./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-dietlibc/dirname-2.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-dietlibc/dirname-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur --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 c17dc684f0856c2cb34d9c0f310a5ac71ddc07f596d7c8c46ee2d12464efc754 --- 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-38b53e6 [2022-11-26 01:04:39,011 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 01:04:39,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 01:04:39,034 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 01:04:39,038 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 01:04:39,042 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 01:04:39,045 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 01:04:39,048 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 01:04:39,051 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 01:04:39,057 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 01:04:39,058 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 01:04:39,061 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 01:04:39,061 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 01:04:39,066 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 01:04:39,069 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 01:04:39,072 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 01:04:39,073 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 01:04:39,074 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 01:04:39,076 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 01:04:39,083 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 01:04:39,084 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 01:04:39,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 01:04:39,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 01:04:39,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 01:04:39,099 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 01:04:39,100 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 01:04:39,100 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 01:04:39,102 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 01:04:39,102 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 01:04:39,103 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 01:04:39,104 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 01:04:39,105 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 01:04:39,107 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 01:04:39,109 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 01:04:39,111 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 01:04:39,111 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 01:04:39,112 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 01:04:39,112 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 01:04:39,113 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 01:04:39,114 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 01:04:39,115 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 01:04:39,116 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2022-11-26 01:04:39,158 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 01:04:39,161 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 01:04:39,162 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 01:04:39,162 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 01:04:39,163 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 01:04:39,163 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 01:04:39,163 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 01:04:39,164 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 01:04:39,164 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 01:04:39,164 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 01:04:39,165 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 01:04:39,166 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 01:04:39,166 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 01:04:39,166 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 01:04:39,166 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 01:04:39,167 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 01:04:39,167 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 01:04:39,167 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 01:04:39,168 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-26 01:04:39,168 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-26 01:04:39,168 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 01:04:39,169 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 01:04:39,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 01:04:39,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 01:04:39,169 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-26 01:04:39,169 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-26 01:04:39,170 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-26 01:04:39,170 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 01:04:39,170 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 01:04:39,171 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 01:04:39,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 01:04:39,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 01:04:39,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:04:39,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 01:04:39,172 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 01:04:39,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 01:04:39,172 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 01:04:39,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 01:04:39,173 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 01:04:39,173 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_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c17dc684f0856c2cb34d9c0f310a5ac71ddc07f596d7c8c46ee2d12464efc754 [2022-11-26 01:04:39,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 01:04:39,490 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 01:04:39,517 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 01:04:39,518 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 01:04:39,519 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 01:04:39,520 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/termination-dietlibc/dirname-2.i [2022-11-26 01:04:42,668 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 01:04:42,931 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 01:04:42,931 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/sv-benchmarks/c/termination-dietlibc/dirname-2.i [2022-11-26 01:04:42,942 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/data/245613850/0329b721a8e24c83ab10263bce1658ed/FLAG84e7d7c9b [2022-11-26 01:04:42,961 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/data/245613850/0329b721a8e24c83ab10263bce1658ed [2022-11-26 01:04:42,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 01:04:42,970 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 01:04:42,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 01:04:42,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 01:04:42,981 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 01:04:42,982 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:04:42" (1/1) ... [2022-11-26 01:04:42,983 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23b27fd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:42, skipping insertion in model container [2022-11-26 01:04:42,984 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:04:42" (1/1) ... [2022-11-26 01:04:42,992 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 01:04:43,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:04:43,400 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:04:43,420 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 01:04:43,478 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:04:43,513 INFO L208 MainTranslator]: Completed translation [2022-11-26 01:04:43,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:43 WrapperNode [2022-11-26 01:04:43,514 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 01:04:43,515 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 01:04:43,515 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 01:04:43,515 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 01:04:43,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:43" (1/1) ... [2022-11-26 01:04:43,557 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:43" (1/1) ... [2022-11-26 01:04:43,580 INFO L138 Inliner]: procedures = 114, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 94 [2022-11-26 01:04:43,580 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 01:04:43,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 01:04:43,581 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 01:04:43,581 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 01:04:43,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:43" (1/1) ... [2022-11-26 01:04:43,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:43" (1/1) ... [2022-11-26 01:04:43,594 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:43" (1/1) ... [2022-11-26 01:04:43,594 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:43" (1/1) ... [2022-11-26 01:04:43,601 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:43" (1/1) ... [2022-11-26 01:04:43,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:43" (1/1) ... [2022-11-26 01:04:43,606 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:43" (1/1) ... [2022-11-26 01:04:43,607 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:43" (1/1) ... [2022-11-26 01:04:43,610 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 01:04:43,611 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 01:04:43,611 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 01:04:43,611 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 01:04:43,612 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:43" (1/1) ... [2022-11-26 01:04:43,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:04:43,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:04:43,653 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 01:04:43,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 01:04:43,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 01:04:43,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 01:04:43,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 01:04:43,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 01:04:43,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 01:04:43,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 01:04:43,794 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 01:04:43,797 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 01:04:44,152 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 01:04:44,213 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 01:04:44,214 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-26 01:04:44,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:04:44 BoogieIcfgContainer [2022-11-26 01:04:44,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 01:04:44,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 01:04:44,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 01:04:44,235 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 01:04:44,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 01:04:42" (1/3) ... [2022-11-26 01:04:44,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26f0348b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:04:44, skipping insertion in model container [2022-11-26 01:04:44,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:43" (2/3) ... [2022-11-26 01:04:44,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26f0348b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:04:44, skipping insertion in model container [2022-11-26 01:04:44,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:04:44" (3/3) ... [2022-11-26 01:04:44,238 INFO L112 eAbstractionObserver]: Analyzing ICFG dirname-2.i [2022-11-26 01:04:44,272 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 01:04:44,272 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2022-11-26 01:04:44,361 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 01:04:44,368 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;@32d7b143, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 01:04:44,368 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2022-11-26 01:04:44,373 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 43 states have internal predecessors, (55), 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) [2022-11-26 01:04:44,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-26 01:04:44,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:44,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-26 01:04:44,381 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 01:04:44,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:44,387 INFO L85 PathProgramCache]: Analyzing trace with hash 154039, now seen corresponding path program 1 times [2022-11-26 01:04:44,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:44,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116535861] [2022-11-26 01:04:44,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:44,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:44,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:44,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:04:44,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:44,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116535861] [2022-11-26 01:04:44,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116535861] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:04:44,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:04:44,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 01:04:44,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324267022] [2022-11-26 01:04:44,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:04:44,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:04:44,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:44,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:04:44,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:04:44,582 INFO L87 Difference]: Start difference. First operand has 44 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 43 states have internal predecessors, (55), 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) [2022-11-26 01:04:44,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:44,699 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-11-26 01:04:44,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:04:44,702 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 [2022-11-26 01:04:44,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:44,710 INFO L225 Difference]: With dead ends: 45 [2022-11-26 01:04:44,713 INFO L226 Difference]: Without dead ends: 43 [2022-11-26 01:04:44,716 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 [2022-11-26 01:04:44,721 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 1 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:44,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 71 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:04:44,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-26 01:04:44,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-26 01:04:44,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 42 states have internal predecessors, (49), 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) [2022-11-26 01:04:44,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-11-26 01:04:44,760 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 3 [2022-11-26 01:04:44,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:44,761 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-11-26 01:04:44,761 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) [2022-11-26 01:04:44,761 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-11-26 01:04:44,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-26 01:04:44,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:44,762 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-26 01:04:44,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 01:04:44,763 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 01:04:44,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:44,763 INFO L85 PathProgramCache]: Analyzing trace with hash 153986, now seen corresponding path program 1 times [2022-11-26 01:04:44,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:44,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653852438] [2022-11-26 01:04:44,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:44,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:44,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:44,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:04:44,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:44,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653852438] [2022-11-26 01:04:44,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653852438] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:04:44,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:04:44,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:04:44,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154104658] [2022-11-26 01:04:44,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:04:44,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:04:44,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:44,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:04:44,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:04:44,869 INFO L87 Difference]: Start difference. First operand 43 states and 49 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) [2022-11-26 01:04:44,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:44,925 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2022-11-26 01:04:44,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:04:44,928 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 [2022-11-26 01:04:44,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:44,929 INFO L225 Difference]: With dead ends: 42 [2022-11-26 01:04:44,930 INFO L226 Difference]: Without dead ends: 42 [2022-11-26 01:04:44,930 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 [2022-11-26 01:04:44,932 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:44,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 28 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:04:44,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-26 01:04:44,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-11-26 01:04:44,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 24 states have (on average 2.0) internal successors, (48), 41 states have internal predecessors, (48), 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) [2022-11-26 01:04:44,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-11-26 01:04:44,942 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 3 [2022-11-26 01:04:44,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:44,943 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-11-26 01:04:44,944 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) [2022-11-26 01:04:44,944 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-11-26 01:04:44,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-26 01:04:44,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:44,945 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-26 01:04:44,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 01:04:44,945 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 01:04:44,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:44,946 INFO L85 PathProgramCache]: Analyzing trace with hash 153987, now seen corresponding path program 1 times [2022-11-26 01:04:44,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:44,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493333195] [2022-11-26 01:04:44,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:44,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:45,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:04:45,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:45,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493333195] [2022-11-26 01:04:45,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493333195] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:04:45,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:04:45,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:04:45,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083198598] [2022-11-26 01:04:45,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:04:45,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:04:45,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:45,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:04:45,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:04:45,159 INFO L87 Difference]: Start difference. First operand 42 states and 48 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) [2022-11-26 01:04:45,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:45,221 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2022-11-26 01:04:45,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:04:45,222 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 [2022-11-26 01:04:45,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:45,223 INFO L225 Difference]: With dead ends: 41 [2022-11-26 01:04:45,223 INFO L226 Difference]: Without dead ends: 41 [2022-11-26 01:04:45,224 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 [2022-11-26 01:04:45,225 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 90 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:45,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 28 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:04:45,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-26 01:04:45,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-26 01:04:45,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 40 states have internal predecessors, (47), 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) [2022-11-26 01:04:45,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-11-26 01:04:45,231 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 3 [2022-11-26 01:04:45,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:45,231 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-11-26 01:04:45,231 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) [2022-11-26 01:04:45,232 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-11-26 01:04:45,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 01:04:45,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:45,232 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 01:04:45,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 01:04:45,233 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 01:04:45,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:45,234 INFO L85 PathProgramCache]: Analyzing trace with hash 295992119, now seen corresponding path program 1 times [2022-11-26 01:04:45,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:45,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630097349] [2022-11-26 01:04:45,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:45,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:45,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:45,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:04:45,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:45,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630097349] [2022-11-26 01:04:45,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630097349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:04:45,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:04:45,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:04:45,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136735049] [2022-11-26 01:04:45,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:04:45,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:04:45,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:45,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:04:45,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:04:45,318 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2022-11-26 01:04:45,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:45,359 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-11-26 01:04:45,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:04:45,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2022-11-26 01:04:45,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:45,361 INFO L225 Difference]: With dead ends: 41 [2022-11-26 01:04:45,361 INFO L226 Difference]: Without dead ends: 41 [2022-11-26 01:04:45,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:04:45,363 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 87 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:45,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 28 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:04:45,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-26 01:04:45,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-26 01:04:45,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 40 states have internal predecessors, (46), 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) [2022-11-26 01:04:45,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2022-11-26 01:04:45,378 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 6 [2022-11-26 01:04:45,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:45,379 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2022-11-26 01:04:45,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2022-11-26 01:04:45,379 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2022-11-26 01:04:45,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 01:04:45,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:45,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:04:45,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 01:04:45,381 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 01:04:45,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:45,383 INFO L85 PathProgramCache]: Analyzing trace with hash 585783683, now seen corresponding path program 1 times [2022-11-26 01:04:45,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:45,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298329908] [2022-11-26 01:04:45,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:45,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:45,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:04:45,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:45,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298329908] [2022-11-26 01:04:45,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298329908] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:04:45,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:04:45,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:04:45,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411834248] [2022-11-26 01:04:45,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:04:45,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:04:45,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:45,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:04:45,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:04:45,543 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-11-26 01:04:45,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:45,612 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-11-26 01:04:45,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:04:45,613 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 [2022-11-26 01:04:45,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:45,614 INFO L225 Difference]: With dead ends: 39 [2022-11-26 01:04:45,614 INFO L226 Difference]: Without dead ends: 39 [2022-11-26 01:04:45,616 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 [2022-11-26 01:04:45,622 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 71 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:45,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 12 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:04:45,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-26 01:04:45,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2022-11-26 01:04:45,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 37 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) [2022-11-26 01:04:45,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2022-11-26 01:04:45,636 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 7 [2022-11-26 01:04:45,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:45,637 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2022-11-26 01:04:45,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-11-26 01:04:45,637 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2022-11-26 01:04:45,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 01:04:45,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:45,639 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:04:45,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 01:04:45,639 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 01:04:45,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:45,640 INFO L85 PathProgramCache]: Analyzing trace with hash 585783684, now seen corresponding path program 1 times [2022-11-26 01:04:45,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:45,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496853752] [2022-11-26 01:04:45,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:45,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:45,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:45,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:04:45,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:45,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496853752] [2022-11-26 01:04:45,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496853752] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:04:45,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:04:45,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:04:45,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741922528] [2022-11-26 01:04:45,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:04:45,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:04:45,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:45,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:04:45,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:04:45,906 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 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) [2022-11-26 01:04:46,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:46,102 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2022-11-26 01:04:46,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:04:46,103 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 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 [2022-11-26 01:04:46,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:46,107 INFO L225 Difference]: With dead ends: 70 [2022-11-26 01:04:46,107 INFO L226 Difference]: Without dead ends: 70 [2022-11-26 01:04:46,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:04:46,115 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 186 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:46,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 25 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:04:46,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-26 01:04:46,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 41. [2022-11-26 01:04:46,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 40 states have internal predecessors, (46), 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) [2022-11-26 01:04:46,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2022-11-26 01:04:46,123 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 7 [2022-11-26 01:04:46,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:46,123 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2022-11-26 01:04:46,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 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) [2022-11-26 01:04:46,124 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2022-11-26 01:04:46,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 01:04:46,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:46,124 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:04:46,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 01:04:46,125 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 01:04:46,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:46,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1862463245, now seen corresponding path program 1 times [2022-11-26 01:04:46,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:46,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115638570] [2022-11-26 01:04:46,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:46,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:46,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:46,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:04:46,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:46,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115638570] [2022-11-26 01:04:46,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115638570] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:04:46,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856414241] [2022-11-26 01:04:46,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:46,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:46,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:04:46,543 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:04:46,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 01:04:46,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:46,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-26 01:04:46,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:04:46,763 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 14 treesize of output 10 [2022-11-26 01:04:47,054 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:04:47,055 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 18 treesize of output 19 [2022-11-26 01:04:47,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:04:47,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:04:47,448 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 13 treesize of output 11 [2022-11-26 01:04:47,454 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 16 treesize of output 12 [2022-11-26 01:04:47,464 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 [2022-11-26 01:04:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:04:47,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856414241] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:04:47,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [340680441] [2022-11-26 01:04:47,498 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 01:04:47,499 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:04:47,503 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:04:47,509 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:04:47,509 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:04:47,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-26 01:04:47,574 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 14 treesize of output 10 [2022-11-26 01:04:48,077 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:04:49,479 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '679#(and (<= |ULTIMATE.start_strrchr_~c#1| 47) (<= 0 |ULTIMATE.start_strrchr_#in~t#1.base|) (<= |ULTIMATE.start_dirname_~path#1.offset| 0) (<= 0 |ULTIMATE.start_main_~in~0#1.offset|) (<= |ULTIMATE.start_strrchr_#in~t#1.offset| 0) (<= 0 |ULTIMATE.start_dirname_~path#1.offset|) (< (select |#length| |ULTIMATE.start_strrchr_~t#1.base|) (+ |ULTIMATE.start_strrchr_~t#1.offset| 1)) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_strrchr_#in~t#1.offset|) (<= 0 |ULTIMATE.start_dirname_~path#1.base|) (<= 47 |ULTIMATE.start_strrchr_~c#1|) (<= 0 |ULTIMATE.start_dirname_#in~path#1.base|) (<= |ULTIMATE.start_main_~in_len~0#1| 2147483647) (<= 0 |ULTIMATE.start_strrchr_~t#1.offset|) (<= |ULTIMATE.start_strrchr_#in~c#1| 47) (<= 0 |ULTIMATE.start_main_~in~0#1.base|) (<= 0 |ULTIMATE.start_strrchr_~l~0#1.offset|) (<= 0 |ULTIMATE.start_strrchr_~t#1.base|) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= |ULTIMATE.start_main_~in~0#1.offset| 0) (<= 47 |ULTIMATE.start_strrchr_#in~c#1|) (<= |ULTIMATE.start_dirname_#in~path#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_strrchr_~l~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_dirname_#in~path#1.offset|) (<= 1 |ULTIMATE.start_main_~in_len~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (= |#NULL.base| 0))' at error location [2022-11-26 01:04:49,480 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:04:49,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:04:49,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2022-11-26 01:04:49,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524943518] [2022-11-26 01:04:49,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:04:49,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-26 01:04:49,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:49,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-26 01:04:49,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-11-26 01:04:49,482 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 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) [2022-11-26 01:04:50,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:50,161 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2022-11-26 01:04:50,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 01:04:50,162 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 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) Word has length 11 [2022-11-26 01:04:50,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:50,164 INFO L225 Difference]: With dead ends: 102 [2022-11-26 01:04:50,164 INFO L226 Difference]: Without dead ends: 102 [2022-11-26 01:04:50,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2022-11-26 01:04:50,165 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 614 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:50,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [614 Valid, 70 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:04:50,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-26 01:04:50,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 43. [2022-11-26 01:04:50,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 42 states have internal predecessors, (49), 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) [2022-11-26 01:04:50,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-11-26 01:04:50,170 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 11 [2022-11-26 01:04:50,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:50,170 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-11-26 01:04:50,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 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) [2022-11-26 01:04:50,170 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-11-26 01:04:50,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 01:04:50,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:50,176 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:04:50,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 01:04:50,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:50,379 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 01:04:50,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:50,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1901821395, now seen corresponding path program 1 times [2022-11-26 01:04:50,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:50,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284855527] [2022-11-26 01:04:50,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:50,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:50,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:50,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:04:50,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:50,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284855527] [2022-11-26 01:04:50,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284855527] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:04:50,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:04:50,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-26 01:04:50,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708866587] [2022-11-26 01:04:50,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:04:50,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 01:04:50,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:50,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 01:04:50,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:04:50,575 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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) [2022-11-26 01:04:50,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:50,717 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2022-11-26 01:04:50,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 01:04:50,718 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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 [2022-11-26 01:04:50,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:50,718 INFO L225 Difference]: With dead ends: 51 [2022-11-26 01:04:50,718 INFO L226 Difference]: Without dead ends: 51 [2022-11-26 01:04:50,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-11-26 01:04:50,719 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 19 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:50,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 141 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:04:50,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-26 01:04:50,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2022-11-26 01:04:50,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.59375) internal successors, (51), 44 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) [2022-11-26 01:04:50,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-11-26 01:04:50,722 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 12 [2022-11-26 01:04:50,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:50,723 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-11-26 01:04:50,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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) [2022-11-26 01:04:50,723 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-11-26 01:04:50,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 01:04:50,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:50,723 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:04:50,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 01:04:50,724 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 01:04:50,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:50,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1173078899, now seen corresponding path program 1 times [2022-11-26 01:04:50,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:50,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721836661] [2022-11-26 01:04:50,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:50,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:50,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:04:50,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:50,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721836661] [2022-11-26 01:04:50,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721836661] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:04:50,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:04:50,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:04:50,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090796358] [2022-11-26 01:04:50,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:04:50,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:04:50,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:50,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:04:50,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:04:50,838 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-11-26 01:04:50,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:50,872 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-11-26 01:04:50,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:04:50,875 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 13 [2022-11-26 01:04:50,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:50,876 INFO L225 Difference]: With dead ends: 44 [2022-11-26 01:04:50,876 INFO L226 Difference]: Without dead ends: 39 [2022-11-26 01:04:50,876 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 [2022-11-26 01:04:50,878 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 29 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:50,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 48 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:04:50,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-26 01:04:50,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-26 01:04:50,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 38 states have internal predecessors, (42), 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) [2022-11-26 01:04:50,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-11-26 01:04:50,890 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 13 [2022-11-26 01:04:50,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:50,890 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-11-26 01:04:50,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-11-26 01:04:50,890 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-11-26 01:04:50,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 01:04:50,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:50,891 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-26 01:04:50,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 01:04:50,891 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 01:04:50,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:50,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1091012382, now seen corresponding path program 2 times [2022-11-26 01:04:50,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:50,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419472620] [2022-11-26 01:04:50,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:50,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:50,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:51,503 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:04:51,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:51,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419472620] [2022-11-26 01:04:51,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419472620] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:04:51,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925976465] [2022-11-26 01:04:51,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:04:51,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:51,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:04:51,506 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:04:51,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 01:04:51,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 01:04:51,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:04:51,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-26 01:04:51,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:04:51,629 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 14 treesize of output 10 [2022-11-26 01:04:52,060 INFO L321 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2022-11-26 01:04:52,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 39 [2022-11-26 01:04:52,228 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:04:52,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:04:52,706 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 27 treesize of output 23 [2022-11-26 01:04:52,720 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:04:52,721 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 43 treesize of output 47 [2022-11-26 01:04:52,734 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 95 treesize of output 77 [2022-11-26 01:04:52,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:04:52,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925976465] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:04:52,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [368957199] [2022-11-26 01:04:52,768 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 01:04:52,769 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:04:52,769 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:04:52,769 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:04:52,769 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:04:52,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-26 01:04:52,799 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 14 treesize of output 10 [2022-11-26 01:04:53,127 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:04:54,545 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1145#(and (<= |ULTIMATE.start_strrchr_~c#1| 47) (<= 0 |ULTIMATE.start_strrchr_#in~t#1.base|) (<= |ULTIMATE.start_dirname_~path#1.offset| 0) (<= 0 |ULTIMATE.start_main_~in~0#1.offset|) (<= |ULTIMATE.start_strrchr_#in~t#1.offset| 0) (<= 0 |ULTIMATE.start_dirname_~path#1.offset|) (< (select |#length| |ULTIMATE.start_strrchr_~t#1.base|) (+ |ULTIMATE.start_strrchr_~t#1.offset| 1)) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_strrchr_#in~t#1.offset|) (<= 0 |ULTIMATE.start_dirname_~path#1.base|) (<= 47 |ULTIMATE.start_strrchr_~c#1|) (<= 0 |ULTIMATE.start_dirname_#in~path#1.base|) (<= |ULTIMATE.start_main_~in_len~0#1| 2147483647) (<= 0 |ULTIMATE.start_strrchr_~t#1.offset|) (<= |ULTIMATE.start_strrchr_#in~c#1| 47) (<= 0 |ULTIMATE.start_main_~in~0#1.base|) (<= 0 |ULTIMATE.start_strrchr_~l~0#1.offset|) (<= 0 |ULTIMATE.start_strrchr_~t#1.base|) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= |ULTIMATE.start_main_~in~0#1.offset| 0) (<= 47 |ULTIMATE.start_strrchr_#in~c#1|) (<= |ULTIMATE.start_dirname_#in~path#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_strrchr_~l~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_dirname_#in~path#1.offset|) (<= 1 |ULTIMATE.start_main_~in_len~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (= |#NULL.base| 0))' at error location [2022-11-26 01:04:54,546 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:04:54,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:04:54,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2022-11-26 01:04:54,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641871906] [2022-11-26 01:04:54,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:04:54,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-26 01:04:54,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:54,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-26 01:04:54,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2022-11-26 01:04:54,548 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 24 states, 23 states have (on average 1.826086956521739) internal successors, (42), 24 states have internal predecessors, (42), 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) [2022-11-26 01:04:58,513 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] [2022-11-26 01:04:59,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:59,420 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2022-11-26 01:04:59,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 01:04:59,421 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.826086956521739) internal successors, (42), 24 states have internal predecessors, (42), 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 [2022-11-26 01:04:59,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:59,422 INFO L225 Difference]: With dead ends: 95 [2022-11-26 01:04:59,422 INFO L226 Difference]: Without dead ends: 95 [2022-11-26 01:04:59,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=274, Invalid=1366, Unknown=0, NotChecked=0, Total=1640 [2022-11-26 01:04:59,423 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 1032 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 67 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1032 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:59,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1032 Valid, 130 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 413 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2022-11-26 01:04:59,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-26 01:04:59,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 36. [2022-11-26 01:04:59,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.56) internal successors, (39), 35 states have internal predecessors, (39), 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) [2022-11-26 01:04:59,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-11-26 01:04:59,427 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 15 [2022-11-26 01:04:59,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:59,427 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-11-26 01:04:59,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.826086956521739) internal successors, (42), 24 states have internal predecessors, (42), 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) [2022-11-26 01:04:59,428 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-11-26 01:04:59,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-26 01:04:59,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:59,429 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:04:59,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-26 01:04:59,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:59,634 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 01:04:59,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:59,635 INFO L85 PathProgramCache]: Analyzing trace with hash 538318878, now seen corresponding path program 1 times [2022-11-26 01:04:59,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:59,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394482282] [2022-11-26 01:04:59,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:59,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:59,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:00,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:05:00,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:00,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394482282] [2022-11-26 01:05:00,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394482282] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:00,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249125530] [2022-11-26 01:05:00,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:00,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:00,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:00,261 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:00,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 01:05:00,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:00,334 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-26 01:05:00,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:00,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:00,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 42 [2022-11-26 01:05:01,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:05:01,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:05:01,364 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:05:01,364 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 22 treesize of output 26 [2022-11-26 01:05:02,120 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:05:02,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 181 treesize of output 253 [2022-11-26 01:05:10,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:05:10,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249125530] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:05:10,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1590867180] [2022-11-26 01:05:10,092 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-26 01:05:10,093 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:05:10,093 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:05:10,093 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:05:10,093 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:05:10,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-26 01:05:10,122 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 14 treesize of output 10 [2022-11-26 01:05:10,550 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:05:12,223 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1426#(and (<= |ULTIMATE.start_strrchr_~c#1| 47) (<= 0 |ULTIMATE.start_strrchr_#in~t#1.base|) (<= |ULTIMATE.start_dirname_~path#1.offset| 0) (<= 0 |ULTIMATE.start_main_~in~0#1.offset|) (<= |ULTIMATE.start_strrchr_#in~t#1.offset| 0) (<= 0 |ULTIMATE.start_dirname_~path#1.offset|) (<= 0 |ULTIMATE.start_strrchr_#in~t#1.offset|) (<= 0 |ULTIMATE.start_dirname_~path#1.base|) (<= 47 |ULTIMATE.start_strrchr_~c#1|) (= |ULTIMATE.start_strrchr_~l~0#1.base| |ULTIMATE.start_strrchr_#res#1.base|) (<= 0 |ULTIMATE.start_dirname_#in~path#1.base|) (= |ULTIMATE.start_strrchr_#res#1.offset| |ULTIMATE.start_dirname_~c~0#1.offset|) (<= |ULTIMATE.start_main_~in_len~0#1| 2147483647) (<= 0 |ULTIMATE.start_strrchr_~t#1.offset|) (<= 0 |ULTIMATE.start_main_~in~0#1.base|) (<= 0 |ULTIMATE.start_strrchr_~l~0#1.offset|) (<= 0 |ULTIMATE.start_strrchr_~t#1.base|) (= |ULTIMATE.start_strrchr_#in~c#1| 47) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= |ULTIMATE.start_main_~in~0#1.offset| 0) (= |#NULL.offset| 0) (= |ULTIMATE.start_dirname_~c~0#1.base| |ULTIMATE.start_strrchr_#res#1.base|) (= |ULTIMATE.start_strrchr_#res#1.offset| |ULTIMATE.start_strrchr_~l~0#1.offset|) (<= |ULTIMATE.start_dirname_#in~path#1.offset| 0) (or (not (= |ULTIMATE.start_dirname_~c~0#1.offset| 0)) (not (= |ULTIMATE.start_dirname_~c~0#1.base| 0))) (<= 0 |ULTIMATE.start_strrchr_~l~0#1.base|) (not (<= (+ 2 |ULTIMATE.start_dirname_~c~0#1.offset|) (select |#length| |ULTIMATE.start_dirname_~c~0#1.base|))) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_dirname_#in~path#1.offset|) (<= 1 |ULTIMATE.start_main_~in_len~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (= |#NULL.base| 0))' at error location [2022-11-26 01:05:12,224 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:05:12,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:05:12,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2022-11-26 01:05:12,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752011921] [2022-11-26 01:05:12,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:05:12,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-26 01:05:12,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:12,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-26 01:05:12,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1541, Unknown=0, NotChecked=0, Total=1722 [2022-11-26 01:05:12,227 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 33 states, 32 states have (on average 1.4375) internal successors, (46), 33 states have internal predecessors, (46), 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) [2022-11-26 01:05:19,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:19,282 INFO L93 Difference]: Finished difference Result 124 states and 137 transitions. [2022-11-26 01:05:19,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-26 01:05:19,282 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.4375) internal successors, (46), 33 states have internal predecessors, (46), 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 [2022-11-26 01:05:19,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:19,283 INFO L225 Difference]: With dead ends: 124 [2022-11-26 01:05:19,283 INFO L226 Difference]: Without dead ends: 124 [2022-11-26 01:05:19,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1735 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1216, Invalid=5590, Unknown=0, NotChecked=0, Total=6806 [2022-11-26 01:05:19,285 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1133 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1133 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:19,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1133 Valid, 84 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 01:05:19,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-26 01:05:19,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 46. [2022-11-26 01:05:19,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 45 states have internal predecessors, (55), 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) [2022-11-26 01:05:19,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2022-11-26 01:05:19,289 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 16 [2022-11-26 01:05:19,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:19,289 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2022-11-26 01:05:19,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.4375) internal successors, (46), 33 states have internal predecessors, (46), 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) [2022-11-26 01:05:19,290 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2022-11-26 01:05:19,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-26 01:05:19,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:19,290 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:05:19,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 01:05:19,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:19,511 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 01:05:19,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:19,511 INFO L85 PathProgramCache]: Analyzing trace with hash 538318877, now seen corresponding path program 1 times [2022-11-26 01:05:19,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:19,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184424731] [2022-11-26 01:05:19,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:19,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:19,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:19,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:05:19,874 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:19,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184424731] [2022-11-26 01:05:19,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184424731] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:19,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223181255] [2022-11-26 01:05:19,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:19,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:19,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:19,880 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:19,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 01:05:19,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:19,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-26 01:05:19,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:20,111 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:05:20,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 66 [2022-11-26 01:05:20,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:05:20,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:05:20,606 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:05:20,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 115 [2022-11-26 01:05:20,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:05:20,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223181255] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:05:20,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [984737484] [2022-11-26 01:05:20,781 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-26 01:05:20,781 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:05:20,801 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:05:20,801 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:05:20,801 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:05:20,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-26 01:05:20,835 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 14 treesize of output 10 [2022-11-26 01:05:21,227 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:05:22,562 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1797#(and (<= |ULTIMATE.start_strrchr_~c#1| 47) (<= 0 |ULTIMATE.start_strrchr_#in~t#1.base|) (<= |ULTIMATE.start_dirname_~path#1.offset| 0) (<= 0 |ULTIMATE.start_main_~in~0#1.offset|) (not (= (select |#valid| |ULTIMATE.start_dirname_~c~0#1.base|) 1)) (<= |ULTIMATE.start_strrchr_#in~t#1.offset| 0) (<= 0 |ULTIMATE.start_dirname_~path#1.offset|) (<= 0 |ULTIMATE.start_strrchr_#in~t#1.offset|) (<= 0 |ULTIMATE.start_dirname_~path#1.base|) (<= 47 |ULTIMATE.start_strrchr_~c#1|) (= |ULTIMATE.start_strrchr_~l~0#1.base| |ULTIMATE.start_strrchr_#res#1.base|) (<= 0 |ULTIMATE.start_dirname_#in~path#1.base|) (= |ULTIMATE.start_strrchr_#res#1.offset| |ULTIMATE.start_dirname_~c~0#1.offset|) (<= |ULTIMATE.start_main_~in_len~0#1| 2147483647) (<= 0 |ULTIMATE.start_strrchr_~t#1.offset|) (<= 0 |ULTIMATE.start_main_~in~0#1.base|) (<= 0 |ULTIMATE.start_strrchr_~l~0#1.offset|) (<= 0 |ULTIMATE.start_strrchr_~t#1.base|) (= |ULTIMATE.start_strrchr_#in~c#1| 47) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= |ULTIMATE.start_main_~in~0#1.offset| 0) (= |#NULL.offset| 0) (= |ULTIMATE.start_dirname_~c~0#1.base| |ULTIMATE.start_strrchr_#res#1.base|) (= |ULTIMATE.start_strrchr_#res#1.offset| |ULTIMATE.start_strrchr_~l~0#1.offset|) (<= |ULTIMATE.start_dirname_#in~path#1.offset| 0) (or (not (= |ULTIMATE.start_dirname_~c~0#1.offset| 0)) (not (= |ULTIMATE.start_dirname_~c~0#1.base| 0))) (<= 0 |ULTIMATE.start_strrchr_~l~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_dirname_#in~path#1.offset|) (<= 1 |ULTIMATE.start_main_~in_len~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (= |#NULL.base| 0))' at error location [2022-11-26 01:05:22,562 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:05:22,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:05:22,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 19 [2022-11-26 01:05:22,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729039530] [2022-11-26 01:05:22,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:05:22,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 01:05:22,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:22,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 01:05:22,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2022-11-26 01:05:22,565 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 20 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) [2022-11-26 01:05:23,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:23,667 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2022-11-26 01:05:23,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-26 01:05:23,667 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 20 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) Word has length 16 [2022-11-26 01:05:23,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:23,668 INFO L225 Difference]: With dead ends: 71 [2022-11-26 01:05:23,668 INFO L226 Difference]: Without dead ends: 71 [2022-11-26 01:05:23,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=351, Invalid=1541, Unknown=0, NotChecked=0, Total=1892 [2022-11-26 01:05:23,669 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 258 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:23,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 35 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:05:23,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-26 01:05:23,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 43. [2022-11-26 01:05:23,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 42 states have internal predecessors, (49), 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) [2022-11-26 01:05:23,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-11-26 01:05:23,673 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 16 [2022-11-26 01:05:23,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:23,673 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-11-26 01:05:23,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 20 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) [2022-11-26 01:05:23,673 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-11-26 01:05:23,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-26 01:05:23,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:23,674 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:05:23,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 01:05:23,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-26 01:05:23,880 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 01:05:23,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:23,880 INFO L85 PathProgramCache]: Analyzing trace with hash -350160193, now seen corresponding path program 1 times [2022-11-26 01:05:23,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:23,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67010763] [2022-11-26 01:05:23,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:23,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:23,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:24,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:05:24,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:24,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67010763] [2022-11-26 01:05:24,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67010763] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:24,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377802572] [2022-11-26 01:05:24,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:24,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:24,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:24,079 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:24,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 01:05:24,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:24,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 01:05:24,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:24,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 01:05:24,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:05:24,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377802572] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:05:24,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:05:24,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-11-26 01:05:24,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218300872] [2022-11-26 01:05:24,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:05:24,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:05:24,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:24,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:05:24,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-26 01:05:24,189 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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) [2022-11-26 01:05:24,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:24,265 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2022-11-26 01:05:24,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:05:24,266 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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 [2022-11-26 01:05:24,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:24,267 INFO L225 Difference]: With dead ends: 63 [2022-11-26 01:05:24,267 INFO L226 Difference]: Without dead ends: 62 [2022-11-26 01:05:24,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-26 01:05:24,268 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 14 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:24,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 39 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:05:24,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-26 01:05:24,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 41. [2022-11-26 01:05:24,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 40 states have internal predecessors, (46), 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) [2022-11-26 01:05:24,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2022-11-26 01:05:24,271 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 19 [2022-11-26 01:05:24,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:24,271 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2022-11-26 01:05:24,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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) [2022-11-26 01:05:24,272 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2022-11-26 01:05:24,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-26 01:05:24,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:24,273 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:05:24,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 01:05:24,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-26 01:05:24,478 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 01:05:24,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:24,479 INFO L85 PathProgramCache]: Analyzing trace with hash 2029270819, now seen corresponding path program 1 times [2022-11-26 01:05:24,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:24,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519861044] [2022-11-26 01:05:24,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:24,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:24,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:24,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 01:05:24,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:24,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519861044] [2022-11-26 01:05:24,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519861044] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:05:24,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:05:24,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:05:24,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906571779] [2022-11-26 01:05:24,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:05:24,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:05:24,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:24,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:05:24,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:05:24,518 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 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) [2022-11-26 01:05:24,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:24,561 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2022-11-26 01:05:24,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:05:24,562 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 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 [2022-11-26 01:05:24,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:24,563 INFO L225 Difference]: With dead ends: 55 [2022-11-26 01:05:24,563 INFO L226 Difference]: Without dead ends: 55 [2022-11-26 01:05:24,563 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 [2022-11-26 01:05:24,564 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:24,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 34 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:05:24,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-26 01:05:24,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2022-11-26 01:05:24,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 39 states have internal predecessors, (45), 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) [2022-11-26 01:05:24,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-11-26 01:05:24,567 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 20 [2022-11-26 01:05:24,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:24,567 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-11-26 01:05:24,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 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) [2022-11-26 01:05:24,567 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-11-26 01:05:24,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-26 01:05:24,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:24,568 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:05:24,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-26 01:05:24,569 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 01:05:24,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:24,569 INFO L85 PathProgramCache]: Analyzing trace with hash 2029270820, now seen corresponding path program 1 times [2022-11-26 01:05:24,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:24,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408365703] [2022-11-26 01:05:24,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:24,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:24,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:24,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:05:24,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:24,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408365703] [2022-11-26 01:05:24,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408365703] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:24,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225828902] [2022-11-26 01:05:24,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:24,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:24,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:24,932 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:24,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 01:05:25,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:25,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 01:05:25,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:25,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 01:05:25,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:05:25,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225828902] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:05:25,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:05:25,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 16 [2022-11-26 01:05:25,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966779383] [2022-11-26 01:05:25,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:05:25,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:05:25,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:25,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:05:25,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-11-26 01:05:25,068 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 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) [2022-11-26 01:05:25,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:25,133 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2022-11-26 01:05:25,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:05:25,134 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 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 [2022-11-26 01:05:25,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:25,134 INFO L225 Difference]: With dead ends: 54 [2022-11-26 01:05:25,134 INFO L226 Difference]: Without dead ends: 54 [2022-11-26 01:05:25,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-11-26 01:05:25,135 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 23 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:25,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 35 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:05:25,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-26 01:05:25,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2022-11-26 01:05:25,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 38 states have internal predecessors, (44), 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) [2022-11-26 01:05:25,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2022-11-26 01:05:25,137 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 20 [2022-11-26 01:05:25,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:25,138 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2022-11-26 01:05:25,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 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) [2022-11-26 01:05:25,138 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2022-11-26 01:05:25,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-26 01:05:25,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:25,138 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:05:25,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 01:05:25,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:25,344 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 01:05:25,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:25,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1517112458, now seen corresponding path program 1 times [2022-11-26 01:05:25,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:25,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960413895] [2022-11-26 01:05:25,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:25,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:25,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:05:25,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:25,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960413895] [2022-11-26 01:05:25,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960413895] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:25,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083359128] [2022-11-26 01:05:25,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:25,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:25,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:25,750 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:25,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 01:05:25,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:25,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-26 01:05:25,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:26,016 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:05:26,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 63 [2022-11-26 01:05:26,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:05:26,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:05:26,507 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 [2022-11-26 01:05:26,960 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:05:26,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 103 [2022-11-26 01:05:27,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:05:27,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083359128] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:05:27,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1354745090] [2022-11-26 01:05:27,213 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 01:05:27,213 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:05:27,213 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:05:27,214 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:05:27,214 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:05:27,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-26 01:05:27,244 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 14 treesize of output 10 [2022-11-26 01:05:27,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:27,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 28 treesize of output 23 [2022-11-26 01:05:27,580 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 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-26 01:05:27,801 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:05:30,173 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2541#(and (<= |ULTIMATE.start_strrchr_~c#1| 47) (<= 0 |ULTIMATE.start_strrchr_#res#1.base|) (<= 0 |ULTIMATE.start_strrchr_#in~t#1.base|) (<= |ULTIMATE.start_dirname_~path#1.offset| 0) (<= 0 |ULTIMATE.start_main_~in~0#1.offset|) (<= |ULTIMATE.start_strrchr_#in~t#1.offset| 0) (<= 0 |ULTIMATE.start_dirname_~path#1.offset|) (<= 0 |ULTIMATE.start_strrchr_#in~t#1.offset|) (<= 0 |ULTIMATE.start_dirname_~path#1.base|) (<= 0 |ULTIMATE.start_dirname_~c~0#1.base|) (<= 47 |ULTIMATE.start_strrchr_~c#1|) (<= 0 |ULTIMATE.start_dirname_#in~path#1.base|) (<= 0 |ULTIMATE.start_strrchr_#res#1.offset|) (<= |ULTIMATE.start_main_~in_len~0#1| 2147483647) (<= 0 |ULTIMATE.start_strrchr_~t#1.offset|) (<= 0 |ULTIMATE.start_main_~in~0#1.base|) (<= 0 |ULTIMATE.start_strrchr_~l~0#1.offset|) (<= 0 |ULTIMATE.start_strrchr_~t#1.base|) (= |ULTIMATE.start_strrchr_#in~c#1| 47) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= |ULTIMATE.start_main_~in~0#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_dirname_#in~path#1.offset| 0) (or (not (<= 0 |ULTIMATE.start_dirname_~c~0#1.offset|)) (not (<= (+ |ULTIMATE.start_dirname_~c~0#1.offset| 1) (select |#length| |ULTIMATE.start_dirname_~c~0#1.base|)))) (<= 0 |ULTIMATE.start_strrchr_~l~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_dirname_#in~path#1.offset|) (<= 1 |ULTIMATE.start_main_~in_len~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (= |#NULL.base| 0))' at error location [2022-11-26 01:05:30,173 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:05:30,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:05:30,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 33 [2022-11-26 01:05:30,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423028582] [2022-11-26 01:05:30,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:05:30,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-26 01:05:30,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:30,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-26 01:05:30,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1844, Unknown=0, NotChecked=0, Total=2070 [2022-11-26 01:05:30,176 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 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) [2022-11-26 01:05:34,157 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] [2022-11-26 01:05:37,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:37,741 INFO L93 Difference]: Finished difference Result 128 states and 143 transitions. [2022-11-26 01:05:37,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-26 01:05:37,742 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 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 21 [2022-11-26 01:05:37,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:37,743 INFO L225 Difference]: With dead ends: 128 [2022-11-26 01:05:37,743 INFO L226 Difference]: Without dead ends: 128 [2022-11-26 01:05:37,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2634 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=1681, Invalid=8419, Unknown=0, NotChecked=0, Total=10100 [2022-11-26 01:05:37,746 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 677 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 36 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:37,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [677 Valid, 102 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 542 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-26 01:05:37,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-26 01:05:37,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 44. [2022-11-26 01:05:37,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.275) internal successors, (51), 43 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) [2022-11-26 01:05:37,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-11-26 01:05:37,749 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 21 [2022-11-26 01:05:37,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:37,750 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-11-26 01:05:37,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 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) [2022-11-26 01:05:37,750 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-11-26 01:05:37,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-26 01:05:37,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:37,751 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:05:37,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 01:05:37,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-26 01:05:37,957 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 01:05:37,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:37,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1497136957, now seen corresponding path program 1 times [2022-11-26 01:05:37,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:37,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169746164] [2022-11-26 01:05:37,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:37,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:38,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 01:05:38,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:38,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169746164] [2022-11-26 01:05:38,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169746164] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:05:38,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:05:38,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:05:38,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225935729] [2022-11-26 01:05:38,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:05:38,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:05:38,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:38,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:05:38,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:05:38,029 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 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) [2022-11-26 01:05:38,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:38,073 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2022-11-26 01:05:38,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:05:38,073 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 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 21 [2022-11-26 01:05:38,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:38,075 INFO L225 Difference]: With dead ends: 43 [2022-11-26 01:05:38,075 INFO L226 Difference]: Without dead ends: 43 [2022-11-26 01:05:38,076 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 [2022-11-26 01:05:38,076 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 35 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:38,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 15 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:05:38,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-26 01:05:38,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-26 01:05:38,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 40 states have (on average 1.25) internal successors, (50), 42 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) [2022-11-26 01:05:38,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-11-26 01:05:38,080 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 21 [2022-11-26 01:05:38,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:38,081 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-11-26 01:05:38,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 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) [2022-11-26 01:05:38,081 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-11-26 01:05:38,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-26 01:05:38,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:38,082 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:05:38,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-26 01:05:38,082 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 01:05:38,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:38,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1497136956, now seen corresponding path program 1 times [2022-11-26 01:05:38,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:38,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826156157] [2022-11-26 01:05:38,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:38,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:38,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:05:38,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:38,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826156157] [2022-11-26 01:05:38,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826156157] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:38,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758007932] [2022-11-26 01:05:38,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:38,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:38,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:38,369 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:38,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 01:05:38,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:38,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 01:05:38,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:38,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 01:05:38,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:05:38,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758007932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:05:38,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:05:38,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 15 [2022-11-26 01:05:38,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108003203] [2022-11-26 01:05:38,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:05:38,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:05:38,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:38,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:05:38,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-11-26 01:05:38,516 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 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) [2022-11-26 01:05:38,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:38,583 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-11-26 01:05:38,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:05:38,583 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 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 21 [2022-11-26 01:05:38,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:38,584 INFO L225 Difference]: With dead ends: 57 [2022-11-26 01:05:38,584 INFO L226 Difference]: Without dead ends: 57 [2022-11-26 01:05:38,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-11-26 01:05:38,585 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:38,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 32 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:05:38,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-26 01:05:38,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2022-11-26 01:05:38,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 40 states have (on average 1.225) internal successors, (49), 41 states have internal predecessors, (49), 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) [2022-11-26 01:05:38,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2022-11-26 01:05:38,587 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 21 [2022-11-26 01:05:38,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:38,587 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2022-11-26 01:05:38,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 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) [2022-11-26 01:05:38,587 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2022-11-26 01:05:38,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-26 01:05:38,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:38,588 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:05:38,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 01:05:38,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-26 01:05:38,797 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 01:05:38,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:38,797 INFO L85 PathProgramCache]: Analyzing trace with hash 953951924, now seen corresponding path program 1 times [2022-11-26 01:05:38,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:38,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548966859] [2022-11-26 01:05:38,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:38,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:38,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:39,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:05:39,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:39,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548966859] [2022-11-26 01:05:39,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548966859] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:39,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225681450] [2022-11-26 01:05:39,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:39,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:39,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:39,119 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:39,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 01:05:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:39,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-26 01:05:39,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:39,243 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 01:05:39,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 18 [2022-11-26 01:05:39,280 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 6 treesize of output 5 [2022-11-26 01:05:40,619 INFO L321 Elim1Store]: treesize reduction 42, result has 61.5 percent of original size [2022-11-26 01:05:40,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 104 [2022-11-26 01:05:40,635 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:05:40,636 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 40 treesize of output 42 [2022-11-26 01:05:40,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:05:40,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:05:40,867 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 [2022-11-26 01:05:43,211 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 75 treesize of output 69 [2022-11-26 01:05:43,242 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:05:43,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 119 [2022-11-26 01:05:43,873 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:05:43,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225681450] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:05:43,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [477239091] [2022-11-26 01:05:43,878 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 01:05:43,878 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:05:43,879 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:05:43,879 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:05:43,879 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:05:43,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-26 01:05:43,904 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 14 treesize of output 10 [2022-11-26 01:05:44,339 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:05:46,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [477239091] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:05:46,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:05:46,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11, 16, 16] total 52 [2022-11-26 01:05:46,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216912169] [2022-11-26 01:05:46,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:05:46,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 01:05:46,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:46,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 01:05:46,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=2501, Unknown=0, NotChecked=0, Total=2756 [2022-11-26 01:05:46,683 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 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) [2022-11-26 01:05:49,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:49,392 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2022-11-26 01:05:49,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 01:05:49,393 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 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 22 [2022-11-26 01:05:49,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:49,393 INFO L225 Difference]: With dead ends: 47 [2022-11-26 01:05:49,393 INFO L226 Difference]: Without dead ends: 47 [2022-11-26 01:05:49,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=394, Invalid=3146, Unknown=0, NotChecked=0, Total=3540 [2022-11-26 01:05:49,395 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 54 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:49,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 5 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:05:49,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-26 01:05:49,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2022-11-26 01:05:49,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 40 states have (on average 1.2) internal successors, (48), 41 states have internal predecessors, (48), 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) [2022-11-26 01:05:49,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-11-26 01:05:49,397 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 22 [2022-11-26 01:05:49,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:49,397 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-11-26 01:05:49,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 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) [2022-11-26 01:05:49,398 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-11-26 01:05:49,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-26 01:05:49,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:49,398 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:05:49,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 01:05:49,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:49,604 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 01:05:49,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:49,605 INFO L85 PathProgramCache]: Analyzing trace with hash 833395369, now seen corresponding path program 1 times [2022-11-26 01:05:49,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:49,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44271871] [2022-11-26 01:05:49,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:49,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:49,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:05:49,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:49,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44271871] [2022-11-26 01:05:49,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44271871] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:49,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829835772] [2022-11-26 01:05:49,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:49,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:49,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:49,893 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:49,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 01:05:49,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:49,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-26 01:05:49,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:50,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 01:05:50,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:05:50,252 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 7 treesize of output 5 [2022-11-26 01:05:50,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 01:05:50,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829835772] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:05:50,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [280544830] [2022-11-26 01:05:50,294 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-26 01:05:50,294 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:05:50,294 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:05:50,294 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:05:50,295 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:05:50,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-26 01:05:50,327 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 14 treesize of output 10 [2022-11-26 01:05:50,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:50,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-11-26 01:05:50,835 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 13 treesize of output 9 [2022-11-26 01:05:50,866 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 13 treesize of output 9 [2022-11-26 01:05:50,908 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:05:53,310 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3535#(and (<= |ULTIMATE.start_strrchr_~c#1| 47) (<= 0 |ULTIMATE.start_strrchr_#res#1.base|) (<= 0 |ULTIMATE.start_strrchr_#in~t#1.base|) (<= |ULTIMATE.start_dirname_~path#1.offset| 0) (<= 0 |ULTIMATE.start_main_~in~0#1.offset|) (<= |ULTIMATE.start_strrchr_#in~t#1.offset| 0) (<= 0 |ULTIMATE.start_dirname_~path#1.offset|) (<= 0 |ULTIMATE.start_strrchr_#in~t#1.offset|) (<= 0 |ULTIMATE.start_dirname_~path#1.base|) (<= 0 |ULTIMATE.start_dirname_~c~0#1.base|) (<= 47 |ULTIMATE.start_strrchr_~c#1|) (<= 0 |ULTIMATE.start_dirname_#in~path#1.base|) (<= 0 |ULTIMATE.start_strrchr_#res#1.offset|) (<= |ULTIMATE.start_main_~in_len~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_dirname_~c~0#1.offset| 1)) (<= 0 |ULTIMATE.start_strrchr_~t#1.offset|) (<= 0 |ULTIMATE.start_main_~in~0#1.base|) (<= 0 |ULTIMATE.start_strrchr_~l~0#1.offset|) (<= 0 |ULTIMATE.start_strrchr_~t#1.base|) (= |ULTIMATE.start_strrchr_#in~c#1| 47) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= |ULTIMATE.start_main_~in~0#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_dirname_#in~path#1.offset| 0) (or (not (<= 0 |ULTIMATE.start_dirname_~c~0#1.offset|)) (not (<= (+ |ULTIMATE.start_dirname_~c~0#1.offset| 1) (select |#length| |ULTIMATE.start_dirname_~c~0#1.base|)))) (<= 0 |ULTIMATE.start_strrchr_~l~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_dirname_#in~path#1.offset|) (<= 1 |ULTIMATE.start_main_~in_len~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (= |#NULL.base| 0))' at error location [2022-11-26 01:05:53,310 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:05:53,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:05:53,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 20 [2022-11-26 01:05:53,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981411651] [2022-11-26 01:05:53,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:05:53,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 01:05:53,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:53,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 01:05:53,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2022-11-26 01:05:53,313 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 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) [2022-11-26 01:05:55,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:55,335 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2022-11-26 01:05:55,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-26 01:05:55,335 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 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 22 [2022-11-26 01:05:55,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:55,336 INFO L225 Difference]: With dead ends: 93 [2022-11-26 01:05:55,336 INFO L226 Difference]: Without dead ends: 90 [2022-11-26 01:05:55,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=766, Invalid=3524, Unknown=0, NotChecked=0, Total=4290 [2022-11-26 01:05:55,339 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 331 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:55,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 37 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:05:55,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-26 01:05:55,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 44. [2022-11-26 01:05:55,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 43 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) [2022-11-26 01:05:55,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2022-11-26 01:05:55,342 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 22 [2022-11-26 01:05:55,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:55,342 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2022-11-26 01:05:55,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 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) [2022-11-26 01:05:55,342 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-11-26 01:05:55,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-26 01:05:55,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:55,343 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:05:55,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 01:05:55,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:55,548 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 01:05:55,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:55,549 INFO L85 PathProgramCache]: Analyzing trace with hash -492240622, now seen corresponding path program 1 times [2022-11-26 01:05:55,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:55,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192353891] [2022-11-26 01:05:55,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:55,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:55,863 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:05:55,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:55,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192353891] [2022-11-26 01:05:55,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192353891] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:55,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42304567] [2022-11-26 01:05:55,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:55,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:55,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:55,867 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:55,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 01:05:55,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:55,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-26 01:05:55,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:56,487 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:05:56,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 120 treesize of output 196 [2022-11-26 01:05:56,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:05:56,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:05:56,775 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 [2022-11-26 01:05:58,041 INFO L321 Elim1Store]: treesize reduction 33, result has 85.8 percent of original size [2022-11-26 01:05:58,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 179 treesize of output 321 [2022-11-26 01:05:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:05:58,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42304567] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:05:58,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1810740753] [2022-11-26 01:05:58,346 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-26 01:05:58,346 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:05:58,346 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:05:58,346 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:05:58,346 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:05:58,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-26 01:05:58,371 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 14 treesize of output 10 [2022-11-26 01:05:58,725 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:06:00,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1810740753] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:06:00,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:06:00,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11, 13, 12] total 35 [2022-11-26 01:06:00,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891003971] [2022-11-26 01:06:00,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:06:00,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 01:06:00,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:06:00,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 01:06:00,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=983, Unknown=0, NotChecked=0, Total=1260 [2022-11-26 01:06:00,839 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 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) [2022-11-26 01:06:03,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:06:03,420 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-11-26 01:06:03,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 01:06:03,423 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 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 23 [2022-11-26 01:06:03,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:06:03,424 INFO L225 Difference]: With dead ends: 46 [2022-11-26 01:06:03,424 INFO L226 Difference]: Without dead ends: 46 [2022-11-26 01:06:03,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=454, Invalid=1438, Unknown=0, NotChecked=0, Total=1892 [2022-11-26 01:06:03,425 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 53 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:06:03,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 6 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:06:03,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-26 01:06:03,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2022-11-26 01:06:03,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 43 states have internal predecessors, (49), 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) [2022-11-26 01:06:03,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2022-11-26 01:06:03,428 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 23 [2022-11-26 01:06:03,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:06:03,428 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2022-11-26 01:06:03,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 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) [2022-11-26 01:06:03,428 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2022-11-26 01:06:03,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-26 01:06:03,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:06:03,429 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:06:03,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 01:06:03,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:06:03,635 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 01:06:03,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:06:03,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1495952108, now seen corresponding path program 2 times [2022-11-26 01:06:03,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:06:03,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639989720] [2022-11-26 01:06:03,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:06:03,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:06:03,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:06:04,285 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:06:04,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:06:04,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639989720] [2022-11-26 01:06:04,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639989720] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:06:04,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845770039] [2022-11-26 01:06:04,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:06:04,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:06:04,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:06:04,293 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:06:04,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 01:06:04,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 01:06:04,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:06:04,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-26 01:06:04,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:06:04,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:06:04,439 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 5 treesize of output 3 [2022-11-26 01:06:04,722 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:06:04,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 63 [2022-11-26 01:06:05,061 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 01:06:05,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:06:05,265 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 [2022-11-26 01:06:05,978 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:06:05,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 128 [2022-11-26 01:06:06,476 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 01:06:06,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845770039] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:06:06,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1717006434] [2022-11-26 01:06:06,478 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 01:06:06,478 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:06:06,479 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:06:06,479 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:06:06,479 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:06:06,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-26 01:06:06,512 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 14 treesize of output 10 [2022-11-26 01:06:06,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:06,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 30 treesize of output 23 [2022-11-26 01:06:06,811 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 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-26 01:06:07,021 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:06:09,338 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4221#(and (<= |ULTIMATE.start_strrchr_~c#1| 47) (<= 0 |ULTIMATE.start_strrchr_#res#1.base|) (<= 0 |ULTIMATE.start_strrchr_#in~t#1.base|) (<= |ULTIMATE.start_dirname_~path#1.offset| 0) (<= 0 |ULTIMATE.start_main_~in~0#1.offset|) (<= |ULTIMATE.start_strrchr_#in~t#1.offset| 0) (<= 0 |ULTIMATE.start_dirname_~path#1.offset|) (<= 0 |ULTIMATE.start_strrchr_#in~t#1.offset|) (<= 0 |ULTIMATE.start_dirname_~path#1.base|) (<= 0 |ULTIMATE.start_dirname_~c~0#1.base|) (<= 47 |ULTIMATE.start_strrchr_~c#1|) (<= 0 |ULTIMATE.start_dirname_#in~path#1.base|) (<= 0 |ULTIMATE.start_strrchr_#res#1.offset|) (<= |ULTIMATE.start_main_~in_len~0#1| 2147483647) (<= 0 |ULTIMATE.start_strrchr_~t#1.offset|) (<= 0 |ULTIMATE.start_main_~in~0#1.base|) (<= 0 |ULTIMATE.start_strrchr_~l~0#1.offset|) (<= 0 |ULTIMATE.start_strrchr_~t#1.base|) (= |ULTIMATE.start_strrchr_#in~c#1| 47) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= |ULTIMATE.start_main_~in~0#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_dirname_#in~path#1.offset| 0) (or (not (<= 0 |ULTIMATE.start_dirname_~c~0#1.offset|)) (not (<= (+ |ULTIMATE.start_dirname_~c~0#1.offset| 1) (select |#length| |ULTIMATE.start_dirname_~c~0#1.base|)))) (<= 0 |ULTIMATE.start_strrchr_~l~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_dirname_#in~path#1.offset|) (<= 1 |ULTIMATE.start_main_~in_len~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (= |#NULL.base| 0))' at error location [2022-11-26 01:06:09,338 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:06:09,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:06:09,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 34 [2022-11-26 01:06:09,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105659079] [2022-11-26 01:06:09,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:06:09,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-26 01:06:09,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:06:09,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-26 01:06:09,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=2024, Unknown=0, NotChecked=0, Total=2256 [2022-11-26 01:06:09,341 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 35 states, 34 states have (on average 2.088235294117647) internal successors, (71), 35 states have internal predecessors, (71), 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) [2022-11-26 01:06:13,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:06:13,787 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2022-11-26 01:06:13,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-26 01:06:13,790 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.088235294117647) internal successors, (71), 35 states have internal predecessors, (71), 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 28 [2022-11-26 01:06:13,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:06:13,791 INFO L225 Difference]: With dead ends: 93 [2022-11-26 01:06:13,791 INFO L226 Difference]: Without dead ends: 93 [2022-11-26 01:06:13,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2032 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1441, Invalid=6749, Unknown=0, NotChecked=0, Total=8190 [2022-11-26 01:06:13,795 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 435 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 01:06:13,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 124 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 01:06:13,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-26 01:06:13,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 39. [2022-11-26 01:06:13,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 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) [2022-11-26 01:06:13,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-11-26 01:06:13,798 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 28 [2022-11-26 01:06:13,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:06:13,798 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-11-26 01:06:13,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.088235294117647) internal successors, (71), 35 states have internal predecessors, (71), 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) [2022-11-26 01:06:13,798 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-11-26 01:06:13,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-26 01:06:13,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:06:13,799 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:06:13,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 01:06:14,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-26 01:06:14,005 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 01:06:14,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:06:14,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1802894354, now seen corresponding path program 2 times [2022-11-26 01:06:14,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:06:14,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968165812] [2022-11-26 01:06:14,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:06:14,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:06:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:06:14,562 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:06:14,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:06:14,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968165812] [2022-11-26 01:06:14,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968165812] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:06:14,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666590399] [2022-11-26 01:06:14,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:06:14,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:06:14,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:06:14,567 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:06:14,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 01:06:14,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 01:06:14,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:06:14,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-26 01:06:14,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:06:15,595 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:06:15,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 81 [2022-11-26 01:06:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:06:15,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:06:17,236 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:06:17,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 124 treesize of output 277 [2022-11-26 01:07:06,885 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:07:06,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666590399] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:07:06,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1345652153] [2022-11-26 01:07:06,887 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-26 01:07:06,887 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:07:06,887 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:07:06,887 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:07:06,888 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:07:06,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-26 01:07:06,918 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 14 treesize of output 10 [2022-11-26 01:07:07,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:07,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-11-26 01:07:07,371 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 13 treesize of output 9 [2022-11-26 01:07:07,411 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 13 treesize of output 9 [2022-11-26 01:07:07,441 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:07:10,438 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4660#(and (<= |ULTIMATE.start_strrchr_~c#1| 47) (<= 0 |ULTIMATE.start_strrchr_#res#1.base|) (<= 0 |ULTIMATE.start_strrchr_#in~t#1.base|) (<= |ULTIMATE.start_dirname_~path#1.offset| 0) (<= 0 |ULTIMATE.start_main_~in~0#1.offset|) (<= |ULTIMATE.start_strrchr_#in~t#1.offset| 0) (<= 0 |ULTIMATE.start_dirname_~path#1.offset|) (<= 0 |ULTIMATE.start_strrchr_#in~t#1.offset|) (<= 0 |ULTIMATE.start_dirname_~path#1.base|) (<= 0 |ULTIMATE.start_dirname_~c~0#1.base|) (<= 47 |ULTIMATE.start_strrchr_~c#1|) (<= 0 |ULTIMATE.start_dirname_#in~path#1.base|) (<= 0 |ULTIMATE.start_strrchr_#res#1.offset|) (<= |ULTIMATE.start_main_~in_len~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_dirname_~c~0#1.offset| 1)) (<= 0 |ULTIMATE.start_strrchr_~t#1.offset|) (<= 0 |ULTIMATE.start_main_~in~0#1.base|) (<= 0 |ULTIMATE.start_strrchr_~l~0#1.offset|) (<= 0 |ULTIMATE.start_strrchr_~t#1.base|) (= |ULTIMATE.start_strrchr_#in~c#1| 47) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= |ULTIMATE.start_main_~in~0#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_dirname_#in~path#1.offset| 0) (or (not (<= 0 |ULTIMATE.start_dirname_~c~0#1.offset|)) (not (<= (+ |ULTIMATE.start_dirname_~c~0#1.offset| 1) (select |#length| |ULTIMATE.start_dirname_~c~0#1.base|)))) (<= 0 |ULTIMATE.start_strrchr_~l~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_dirname_#in~path#1.offset|) (<= 1 |ULTIMATE.start_main_~in_len~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (= |#NULL.base| 0))' at error location [2022-11-26 01:07:10,438 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:07:10,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:07:10,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 40 [2022-11-26 01:07:10,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414767119] [2022-11-26 01:07:10,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:07:10,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-26 01:07:10,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:07:10,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-26 01:07:10,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=2632, Unknown=0, NotChecked=0, Total=2862 [2022-11-26 01:07:10,441 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 40 states, 40 states have (on average 1.825) internal successors, (73), 40 states have internal predecessors, (73), 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) [2022-11-26 01:07:32,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:07:32,112 INFO L93 Difference]: Finished difference Result 144 states and 160 transitions. [2022-11-26 01:07:32,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-26 01:07:32,113 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 40 states have internal predecessors, (73), 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 29 [2022-11-26 01:07:32,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:07:32,114 INFO L225 Difference]: With dead ends: 144 [2022-11-26 01:07:32,114 INFO L226 Difference]: Without dead ends: 62 [2022-11-26 01:07:32,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3668 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=1835, Invalid=12685, Unknown=0, NotChecked=0, Total=14520 [2022-11-26 01:07:32,118 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 513 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 1606 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:07:32,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 265 Invalid, 1660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1606 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-26 01:07:32,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-26 01:07:32,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 43. [2022-11-26 01:07:32,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 states have internal predecessors, (47), 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) [2022-11-26 01:07:32,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-11-26 01:07:32,120 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 29 [2022-11-26 01:07:32,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:07:32,121 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-11-26 01:07:32,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 40 states have internal predecessors, (73), 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) [2022-11-26 01:07:32,121 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-11-26 01:07:32,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-26 01:07:32,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:07:32,122 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:07:32,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 01:07:32,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:32,328 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 01:07:32,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:07:32,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1072241087, now seen corresponding path program 3 times [2022-11-26 01:07:32,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:07:32,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438509810] [2022-11-26 01:07:32,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:32,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:07:32,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 01:07:32,365 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-26 01:07:32,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 01:07:32,429 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-26 01:07:32,432 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-26 01:07:32,433 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 19 remaining) [2022-11-26 01:07:32,434 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 19 remaining) [2022-11-26 01:07:32,435 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 19 remaining) [2022-11-26 01:07:32,435 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 19 remaining) [2022-11-26 01:07:32,435 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 19 remaining) [2022-11-26 01:07:32,435 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 19 remaining) [2022-11-26 01:07:32,436 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 19 remaining) [2022-11-26 01:07:32,436 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 19 remaining) [2022-11-26 01:07:32,436 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 19 remaining) [2022-11-26 01:07:32,436 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 19 remaining) [2022-11-26 01:07:32,436 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 19 remaining) [2022-11-26 01:07:32,437 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 19 remaining) [2022-11-26 01:07:32,437 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 19 remaining) [2022-11-26 01:07:32,437 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 19 remaining) [2022-11-26 01:07:32,437 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 19 remaining) [2022-11-26 01:07:32,438 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 19 remaining) [2022-11-26 01:07:32,438 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 19 remaining) [2022-11-26 01:07:32,438 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 19 remaining) [2022-11-26 01:07:32,438 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK (0 of 19 remaining) [2022-11-26 01:07:32,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-26 01:07:32,442 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:07:32,446 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-26 01:07:32,508 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-26 01:07:32,514 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state \old(c)=47, c=47, ch=47, l={0:0}, t={5:0}, t={5:0} [2022-11-26 01:07:32,514 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state \old(c)=47, c=47, ch=47, l={5:0}, t={5:0}, t={5:1} [2022-11-26 01:07:32,515 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state \old(c)=47, c=47, ch=47, l={5:1}, t={5:0}, t={5:2} [2022-11-26 01:07:32,515 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state \old(c)=47, c=47, ch=47, l={5:1}, t={5:0}, t={5:3} [2022-11-26 01:07:32,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 01:07:32 BoogieIcfgContainer [2022-11-26 01:07:32,523 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-26 01:07:32,524 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-26 01:07:32,524 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-26 01:07:32,524 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-26 01:07:32,525 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:04:44" (3/4) ... [2022-11-26 01:07:32,527 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-26 01:07:32,544 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-26 01:07:32,547 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state \old(c)=47, c=47, ch=47, l={0:0}, t={5:0}, t={5:0} [2022-11-26 01:07:32,547 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state \old(c)=47, c=47, ch=47, l={5:0}, t={5:1}, t={5:0} [2022-11-26 01:07:32,547 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state \old(c)=47, c=47, ch=47, l={5:1}, t={5:2}, t={5:0} [2022-11-26 01:07:32,547 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state \old(c)=47, c=47, ch=47, l={5:1}, t={5:3}, t={5:0} [2022-11-26 01:07:32,575 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/witness.graphml [2022-11-26 01:07:32,575 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-26 01:07:32,577 INFO L158 Benchmark]: Toolchain (without parser) took 169607.06ms. Allocated memory was 172.0MB in the beginning and 302.0MB in the end (delta: 130.0MB). Free memory was 130.6MB in the beginning and 248.4MB in the end (delta: -117.8MB). Peak memory consumption was 15.3MB. Max. memory is 16.1GB. [2022-11-26 01:07:32,577 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 123.7MB. Free memory is still 100.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 01:07:32,578 INFO L158 Benchmark]: CACSL2BoogieTranslator took 538.57ms. Allocated memory is still 172.0MB. Free memory was 130.0MB in the beginning and 113.9MB in the end (delta: 16.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-26 01:07:32,578 INFO L158 Benchmark]: Boogie Procedure Inliner took 65.69ms. Allocated memory is still 172.0MB. Free memory was 113.9MB in the beginning and 111.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 01:07:32,578 INFO L158 Benchmark]: Boogie Preprocessor took 29.13ms. Allocated memory is still 172.0MB. Free memory was 111.7MB in the beginning and 110.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 01:07:32,578 INFO L158 Benchmark]: RCFGBuilder took 605.85ms. Allocated memory is still 172.0MB. Free memory was 110.2MB in the beginning and 93.4MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-26 01:07:32,582 INFO L158 Benchmark]: TraceAbstraction took 168304.89ms. Allocated memory was 172.0MB in the beginning and 302.0MB in the end (delta: 130.0MB). Free memory was 92.8MB in the beginning and 252.6MB in the end (delta: -159.8MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 01:07:32,582 INFO L158 Benchmark]: Witness Printer took 51.90ms. Allocated memory is still 302.0MB. Free memory was 252.6MB in the beginning and 248.4MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-26 01:07:32,583 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 123.7MB. Free memory is still 100.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 538.57ms. Allocated memory is still 172.0MB. Free memory was 130.0MB in the beginning and 113.9MB in the end (delta: 16.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 65.69ms. Allocated memory is still 172.0MB. Free memory was 113.9MB in the beginning and 111.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.13ms. Allocated memory is still 172.0MB. Free memory was 111.7MB in the beginning and 110.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 605.85ms. Allocated memory is still 172.0MB. Free memory was 110.2MB in the beginning and 93.4MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 168304.89ms. Allocated memory was 172.0MB in the beginning and 302.0MB in the end (delta: 130.0MB). Free memory was 92.8MB in the beginning and 252.6MB in the end (delta: -159.8MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 51.90ms. Allocated memory is still 302.0MB. Free memory was 252.6MB in the beginning and 248.4MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. 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 - CounterExampleResult [Line: -1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L533] int in_len = __VERIFIER_nondet_int(); [L534] COND FALSE !(in_len < 1) [L535] char* in = __builtin_alloca (in_len); VAL [__builtin_alloca (in_len)={5:0}, in={5:0}, in_len=7] [L536] in[in_len-1]=0 [L537] CALL dirname(in) [L517] char *c; VAL [path={5:0}, path={5:0}] [L518] COND FALSE !(path == ((void *)0)) VAL [path={5:0}, path={5:0}] [L520] CALL, EXPR strrchr(path,'/') [L507] register char ch; [L508] register const char *l=0; [L509] ch = c VAL [\old(c)=47, c=47, ch=47, l={0:0}, t={5:0}, t={5:0}] [L511] EXPR \read(*t) [L511] COND TRUE *t == ch [L511] l=t VAL [\old(c)=47, c=47, ch=47, l={5:0}, t={5:0}, t={5:0}] [L511] EXPR \read(*t) VAL [\old(c)=47, \read(*t)=47, c=47, ch=47, l={5:0}, t={5:0}, t={5:0}] [L511] COND FALSE !(!*t) [L511] ++t VAL [\old(c)=47, c=47, ch=47, l={5:0}, t={5:1}, t={5:0}] [L511] EXPR \read(*t) [L511] COND TRUE *t == ch [L511] l=t VAL [\old(c)=47, c=47, ch=47, l={5:1}, t={5:1}, t={5:0}] [L511] EXPR \read(*t) VAL [\old(c)=47, \read(*t)=47, c=47, ch=47, l={5:1}, t={5:1}, t={5:0}] [L511] COND FALSE !(!*t) [L511] ++t VAL [\old(c)=47, c=47, ch=47, l={5:1}, t={5:0}, t={5:2}] [L511] EXPR \read(*t) [L511] COND FALSE !(*t == ch) [L511] EXPR \read(*t) VAL [\old(c)=47, \read(*t)=48, c=47, ch=47, l={5:1}, t={5:0}, t={5:2}] [L511] COND FALSE !(!*t) [L511] ++t VAL [\old(c)=47, c=47, ch=47, l={5:1}, t={5:0}, t={5:3}] [L511] EXPR \read(*t) [L511] COND FALSE !(*t == ch) [L511] EXPR \read(*t) VAL [\old(c)=47, \read(*t)=0, c=47, ch=47, l={5:1}, t={5:0}, t={5:3}] [L511] COND TRUE !*t [L511] return (char*)l; VAL [\old(c)=47, \result={5:1}, c=47, ch=47, l={5:1}, t={5:0}, t={5:3}] [L520] RET, EXPR strrchr(path,'/') [L520] EXPR c=strrchr(path,'/') VAL [c={5:1}, path={5:0}, path={5:0}, strrchr(path,'/')={5:1}] [L520] COND FALSE !(!(c=strrchr(path,'/'))) [L521] EXPR c[1] VAL [c={5:1}, c[1]=48, path={5:0}, path={5:0}] [L521] COND FALSE !(c[1]==(char)0 && c!=path) [L525] COND TRUE c!=path VAL [c={5:1}, path={5:0}, path={5:0}] [L526] EXPR \read(*c) VAL [\read(*c)=47, c={5:1}, path={5:0}, path={5:0}] [L526] COND TRUE *c=='/' && c>=path [L526] EXPR c-- VAL [c={5:0}, c--={5:1}, path={5:0}, path={5:0}] [L526] *c--=(char)0 [L526] EXPR \read(*c) VAL [\read(*c)=47, c={5:0}, path={5:0}, path={5:0}] [L526] COND TRUE *c=='/' && c>=path [L526] EXPR c-- VAL [c={5:-1}, c--={5:0}, path={5:0}, path={5:0}] [L526] *c--=(char)0 [L526] \read(*c) - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 44 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 168.1s, OverallIterations: 24, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 55.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 5737 SdHoareTripleChecker+Valid, 10.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5737 mSDsluCounter, 1394 SdHoareTripleChecker+Invalid, 10.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1014 mSDsCounter, 310 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5576 IncrementalHoareTripleChecker+Invalid, 5888 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 310 mSolverCounterUnsat, 380 mSDtfsCounter, 5576 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1129 GetRequests, 374 SyntacticMatches, 25 SemanticMatches, 730 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13024 ImplicationChecksByTransitivity, 74.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=11, InterpolantAutomatonStates: 372, 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, 23 MinimizatonAttempts, 536 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 82.0s InterpolantComputationTime, 654 NumberOfCodeBlocks, 654 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 778 ConstructedInterpolants, 106 QuantifiedInterpolants, 13696 SizeOfPredicates, 230 NumberOfNonLiveVariables, 1721 ConjunctsInSsa, 473 ConjunctsInUnsatCore, 46 InterpolantComputations, 13 PerfectInterpolantSequences, 51/290 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.8s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 31, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 51, TOOLS_POST_TIME: 0.6s, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 51, TOOLS_QUANTIFIERELIM_TIME: 0.6s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 94, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 6, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 4, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 31, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME: 0.2s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.2s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 4, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 363, DAG_COMPRESSION_RETAINED_NODES: 86, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-26 01:07:32,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2d33c3e-21a9-436c-910b-c25f35976948/bin/utaipan-ByfvJB40ur/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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)