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1819714314, now seen corresponding path program 1 times [2020-12-09 15:51:15,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:51:15,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648334274] [2020-12-09 15:51:15,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:51:15,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:51:15,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 15:51:15,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648334274] [2020-12-09 15:51:15,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:51:15,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 15:51:15,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109040153] [2020-12-09 15:51:15,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 15:51:15,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:51:15,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 15:51:15,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 15:51:15,821 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 4 states. [2020-12-09 15:51:15,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:51:15,870 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2020-12-09 15:51:15,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 15:51:15,870 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-09 15:51:15,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:51:15,871 INFO L225 Difference]: With dead ends: 50 [2020-12-09 15:51:15,871 INFO L226 Difference]: Without dead ends: 50 [2020-12-09 15:51:15,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 15:51:15,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-09 15:51:15,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-09 15:51:15,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-09 15:51:15,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2020-12-09 15:51:15,876 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 10 [2020-12-09 15:51:15,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:51:15,877 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2020-12-09 15:51:15,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 15:51:15,877 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2020-12-09 15:51:15,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 15:51:15,877 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:51:15,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:51:15,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-09 15:51:15,878 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 15:51:15,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:51:15,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1819714315, now seen corresponding path program 1 times [2020-12-09 15:51:15,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:51:15,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671325160] [2020-12-09 15:51:15,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:51:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 15:51:15,895 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 15:51:15,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 15:51:15,904 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 15:51:15,916 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 15:51:15,917 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 15:51:15,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-09 15:51:15,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 03:51:15 BoogieIcfgContainer [2020-12-09 15:51:15,936 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 15:51:15,936 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 15:51:15,936 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 15:51:15,936 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 15:51:15,936 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 03:51:13" (3/4) ... [2020-12-09 15:51:15,938 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 15:51:15,965 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_db2e78f2-f16f-4733-b21c-6508bb58aa3e/bin/utaipan/witness.graphml [2020-12-09 15:51:15,965 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 15:51:15,966 INFO L168 Benchmark]: Toolchain (without parser) took 3388.68 ms. Allocated memory was 138.4 MB in the beginning and 172.0 MB in the end (delta: 33.6 MB). Free memory was 95.8 MB in the beginning and 138.6 MB in the end (delta: -42.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 15:51:15,966 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 138.4 MB. Free memory is still 113.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 15:51:15,966 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.19 ms. Allocated memory is still 138.4 MB. Free memory was 95.6 MB in the beginning and 74.5 MB in the end (delta: 21.1 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-12-09 15:51:15,967 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.62 ms. Allocated memory is still 138.4 MB. Free memory was 74.5 MB in the beginning and 115.4 MB in the end (delta: -40.9 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. [2020-12-09 15:51:15,967 INFO L168 Benchmark]: Boogie Preprocessor took 19.12 ms. Allocated memory is still 138.4 MB. Free memory was 115.4 MB in the beginning and 114.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 15:51:15,967 INFO L168 Benchmark]: RCFGBuilder took 380.03 ms. Allocated memory is still 138.4 MB. Free memory was 114.3 MB in the beginning and 93.3 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-12-09 15:51:15,968 INFO L168 Benchmark]: TraceAbstraction took 2628.57 ms. Allocated memory was 138.4 MB in the beginning and 172.0 MB in the end (delta: 33.6 MB). Free memory was 92.8 MB in the beginning and 140.7 MB in the end (delta: -48.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 15:51:15,968 INFO L168 Benchmark]: Witness Printer took 29.27 ms. Allocated memory is still 172.0 MB. Free memory was 140.7 MB in the beginning and 138.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 15:51:15,970 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 138.4 MB. Free memory is still 113.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 291.19 ms. Allocated memory is still 138.4 MB. Free memory was 95.6 MB in the beginning and 74.5 MB in the end (delta: 21.1 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.62 ms. Allocated memory is still 138.4 MB. Free memory was 74.5 MB in the beginning and 115.4 MB in the end (delta: -40.9 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.12 ms. Allocated memory is still 138.4 MB. Free memory was 115.4 MB in the beginning and 114.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 380.03 ms. Allocated memory is still 138.4 MB. Free memory was 114.3 MB in the beginning and 93.3 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2628.57 ms. Allocated memory was 138.4 MB in the beginning and 172.0 MB in the end (delta: 33.6 MB). Free memory was 92.8 MB in the beginning and 140.7 MB in the end (delta: -48.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 29.27 ms. Allocated memory is still 172.0 MB. Free memory was 140.7 MB in the beginning and 138.6 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: 544]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L523] int *a, *b; [L524] int n; [L536] n = 1 VAL [a={0:0}, b={0:0}, n=1] [L537] COND FALSE !(__VERIFIER_nondet_int() && n < 30) [L540] a = malloc(n * sizeof(*a)) [L541] b = malloc(n * sizeof(*b)) [L542] EXPR b++ VAL [a={-2:0}, b={-1:4}, n=1] [L542] *b++ = 0 [L528] int i; [L529] i = 0 VAL [a={-2:0}, b={-1:4}, n=1] [L529] COND TRUE i < n VAL [a={-2:0}, b={-1:4}, n=1] [L530] a[i] = n [L529] i++ VAL [a={-2:0}, b={-1:4}, n=1] [L529] COND FALSE !(i < n) [L531] i = 0 VAL [a={-2:0}, b={-1:4}, n=1] [L531] COND FALSE !(i < n - 1) VAL [a={-2:0}, b={-1:4}, n=1] [L544] b[-2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 47 locations, 21 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.5s, OverallIterations: 10, TraceHistogramMax: 2, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 362 SDtfs, 642 SDslu, 539 SDs, 0 SdLazy, 461 SolverSat, 48 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 81 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred 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: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 171 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 98 NumberOfCodeBlocks, 98 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 98 ConstructedInterpolants, 0 QuantifiedInterpolants, 3802 SizeOfPredicates, 13 NumberOfNonLiveVariables, 234 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 15 InterpolantComputations, 12 PerfectInterpolantSequences, 14/19 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: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...