./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-15/cstrcat_reverse_alloca.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-15/cstrcat_reverse_alloca.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW --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 64bit --witnessprinter.graph.data.programhash f7e74a0e03b60f29f7d157510f3d5b3a3ebad4fa8c21c80c2e088ad68134a4dc --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 14:44:32,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:44:32,603 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:44:32,629 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:44:32,630 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:44:32,631 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:44:32,632 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:44:32,634 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:44:32,636 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:44:32,637 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:44:32,638 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:44:32,639 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:44:32,639 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:44:32,640 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:44:32,642 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:44:32,649 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:44:32,650 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:44:32,656 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:44:32,660 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:44:32,668 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:44:32,672 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:44:32,675 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:44:32,678 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:44:32,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:44:32,687 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:44:32,688 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:44:32,688 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:44:32,689 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:44:32,690 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:44:32,691 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:44:32,691 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:44:32,692 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:44:32,693 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:44:32,693 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:44:32,694 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:44:32,695 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:44:32,696 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:44:32,696 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:44:32,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:44:32,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:44:32,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:44:32,699 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2022-11-23 14:44:32,740 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:44:32,741 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:44:32,742 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:44:32,742 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:44:32,743 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:44:32,743 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:44:32,744 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:44:32,744 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:44:32,744 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:44:32,744 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:44:32,746 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:44:32,746 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:44:32,746 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:44:32,746 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:44:32,747 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:44:32,747 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:44:32,747 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:44:32,747 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:44:32,749 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 14:44:32,749 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 14:44:32,749 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:44:32,749 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 14:44:32,750 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:44:32,750 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:44:32,751 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 14:44:32,751 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 14:44:32,751 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 14:44:32,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:44:32,752 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 14:44:32,752 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:44:32,752 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:44:32,753 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:44:32,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:44:32,753 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:44:32,754 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:44:32,754 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:44:32,754 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:44:32,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:44:32,754 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:44:32,755 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7e74a0e03b60f29f7d157510f3d5b3a3ebad4fa8c21c80c2e088ad68134a4dc [2022-11-23 14:44:33,086 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:44:33,117 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:44:33,120 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:44:33,121 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:44:33,122 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:44:33,123 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/termination-15/cstrcat_reverse_alloca.i [2022-11-23 14:44:36,223 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:44:36,494 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:44:36,495 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/sv-benchmarks/c/termination-15/cstrcat_reverse_alloca.i [2022-11-23 14:44:36,505 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/data/65157e9d5/c84bbf24e7fd46d79f1675b3843189d0/FLAG6c3a8eb8e [2022-11-23 14:44:36,519 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/data/65157e9d5/c84bbf24e7fd46d79f1675b3843189d0 [2022-11-23 14:44:36,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:44:36,523 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:44:36,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:44:36,524 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:44:36,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:44:36,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:44:36" (1/1) ... [2022-11-23 14:44:36,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26826e18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:36, skipping insertion in model container [2022-11-23 14:44:36,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:44:36" (1/1) ... [2022-11-23 14:44:36,538 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:44:36,566 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:44:36,875 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:44:36,886 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:44:36,952 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:44:36,990 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:44:36,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:36 WrapperNode [2022-11-23 14:44:36,991 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:44:36,992 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:44:36,992 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:44:36,993 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:44:37,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:36" (1/1) ... [2022-11-23 14:44:37,023 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:36" (1/1) ... [2022-11-23 14:44:37,052 INFO L138 Inliner]: procedures = 152, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 74 [2022-11-23 14:44:37,052 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:44:37,053 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:44:37,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:44:37,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:44:37,063 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:36" (1/1) ... [2022-11-23 14:44:37,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:36" (1/1) ... [2022-11-23 14:44:37,076 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:36" (1/1) ... [2022-11-23 14:44:37,076 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:36" (1/1) ... [2022-11-23 14:44:37,081 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:36" (1/1) ... [2022-11-23 14:44:37,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:36" (1/1) ... [2022-11-23 14:44:37,097 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:36" (1/1) ... [2022-11-23 14:44:37,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:36" (1/1) ... [2022-11-23 14:44:37,107 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:44:37,108 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:44:37,108 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:44:37,109 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:44:37,109 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:36" (1/1) ... [2022-11-23 14:44:37,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:44:37,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:44:37,146 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:44:37,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:44:37,196 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 14:44:37,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:44:37,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:44:37,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:44:37,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:44:37,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:44:37,311 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:44:37,313 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:44:37,543 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:44:37,643 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:44:37,644 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 14:44:37,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:44:37 BoogieIcfgContainer [2022-11-23 14:44:37,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:44:37,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:44:37,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:44:37,666 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:44:37,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:44:36" (1/3) ... [2022-11-23 14:44:37,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6720d572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:44:37, skipping insertion in model container [2022-11-23 14:44:37,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:36" (2/3) ... [2022-11-23 14:44:37,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6720d572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:44:37, skipping insertion in model container [2022-11-23 14:44:37,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:44:37" (3/3) ... [2022-11-23 14:44:37,669 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrcat_reverse_alloca.i [2022-11-23 14:44:37,694 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:44:37,695 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2022-11-23 14:44:37,760 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:44:37,768 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3a0a3871, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:44:37,769 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-11-23 14:44:37,774 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:37,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 14:44:37,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:44:37,782 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 14:44:37,783 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-23 14:44:37,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:44:37,793 INFO L85 PathProgramCache]: Analyzing trace with hash 109376, now seen corresponding path program 1 times [2022-11-23 14:44:37,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:44:37,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218914861] [2022-11-23 14:44:37,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:37,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:44:37,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:38,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:44:38,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:44:38,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218914861] [2022-11-23 14:44:38,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218914861] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:44:38,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:44:38,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:44:38,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149330814] [2022-11-23 14:44:38,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:44:38,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:44:38,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:44:38,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:44:38,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:44:38,150 INFO L87 Difference]: Start difference. First operand has 24 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:38,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:44:38,232 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-11-23 14:44:38,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:44:38,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-23 14:44:38,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:44:38,244 INFO L225 Difference]: With dead ends: 25 [2022-11-23 14:44:38,253 INFO L226 Difference]: Without dead ends: 23 [2022-11-23 14:44:38,255 INFO L412 NwaCegarLoop]: 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 [2022-11-23 14:44:38,258 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:44:38,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 31 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:44:38,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-23 14:44:38,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-23 14:44:38,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 12 states have (on average 2.0) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:38,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-11-23 14:44:38,294 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 3 [2022-11-23 14:44:38,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:44:38,296 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-11-23 14:44:38,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:38,297 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-11-23 14:44:38,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 14:44:38,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:44:38,298 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 14:44:38,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:44:38,299 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-23 14:44:38,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:44:38,300 INFO L85 PathProgramCache]: Analyzing trace with hash 109395, now seen corresponding path program 1 times [2022-11-23 14:44:38,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:44:38,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421725002] [2022-11-23 14:44:38,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:38,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:44:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:38,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:44:38,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:44:38,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421725002] [2022-11-23 14:44:38,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421725002] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:44:38,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:44:38,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:44:38,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364167817] [2022-11-23 14:44:38,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:44:38,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:44:38,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:44:38,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:44:38,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:44:38,572 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:38,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:44:38,628 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-11-23 14:44:38,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:44:38,628 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-23 14:44:38,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:44:38,629 INFO L225 Difference]: With dead ends: 22 [2022-11-23 14:44:38,629 INFO L226 Difference]: Without dead ends: 22 [2022-11-23 14:44:38,630 INFO L412 NwaCegarLoop]: 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 [2022-11-23 14:44:38,631 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:44:38,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 11 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:44:38,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-23 14:44:38,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-23 14:44:38,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:38,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-11-23 14:44:38,635 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 3 [2022-11-23 14:44:38,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:44:38,636 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-11-23 14:44:38,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:38,636 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-11-23 14:44:38,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 14:44:38,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:44:38,637 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 14:44:38,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:44:38,638 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-23 14:44:38,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:44:38,638 INFO L85 PathProgramCache]: Analyzing trace with hash 109396, now seen corresponding path program 1 times [2022-11-23 14:44:38,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:44:38,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813985941] [2022-11-23 14:44:38,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:38,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:44:38,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:38,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:44:38,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:44:38,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813985941] [2022-11-23 14:44:38,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813985941] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:44:38,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:44:38,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:44:38,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838010947] [2022-11-23 14:44:38,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:44:38,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:44:38,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:44:38,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:44:38,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:44:38,985 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:39,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:44:39,028 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2022-11-23 14:44:39,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:44:39,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-23 14:44:39,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:44:39,030 INFO L225 Difference]: With dead ends: 21 [2022-11-23 14:44:39,030 INFO L226 Difference]: Without dead ends: 21 [2022-11-23 14:44:39,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:44:39,032 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:44:39,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 25 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:44:39,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-23 14:44:39,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-23 14:44:39,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:39,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-11-23 14:44:39,036 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 3 [2022-11-23 14:44:39,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:44:39,042 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-11-23 14:44:39,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:39,043 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-11-23 14:44:39,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-23 14:44:39,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:44:39,043 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-23 14:44:39,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:44:39,044 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-23 14:44:39,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:44:39,047 INFO L85 PathProgramCache]: Analyzing trace with hash 3391244, now seen corresponding path program 1 times [2022-11-23 14:44:39,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:44:39,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154534541] [2022-11-23 14:44:39,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:39,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:44:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:39,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:44:39,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:44:39,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154534541] [2022-11-23 14:44:39,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154534541] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:44:39,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:44:39,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:44:39,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287197448] [2022-11-23 14:44:39,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:44:39,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:44:39,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:44:39,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:44:39,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:44:39,155 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:39,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:44:39,178 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-11-23 14:44:39,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:44:39,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-23 14:44:39,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:44:39,179 INFO L225 Difference]: With dead ends: 20 [2022-11-23 14:44:39,180 INFO L226 Difference]: Without dead ends: 20 [2022-11-23 14:44:39,180 INFO L412 NwaCegarLoop]: 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 [2022-11-23 14:44:39,181 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:44:39,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 10 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:44:39,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-23 14:44:39,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-23 14:44:39,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.75) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:39,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-11-23 14:44:39,185 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 4 [2022-11-23 14:44:39,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:44:39,186 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-11-23 14:44:39,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:39,186 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-11-23 14:44:39,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-23 14:44:39,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:44:39,187 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-23 14:44:39,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:44:39,188 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-23 14:44:39,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:44:39,189 INFO L85 PathProgramCache]: Analyzing trace with hash 3391245, now seen corresponding path program 1 times [2022-11-23 14:44:39,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:44:39,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730119291] [2022-11-23 14:44:39,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:39,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:44:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:39,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:44:39,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:44:39,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730119291] [2022-11-23 14:44:39,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730119291] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:44:39,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:44:39,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:44:39,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965945877] [2022-11-23 14:44:39,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:44:39,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:44:39,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:44:39,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:44:39,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:44:39,531 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:39,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:44:39,582 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-11-23 14:44:39,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:44:39,583 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-23 14:44:39,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:44:39,583 INFO L225 Difference]: With dead ends: 19 [2022-11-23 14:44:39,598 INFO L226 Difference]: Without dead ends: 19 [2022-11-23 14:44:39,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:44:39,600 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 19 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:44:39,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 24 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:44:39,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-23 14:44:39,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-23 14:44:39,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:39,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-11-23 14:44:39,604 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 4 [2022-11-23 14:44:39,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:44:39,604 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-11-23 14:44:39,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:39,605 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-11-23 14:44:39,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 14:44:39,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:44:39,606 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 14:44:39,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 14:44:39,606 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-23 14:44:39,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:44:39,607 INFO L85 PathProgramCache]: Analyzing trace with hash 105129997, now seen corresponding path program 1 times [2022-11-23 14:44:39,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:44:39,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781831151] [2022-11-23 14:44:39,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:39,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:44:39,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:39,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:44:39,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:44:39,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781831151] [2022-11-23 14:44:39,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781831151] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:44:39,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:44:39,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:44:39,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976246495] [2022-11-23 14:44:39,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:44:39,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:44:39,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:44:39,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:44:39,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:44:39,658 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:39,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:44:39,682 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2022-11-23 14:44:39,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:44:39,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-23 14:44:39,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:44:39,684 INFO L225 Difference]: With dead ends: 18 [2022-11-23 14:44:39,684 INFO L226 Difference]: Without dead ends: 18 [2022-11-23 14:44:39,684 INFO L412 NwaCegarLoop]: 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 [2022-11-23 14:44:39,685 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:44:39,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 8 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:44:39,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-23 14:44:39,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-23 14:44:39,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:39,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-11-23 14:44:39,689 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 5 [2022-11-23 14:44:39,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:44:39,690 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-11-23 14:44:39,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:39,690 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-11-23 14:44:39,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 14:44:39,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:44:39,691 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 14:44:39,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 14:44:39,692 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-23 14:44:39,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:44:39,692 INFO L85 PathProgramCache]: Analyzing trace with hash 105129998, now seen corresponding path program 1 times [2022-11-23 14:44:39,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:44:39,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660397382] [2022-11-23 14:44:39,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:39,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:44:39,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:40,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:44:40,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:44:40,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660397382] [2022-11-23 14:44:40,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660397382] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:44:40,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:44:40,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:44:40,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500170481] [2022-11-23 14:44:40,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:44:40,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:44:40,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:44:40,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:44:40,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:44:40,079 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:40,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:44:40,184 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-11-23 14:44:40,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:44:40,185 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-23 14:44:40,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:44:40,188 INFO L225 Difference]: With dead ends: 20 [2022-11-23 14:44:40,188 INFO L226 Difference]: Without dead ends: 20 [2022-11-23 14:44:40,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:44:40,192 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:44:40,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 22 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:44:40,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-23 14:44:40,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-11-23 14:44:40,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:40,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-11-23 14:44:40,202 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 5 [2022-11-23 14:44:40,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:44:40,203 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-11-23 14:44:40,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:40,204 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-11-23 14:44:40,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 14:44:40,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:44:40,205 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:44:40,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 14:44:40,205 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-23 14:44:40,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:44:40,206 INFO L85 PathProgramCache]: Analyzing trace with hash -2049287545, now seen corresponding path program 1 times [2022-11-23 14:44:40,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:44:40,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547990995] [2022-11-23 14:44:40,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:40,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:44:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:40,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:44:40,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:44:40,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547990995] [2022-11-23 14:44:40,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547990995] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:44:40,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718258325] [2022-11-23 14:44:40,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:40,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:44:40,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:44:40,507 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:44:40,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:44:40,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:40,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-23 14:44:40,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:44:40,705 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:44:40,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-23 14:44:40,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:44:40,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:44:40,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:44:40,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718258325] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:44:40,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [536653154] [2022-11-23 14:44:40,926 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 14:44:40,926 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:44:40,931 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:44:40,936 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:44:40,937 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:44:41,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:41,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:41,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-23 14:44:41,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-23 14:44:41,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:41,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-23 14:44:41,546 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:44:42,335 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '395#(and (<= 0 |ULTIMATE.start_cstrcat_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcat_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcat_~s1#1.base|) (<= |ULTIMATE.start_cstrcat_#in~s2#1.offset| 2147483645) (<= 0 |ULTIMATE.start_main_#t~malloc213#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483646) (= |ULTIMATE.start_main_#t~malloc214#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc214#1.base|) (<= 0 |ULTIMATE.start_cstrcat_#in~s1#1.base|) (<= |ULTIMATE.start_cstrcat_~s~0#1.offset| 2147483646) (= |ULTIMATE.start_main_#t~malloc213#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcat_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcat_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrcat_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcat_~s1#1.offset| 2147483646) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (or (not (<= (+ |ULTIMATE.start_cstrcat_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcat_~s~0#1.base|))) (not (<= 0 |ULTIMATE.start_cstrcat_~s~0#1.offset|))) (<= |ULTIMATE.start_cstrcat_~s2#1.offset| 2147483645) (<= 1 |ULTIMATE.start_cstrcat_~s1#1.offset|) (<= |ULTIMATE.start_cstrcat_#in~s1#1.offset| 2147483646) (<= |ULTIMATE.start_main_~length3~0#1| 2147483646) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcat_#in~s2#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 2147483646) (<= 2 |ULTIMATE.start_main_~length2~0#1|) (<= 1 |ULTIMATE.start_main_~length3~0#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 2147483645) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-23 14:44:42,335 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:44:42,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:44:42,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-11-23 14:44:42,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934148147] [2022-11-23 14:44:42,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:44:42,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 14:44:42,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:44:42,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 14:44:42,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-11-23 14:44:42,337 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:42,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:44:42,608 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2022-11-23 14:44:42,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:44:42,609 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 14:44:42,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:44:42,609 INFO L225 Difference]: With dead ends: 35 [2022-11-23 14:44:42,609 INFO L226 Difference]: Without dead ends: 35 [2022-11-23 14:44:42,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2022-11-23 14:44:42,611 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 160 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:44:42,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 44 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:44:42,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-23 14:44:42,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 21. [2022-11-23 14:44:42,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:42,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-11-23 14:44:42,613 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 7 [2022-11-23 14:44:42,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:44:42,613 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-11-23 14:44:42,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:42,614 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-11-23 14:44:42,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 14:44:42,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:44:42,614 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:44:42,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:44:42,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:44:42,823 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-23 14:44:42,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:44:42,824 INFO L85 PathProgramCache]: Analyzing trace with hash 896594048, now seen corresponding path program 1 times [2022-11-23 14:44:42,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:44:42,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367719611] [2022-11-23 14:44:42,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:42,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:44:42,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:42,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:44:42,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:44:42,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367719611] [2022-11-23 14:44:42,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367719611] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:44:42,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:44:42,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:44:42,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344729782] [2022-11-23 14:44:42,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:44:42,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:44:42,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:44:42,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:44:42,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:44:42,890 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:42,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:44:42,941 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2022-11-23 14:44:42,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:44:42,942 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 14:44:42,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:44:42,943 INFO L225 Difference]: With dead ends: 20 [2022-11-23 14:44:42,943 INFO L226 Difference]: Without dead ends: 20 [2022-11-23 14:44:42,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:44:42,944 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:44:42,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 11 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:44:42,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-23 14:44:42,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-23 14:44:42,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:42,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-11-23 14:44:42,947 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 8 [2022-11-23 14:44:42,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:44:42,947 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-11-23 14:44:42,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:42,948 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-11-23 14:44:42,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 14:44:42,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:44:42,948 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:44:42,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 14:44:42,949 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-23 14:44:42,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:44:42,949 INFO L85 PathProgramCache]: Analyzing trace with hash 896594049, now seen corresponding path program 1 times [2022-11-23 14:44:42,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:44:42,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854690250] [2022-11-23 14:44:42,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:42,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:44:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:43,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:44:43,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:44:43,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854690250] [2022-11-23 14:44:43,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854690250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:44:43,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:44:43,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:44:43,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265565544] [2022-11-23 14:44:43,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:44:43,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:44:43,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:44:43,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:44:43,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:44:43,296 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:43,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:44:43,376 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-11-23 14:44:43,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:44:43,377 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 14:44:43,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:44:43,377 INFO L225 Difference]: With dead ends: 22 [2022-11-23 14:44:43,377 INFO L226 Difference]: Without dead ends: 22 [2022-11-23 14:44:43,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:44:43,378 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 25 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:44:43,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 20 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:44:43,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-23 14:44:43,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-23 14:44:43,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.411764705882353) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:43,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-11-23 14:44:43,381 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 8 [2022-11-23 14:44:43,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:44:43,382 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-11-23 14:44:43,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:43,382 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-11-23 14:44:43,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 14:44:43,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:44:43,383 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:44:43,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 14:44:43,383 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-23 14:44:43,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:44:43,384 INFO L85 PathProgramCache]: Analyzing trace with hash 2024611737, now seen corresponding path program 1 times [2022-11-23 14:44:43,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:44:43,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459635500] [2022-11-23 14:44:43,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:43,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:44:43,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:43,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:44:43,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:44:43,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459635500] [2022-11-23 14:44:43,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459635500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:44:43,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:44:43,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:44:43,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128993806] [2022-11-23 14:44:43,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:44:43,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:44:43,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:44:43,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:44:43,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:44:43,481 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:43,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:44:43,519 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2022-11-23 14:44:43,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:44:43,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 14:44:43,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:44:43,522 INFO L225 Difference]: With dead ends: 21 [2022-11-23 14:44:43,522 INFO L226 Difference]: Without dead ends: 21 [2022-11-23 14:44:43,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:44:43,523 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 10 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:44:43,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 8 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:44:43,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-23 14:44:43,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-23 14:44:43,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:43,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-11-23 14:44:43,531 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 9 [2022-11-23 14:44:43,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:44:43,531 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-11-23 14:44:43,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:43,531 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-11-23 14:44:43,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 14:44:43,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:44:43,532 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:44:43,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 14:44:43,532 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-23 14:44:43,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:44:43,533 INFO L85 PathProgramCache]: Analyzing trace with hash 2024611738, now seen corresponding path program 1 times [2022-11-23 14:44:43,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:44:43,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863419934] [2022-11-23 14:44:43,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:43,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:44:43,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:43,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:44:43,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:44:43,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863419934] [2022-11-23 14:44:43,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863419934] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:44:43,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:44:43,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:44:43,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715514642] [2022-11-23 14:44:43,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:44:43,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:44:43,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:44:43,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:44:43,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:44:43,891 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:44,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:44:44,030 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2022-11-23 14:44:44,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:44:44,031 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 14:44:44,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:44:44,031 INFO L225 Difference]: With dead ends: 31 [2022-11-23 14:44:44,031 INFO L226 Difference]: Without dead ends: 31 [2022-11-23 14:44:44,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:44:44,032 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 47 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:44:44,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 22 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:44:44,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-23 14:44:44,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2022-11-23 14:44:44,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:44,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-11-23 14:44:44,035 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 9 [2022-11-23 14:44:44,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:44:44,036 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-11-23 14:44:44,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:44,036 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-11-23 14:44:44,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 14:44:44,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:44:44,037 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2022-11-23 14:44:44,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 14:44:44,037 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-23 14:44:44,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:44:44,038 INFO L85 PathProgramCache]: Analyzing trace with hash 2024657600, now seen corresponding path program 2 times [2022-11-23 14:44:44,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:44:44,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681687605] [2022-11-23 14:44:44,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:44,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:44:44,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:44,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:44:44,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:44:44,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681687605] [2022-11-23 14:44:44,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681687605] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:44:44,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18173428] [2022-11-23 14:44:44,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:44:44,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:44:44,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:44:44,491 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:44:44,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:44:44,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 14:44:44,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:44:44,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-23 14:44:44,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:44:44,639 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:44:44,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-23 14:44:44,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2022-11-23 14:44:44,760 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:44:44,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 15 [2022-11-23 14:44:44,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:44:44,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:44:44,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-23 14:44:44,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 12 [2022-11-23 14:44:45,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:44:45,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18173428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:44:45,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [670734148] [2022-11-23 14:44:45,032 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 14:44:45,032 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:44:45,033 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:44:45,033 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:44:45,033 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:44:45,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:45,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:45,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-23 14:44:45,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-23 14:44:45,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:45,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-23 14:44:45,458 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:44:46,299 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '764#(and (<= 0 |ULTIMATE.start_cstrcat_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcat_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcat_~s1#1.base|) (<= |ULTIMATE.start_cstrcat_#in~s2#1.offset| 2147483645) (<= 0 |ULTIMATE.start_main_#t~malloc213#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483646) (= |ULTIMATE.start_main_#t~malloc214#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc214#1.base|) (<= 0 |ULTIMATE.start_cstrcat_#in~s1#1.base|) (<= |ULTIMATE.start_cstrcat_~s~0#1.offset| 2147483646) (= |ULTIMATE.start_main_#t~malloc213#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcat_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcat_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrcat_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcat_~s1#1.offset| 2147483646) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (or (not (<= (+ |ULTIMATE.start_cstrcat_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcat_~s~0#1.base|))) (not (<= 0 |ULTIMATE.start_cstrcat_~s~0#1.offset|))) (<= |ULTIMATE.start_cstrcat_~s2#1.offset| 2147483645) (<= 1 |ULTIMATE.start_cstrcat_~s1#1.offset|) (<= |ULTIMATE.start_cstrcat_#in~s1#1.offset| 2147483646) (<= |ULTIMATE.start_main_~length3~0#1| 2147483646) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcat_#in~s2#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 2147483646) (<= 2 |ULTIMATE.start_main_~length2~0#1|) (<= 1 |ULTIMATE.start_main_~length3~0#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 2147483645) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-23 14:44:46,299 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:44:46,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:44:46,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2022-11-23 14:44:46,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689666922] [2022-11-23 14:44:46,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:44:46,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-23 14:44:46,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:44:46,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-23 14:44:46,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-11-23 14:44:46,301 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:46,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:44:46,745 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2022-11-23 14:44:46,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 14:44:46,746 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 14:44:46,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:44:46,746 INFO L225 Difference]: With dead ends: 46 [2022-11-23 14:44:46,747 INFO L226 Difference]: Without dead ends: 46 [2022-11-23 14:44:46,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2022-11-23 14:44:46,748 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 129 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:44:46,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 68 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:44:46,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-23 14:44:46,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 29. [2022-11-23 14:44:46,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.36) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:46,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-11-23 14:44:46,750 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 9 [2022-11-23 14:44:46,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:44:46,751 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-11-23 14:44:46,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:46,751 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-11-23 14:44:46,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 14:44:46,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:44:46,751 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:44:46,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:44:46,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 14:44:46,960 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-23 14:44:46,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:44:46,960 INFO L85 PathProgramCache]: Analyzing trace with hash 75722131, now seen corresponding path program 1 times [2022-11-23 14:44:46,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:44:46,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684479867] [2022-11-23 14:44:46,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:46,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:44:46,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:47,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:44:47,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:44:47,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684479867] [2022-11-23 14:44:47,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684479867] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:44:47,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:44:47,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:44:47,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655802408] [2022-11-23 14:44:47,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:44:47,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:44:47,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:44:47,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:44:47,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:44:47,160 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:47,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:44:47,269 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2022-11-23 14:44:47,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:44:47,270 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 14:44:47,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:44:47,270 INFO L225 Difference]: With dead ends: 31 [2022-11-23 14:44:47,270 INFO L226 Difference]: Without dead ends: 31 [2022-11-23 14:44:47,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:44:47,271 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 35 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:44:47,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 18 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:44:47,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-23 14:44:47,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-11-23 14:44:47,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:47,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-11-23 14:44:47,274 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 11 [2022-11-23 14:44:47,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:44:47,274 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-11-23 14:44:47,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:47,275 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-11-23 14:44:47,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 14:44:47,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:44:47,276 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2022-11-23 14:44:47,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 14:44:47,276 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-23 14:44:47,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:44:47,277 INFO L85 PathProgramCache]: Analyzing trace with hash 75767993, now seen corresponding path program 3 times [2022-11-23 14:44:47,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:44:47,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983408885] [2022-11-23 14:44:47,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:47,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:44:47,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:44:48,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:44:48,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983408885] [2022-11-23 14:44:48,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983408885] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:44:48,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548337487] [2022-11-23 14:44:48,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:44:48,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:44:48,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:44:48,071 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:44:48,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:44:48,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:44:48,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:44:48,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-23 14:44:48,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:44:48,202 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:44:48,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-23 14:44:48,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2022-11-23 14:44:50,664 INFO L321 Elim1Store]: treesize reduction 4, result has 84.6 percent of original size [2022-11-23 14:44:50,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2022-11-23 14:44:50,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:44:50,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:44:51,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-11-23 14:44:51,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-11-23 14:44:51,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:44:51,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548337487] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:44:51,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [101113251] [2022-11-23 14:44:51,267 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 14:44:51,267 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:44:51,267 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:44:51,267 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:44:51,267 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:44:51,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:51,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:51,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-23 14:44:51,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-23 14:44:51,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:51,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-23 14:44:51,633 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:44:52,562 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1021#(and (<= 0 |ULTIMATE.start_cstrcat_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcat_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcat_~s1#1.base|) (<= |ULTIMATE.start_cstrcat_#in~s2#1.offset| 2147483645) (<= 0 |ULTIMATE.start_main_#t~malloc213#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483646) (= |ULTIMATE.start_main_#t~malloc214#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc214#1.base|) (<= 0 |ULTIMATE.start_cstrcat_#in~s1#1.base|) (<= |ULTIMATE.start_cstrcat_~s~0#1.offset| 2147483646) (= |ULTIMATE.start_main_#t~malloc213#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcat_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcat_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrcat_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcat_~s1#1.offset| 2147483646) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (or (not (<= (+ |ULTIMATE.start_cstrcat_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcat_~s~0#1.base|))) (not (<= 0 |ULTIMATE.start_cstrcat_~s~0#1.offset|))) (<= |ULTIMATE.start_cstrcat_~s2#1.offset| 2147483645) (<= 1 |ULTIMATE.start_cstrcat_~s1#1.offset|) (<= |ULTIMATE.start_cstrcat_#in~s1#1.offset| 2147483646) (<= |ULTIMATE.start_main_~length3~0#1| 2147483646) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcat_#in~s2#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 2147483646) (<= 2 |ULTIMATE.start_main_~length2~0#1|) (<= 1 |ULTIMATE.start_main_~length3~0#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 2147483645) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-23 14:44:52,562 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:44:52,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:44:52,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2022-11-23 14:44:52,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168937937] [2022-11-23 14:44:52,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:44:52,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 14:44:52,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:44:52,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 14:44:52,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=761, Unknown=1, NotChecked=0, Total=870 [2022-11-23 14:44:52,564 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:57,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:45:02,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:45:04,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:04,936 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2022-11-23 14:45:04,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 14:45:04,936 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 14:45:04,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:04,937 INFO L225 Difference]: With dead ends: 47 [2022-11-23 14:45:04,937 INFO L226 Difference]: Without dead ends: 47 [2022-11-23 14:45:04,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=355, Invalid=1450, Unknown=1, NotChecked=0, Total=1806 [2022-11-23 14:45:04,940 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 114 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 9 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:04,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 85 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 286 Invalid, 4 Unknown, 0 Unchecked, 5.0s Time] [2022-11-23 14:45:04,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-23 14:45:04,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2022-11-23 14:45:04,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:04,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-11-23 14:45:04,943 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 11 [2022-11-23 14:45:04,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:04,946 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-11-23 14:45:04,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:04,947 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-11-23 14:45:04,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 14:45:04,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:04,948 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:45:04,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:45:05,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 14:45:05,154 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-23 14:45:05,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:05,154 INFO L85 PathProgramCache]: Analyzing trace with hash 982549441, now seen corresponding path program 1 times [2022-11-23 14:45:05,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:05,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507223745] [2022-11-23 14:45:05,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:05,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:05,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:05,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:05,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:05,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507223745] [2022-11-23 14:45:05,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507223745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:45:05,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:45:05,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:45:05,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231116537] [2022-11-23 14:45:05,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:45:05,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:45:05,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:05,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:45:05,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:45:05,287 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:05,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:05,307 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2022-11-23 14:45:05,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:45:05,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-23 14:45:05,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:05,308 INFO L225 Difference]: With dead ends: 25 [2022-11-23 14:45:05,308 INFO L226 Difference]: Without dead ends: 23 [2022-11-23 14:45:05,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:45:05,309 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:05,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 14 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:45:05,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-23 14:45:05,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-23 14:45:05,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:05,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-11-23 14:45:05,317 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 12 [2022-11-23 14:45:05,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:05,317 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-11-23 14:45:05,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:05,317 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-11-23 14:45:05,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 14:45:05,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:05,319 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:45:05,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-23 14:45:05,319 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-23 14:45:05,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:05,320 INFO L85 PathProgramCache]: Analyzing trace with hash 982550665, now seen corresponding path program 1 times [2022-11-23 14:45:05,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:05,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639723975] [2022-11-23 14:45:05,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:05,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:05,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:05,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:05,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639723975] [2022-11-23 14:45:05,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639723975] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:45:05,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529581963] [2022-11-23 14:45:05,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:05,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:45:05,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:45:05,656 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:45:05,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:45:05,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:05,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-23 14:45:05,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:45:05,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-23 14:45:05,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:45:05,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 14:45:05,852 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:45:05,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-11-23 14:45:05,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:05,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:45:06,045 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:45:06,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-11-23 14:45:06,120 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_190 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_190) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) 0) 0)) is different from false [2022-11-23 14:45:06,129 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:45:06,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-23 14:45:06,138 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:45:06,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-11-23 14:45:06,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:06,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529581963] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:45:06,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [76746122] [2022-11-23 14:45:06,156 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-23 14:45:06,157 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:45:06,157 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:45:06,157 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:45:06,157 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:45:06,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:06,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:06,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-23 14:45:06,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-23 14:45:06,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:06,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-23 14:45:06,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:06,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:06,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:45:06,532 INFO L321 Elim1Store]: treesize reduction 46, result has 30.3 percent of original size [2022-11-23 14:45:06,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 59 [2022-11-23 14:45:06,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-23 14:45:07,016 INFO L321 Elim1Store]: treesize reduction 32, result has 57.3 percent of original size [2022-11-23 14:45:07,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 145 [2022-11-23 14:45:07,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-23 14:45:07,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-23 14:45:08,051 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:45:10,261 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1263#(and (<= 0 |ULTIMATE.start_cstrcat_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrcat_~s2#1.offset| 2147483644) (<= 0 |ULTIMATE.start_cstrcat_~s2#1.base|) (<= 0 (+ 2 |ULTIMATE.start_cstrcat_~s2#1.offset|)) (<= |ULTIMATE.start_cstrcat_#t~post207#1.offset| 2147483646) (<= 0 |ULTIMATE.start_cstrcat_~s1#1.base|) (<= |ULTIMATE.start_cstrcat_#in~s2#1.offset| 2147483645) (<= 0 |ULTIMATE.start_main_#t~malloc213#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483646) (= |ULTIMATE.start_main_#t~malloc214#1.offset| 0) (or (not (<= (+ |ULTIMATE.start_cstrcat_#t~post208#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcat_#t~post208#1.base|))) (not (<= 0 |ULTIMATE.start_cstrcat_#t~post208#1.offset|))) (<= 0 |ULTIMATE.start_main_#t~malloc214#1.base|) (<= 0 |ULTIMATE.start_cstrcat_#in~s1#1.base|) (<= 0 (+ |ULTIMATE.start_cstrcat_#t~post208#1.offset| 1)) (<= |ULTIMATE.start_cstrcat_#t~post208#1.offset| 2147483645) (= |ULTIMATE.start_main_#t~malloc213#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcat_~s~0#1.base|) (<= 1 |ULTIMATE.start_cstrcat_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcat_~s1#1.offset| 2147483646) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrcat_#t~post207#1.base|) (<= 0 |ULTIMATE.start_cstrcat_#t~post208#1.base|) (<= 1 |ULTIMATE.start_cstrcat_~s1#1.offset|) (<= |ULTIMATE.start_cstrcat_#in~s1#1.offset| 2147483646) (<= |ULTIMATE.start_cstrcat_~s~0#1.offset| 2147483645) (<= |ULTIMATE.start_main_~length3~0#1| 2147483646) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcat_#in~s2#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 2147483646) (<= 2 |ULTIMATE.start_main_~length2~0#1|) (<= 1 |ULTIMATE.start_main_~length3~0#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 2147483645) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-23 14:45:10,262 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:45:10,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:45:10,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-11-23 14:45:10,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259210452] [2022-11-23 14:45:10,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:45:10,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 14:45:10,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:10,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 14:45:10,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=565, Unknown=1, NotChecked=48, Total=702 [2022-11-23 14:45:10,264 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:10,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:10,474 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2022-11-23 14:45:10,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 14:45:10,475 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-23 14:45:10,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:10,476 INFO L225 Difference]: With dead ends: 35 [2022-11-23 14:45:10,476 INFO L226 Difference]: Without dead ends: 35 [2022-11-23 14:45:10,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=108, Invalid=651, Unknown=1, NotChecked=52, Total=812 [2022-11-23 14:45:10,477 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:10,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 30 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 99 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2022-11-23 14:45:10,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-23 14:45:10,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2022-11-23 14:45:10,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:10,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-11-23 14:45:10,480 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 12 [2022-11-23 14:45:10,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:10,480 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-11-23 14:45:10,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:10,481 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-11-23 14:45:10,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-23 14:45:10,481 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:10,482 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:45:10,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:45:10,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:45:10,687 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-23 14:45:10,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:10,688 INFO L85 PathProgramCache]: Analyzing trace with hash 320680459, now seen corresponding path program 1 times [2022-11-23 14:45:10,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:10,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928018297] [2022-11-23 14:45:10,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:10,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:10,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:11,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:11,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928018297] [2022-11-23 14:45:11,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928018297] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:45:11,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606772289] [2022-11-23 14:45:11,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:11,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:45:11,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:45:11,142 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:45:11,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:45:11,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:11,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-23 14:45:11,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:45:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:11,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:45:11,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-23 14:45:11,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:11,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606772289] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:45:11,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [401760337] [2022-11-23 14:45:11,685 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-23 14:45:11,685 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:45:11,685 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:45:11,686 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:45:11,686 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:45:11,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:11,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:11,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-23 14:45:11,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-23 14:45:11,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:11,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-23 14:45:12,003 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 14:45:12,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-23 14:45:12,088 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 14:45:12,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-23 14:45:12,202 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:45:15,352 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1450#(and (<= 0 |ULTIMATE.start_cstrcat_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcat_#t~post208#1.offset|) (<= |ULTIMATE.start_cstrcat_#t~post207#1.offset| 2147483646) (<= 0 |ULTIMATE.start_cstrcat_~s1#1.base|) (<= |ULTIMATE.start_cstrcat_#in~s2#1.offset| 2147483645) (<= 0 |ULTIMATE.start_main_#t~malloc213#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483646) (= |ULTIMATE.start_main_#t~malloc214#1.offset| 0) (= |ULTIMATE.start_cstrcat_#t~post208#1.base| |ULTIMATE.start_cstrcat_~s2#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc214#1.base|) (<= 0 |ULTIMATE.start_cstrcat_#in~s1#1.base|) (<= |ULTIMATE.start_cstrcat_#t~post208#1.offset| 2147483645) (= |ULTIMATE.start_main_#t~malloc213#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (or (not (<= (+ |ULTIMATE.start_cstrcat_#t~post207#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcat_#t~post207#1.base|))) (not (<= 0 |ULTIMATE.start_cstrcat_#t~post207#1.offset|))) (<= 1 |ULTIMATE.start_cstrcat_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcat_~s1#1.offset| 2147483646) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrcat_#t~post207#1.base|) (= |ULTIMATE.start_cstrcat_#t~post207#1.offset| (+ |ULTIMATE.start_cstrcat_~s~0#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcat_#t~post208#1.base|) (<= 1 |ULTIMATE.start_cstrcat_~s1#1.offset|) (<= |ULTIMATE.start_cstrcat_#in~s1#1.offset| 2147483646) (<= |ULTIMATE.start_main_~length3~0#1| 2147483646) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcat_#in~s2#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 2147483646) (= (select |#valid| |ULTIMATE.start_cstrcat_#t~post208#1.base|) 1) (<= (+ |ULTIMATE.start_cstrcat_#t~post208#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcat_#t~post208#1.base|)) (<= 2 |ULTIMATE.start_main_~length2~0#1|) (= |ULTIMATE.start_cstrcat_#t~post208#1.offset| (+ |ULTIMATE.start_cstrcat_~s2#1.offset| 1)) (= |ULTIMATE.start_cstrcat_#t~post207#1.base| |ULTIMATE.start_cstrcat_~s~0#1.base|) (<= 1 |ULTIMATE.start_main_~length3~0#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |ULTIMATE.start_cstrcat_#t~mem209#1| (select (select |#memory_int| |ULTIMATE.start_cstrcat_#t~post208#1.base|) |ULTIMATE.start_cstrcat_#t~post208#1.offset|)) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 2147483645) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-23 14:45:15,353 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:45:15,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:45:15,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2022-11-23 14:45:15,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891085421] [2022-11-23 14:45:15,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:45:15,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-23 14:45:15,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:15,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-23 14:45:15,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2022-11-23 14:45:15,355 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:16,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:16,396 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2022-11-23 14:45:16,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 14:45:16,397 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-23 14:45:16,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:16,397 INFO L225 Difference]: With dead ends: 46 [2022-11-23 14:45:16,398 INFO L226 Difference]: Without dead ends: 46 [2022-11-23 14:45:16,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=531, Invalid=2225, Unknown=0, NotChecked=0, Total=2756 [2022-11-23 14:45:16,400 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 137 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:16,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 47 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:45:16,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-23 14:45:16,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 32. [2022-11-23 14:45:16,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:16,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-11-23 14:45:16,403 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 15 [2022-11-23 14:45:16,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:16,403 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-11-23 14:45:16,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:16,404 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-11-23 14:45:16,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-23 14:45:16,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:16,404 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:45:16,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:45:16,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 14:45:16,627 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-23 14:45:16,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:16,628 INFO L85 PathProgramCache]: Analyzing trace with hash -158016367, now seen corresponding path program 2 times [2022-11-23 14:45:16,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:16,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261858051] [2022-11-23 14:45:16,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:16,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:17,040 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:17,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:17,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261858051] [2022-11-23 14:45:17,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261858051] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:45:17,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538303059] [2022-11-23 14:45:17,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:45:17,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:45:17,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:45:17,043 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:45:17,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:45:17,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 14:45:17,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:45:17,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-23 14:45:17,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:45:17,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-23 14:45:17,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:45:17,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 14:45:17,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 14:45:17,302 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:45:17,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-11-23 14:45:17,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:17,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:45:17,534 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:45:17,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-11-23 14:45:17,635 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_244 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post207#1.base| v_ArrVal_244) |c_ULTIMATE.start_cstrcat_~s2#1.base|) 0))) is different from false [2022-11-23 14:45:17,645 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_244 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_244) |c_ULTIMATE.start_cstrcat_~s2#1.base|) 0) 0)) is different from false [2022-11-23 14:45:17,656 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_244 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_244) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) 0) 0)) is different from false [2022-11-23 14:45:17,662 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:45:17,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-23 14:45:17,670 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:45:17,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-11-23 14:45:17,681 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-23 14:45:17,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538303059] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:45:17,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [599108393] [2022-11-23 14:45:17,684 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-23 14:45:17,684 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:45:17,684 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:45:17,684 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:45:17,684 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:45:17,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:17,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:17,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-23 14:45:17,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-23 14:45:17,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:17,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-23 14:45:17,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:45:17,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:17,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:17,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:45:18,011 INFO L321 Elim1Store]: treesize reduction 46, result has 30.3 percent of original size [2022-11-23 14:45:18,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 59 [2022-11-23 14:45:18,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-23 14:45:18,439 INFO L321 Elim1Store]: treesize reduction 32, result has 57.3 percent of original size [2022-11-23 14:45:18,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 145 [2022-11-23 14:45:19,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-23 14:45:19,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-23 14:45:19,594 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:45:21,972 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1695#(and (<= 0 |ULTIMATE.start_cstrcat_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrcat_~s2#1.offset| 2147483644) (<= 0 |ULTIMATE.start_cstrcat_~s2#1.base|) (<= 0 (+ 2 |ULTIMATE.start_cstrcat_~s2#1.offset|)) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_cstrcat_#t~post207#1.offset| 2147483646) (<= 0 |ULTIMATE.start_cstrcat_~s1#1.base|) (<= |ULTIMATE.start_cstrcat_#in~s2#1.offset| 2147483645) (<= 0 |ULTIMATE.start_main_#t~malloc213#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483646) (<= |ULTIMATE.start_main_#t~malloc214#1.offset| 0) (or (not (<= (+ |ULTIMATE.start_cstrcat_#t~post208#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcat_#t~post208#1.base|))) (not (<= 0 |ULTIMATE.start_cstrcat_#t~post208#1.offset|))) (<= 0 |ULTIMATE.start_main_#t~malloc214#1.base|) (<= 0 |ULTIMATE.start_cstrcat_#in~s1#1.base|) (<= 0 (+ |ULTIMATE.start_cstrcat_#t~post208#1.offset| 1)) (<= |ULTIMATE.start_cstrcat_#t~post208#1.offset| 2147483645) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcat_~s~0#1.base|) (<= 1 |ULTIMATE.start_cstrcat_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcat_~s1#1.offset| 2147483646) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrcat_#t~post207#1.base|) (<= 0 |ULTIMATE.start_cstrcat_#t~post208#1.base|) (<= 1 |ULTIMATE.start_cstrcat_~s1#1.offset|) (<= |ULTIMATE.start_main_#t~malloc213#1.offset| 0) (<= |ULTIMATE.start_cstrcat_#in~s1#1.offset| 2147483646) (<= |#NULL.base| 0) (<= |ULTIMATE.start_cstrcat_~s~0#1.offset| 2147483645) (<= |ULTIMATE.start_main_~length3~0#1| 2147483646) (<= 0 |ULTIMATE.start_main_#t~malloc214#1.offset|) (<= 0 |ULTIMATE.start_cstrcat_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc213#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 2147483646) (<= 0 |#NULL.offset|) (<= 2 |ULTIMATE.start_main_~length2~0#1|) (<= 1 |ULTIMATE.start_main_~length3~0#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 2147483645) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|))' at error location [2022-11-23 14:45:21,972 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:45:21,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:45:21,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-11-23 14:45:21,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978862831] [2022-11-23 14:45:21,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:45:21,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-23 14:45:21,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:21,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-23 14:45:21,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=946, Unknown=3, NotChecked=192, Total=1260 [2022-11-23 14:45:21,977 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 26 states, 25 states have (on average 1.64) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:24,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 14:45:25,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:25,567 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2022-11-23 14:45:25,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-23 14:45:25,567 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.64) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-23 14:45:25,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:25,568 INFO L225 Difference]: With dead ends: 53 [2022-11-23 14:45:25,568 INFO L226 Difference]: Without dead ends: 41 [2022-11-23 14:45:25,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=356, Invalid=2202, Unknown=4, NotChecked=300, Total=2862 [2022-11-23 14:45:25,570 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 35 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 25 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:25,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 47 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 329 Invalid, 13 Unknown, 82 Unchecked, 2.4s Time] [2022-11-23 14:45:25,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-23 14:45:25,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2022-11-23 14:45:25,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:25,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-11-23 14:45:25,575 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 16 [2022-11-23 14:45:25,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:25,575 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-11-23 14:45:25,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.64) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:25,576 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-11-23 14:45:25,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 14:45:25,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:25,576 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:45:25,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-23 14:45:25,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:45:25,782 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-23 14:45:25,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:25,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1707777724, now seen corresponding path program 2 times [2022-11-23 14:45:25,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:25,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853090272] [2022-11-23 14:45:25,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:25,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:25,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:26,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:26,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:26,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853090272] [2022-11-23 14:45:26,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853090272] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:45:26,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343785212] [2022-11-23 14:45:26,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:45:26,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:45:26,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:45:26,648 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:45:26,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:45:26,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 14:45:26,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:45:26,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-23 14:45:26,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:45:26,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2022-11-23 14:45:27,021 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:45:27,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-11-23 14:45:27,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:27,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:45:27,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-23 14:45:27,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-23 14:45:27,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-23 14:45:27,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:27,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343785212] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:45:27,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [83740189] [2022-11-23 14:45:27,872 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-23 14:45:27,872 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:45:27,872 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:45:27,873 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:45:27,873 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:45:27,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:27,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:27,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-23 14:45:27,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-23 14:45:28,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:28,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-23 14:45:28,183 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 14:45:28,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-23 14:45:28,259 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 14:45:28,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-23 14:45:28,387 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:45:31,770 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1955#(and (<= 0 |ULTIMATE.start_cstrcat_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcat_#t~post208#1.offset|) (<= |ULTIMATE.start_cstrcat_#t~post207#1.offset| 2147483646) (<= 0 |ULTIMATE.start_cstrcat_~s1#1.base|) (<= |ULTIMATE.start_cstrcat_#in~s2#1.offset| 2147483645) (<= 0 |ULTIMATE.start_main_#t~malloc213#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483646) (= |ULTIMATE.start_main_#t~malloc214#1.offset| 0) (= |ULTIMATE.start_cstrcat_#t~post208#1.base| |ULTIMATE.start_cstrcat_~s2#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc214#1.base|) (<= 0 |ULTIMATE.start_cstrcat_#in~s1#1.base|) (<= |ULTIMATE.start_cstrcat_#t~post208#1.offset| 2147483645) (= |ULTIMATE.start_main_#t~malloc213#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (or (not (<= (+ |ULTIMATE.start_cstrcat_#t~post207#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcat_#t~post207#1.base|))) (not (<= 0 |ULTIMATE.start_cstrcat_#t~post207#1.offset|))) (<= 1 |ULTIMATE.start_cstrcat_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcat_~s1#1.offset| 2147483646) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrcat_#t~post207#1.base|) (= |ULTIMATE.start_cstrcat_#t~post207#1.offset| (+ |ULTIMATE.start_cstrcat_~s~0#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcat_#t~post208#1.base|) (<= 1 |ULTIMATE.start_cstrcat_~s1#1.offset|) (<= |ULTIMATE.start_cstrcat_#in~s1#1.offset| 2147483646) (<= |ULTIMATE.start_main_~length3~0#1| 2147483646) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcat_#in~s2#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 2147483646) (= (select |#valid| |ULTIMATE.start_cstrcat_#t~post208#1.base|) 1) (<= (+ |ULTIMATE.start_cstrcat_#t~post208#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcat_#t~post208#1.base|)) (<= 2 |ULTIMATE.start_main_~length2~0#1|) (= |ULTIMATE.start_cstrcat_#t~post208#1.offset| (+ |ULTIMATE.start_cstrcat_~s2#1.offset| 1)) (= |ULTIMATE.start_cstrcat_#t~post207#1.base| |ULTIMATE.start_cstrcat_~s~0#1.base|) (<= 1 |ULTIMATE.start_main_~length3~0#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |ULTIMATE.start_cstrcat_#t~mem209#1| (select (select |#memory_int| |ULTIMATE.start_cstrcat_#t~post208#1.base|) |ULTIMATE.start_cstrcat_#t~post208#1.offset|)) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 2147483645) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-23 14:45:31,770 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:45:31,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:45:31,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 29 [2022-11-23 14:45:31,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096268517] [2022-11-23 14:45:31,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:45:31,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-23 14:45:31,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:31,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-23 14:45:31,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1407, Unknown=0, NotChecked=0, Total=1560 [2022-11-23 14:45:31,772 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:34,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:34,569 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2022-11-23 14:45:34,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-23 14:45:34,569 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-23 14:45:34,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:34,570 INFO L225 Difference]: With dead ends: 45 [2022-11-23 14:45:34,570 INFO L226 Difference]: Without dead ends: 37 [2022-11-23 14:45:34,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=671, Invalid=3489, Unknown=0, NotChecked=0, Total=4160 [2022-11-23 14:45:34,572 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 164 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:34,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 82 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:45:34,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-23 14:45:34,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-11-23 14:45:34,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:34,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-11-23 14:45:34,575 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 17 [2022-11-23 14:45:34,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:34,575 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-11-23 14:45:34,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:34,575 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-11-23 14:45:34,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-23 14:45:34,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:34,576 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:45:34,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:45:34,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-11-23 14:45:34,779 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-23 14:45:34,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:34,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1140939203, now seen corresponding path program 3 times [2022-11-23 14:45:34,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:34,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946378512] [2022-11-23 14:45:34,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:34,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:34,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:35,905 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:35,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:35,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946378512] [2022-11-23 14:45:35,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946378512] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:45:35,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099276773] [2022-11-23 14:45:35,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:45:35,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:45:35,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:45:35,915 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:45:35,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 14:45:36,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:45:36,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:45:36,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-23 14:45:36,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:45:36,069 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:45:36,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-23 14:45:36,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 12 [2022-11-23 14:45:36,348 INFO L321 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2022-11-23 14:45:36,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 23 [2022-11-23 14:45:36,609 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:36,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:45:37,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2022-11-23 14:45:37,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 23 [2022-11-23 14:45:37,273 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:37,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099276773] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:45:37,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1801735435] [2022-11-23 14:45:37,275 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-23 14:45:37,276 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:45:37,276 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:45:37,276 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:45:37,276 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:45:37,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:37,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:37,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-23 14:45:37,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-23 14:45:37,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:37,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-23 14:45:37,575 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 14:45:37,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-23 14:45:37,644 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 14:45:37,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-23 14:45:37,738 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:45:41,029 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2236#(and (<= 0 |ULTIMATE.start_cstrcat_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcat_#t~post208#1.offset|) (<= |ULTIMATE.start_cstrcat_#t~post207#1.offset| 2147483646) (<= 0 |ULTIMATE.start_cstrcat_~s1#1.base|) (<= |ULTIMATE.start_cstrcat_#in~s2#1.offset| 2147483645) (<= 0 |ULTIMATE.start_main_#t~malloc213#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483646) (= |ULTIMATE.start_main_#t~malloc214#1.offset| 0) (= |ULTIMATE.start_cstrcat_#t~post208#1.base| |ULTIMATE.start_cstrcat_~s2#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc214#1.base|) (<= 0 |ULTIMATE.start_cstrcat_#in~s1#1.base|) (<= |ULTIMATE.start_cstrcat_#t~post208#1.offset| 2147483645) (= |ULTIMATE.start_main_#t~malloc213#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (or (not (<= (+ |ULTIMATE.start_cstrcat_#t~post207#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcat_#t~post207#1.base|))) (not (<= 0 |ULTIMATE.start_cstrcat_#t~post207#1.offset|))) (<= 1 |ULTIMATE.start_cstrcat_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcat_~s1#1.offset| 2147483646) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrcat_#t~post207#1.base|) (= |ULTIMATE.start_cstrcat_#t~post207#1.offset| (+ |ULTIMATE.start_cstrcat_~s~0#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcat_#t~post208#1.base|) (<= 1 |ULTIMATE.start_cstrcat_~s1#1.offset|) (<= |ULTIMATE.start_cstrcat_#in~s1#1.offset| 2147483646) (<= |ULTIMATE.start_main_~length3~0#1| 2147483646) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcat_#in~s2#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 2147483646) (= (select |#valid| |ULTIMATE.start_cstrcat_#t~post208#1.base|) 1) (<= (+ |ULTIMATE.start_cstrcat_#t~post208#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcat_#t~post208#1.base|)) (<= 2 |ULTIMATE.start_main_~length2~0#1|) (= |ULTIMATE.start_cstrcat_#t~post208#1.offset| (+ |ULTIMATE.start_cstrcat_~s2#1.offset| 1)) (= |ULTIMATE.start_cstrcat_#t~post207#1.base| |ULTIMATE.start_cstrcat_~s~0#1.base|) (<= 1 |ULTIMATE.start_main_~length3~0#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |ULTIMATE.start_cstrcat_#t~mem209#1| (select (select |#memory_int| |ULTIMATE.start_cstrcat_#t~post208#1.base|) |ULTIMATE.start_cstrcat_#t~post208#1.offset|)) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 2147483645) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-23 14:45:41,029 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:45:41,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:45:41,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 32 [2022-11-23 14:45:41,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813627360] [2022-11-23 14:45:41,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:45:41,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-23 14:45:41,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:41,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-23 14:45:41,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1651, Unknown=0, NotChecked=0, Total=1806 [2022-11-23 14:45:41,031 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 34 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 33 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:45,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:45:59,813 WARN L233 SmtUtils]: Spent 6.86s on a formula simplification. DAG size of input: 80 DAG size of output: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:46:00,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:46:00,874 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2022-11-23 14:46:00,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-23 14:46:00,875 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 33 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-23 14:46:00,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:46:00,875 INFO L225 Difference]: With dead ends: 46 [2022-11-23 14:46:00,875 INFO L226 Difference]: Without dead ends: 27 [2022-11-23 14:46:00,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=706, Invalid=4550, Unknown=0, NotChecked=0, Total=5256 [2022-11-23 14:46:00,878 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 108 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 26 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:46:00,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 50 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 507 Invalid, 2 Unknown, 0 Unchecked, 3.6s Time] [2022-11-23 14:46:00,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-23 14:46:00,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2022-11-23 14:46:00,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:46:00,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2022-11-23 14:46:00,881 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2022-11-23 14:46:00,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:46:00,881 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2022-11-23 14:46:00,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 33 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:46:00,882 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2022-11-23 14:46:00,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-23 14:46:00,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:46:00,882 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:46:00,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 14:46:01,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-23 14:46:01,089 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-23 14:46:01,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:46:01,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1329599335, now seen corresponding path program 3 times [2022-11-23 14:46:01,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:46:01,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510162149] [2022-11-23 14:46:01,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:46:01,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:46:01,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:46:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:46:01,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:46:01,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510162149] [2022-11-23 14:46:01,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510162149] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:46:01,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103018683] [2022-11-23 14:46:01,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:46:01,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:46:01,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:46:01,663 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:46:01,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 14:46:01,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:46:01,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:46:01,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-23 14:46:01,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:46:01,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-23 14:46:01,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:46:01,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 14:46:02,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 14:46:02,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 14:46:02,122 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:46:02,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-11-23 14:46:02,203 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:46:02,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:46:02,946 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:46:02,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 68 [2022-11-23 14:46:03,247 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_prenex_3 Int) (v_prenex_1 (Array Int Int))) (or (not (<= 0 v_prenex_3)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_prenex_1) |c_ULTIMATE.start_cstrcat_~s2#1.base|) v_prenex_3) 0) (<= 1 v_prenex_3))) is different from false [2022-11-23 14:46:03,402 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:46:03,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-23 14:46:03,413 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:46:03,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-11-23 14:46:03,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-23 14:46:03,501 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-11-23 14:46:03,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103018683] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:46:03,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1169864577] [2022-11-23 14:46:03,507 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-23 14:46:03,507 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:46:03,507 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:46:03,508 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:46:03,508 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:46:03,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:46:03,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:46:03,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-23 14:46:03,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-23 14:46:03,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:46:03,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-23 14:46:03,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:46:03,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:46:03,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:46:03,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:46:03,788 INFO L321 Elim1Store]: treesize reduction 42, result has 32.3 percent of original size [2022-11-23 14:46:03,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 54 [2022-11-23 14:46:03,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-23 14:46:04,147 INFO L321 Elim1Store]: treesize reduction 32, result has 57.3 percent of original size [2022-11-23 14:46:04,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 145 [2022-11-23 14:46:04,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-23 14:46:04,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-23 14:46:05,016 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:46:07,476 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2519#(and (<= 0 |ULTIMATE.start_cstrcat_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrcat_~s2#1.offset| 2147483644) (<= 0 |ULTIMATE.start_cstrcat_~s2#1.base|) (<= 0 (+ 2 |ULTIMATE.start_cstrcat_~s2#1.offset|)) (<= |ULTIMATE.start_cstrcat_#t~post207#1.offset| 2147483646) (<= 0 |ULTIMATE.start_cstrcat_~s1#1.base|) (<= |ULTIMATE.start_cstrcat_#in~s2#1.offset| 2147483645) (<= 0 |ULTIMATE.start_main_#t~malloc213#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483646) (= |ULTIMATE.start_main_#t~malloc214#1.offset| 0) (or (not (<= (+ |ULTIMATE.start_cstrcat_#t~post208#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcat_#t~post208#1.base|))) (not (<= 0 |ULTIMATE.start_cstrcat_#t~post208#1.offset|))) (<= 0 |ULTIMATE.start_main_#t~malloc214#1.base|) (<= 0 |ULTIMATE.start_cstrcat_#in~s1#1.base|) (<= 0 (+ |ULTIMATE.start_cstrcat_#t~post208#1.offset| 1)) (<= |ULTIMATE.start_cstrcat_#t~post208#1.offset| 2147483645) (= |ULTIMATE.start_main_#t~malloc213#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcat_~s~0#1.base|) (<= 1 |ULTIMATE.start_cstrcat_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcat_~s1#1.offset| 2147483646) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrcat_#t~post207#1.base|) (<= 0 |ULTIMATE.start_cstrcat_#t~post208#1.base|) (<= 1 |ULTIMATE.start_cstrcat_~s1#1.offset|) (<= |ULTIMATE.start_cstrcat_#in~s1#1.offset| 2147483646) (<= |ULTIMATE.start_cstrcat_~s~0#1.offset| 2147483645) (<= |ULTIMATE.start_main_~length3~0#1| 2147483646) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcat_#in~s2#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 2147483646) (<= 2 |ULTIMATE.start_main_~length2~0#1|) (<= 1 |ULTIMATE.start_main_~length3~0#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 2147483645) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-23 14:46:07,477 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:46:07,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:46:07,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-11-23 14:46:07,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991076164] [2022-11-23 14:46:07,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:46:07,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-23 14:46:07,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:46:07,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-23 14:46:07,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1540, Unknown=14, NotChecked=80, Total=1806 [2022-11-23 14:46:07,479 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 33 states, 32 states have (on average 1.59375) internal successors, (51), 33 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:46:08,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:46:08,522 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2022-11-23 14:46:08,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 14:46:08,522 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.59375) internal successors, (51), 33 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-23 14:46:08,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:46:08,523 INFO L225 Difference]: With dead ends: 22 [2022-11-23 14:46:08,523 INFO L226 Difference]: Without dead ends: 0 [2022-11-23 14:46:08,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=386, Invalid=2466, Unknown=14, NotChecked=104, Total=2970 [2022-11-23 14:46:08,524 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 19 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:46:08,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 30 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 251 Invalid, 0 Unknown, 12 Unchecked, 0.3s Time] [2022-11-23 14:46:08,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-23 14:46:08,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-23 14:46:08,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:46:08,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-23 14:46:08,525 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2022-11-23 14:46:08,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:46:08,525 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-23 14:46:08,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.59375) internal successors, (51), 33 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:46:08,526 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-23 14:46:08,526 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-23 14:46:08,528 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 11 remaining) [2022-11-23 14:46:08,529 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2022-11-23 14:46:08,529 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2022-11-23 14:46:08,529 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2022-11-23 14:46:08,529 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2022-11-23 14:46:08,529 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2022-11-23 14:46:08,530 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2022-11-23 14:46:08,530 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 11 remaining) [2022-11-23 14:46:08,530 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 11 remaining) [2022-11-23 14:46:08,530 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 11 remaining) [2022-11-23 14:46:08,530 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2022-11-23 14:46:08,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 14:46:08,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:46:08,740 INFO L444 BasicCegarLoop]: Path program histogram: [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:46:08,742 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 14:46:08,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:46:08 BoogieIcfgContainer [2022-11-23 14:46:08,744 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-23 14:46:08,745 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-23 14:46:08,745 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-23 14:46:08,745 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-23 14:46:08,745 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:44:37" (3/4) ... [2022-11-23 14:46:08,748 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-23 14:46:08,757 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2022-11-23 14:46:08,758 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2022-11-23 14:46:08,758 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-23 14:46:08,758 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-23 14:46:08,793 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/witness.graphml [2022-11-23 14:46:08,793 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-23 14:46:08,794 INFO L158 Benchmark]: Toolchain (without parser) took 92271.38ms. Allocated memory was 140.5MB in the beginning and 314.6MB in the end (delta: 174.1MB). Free memory was 108.7MB in the beginning and 143.1MB in the end (delta: -34.4MB). Peak memory consumption was 141.7MB. Max. memory is 16.1GB. [2022-11-23 14:46:08,794 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 140.5MB. Free memory is still 87.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 14:46:08,795 INFO L158 Benchmark]: CACSL2BoogieTranslator took 467.19ms. Allocated memory is still 140.5MB. Free memory was 108.3MB in the beginning and 90.9MB in the end (delta: 17.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-23 14:46:08,795 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.07ms. Allocated memory is still 140.5MB. Free memory was 90.4MB in the beginning and 88.8MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 14:46:08,795 INFO L158 Benchmark]: Boogie Preprocessor took 54.80ms. Allocated memory is still 140.5MB. Free memory was 88.8MB in the beginning and 87.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 14:46:08,796 INFO L158 Benchmark]: RCFGBuilder took 538.46ms. Allocated memory is still 140.5MB. Free memory was 87.0MB in the beginning and 71.1MB in the end (delta: 15.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-23 14:46:08,796 INFO L158 Benchmark]: TraceAbstraction took 91095.58ms. Allocated memory was 140.5MB in the beginning and 314.6MB in the end (delta: 174.1MB). Free memory was 70.3MB in the beginning and 145.9MB in the end (delta: -75.5MB). Peak memory consumption was 101.9MB. Max. memory is 16.1GB. [2022-11-23 14:46:08,796 INFO L158 Benchmark]: Witness Printer took 48.78ms. Allocated memory is still 314.6MB. Free memory was 145.9MB in the beginning and 143.1MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 14:46:08,798 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 140.5MB. Free memory is still 87.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 467.19ms. Allocated memory is still 140.5MB. Free memory was 108.3MB in the beginning and 90.9MB in the end (delta: 17.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 60.07ms. Allocated memory is still 140.5MB. Free memory was 90.4MB in the beginning and 88.8MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 54.80ms. Allocated memory is still 140.5MB. Free memory was 88.8MB in the beginning and 87.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 538.46ms. Allocated memory is still 140.5MB. Free memory was 87.0MB in the beginning and 71.1MB in the end (delta: 15.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 91095.58ms. Allocated memory was 140.5MB in the beginning and 314.6MB in the end (delta: 174.1MB). Free memory was 70.3MB in the beginning and 145.9MB in the end (delta: -75.5MB). Peak memory consumption was 101.9MB. Max. memory is 16.1GB. * Witness Printer took 48.78ms. Allocated memory is still 314.6MB. Free memory was 145.9MB in the beginning and 143.1MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 373]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 91.0s, OverallIterations: 22, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 42.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 19 mSolverCounterUnknown, 1133 SdHoareTripleChecker+Valid, 12.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1133 mSDsluCounter, 707 SdHoareTripleChecker+Invalid, 12.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 110 IncrementalHoareTripleChecker+Unchecked, 513 mSDsCounter, 164 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2780 IncrementalHoareTripleChecker+Invalid, 3073 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 164 mSolverCounterUnsat, 194 mSDtfsCounter, 2780 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 645 GetRequests, 165 SyntacticMatches, 18 SemanticMatches, 462 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 4825 ImplicationChecksByTransitivity, 56.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=20, InterpolantAutomatonStates: 233, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 22 MinimizatonAttempts, 93 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 16.7s InterpolantComputationTime, 336 NumberOfCodeBlocks, 336 NumberOfCodeBlocksAsserted, 40 NumberOfCheckSat, 422 ConstructedInterpolants, 28 QuantifiedInterpolants, 6684 SizeOfPredicates, 162 NumberOfNonLiveVariables, 1455 ConjunctsInSsa, 445 ConjunctsInUnsatCore, 40 InterpolantComputations, 13 PerfectInterpolantSequences, 9/215 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 - AllSpecificationsHoldResult: All specifications hold 11 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-23 14:46:08,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74a650c9-4c52-460b-9f74-dbaaed4fec2b/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE