./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/realloc1.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_4b38c03a-b896-408b-8c02-63cc76c1a349/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b38c03a-b896-408b-8c02-63cc76c1a349/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_4b38c03a-b896-408b-8c02-63cc76c1a349/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b38c03a-b896-408b-8c02-63cc76c1a349/bin/utaipan-WLngWcDbfI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/realloc1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b38c03a-b896-408b-8c02-63cc76c1a349/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_4b38c03a-b896-408b-8c02-63cc76c1a349/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 937cfa07aecfb3a07a3e6e685c2e5e481fbe44b8 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 02:26:39,909 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:26:39,911 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:26:39,942 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:26:39,943 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:26:39,944 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:26:39,946 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:26:39,949 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:26:39,951 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:26:39,952 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:26:39,954 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:26:39,955 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:26:39,956 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:26:39,958 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:26:39,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:26:39,961 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:26:39,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:26:39,963 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:26:39,965 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:26:39,968 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:26:39,970 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:26:39,976 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:26:39,978 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:26:39,980 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:26:39,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:26:39,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:26:39,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:26:39,993 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:26:39,997 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:26:39,998 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:26:39,999 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:26:40,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:26:40,002 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:26:40,004 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:26:40,005 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:26:40,005 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:26:40,006 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:26:40,007 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:26:40,007 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:26:40,008 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:26:40,009 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:26:40,011 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b38c03a-b896-408b-8c02-63cc76c1a349/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-11 02:26:40,063 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:26:40,064 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:26:40,065 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:26:40,072 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:26:40,072 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:26:40,072 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:26:40,072 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:26:40,073 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:26:40,073 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:26:40,073 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:26:40,074 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:26:40,075 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:26:40,075 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:26:40,075 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:26:40,076 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:26:40,076 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 02:26:40,077 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 02:26:40,077 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:26:40,077 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:26:40,077 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 02:26:40,078 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:26:40,078 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:26:40,078 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:26:40,079 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-11 02:26:40,079 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-11 02:26:40,079 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-11 02:26:40,081 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:26:40,081 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:26:40,082 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:26:40,082 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:26:40,082 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:26:40,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:26:40,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:26:40,083 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:26:40,083 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:26:40,084 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:26:40,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:26:40,084 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:26:40,084 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:26:40,085 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_4b38c03a-b896-408b-8c02-63cc76c1a349/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b38c03a-b896-408b-8c02-63cc76c1a349/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 937cfa07aecfb3a07a3e6e685c2e5e481fbe44b8 [2021-10-11 02:26:40,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:26:40,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:26:40,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:26:40,439 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:26:40,440 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:26:40,441 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b38c03a-b896-408b-8c02-63cc76c1a349/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/memsafety-ext3/realloc1.c [2021-10-11 02:26:40,506 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b38c03a-b896-408b-8c02-63cc76c1a349/bin/utaipan-WLngWcDbfI/data/72ada697a/c2dfea097c864e44a5cd99d60d88cc3b/FLAG7ad44b212 [2021-10-11 02:26:41,020 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:26:41,021 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b38c03a-b896-408b-8c02-63cc76c1a349/sv-benchmarks/c/memsafety-ext3/realloc1.c [2021-10-11 02:26:41,029 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b38c03a-b896-408b-8c02-63cc76c1a349/bin/utaipan-WLngWcDbfI/data/72ada697a/c2dfea097c864e44a5cd99d60d88cc3b/FLAG7ad44b212 [2021-10-11 02:26:41,386 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b38c03a-b896-408b-8c02-63cc76c1a349/bin/utaipan-WLngWcDbfI/data/72ada697a/c2dfea097c864e44a5cd99d60d88cc3b [2021-10-11 02:26:41,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:26:41,391 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:26:41,398 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:26:41,398 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:26:41,405 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:26:41,407 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:41" (1/1) ... [2021-10-11 02:26:41,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65868892 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:41, skipping insertion in model container [2021-10-11 02:26:41,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:41" (1/1) ... [2021-10-11 02:26:41,416 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:26:41,432 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:26:41,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:26:41,679 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:26:41,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:26:41,707 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:26:41,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:41 WrapperNode [2021-10-11 02:26:41,708 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:26:41,709 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:26:41,710 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:26:41,710 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:26:41,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:41" (1/1) ... [2021-10-11 02:26:41,725 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:41" (1/1) ... [2021-10-11 02:26:41,743 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:26:41,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:26:41,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:26:41,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:26:41,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:41" (1/1) ... [2021-10-11 02:26:41,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:41" (1/1) ... [2021-10-11 02:26:41,755 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:41" (1/1) ... [2021-10-11 02:26:41,755 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:41" (1/1) ... [2021-10-11 02:26:41,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:41" (1/1) ... [2021-10-11 02:26:41,764 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:41" (1/1) ... [2021-10-11 02:26:41,765 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:41" (1/1) ... [2021-10-11 02:26:41,767 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:26:41,768 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:26:41,769 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:26:41,769 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:26:41,770 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:41" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b38c03a-b896-408b-8c02-63cc76c1a349/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 02:26:41,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:26:41,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:26:41,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:26:41,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:26:41,839 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:26:41,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:26:42,344 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:26:42,345 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-11 02:26:42,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:42 BoogieIcfgContainer [2021-10-11 02:26:42,359 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:26:42,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:26:42,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:26:42,365 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:26:42,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:26:41" (1/3) ... [2021-10-11 02:26:42,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a9ca6cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:42, skipping insertion in model container [2021-10-11 02:26:42,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:41" (2/3) ... [2021-10-11 02:26:42,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a9ca6cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:42, skipping insertion in model container [2021-10-11 02:26:42,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:42" (3/3) ... [2021-10-11 02:26:42,368 INFO L111 eAbstractionObserver]: Analyzing ICFG realloc1.c [2021-10-11 02:26:42,391 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:26:42,394 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2021-10-11 02:26:42,407 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-10-11 02:26:42,426 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:26:42,426 INFO L378 AbstractCegarLoop]: Hoare is false [2021-10-11 02:26:42,427 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:26:42,427 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:26:42,427 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:26:42,427 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:26:42,428 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:26:42,428 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:26:42,441 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2021-10-11 02:26:42,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:26:42,447 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:42,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:26:42,448 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:26:42,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:42,454 INFO L82 PathProgramCache]: Analyzing trace with hash 76559, now seen corresponding path program 1 times [2021-10-11 02:26:42,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:42,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072827907] [2021-10-11 02:26:42,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:42,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:42,603 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 02:26:42,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072827907] [2021-10-11 02:26:42,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:42,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:26:42,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830896247] [2021-10-11 02:26:42,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:26:42,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:42,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:26:42,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:42,630 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2021-10-11 02:26:42,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:42,661 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-10-11 02:26:42,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:26:42,663 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:26:42,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:42,671 INFO L225 Difference]: With dead ends: 21 [2021-10-11 02:26:42,671 INFO L226 Difference]: Without dead ends: 20 [2021-10-11 02:26:42,673 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 02:26:42,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-11 02:26:42,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-10-11 02:26:42,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-11 02:26:42,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-10-11 02:26:42,703 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 3 [2021-10-11 02:26:42,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:42,703 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-10-11 02:26:42,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:26:42,703 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-10-11 02:26:42,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:26:42,704 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:42,704 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:26:42,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:26:42,704 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:26:42,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:42,705 INFO L82 PathProgramCache]: Analyzing trace with hash 75280, now seen corresponding path program 1 times [2021-10-11 02:26:42,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:42,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395405290] [2021-10-11 02:26:42,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:42,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:42,768 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 02:26:42,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395405290] [2021-10-11 02:26:42,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:42,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:26:42,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333834047] [2021-10-11 02:26:42,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:26:42,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:42,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:26:42,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:42,771 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 3 states. [2021-10-11 02:26:42,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:42,800 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-10-11 02:26:42,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:26:42,801 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:26:42,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:42,802 INFO L225 Difference]: With dead ends: 15 [2021-10-11 02:26:42,802 INFO L226 Difference]: Without dead ends: 15 [2021-10-11 02:26:42,803 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 02:26:42,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-11 02:26:42,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-11 02:26:42,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-11 02:26:42,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-10-11 02:26:42,806 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 3 [2021-10-11 02:26:42,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:42,807 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-10-11 02:26:42,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:26:42,807 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-10-11 02:26:42,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:26:42,807 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:42,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:26:42,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:26:42,808 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:26:42,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:42,809 INFO L82 PathProgramCache]: Analyzing trace with hash 75281, now seen corresponding path program 1 times [2021-10-11 02:26:42,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:42,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785040929] [2021-10-11 02:26:42,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:42,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:42,855 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 02:26:42,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785040929] [2021-10-11 02:26:42,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:42,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:26:42,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581131740] [2021-10-11 02:26:42,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:26:42,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:42,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:26:42,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:42,858 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 3 states. [2021-10-11 02:26:42,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:42,888 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-10-11 02:26:42,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:26:42,888 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:26:42,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:42,889 INFO L225 Difference]: With dead ends: 16 [2021-10-11 02:26:42,889 INFO L226 Difference]: Without dead ends: 16 [2021-10-11 02:26:42,890 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 02:26:42,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-11 02:26:42,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-11 02:26:42,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-11 02:26:42,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-10-11 02:26:42,893 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 3 [2021-10-11 02:26:42,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:42,894 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-10-11 02:26:42,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:26:42,894 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-10-11 02:26:42,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:26:42,894 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:42,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-11 02:26:42,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:26:42,895 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:26:42,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:42,896 INFO L82 PathProgramCache]: Analyzing trace with hash 72381238, now seen corresponding path program 1 times [2021-10-11 02:26:42,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:42,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211677804] [2021-10-11 02:26:42,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:42,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:42,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:26:42,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211677804] [2021-10-11 02:26:42,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:42,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:26:42,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205332001] [2021-10-11 02:26:42,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:26:42,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:42,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:26:42,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:42,945 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states. [2021-10-11 02:26:42,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:42,956 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-10-11 02:26:42,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:26:42,960 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2021-10-11 02:26:42,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:42,961 INFO L225 Difference]: With dead ends: 15 [2021-10-11 02:26:42,961 INFO L226 Difference]: Without dead ends: 15 [2021-10-11 02:26:42,962 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 02:26:42,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-11 02:26:42,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-11 02:26:42,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-11 02:26:42,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-10-11 02:26:42,965 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 5 [2021-10-11 02:26:42,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:42,965 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-10-11 02:26:42,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:26:42,965 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-10-11 02:26:42,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:26:42,966 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:42,966 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2021-10-11 02:26:42,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 02:26:42,966 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:26:42,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:42,967 INFO L82 PathProgramCache]: Analyzing trace with hash 72379960, now seen corresponding path program 1 times [2021-10-11 02:26:42,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:42,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137580813] [2021-10-11 02:26:42,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:42,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:43,059 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 02:26:43,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137580813] [2021-10-11 02:26:43,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753782412] [2021-10-11 02:26:43,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b38c03a-b896-408b-8c02-63cc76c1a349/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 02:26:43,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:43,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-11 02:26:43,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:43,237 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-11 02:26:43,238 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:26:43,250 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:26:43,252 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:26:43,253 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2021-10-11 02:26:43,299 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 02:26:43,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:43,351 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 02:26:43,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1867368074] [2021-10-11 02:26:43,382 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2021-10-11 02:26:43,382 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:26:43,386 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:26:43,391 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:26:43,391 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:26:43,873 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:26:44,090 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:26:44,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:26:44,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2021-10-11 02:26:44,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602228529] [2021-10-11 02:26:44,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:26:44,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:44,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:26:44,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-11 02:26:44,094 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2021-10-11 02:26:44,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:44,218 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-10-11 02:26:44,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:26:44,219 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2021-10-11 02:26:44,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:44,222 INFO L225 Difference]: With dead ends: 35 [2021-10-11 02:26:44,222 INFO L226 Difference]: Without dead ends: 35 [2021-10-11 02:26:44,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-11 02:26:44,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-11 02:26:44,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 21. [2021-10-11 02:26:44,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-11 02:26:44,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-10-11 02:26:44,236 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 5 [2021-10-11 02:26:44,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:44,237 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-10-11 02:26:44,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:26:44,241 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-10-11 02:26:44,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:26:44,242 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:44,242 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2021-10-11 02:26:44,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:44,455 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:26:44,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:44,455 INFO L82 PathProgramCache]: Analyzing trace with hash 198927928, now seen corresponding path program 1 times [2021-10-11 02:26:44,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:44,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967921479] [2021-10-11 02:26:44,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:44,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:44,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967921479] [2021-10-11 02:26:44,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527529955] [2021-10-11 02:26:44,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b38c03a-b896-408b-8c02-63cc76c1a349/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:44,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:44,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 02:26:44,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:44,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:44,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:44,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:44,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1015195158] [2021-10-11 02:26:44,620 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-11 02:26:44,620 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:26:44,620 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:26:44,620 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:26:44,621 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:26:44,864 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:26:45,079 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:26:45,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:26:45,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-10-11 02:26:45,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675755927] [2021-10-11 02:26:45,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:26:45,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:45,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:26:45,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-10-11 02:26:45,081 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 8 states. [2021-10-11 02:26:45,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:45,116 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2021-10-11 02:26:45,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 02:26:45,117 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2021-10-11 02:26:45,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:45,118 INFO L225 Difference]: With dead ends: 25 [2021-10-11 02:26:45,118 INFO L226 Difference]: Without dead ends: 25 [2021-10-11 02:26:45,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-10-11 02:26:45,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-11 02:26:45,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-10-11 02:26:45,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-11 02:26:45,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-10-11 02:26:45,122 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 8 [2021-10-11 02:26:45,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:45,122 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-10-11 02:26:45,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:26:45,123 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-10-11 02:26:45,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:26:45,123 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:45,123 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2021-10-11 02:26:45,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:45,339 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:26:45,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:45,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1941212115, now seen corresponding path program 2 times [2021-10-11 02:26:45,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:45,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126731861] [2021-10-11 02:26:45,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:45,463 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:45,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126731861] [2021-10-11 02:26:45,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:45,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-11 02:26:45,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453097612] [2021-10-11 02:26:45,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:26:45,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:45,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:26:45,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-11 02:26:45,469 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2021-10-11 02:26:45,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:45,532 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-10-11 02:26:45,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 02:26:45,534 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2021-10-11 02:26:45,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:45,537 INFO L225 Difference]: With dead ends: 22 [2021-10-11 02:26:45,537 INFO L226 Difference]: Without dead ends: 22 [2021-10-11 02:26:45,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-11 02:26:45,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-11 02:26:45,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-11 02:26:45,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-11 02:26:45,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-10-11 02:26:45,545 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 11 [2021-10-11 02:26:45,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:45,545 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-10-11 02:26:45,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:26:45,546 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-10-11 02:26:45,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-11 02:26:45,546 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:45,547 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1] [2021-10-11 02:26:45,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-10-11 02:26:45,547 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:26:45,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:45,548 INFO L82 PathProgramCache]: Analyzing trace with hash -409368164, now seen corresponding path program 2 times [2021-10-11 02:26:45,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:45,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192494999] [2021-10-11 02:26:45,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:45,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:45,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192494999] [2021-10-11 02:26:45,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110145975] [2021-10-11 02:26:45,676 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_4b38c03a-b896-408b-8c02-63cc76c1a349/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-11 02:26:45,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-10-11 02:26:45,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:26:45,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:45,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:45,738 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-11 02:26:45,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:45,754 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-11 02:26:45,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:26:45,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [8] total 9 [2021-10-11 02:26:45,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517107432] [2021-10-11 02:26:45,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:26:45,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:45,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:26:45,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-11 02:26:45,759 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 3 states. [2021-10-11 02:26:45,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:45,770 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-10-11 02:26:45,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:26:45,771 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2021-10-11 02:26:45,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:45,771 INFO L225 Difference]: With dead ends: 21 [2021-10-11 02:26:45,772 INFO L226 Difference]: Without dead ends: 21 [2021-10-11 02:26:45,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-11 02:26:45,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-11 02:26:45,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-10-11 02:26:45,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-11 02:26:45,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-10-11 02:26:45,779 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 16 [2021-10-11 02:26:45,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:45,780 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-10-11 02:26:45,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:26:45,780 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-10-11 02:26:45,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 02:26:45,781 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:45,781 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:46,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-11 02:26:46,002 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:26:46,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:46,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1734187391, now seen corresponding path program 1 times [2021-10-11 02:26:46,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:46,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398366151] [2021-10-11 02:26:46,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:46,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:46,069 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:46,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398366151] [2021-10-11 02:26:46,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940333760] [2021-10-11 02:26:46,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b38c03a-b896-408b-8c02-63cc76c1a349/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 02:26:46,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:46,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-11 02:26:46,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:46,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:46,202 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:46,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [109782955] [2021-10-11 02:26:46,205 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-11 02:26:46,205 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:26:46,205 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:26:46,205 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:26:46,206 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:26:46,463 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:26:46,770 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:26:46,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:26:46,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2021-10-11 02:26:46,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184582811] [2021-10-11 02:26:46,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-10-11 02:26:46,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:46,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-11 02:26:46,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-10-11 02:26:46,772 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 12 states. [2021-10-11 02:26:46,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:46,822 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-10-11 02:26:46,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-11 02:26:46,822 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2021-10-11 02:26:46,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:46,823 INFO L225 Difference]: With dead ends: 29 [2021-10-11 02:26:46,823 INFO L226 Difference]: Without dead ends: 29 [2021-10-11 02:26:46,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-10-11 02:26:46,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-11 02:26:46,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-11 02:26:46,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-11 02:26:46,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-10-11 02:26:46,831 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 18 [2021-10-11 02:26:46,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:46,831 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-10-11 02:26:46,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-10-11 02:26:46,831 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-10-11 02:26:46,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-11 02:26:46,832 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:46,832 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:47,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:47,055 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2021-10-11 02:26:47,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:47,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1688088605, now seen corresponding path program 2 times [2021-10-11 02:26:47,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:47,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490448548] [2021-10-11 02:26:47,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:47,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:26:47,084 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:26:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:26:47,111 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:26:47,133 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:26:47,143 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:26:47,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-10-11 02:26:47,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:26:47 BoogieIcfgContainer [2021-10-11 02:26:47,186 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:26:47,186 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:26:47,186 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:26:47,187 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:26:47,187 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:42" (3/4) ... [2021-10-11 02:26:47,189 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:26:47,251 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b38c03a-b896-408b-8c02-63cc76c1a349/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:26:47,251 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:26:47,252 INFO L168 Benchmark]: Toolchain (without parser) took 5860.28 ms. Allocated memory was 96.5 MB in the beginning and 157.3 MB in the end (delta: 60.8 MB). Free memory was 67.4 MB in the beginning and 112.1 MB in the end (delta: -44.7 MB). Peak memory consumption was 15.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:47,252 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 96.5 MB. Free memory is still 52.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:47,253 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.45 ms. Allocated memory is still 96.5 MB. Free memory was 67.2 MB in the beginning and 72.7 MB in the end (delta: -5.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:47,253 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.81 ms. Allocated memory is still 96.5 MB. Free memory was 72.7 MB in the beginning and 71.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:47,253 INFO L168 Benchmark]: Boogie Preprocessor took 23.80 ms. Allocated memory is still 96.5 MB. Free memory was 71.0 MB in the beginning and 70.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:47,254 INFO L168 Benchmark]: RCFGBuilder took 590.85 ms. Allocated memory was 96.5 MB in the beginning and 130.0 MB in the end (delta: 33.6 MB). Free memory was 70.0 MB in the beginning and 106.6 MB in the end (delta: -36.6 MB). Peak memory consumption was 29.0 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:47,254 INFO L168 Benchmark]: TraceAbstraction took 4824.86 ms. Allocated memory was 130.0 MB in the beginning and 157.3 MB in the end (delta: 27.3 MB). Free memory was 106.2 MB in the beginning and 114.2 MB in the end (delta: -8.1 MB). Peak memory consumption was 18.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:47,255 INFO L168 Benchmark]: Witness Printer took 64.95 ms. Allocated memory is still 157.3 MB. Free memory was 114.2 MB in the beginning and 112.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:47,261 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 96.5 MB. Free memory is still 52.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 310.45 ms. Allocated memory is still 96.5 MB. Free memory was 67.2 MB in the beginning and 72.7 MB in the end (delta: -5.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.81 ms. Allocated memory is still 96.5 MB. Free memory was 72.7 MB in the beginning and 71.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.80 ms. Allocated memory is still 96.5 MB. Free memory was 71.0 MB in the beginning and 70.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 590.85 ms. Allocated memory was 96.5 MB in the beginning and 130.0 MB in the end (delta: 33.6 MB). Free memory was 70.0 MB in the beginning and 106.6 MB in the end (delta: -36.6 MB). Peak memory consumption was 29.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4824.86 ms. Allocated memory was 130.0 MB in the beginning and 157.3 MB in the end (delta: 27.3 MB). Free memory was 106.2 MB in the beginning and 114.2 MB in the end (delta: -8.1 MB). Peak memory consumption was 18.6 MB. Max. memory is 16.1 GB. * Witness Printer took 64.95 ms. Allocated memory is still 157.3 MB. Free memory was 114.2 MB in the beginning and 112.1 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: 16]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L8] char* p = malloc(10 * sizeof(int)); [L10] int i = 0; [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND FALSE !(i < 10) [L14] free(p) [L14] free(p) [L14] free(p) [L16] p[2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.7s, OverallIterations: 10, TraceHistogramMax: 10, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 70 SDtfs, 97 SDslu, 40 SDs, 0 SdLazy, 174 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 151 GetRequests, 96 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred 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, 9 MinimizatonAttempts, 18 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 145 NumberOfCodeBlocks, 133 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 149 ConstructedInterpolants, 0 QuantifiedInterpolants, 6593 SizeOfPredicates, 3 NumberOfNonLiveVariables, 197 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 17 InterpolantComputations, 7 PerfectInterpolantSequences, 93/255 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...