./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree2.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_worker_vcloud-master_on_vcloud-master/run_dir_b699649b-1b66-4d93-bdcb-6a4ddac9e3ef/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b699649b-1b66-4d93-bdcb-6a4ddac9e3ef/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b699649b-1b66-4d93-bdcb-6a4ddac9e3ef/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b699649b-1b66-4d93-bdcb-6a4ddac9e3ef/bin/utaipan-WLngWcDbfI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b699649b-1b66-4d93-bdcb-6a4ddac9e3ef/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b699649b-1b66-4d93-bdcb-6a4ddac9e3ef/bin/utaipan-WLngWcDbfI --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 44834c55142a76240cb3980fc2bb6f5aeaa27c83 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 [2021-10-11 02:30:51,798 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:30:51,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:30:51,857 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:30:51,858 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:30:51,864 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:30:51,868 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:30:51,873 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:30:51,876 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:30:51,883 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:30:51,884 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:30:51,886 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:30:51,887 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:30:51,890 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:30:51,892 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:30:51,894 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:30:51,896 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:30:51,900 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:30:51,903 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:30:51,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:30:51,916 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:30:51,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:30:51,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:30:51,924 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:30:51,934 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:30:51,935 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:30:51,935 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:30:51,938 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:30:51,939 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:30:51,941 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:30:51,941 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:30:51,942 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:30:51,945 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:30:51,946 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:30:51,948 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:30:51,948 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:30:51,950 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:30:51,950 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:30:51,950 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:30:51,951 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:30:51,952 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:30:51,955 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b699649b-1b66-4d93-bdcb-6a4ddac9e3ef/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-11 02:30:52,006 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:30:52,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:30:52,008 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:30:52,009 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:30:52,009 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:30:52,017 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:30:52,017 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:30:52,017 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:30:52,018 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:30:52,018 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:30:52,019 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:30:52,020 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:30:52,020 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:30:52,020 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:30:52,020 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:30:52,021 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 02:30:52,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 02:30:52,022 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:30:52,022 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:30:52,022 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 02:30:52,023 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:30:52,023 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:30:52,023 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:30:52,023 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-11 02:30:52,024 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-11 02:30:52,024 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-11 02:30:52,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:30:52,026 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:30:52,026 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:30:52,027 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:30:52,027 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:30:52,027 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:30:52,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:30:52,028 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:30:52,028 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:30:52,028 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:30:52,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:30:52,029 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:30:52,029 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:30:52,029 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b699649b-1b66-4d93-bdcb-6a4ddac9e3ef/bin/utaipan-WLngWcDbfI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b699649b-1b66-4d93-bdcb-6a4ddac9e3ef/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44834c55142a76240cb3980fc2bb6f5aeaa27c83 [2021-10-11 02:30:52,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:30:52,367 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:30:52,370 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:30:52,372 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:30:52,374 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:30:52,375 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b699649b-1b66-4d93-bdcb-6a4ddac9e3ef/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c [2021-10-11 02:30:52,489 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b699649b-1b66-4d93-bdcb-6a4ddac9e3ef/bin/utaipan-WLngWcDbfI/data/646233e7a/0e91ec367f5e4b2482871c4da9cd8708/FLAG7e1188ed7 [2021-10-11 02:30:53,034 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:30:53,035 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b699649b-1b66-4d93-bdcb-6a4ddac9e3ef/sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c [2021-10-11 02:30:53,046 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b699649b-1b66-4d93-bdcb-6a4ddac9e3ef/bin/utaipan-WLngWcDbfI/data/646233e7a/0e91ec367f5e4b2482871c4da9cd8708/FLAG7e1188ed7 [2021-10-11 02:30:53,382 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b699649b-1b66-4d93-bdcb-6a4ddac9e3ef/bin/utaipan-WLngWcDbfI/data/646233e7a/0e91ec367f5e4b2482871c4da9cd8708 [2021-10-11 02:30:53,384 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:30:53,385 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:30:53,389 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:30:53,389 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:30:53,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:30:53,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:30:53" (1/1) ... [2021-10-11 02:30:53,398 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10a40cdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:53, skipping insertion in model container [2021-10-11 02:30:53,398 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:30:53" (1/1) ... [2021-10-11 02:30:53,408 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:30:53,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:30:53,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:30:53,609 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:30:53,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:30:53,636 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:30:53,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:53 WrapperNode [2021-10-11 02:30:53,637 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:30:53,638 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:30:53,639 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:30:53,639 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:30:53,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:53" (1/1) ... [2021-10-11 02:30:53,652 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:53" (1/1) ... [2021-10-11 02:30:53,669 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:30:53,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:30:53,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:30:53,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:30:53,679 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:53" (1/1) ... [2021-10-11 02:30:53,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:53" (1/1) ... [2021-10-11 02:30:53,680 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:53" (1/1) ... [2021-10-11 02:30:53,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:53" (1/1) ... [2021-10-11 02:30:53,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:53" (1/1) ... [2021-10-11 02:30:53,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:53" (1/1) ... [2021-10-11 02:30:53,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:53" (1/1) ... [2021-10-11 02:30:53,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:30:53,692 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:30:53,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:30:53,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:30:53,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:53" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b699649b-1b66-4d93-bdcb-6a4ddac9e3ef/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:30:53,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:30:53,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:30:53,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:30:53,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:30:53,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:30:54,123 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:30:54,124 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-11 02:30:54,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:30:54 BoogieIcfgContainer [2021-10-11 02:30:54,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:30:54,127 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:30:54,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:30:54,144 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:30:54,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:30:53" (1/3) ... [2021-10-11 02:30:54,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548dec10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:30:54, skipping insertion in model container [2021-10-11 02:30:54,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:53" (2/3) ... [2021-10-11 02:30:54,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548dec10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:30:54, skipping insertion in model container [2021-10-11 02:30:54,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:30:54" (3/3) ... [2021-10-11 02:30:54,147 INFO L111 eAbstractionObserver]: Analyzing ICFG derefAfterFree2.c [2021-10-11 02:30:54,161 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:30:54,179 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2021-10-11 02:30:54,189 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-10-11 02:30:54,208 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:30:54,209 INFO L378 AbstractCegarLoop]: Hoare is false [2021-10-11 02:30:54,209 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:30:54,209 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:30:54,209 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:30:54,209 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:30:54,209 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:30:54,210 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:30:54,221 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2021-10-11 02:30:54,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:30:54,227 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:54,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:30:54,228 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:30:54,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:54,234 INFO L82 PathProgramCache]: Analyzing trace with hash 64636, now seen corresponding path program 1 times [2021-10-11 02:30:54,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:54,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585181160] [2021-10-11 02:30:54,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:54,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:54,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:54,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585181160] [2021-10-11 02:30:54,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:30:54,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:30:54,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931742422] [2021-10-11 02:30:54,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:30:54,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:30:54,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:30:54,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:54,424 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 3 states. [2021-10-11 02:30:54,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:54,466 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-10-11 02:30:54,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:30:54,468 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:30:54,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:54,477 INFO L225 Difference]: With dead ends: 22 [2021-10-11 02:30:54,477 INFO L226 Difference]: Without dead ends: 21 [2021-10-11 02:30:54,478 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 [2021-10-11 02:30:54,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-11 02:30:54,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2021-10-11 02:30:54,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-11 02:30:54,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-10-11 02:30:54,510 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 3 [2021-10-11 02:30:54,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:54,511 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-10-11 02:30:54,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:30:54,511 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-10-11 02:30:54,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:30:54,512 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:54,512 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:30:54,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:30:54,513 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:30:54,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:54,514 INFO L82 PathProgramCache]: Analyzing trace with hash 63748, now seen corresponding path program 1 times [2021-10-11 02:30:54,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:54,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698431562] [2021-10-11 02:30:54,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:54,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:54,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698431562] [2021-10-11 02:30:54,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:30:54,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:30:54,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807388650] [2021-10-11 02:30:54,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:30:54,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:30:54,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:30:54,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:54,549 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 3 states. [2021-10-11 02:30:54,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:54,573 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-10-11 02:30:54,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:30:54,574 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:30:54,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:54,575 INFO L225 Difference]: With dead ends: 23 [2021-10-11 02:30:54,575 INFO L226 Difference]: Without dead ends: 23 [2021-10-11 02:30:54,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:54,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-11 02:30:54,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-10-11 02:30:54,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-11 02:30:54,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-10-11 02:30:54,580 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 3 [2021-10-11 02:30:54,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:54,581 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-10-11 02:30:54,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:30:54,581 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-10-11 02:30:54,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:30:54,581 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:54,582 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:30:54,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:30:54,582 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:30:54,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:54,583 INFO L82 PathProgramCache]: Analyzing trace with hash 63749, now seen corresponding path program 1 times [2021-10-11 02:30:54,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:54,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185459299] [2021-10-11 02:30:54,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:54,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:54,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185459299] [2021-10-11 02:30:54,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:30:54,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:30:54,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853548776] [2021-10-11 02:30:54,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:30:54,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:30:54,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:30:54,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:54,632 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2021-10-11 02:30:54,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:54,661 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-10-11 02:30:54,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:30:54,662 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:30:54,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:54,663 INFO L225 Difference]: With dead ends: 21 [2021-10-11 02:30:54,663 INFO L226 Difference]: Without dead ends: 21 [2021-10-11 02:30:54,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:54,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-11 02:30:54,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-10-11 02:30:54,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-11 02:30:54,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-10-11 02:30:54,667 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 3 [2021-10-11 02:30:54,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:54,667 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-10-11 02:30:54,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:30:54,668 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-10-11 02:30:54,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:30:54,668 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:54,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:54,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:30:54,669 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:30:54,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:54,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1257107777, now seen corresponding path program 1 times [2021-10-11 02:30:54,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:54,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183071951] [2021-10-11 02:30:54,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:54,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:54,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:54,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183071951] [2021-10-11 02:30:54,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297975422] [2021-10-11 02:30:54,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b699649b-1b66-4d93-bdcb-6a4ddac9e3ef/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:30:54,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:54,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:30:54,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:30:54,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:54,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:30:54,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:54,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1986414240] [2021-10-11 02:30:54,933 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:30:54,934 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:30:54,939 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:30:54,945 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:30:54,946 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:30:55,675 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:30:55,827 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 44 [2021-10-11 02:30:56,031 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-10-11 02:30:56,367 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2021-10-11 02:30:56,370 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:30:56,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:30:56,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-10-11 02:30:56,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934495725] [2021-10-11 02:30:56,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 02:30:56,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:30:56,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 02:30:56,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:30:56,372 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 7 states. [2021-10-11 02:30:56,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:56,430 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-10-11 02:30:56,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:30:56,431 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2021-10-11 02:30:56,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:56,432 INFO L225 Difference]: With dead ends: 32 [2021-10-11 02:30:56,432 INFO L226 Difference]: Without dead ends: 32 [2021-10-11 02:30:56,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:30:56,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-11 02:30:56,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-10-11 02:30:56,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-10-11 02:30:56,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-10-11 02:30:56,438 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 7 [2021-10-11 02:30:56,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:56,438 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-10-11 02:30:56,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 02:30:56,438 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-10-11 02:30:56,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:30:56,439 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:56,439 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-10-11 02:30:56,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-10-11 02:30:56,653 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:30:56,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:56,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1257108664, now seen corresponding path program 1 times [2021-10-11 02:30:56,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:56,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831809266] [2021-10-11 02:30:56,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:56,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:56,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:56,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831809266] [2021-10-11 02:30:56,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159361353] [2021-10-11 02:30:56,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b699649b-1b66-4d93-bdcb-6a4ddac9e3ef/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-11 02:30:56,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:56,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-11 02:30:56,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:30:56,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:56,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:30:56,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:56,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1417548147] [2021-10-11 02:30:56,853 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-11 02:30:56,854 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:30:56,854 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:30:56,854 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:30:56,855 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:30:57,119 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:30:57,358 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-10-11 02:30:57,524 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:30:57,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:30:57,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2021-10-11 02:30:57,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640100155] [2021-10-11 02:30:57,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 02:30:57,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:30:57,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 02:30:57,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-11 02:30:57,526 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 7 states. [2021-10-11 02:30:57,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:57,617 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2021-10-11 02:30:57,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:30:57,618 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2021-10-11 02:30:57,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:57,620 INFO L225 Difference]: With dead ends: 40 [2021-10-11 02:30:57,620 INFO L226 Difference]: Without dead ends: 40 [2021-10-11 02:30:57,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:30:57,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-11 02:30:57,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2021-10-11 02:30:57,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-10-11 02:30:57,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-10-11 02:30:57,626 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 7 [2021-10-11 02:30:57,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:57,627 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-10-11 02:30:57,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 02:30:57,627 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-10-11 02:30:57,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-11 02:30:57,627 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:57,628 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1] [2021-10-11 02:30:57,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-11 02:30:57,845 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:30:57,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:57,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1518770230, now seen corresponding path program 1 times [2021-10-11 02:30:57,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:57,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040606801] [2021-10-11 02:30:57,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:57,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:57,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:57,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040606801] [2021-10-11 02:30:57,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224531017] [2021-10-11 02:30:57,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b699649b-1b66-4d93-bdcb-6a4ddac9e3ef/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:30:57,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:57,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 02:30:57,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:30:57,994 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:57,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:30:58,043 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:58,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2010166225] [2021-10-11 02:30:58,056 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:30:58,056 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:30:58,057 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:30:58,057 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:30:58,057 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:30:58,328 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:30:58,496 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-10-11 02:30:58,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:30:58,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4, 4] total 12 [2021-10-11 02:30:58,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923846104] [2021-10-11 02:30:58,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 02:30:58,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:30:58,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 02:30:58,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:30:58,732 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 7 states. [2021-10-11 02:30:58,908 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-10-11 02:30:59,086 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-10-11 02:30:59,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:59,255 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-10-11 02:30:59,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-11 02:30:59,256 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2021-10-11 02:30:59,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:59,257 INFO L225 Difference]: With dead ends: 43 [2021-10-11 02:30:59,257 INFO L226 Difference]: Without dead ends: 43 [2021-10-11 02:30:59,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-10-11 02:30:59,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-11 02:30:59,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2021-10-11 02:30:59,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-10-11 02:30:59,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-10-11 02:30:59,262 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 13 [2021-10-11 02:30:59,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:59,263 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-10-11 02:30:59,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 02:30:59,263 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-10-11 02:30:59,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-11 02:30:59,263 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:59,264 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2021-10-11 02:30:59,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-10-11 02:30:59,477 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:30:59,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:59,477 INFO L82 PathProgramCache]: Analyzing trace with hash 162763176, now seen corresponding path program 1 times [2021-10-11 02:30:59,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:59,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731682866] [2021-10-11 02:30:59,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:59,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:59,518 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:59,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731682866] [2021-10-11 02:30:59,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712535751] [2021-10-11 02:30:59,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b699649b-1b66-4d93-bdcb-6a4ddac9e3ef/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:30:59,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:59,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 02:30:59,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:30:59,590 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:59,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:30:59,631 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:59,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [229193437] [2021-10-11 02:30:59,633 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-11 02:30:59,634 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:30:59,634 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:30:59,634 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:30:59,634 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:30:59,839 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:31:00,053 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-10-11 02:31:00,314 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:31:00,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:31:00,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-10-11 02:31:00,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657120865] [2021-10-11 02:31:00,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:31:00,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:00,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:31:00,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-10-11 02:31:00,316 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 8 states. [2021-10-11 02:31:00,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:00,383 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-10-11 02:31:00,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:31:00,384 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2021-10-11 02:31:00,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:00,386 INFO L225 Difference]: With dead ends: 37 [2021-10-11 02:31:00,386 INFO L226 Difference]: Without dead ends: 37 [2021-10-11 02:31:00,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-10-11 02:31:00,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-11 02:31:00,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-10-11 02:31:00,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-10-11 02:31:00,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-10-11 02:31:00,397 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 14 [2021-10-11 02:31:00,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:00,397 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-10-11 02:31:00,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:31:00,397 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-10-11 02:31:00,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-11 02:31:00,398 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:00,398 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1] [2021-10-11 02:31:00,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:31:00,609 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:31:00,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:00,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1930635537, now seen corresponding path program 2 times [2021-10-11 02:31:00,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:00,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768364112] [2021-10-11 02:31:00,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:00,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:00,711 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:00,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768364112] [2021-10-11 02:31:00,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275475269] [2021-10-11 02:31:00,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b699649b-1b66-4d93-bdcb-6a4ddac9e3ef/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:31:00,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-11 02:31:00,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:31:00,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-11 02:31:00,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:31:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-11 02:31:00,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:31:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-11 02:31:01,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:31:01,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 13 [2021-10-11 02:31:01,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871231468] [2021-10-11 02:31:01,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:31:01,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:01,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:31:01,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-10-11 02:31:01,068 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 6 states. [2021-10-11 02:31:01,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:01,101 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-10-11 02:31:01,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:31:01,101 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2021-10-11 02:31:01,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:01,102 INFO L225 Difference]: With dead ends: 34 [2021-10-11 02:31:01,102 INFO L226 Difference]: Without dead ends: 34 [2021-10-11 02:31:01,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-10-11 02:31:01,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-11 02:31:01,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-10-11 02:31:01,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-10-11 02:31:01,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-10-11 02:31:01,106 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 19 [2021-10-11 02:31:01,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:01,107 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-10-11 02:31:01,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:31:01,107 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-10-11 02:31:01,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-11 02:31:01,108 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:01,108 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1] [2021-10-11 02:31:01,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:31:01,333 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:31:01,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:01,333 INFO L82 PathProgramCache]: Analyzing trace with hash -197830453, now seen corresponding path program 2 times [2021-10-11 02:31:01,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:01,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802221322] [2021-10-11 02:31:01,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:01,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:01,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802221322] [2021-10-11 02:31:01,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445495889] [2021-10-11 02:31:01,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b699649b-1b66-4d93-bdcb-6a4ddac9e3ef/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:31:01,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-11 02:31:01,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:31:01,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 02:31:01,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:31:01,539 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:01,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:31:01,632 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:01,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1187947795] [2021-10-11 02:31:01,636 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:31:01,636 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:31:01,637 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:31:01,637 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:31:01,637 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:31:01,889 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:31:02,013 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 44 [2021-10-11 02:31:02,183 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-10-11 02:31:02,481 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:31:02,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:31:02,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2021-10-11 02:31:02,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189602775] [2021-10-11 02:31:02,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-10-11 02:31:02,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:02,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-11 02:31:02,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-10-11 02:31:02,484 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 13 states. [2021-10-11 02:31:02,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:02,615 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-10-11 02:31:02,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-11 02:31:02,615 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2021-10-11 02:31:02,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:02,616 INFO L225 Difference]: With dead ends: 49 [2021-10-11 02:31:02,617 INFO L226 Difference]: Without dead ends: 49 [2021-10-11 02:31:02,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-10-11 02:31:02,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-11 02:31:02,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-10-11 02:31:02,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-10-11 02:31:02,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-10-11 02:31:02,621 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 23 [2021-10-11 02:31:02,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:02,622 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-10-11 02:31:02,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-10-11 02:31:02,622 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-10-11 02:31:02,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-11 02:31:02,623 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:02,623 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2021-10-11 02:31:02,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:31:02,837 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:31:02,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:02,837 INFO L82 PathProgramCache]: Analyzing trace with hash -898363457, now seen corresponding path program 2 times [2021-10-11 02:31:02,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:02,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5106367] [2021-10-11 02:31:02,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:02,916 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-10-11 02:31:02,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5106367] [2021-10-11 02:31:02,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:02,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:31:02,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090615289] [2021-10-11 02:31:02,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:31:02,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:02,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:31:02,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:31:02,919 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 3 states. [2021-10-11 02:31:02,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:02,926 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2021-10-11 02:31:02,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:31:02,927 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2021-10-11 02:31:02,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:02,928 INFO L225 Difference]: With dead ends: 48 [2021-10-11 02:31:02,928 INFO L226 Difference]: Without dead ends: 48 [2021-10-11 02:31:02,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:31:02,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-11 02:31:02,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-10-11 02:31:02,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-10-11 02:31:02,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-10-11 02:31:02,933 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 26 [2021-10-11 02:31:02,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:02,933 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-10-11 02:31:02,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:31:02,933 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-10-11 02:31:02,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-11 02:31:02,934 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:02,935 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:02,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-10-11 02:31:02,935 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:31:02,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:02,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1316000454, now seen corresponding path program 1 times [2021-10-11 02:31:02,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:02,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597903293] [2021-10-11 02:31:02,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:31:02,959 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:31:02,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:31:02,979 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:31:03,007 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:31:03,008 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:31:03,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-10-11 02:31:03,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:31:03 BoogieIcfgContainer [2021-10-11 02:31:03,056 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:31:03,057 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:31:03,057 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:31:03,057 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:31:03,058 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:30:54" (3/4) ... [2021-10-11 02:31:03,060 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:31:03,117 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b699649b-1b66-4d93-bdcb-6a4ddac9e3ef/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:31:03,117 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:31:03,118 INFO L168 Benchmark]: Toolchain (without parser) took 9732.74 ms. Allocated memory was 125.8 MB in the beginning and 237.0 MB in the end (delta: 111.1 MB). Free memory was 89.8 MB in the beginning and 199.7 MB in the end (delta: -109.9 MB). Peak memory consumption was 506.0 kB. Max. memory is 16.1 GB. [2021-10-11 02:31:03,118 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 125.8 MB. Free memory was 98.2 MB in the beginning and 98.2 MB in the end (delta: 30.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:31:03,121 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.87 ms. Allocated memory is still 125.8 MB. Free memory was 89.6 MB in the beginning and 101.1 MB in the end (delta: -11.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:03,121 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.05 ms. Allocated memory is still 125.8 MB. Free memory was 101.1 MB in the beginning and 99.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:03,122 INFO L168 Benchmark]: Boogie Preprocessor took 21.54 ms. Allocated memory is still 125.8 MB. Free memory was 99.8 MB in the beginning and 98.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:31:03,122 INFO L168 Benchmark]: RCFGBuilder took 433.62 ms. Allocated memory is still 125.8 MB. Free memory was 98.6 MB in the beginning and 84.5 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:03,123 INFO L168 Benchmark]: TraceAbstraction took 8929.09 ms. Allocated memory was 125.8 MB in the beginning and 237.0 MB in the end (delta: 111.1 MB). Free memory was 84.5 MB in the beginning and 201.8 MB in the end (delta: -117.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:31:03,123 INFO L168 Benchmark]: Witness Printer took 60.14 ms. Allocated memory is still 237.0 MB. Free memory was 201.8 MB in the beginning and 199.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:03,126 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 125.8 MB. Free memory was 98.2 MB in the beginning and 98.2 MB in the end (delta: 30.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 248.87 ms. Allocated memory is still 125.8 MB. Free memory was 89.6 MB in the beginning and 101.1 MB in the end (delta: -11.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.05 ms. Allocated memory is still 125.8 MB. Free memory was 101.1 MB in the beginning and 99.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.54 ms. Allocated memory is still 125.8 MB. Free memory was 99.8 MB in the beginning and 98.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 433.62 ms. Allocated memory is still 125.8 MB. Free memory was 98.6 MB in the beginning and 84.5 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8929.09 ms. Allocated memory was 125.8 MB in the beginning and 237.0 MB in the end (delta: 111.1 MB). Free memory was 84.5 MB in the beginning and 201.8 MB in the end (delta: -117.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 60.14 ms. Allocated memory is still 237.0 MB. Free memory was 201.8 MB in the beginning and 199.7 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: 9]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L6] int* p = malloc(10 * sizeof(int)); [L8] int i = 0; [L8] COND TRUE i < 10 [L9] p[i] = 1 [L10] COND FALSE !(i == 5) [L8] i++ [L8] COND TRUE i < 10 [L9] p[i] = 1 [L10] COND FALSE !(i == 5) [L8] i++ [L8] COND TRUE i < 10 [L9] p[i] = 1 [L10] COND FALSE !(i == 5) [L8] i++ [L8] COND TRUE i < 10 [L9] p[i] = 1 [L10] COND FALSE !(i == 5) [L8] i++ [L8] COND TRUE i < 10 [L9] p[i] = 1 [L10] COND FALSE !(i == 5) [L8] i++ [L8] COND TRUE i < 10 [L9] p[i] = 1 [L10] COND TRUE i == 5 [L11] free(p) [L11] free(p) [L11] free(p) [L8] i++ [L8] COND TRUE i < 10 [L9] p[i] = 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.8s, OverallIterations: 11, TraceHistogramMax: 7, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 74 SDtfs, 194 SDslu, 68 SDs, 0 SdLazy, 276 SolverSat, 36 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 252 GetRequests, 164 SyntacticMatches, 6 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=9, 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, 10 MinimizatonAttempts, 21 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 231 NumberOfCodeBlocks, 219 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 262 ConstructedInterpolants, 0 QuantifiedInterpolants, 28992 SizeOfPredicates, 5 NumberOfNonLiveVariables, 272 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 22 InterpolantComputations, 5 PerfectInterpolantSequences, 105/355 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]: 272, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 6, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 19, TOOLS_POST_TIME[ms]: 153, 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: 19, TOOLS_QUANTIFIERELIM_TIME[ms]: 148, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 72, FLUID_QUERY_TIME[ms]: 1, FLUID_QUERIES: 34, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 1, DOMAIN_JOIN_TIME[ms]: 22, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME[ms]: 68, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME[ms]: 5, DOMAIN_ISBOTTOM_APPLICATIONS: 6, DOMAIN_ISBOTTOM_TIME[ms]: 7, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 194, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 194, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, 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]: 0, PATH_EXPR_TIME[ms]: 1, REGEX_TO_DAG_TIME[ms]: 1, DAG_COMPRESSION_TIME[ms]: 7, DAG_COMPRESSION_PROCESSED_NODES: 49, DAG_COMPRESSION_RETAINED_NODES: 24, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...