./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrpbrk-alloca-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrpbrk-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh --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 dab3cfcd7f834fcfbdfecec143b1f55491432e66d7189ec50c725339851d6e17 --- 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-2329fc7 [2022-12-14 06:36:09,078 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:36:09,079 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:36:09,096 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:36:09,097 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:36:09,098 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:36:09,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:36:09,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:36:09,102 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:36:09,103 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:36:09,104 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:36:09,105 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:36:09,105 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:36:09,106 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:36:09,107 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:36:09,109 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:36:09,109 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:36:09,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:36:09,112 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:36:09,114 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:36:09,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:36:09,117 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:36:09,118 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:36:09,119 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:36:09,122 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:36:09,123 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:36:09,123 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:36:09,124 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:36:09,124 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:36:09,125 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:36:09,125 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:36:09,126 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:36:09,127 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:36:09,128 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:36:09,128 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:36:09,129 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:36:09,129 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:36:09,130 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:36:09,130 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:36:09,130 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:36:09,131 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:36:09,132 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2022-12-14 06:36:09,147 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:36:09,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:36:09,147 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:36:09,148 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:36:09,148 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:36:09,148 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:36:09,148 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:36:09,148 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:36:09,148 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:36:09,149 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:36:09,149 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:36:09,149 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:36:09,149 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:36:09,149 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:36:09,149 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:36:09,149 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:36:09,149 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:36:09,149 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:36:09,150 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 06:36:09,150 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 06:36:09,150 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:36:09,150 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 06:36:09,150 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:36:09,151 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:36:09,151 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 06:36:09,151 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 06:36:09,151 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 06:36:09,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:36:09,151 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 06:36:09,151 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:36:09,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:36:09,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:36:09,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:36:09,152 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:36:09,152 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:36:09,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:36:09,152 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:36:09,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:36:09,152 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:36:09,153 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_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dab3cfcd7f834fcfbdfecec143b1f55491432e66d7189ec50c725339851d6e17 [2022-12-14 06:36:09,308 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:36:09,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:36:09,325 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:36:09,326 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:36:09,327 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:36:09,327 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrpbrk-alloca-1.i [2022-12-14 06:36:11,865 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:36:12,010 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:36:12,011 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/sv-benchmarks/c/termination-memory-alloca/openbsd_cstrpbrk-alloca-1.i [2022-12-14 06:36:12,020 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/data/c14942478/d73829a5890d404a981dc58c04d9daf2/FLAG714f77ae3 [2022-12-14 06:36:12,032 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/data/c14942478/d73829a5890d404a981dc58c04d9daf2 [2022-12-14 06:36:12,034 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:36:12,035 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:36:12,036 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:36:12,037 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:36:12,040 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:36:12,040 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:36:12" (1/1) ... [2022-12-14 06:36:12,041 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48bf72e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:12, skipping insertion in model container [2022-12-14 06:36:12,041 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:36:12" (1/1) ... [2022-12-14 06:36:12,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:36:12,067 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:36:12,225 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:36:12,233 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:36:12,259 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:36:12,274 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:36:12,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:12 WrapperNode [2022-12-14 06:36:12,275 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:36:12,275 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:36:12,275 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:36:12,276 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:36:12,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:12" (1/1) ... [2022-12-14 06:36:12,288 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:12" (1/1) ... [2022-12-14 06:36:12,302 INFO L138 Inliner]: procedures = 111, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2022-12-14 06:36:12,302 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:36:12,303 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:36:12,303 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:36:12,303 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:36:12,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:12" (1/1) ... [2022-12-14 06:36:12,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:12" (1/1) ... [2022-12-14 06:36:12,311 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:12" (1/1) ... [2022-12-14 06:36:12,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:12" (1/1) ... [2022-12-14 06:36:12,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:12" (1/1) ... [2022-12-14 06:36:12,317 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:12" (1/1) ... [2022-12-14 06:36:12,318 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:12" (1/1) ... [2022-12-14 06:36:12,319 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:12" (1/1) ... [2022-12-14 06:36:12,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:36:12,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:36:12,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:36:12,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:36:12,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:12" (1/1) ... [2022-12-14 06:36:12,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:36:12,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:36:12,346 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:36:12,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:36:12,381 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 06:36:12,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 06:36:12,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 06:36:12,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 06:36:12,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:36:12,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:36:12,462 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:36:12,464 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:36:12,591 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:36:12,625 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:36:12,626 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 06:36:12,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:36:12 BoogieIcfgContainer [2022-12-14 06:36:12,628 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:36:12,629 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:36:12,629 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:36:12,632 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:36:12,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:36:12" (1/3) ... [2022-12-14 06:36:12,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e869fb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:36:12, skipping insertion in model container [2022-12-14 06:36:12,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:12" (2/3) ... [2022-12-14 06:36:12,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e869fb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:36:12, skipping insertion in model container [2022-12-14 06:36:12,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:36:12" (3/3) ... [2022-12-14 06:36:12,634 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrpbrk-alloca-1.i [2022-12-14 06:36:12,648 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:36:12,649 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2022-12-14 06:36:12,681 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:36:12,686 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;@2c942f8e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:36:12,686 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-12-14 06:36:12,689 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 2.076923076923077) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:36:12,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 06:36:12,701 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:12,702 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 06:36:12,702 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 06:36:12,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:12,707 INFO L85 PathProgramCache]: Analyzing trace with hash 3396, now seen corresponding path program 1 times [2022-12-14 06:36:12,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:12,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943074948] [2022-12-14 06:36:12,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:12,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:12,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:12,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:36:12,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:12,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943074948] [2022-12-14 06:36:12,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943074948] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:36:12,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:36:12,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 06:36:12,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466569437] [2022-12-14 06:36:12,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:36:12,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:36:12,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:13,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:36:13,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:36:13,003 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 2.076923076923077) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-12-14 06:36:13,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:13,036 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-12-14 06:36:13,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:36:13,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-12-14 06:36:13,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:13,043 INFO L225 Difference]: With dead ends: 22 [2022-12-14 06:36:13,044 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 06:36:13,045 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 [2022-12-14 06:36:13,047 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:13,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 13 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:36:13,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 06:36:13,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-12-14 06:36:13,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:36:13,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-12-14 06:36:13,068 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 2 [2022-12-14 06:36:13,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:13,068 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-12-14 06:36:13,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-12-14 06:36:13,068 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-12-14 06:36:13,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 06:36:13,068 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:13,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 06:36:13,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 06:36:13,069 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 06:36:13,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:13,069 INFO L85 PathProgramCache]: Analyzing trace with hash 3397, now seen corresponding path program 1 times [2022-12-14 06:36:13,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:13,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931999580] [2022-12-14 06:36:13,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:13,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:13,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:13,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:36:13,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:13,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931999580] [2022-12-14 06:36:13,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931999580] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:36:13,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:36:13,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 06:36:13,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511175545] [2022-12-14 06:36:13,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:36:13,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:36:13,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:13,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:36:13,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:36:13,242 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-12-14 06:36:13,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:13,260 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2022-12-14 06:36:13,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:36:13,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-12-14 06:36:13,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:13,260 INFO L225 Difference]: With dead ends: 20 [2022-12-14 06:36:13,260 INFO L226 Difference]: Without dead ends: 20 [2022-12-14 06:36:13,261 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 [2022-12-14 06:36:13,261 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:13,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 14 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:36:13,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-14 06:36:13,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-12-14 06:36:13,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:36:13,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-12-14 06:36:13,264 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 2 [2022-12-14 06:36:13,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:13,264 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-12-14 06:36:13,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-12-14 06:36:13,264 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-12-14 06:36:13,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 06:36:13,264 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:13,264 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 06:36:13,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 06:36:13,265 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 06:36:13,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:13,265 INFO L85 PathProgramCache]: Analyzing trace with hash 105265, now seen corresponding path program 1 times [2022-12-14 06:36:13,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:13,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586151924] [2022-12-14 06:36:13,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:13,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:13,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:13,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:36:13,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:13,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586151924] [2022-12-14 06:36:13,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586151924] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:36:13,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:36:13,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 06:36:13,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171804869] [2022-12-14 06:36:13,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:36:13,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:36:13,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:13,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:36:13,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:36:13,300 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. 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) [2022-12-14 06:36:13,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:13,317 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-12-14 06:36:13,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:36:13,317 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 [2022-12-14 06:36:13,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:13,318 INFO L225 Difference]: With dead ends: 19 [2022-12-14 06:36:13,318 INFO L226 Difference]: Without dead ends: 19 [2022-12-14 06:36:13,318 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 [2022-12-14 06:36:13,319 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:13,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 12 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:36:13,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-12-14 06:36:13,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-12-14 06:36:13,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:36:13,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-12-14 06:36:13,327 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 3 [2022-12-14 06:36:13,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:13,327 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-12-14 06:36:13,327 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) [2022-12-14 06:36:13,327 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-12-14 06:36:13,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 06:36:13,327 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:13,328 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 06:36:13,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 06:36:13,328 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 06:36:13,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:13,328 INFO L85 PathProgramCache]: Analyzing trace with hash 105266, now seen corresponding path program 1 times [2022-12-14 06:36:13,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:13,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129682610] [2022-12-14 06:36:13,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:13,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:13,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:36:13,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:13,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129682610] [2022-12-14 06:36:13,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129682610] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:36:13,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:36:13,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:36:13,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002571312] [2022-12-14 06:36:13,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:36:13,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:36:13,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:13,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:36:13,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:36:13,467 INFO L87 Difference]: Start difference. First operand 19 states and 21 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) [2022-12-14 06:36:13,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:13,483 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2022-12-14 06:36:13,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:36:13,484 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 [2022-12-14 06:36:13,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:13,484 INFO L225 Difference]: With dead ends: 18 [2022-12-14 06:36:13,484 INFO L226 Difference]: Without dead ends: 18 [2022-12-14 06:36:13,485 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 [2022-12-14 06:36:13,485 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:13,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 13 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:36:13,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-12-14 06:36:13,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-12-14 06:36:13,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:36:13,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-12-14 06:36:13,488 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 3 [2022-12-14 06:36:13,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:13,488 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-12-14 06:36:13,488 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) [2022-12-14 06:36:13,488 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-12-14 06:36:13,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 06:36:13,489 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:13,489 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 06:36:13,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 06:36:13,489 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 06:36:13,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:13,489 INFO L85 PathProgramCache]: Analyzing trace with hash 101208581, now seen corresponding path program 1 times [2022-12-14 06:36:13,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:13,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136077186] [2022-12-14 06:36:13,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:13,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:13,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:13,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:36:13,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:13,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136077186] [2022-12-14 06:36:13,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136077186] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:36:13,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:36:13,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:36:13,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672740928] [2022-12-14 06:36:13,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:36:13,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:36:13,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:13,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:36:13,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:36:13,539 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:36:13,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:13,580 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2022-12-14 06:36:13,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:36:13,581 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 06:36:13,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:13,581 INFO L225 Difference]: With dead ends: 17 [2022-12-14 06:36:13,581 INFO L226 Difference]: Without dead ends: 17 [2022-12-14 06:36:13,582 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 [2022-12-14 06:36:13,583 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 30 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:13,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 15 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:36:13,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-14 06:36:13,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-12-14 06:36:13,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:36:13,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-12-14 06:36:13,585 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 5 [2022-12-14 06:36:13,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:13,586 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-12-14 06:36:13,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:36:13,586 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-12-14 06:36:13,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 06:36:13,586 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:13,586 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 06:36:13,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 06:36:13,587 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 06:36:13,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:13,587 INFO L85 PathProgramCache]: Analyzing trace with hash 101208582, now seen corresponding path program 1 times [2022-12-14 06:36:13,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:13,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789764227] [2022-12-14 06:36:13,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:13,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:13,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:13,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:36:13,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:13,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789764227] [2022-12-14 06:36:13,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789764227] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:36:13,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:36:13,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:36:13,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658968287] [2022-12-14 06:36:13,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:36:13,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:36:13,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:13,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:36:13,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:36:13,681 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:36:13,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:13,730 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-12-14 06:36:13,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:36:13,731 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 06:36:13,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:13,731 INFO L225 Difference]: With dead ends: 19 [2022-12-14 06:36:13,731 INFO L226 Difference]: Without dead ends: 19 [2022-12-14 06:36:13,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-14 06:36:13,732 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:13,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 30 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:36:13,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-12-14 06:36:13,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-12-14 06:36:13,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.4) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:36:13,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-12-14 06:36:13,735 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 5 [2022-12-14 06:36:13,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:13,736 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-12-14 06:36:13,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:36:13,736 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-12-14 06:36:13,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 06:36:13,736 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:13,736 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:36:13,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 06:36:13,737 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 06:36:13,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:13,737 INFO L85 PathProgramCache]: Analyzing trace with hash 39022297, now seen corresponding path program 1 times [2022-12-14 06:36:13,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:13,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73085910] [2022-12-14 06:36:13,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:13,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:13,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:36:13,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:13,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73085910] [2022-12-14 06:36:13,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73085910] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:36:13,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:36:13,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:36:13,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730348799] [2022-12-14 06:36:13,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:36:13,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:36:13,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:13,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:36:13,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:36:13,803 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:36:13,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:13,845 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-12-14 06:36:13,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:36:13,846 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 06:36:13,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:13,846 INFO L225 Difference]: With dead ends: 21 [2022-12-14 06:36:13,846 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 06:36:13,847 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 [2022-12-14 06:36:13,847 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 24 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:13,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 25 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:36:13,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 06:36:13,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2022-12-14 06:36:13,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:36:13,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-12-14 06:36:13,850 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 8 [2022-12-14 06:36:13,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:13,851 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-12-14 06:36:13,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:36:13,851 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-12-14 06:36:13,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 06:36:13,851 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:13,852 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:36:13,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 06:36:13,852 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 06:36:13,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:13,852 INFO L85 PathProgramCache]: Analyzing trace with hash 39022298, now seen corresponding path program 1 times [2022-12-14 06:36:13,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:13,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259097238] [2022-12-14 06:36:13,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:13,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:13,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:13,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:36:13,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:13,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259097238] [2022-12-14 06:36:13,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259097238] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:36:13,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:36:13,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:36:13,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454090627] [2022-12-14 06:36:13,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:36:13,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:36:13,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:13,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:36:13,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:36:13,965 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:36:14,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:14,015 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-12-14 06:36:14,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:36:14,016 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 06:36:14,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:14,016 INFO L225 Difference]: With dead ends: 21 [2022-12-14 06:36:14,016 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 06:36:14,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-14 06:36:14,017 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:14,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 26 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:36:14,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 06:36:14,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-12-14 06:36:14,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:36:14,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-12-14 06:36:14,019 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 8 [2022-12-14 06:36:14,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:14,019 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-12-14 06:36:14,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:36:14,020 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-12-14 06:36:14,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 06:36:14,020 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:14,020 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:36:14,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 06:36:14,020 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 06:36:14,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:14,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1209653515, now seen corresponding path program 1 times [2022-12-14 06:36:14,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:14,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387860929] [2022-12-14 06:36:14,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:14,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:14,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:14,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:36:14,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:14,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387860929] [2022-12-14 06:36:14,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387860929] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:36:14,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:36:14,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:36:14,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124674533] [2022-12-14 06:36:14,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:36:14,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:36:14,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:14,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:36:14,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:36:14,126 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:36:14,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:14,139 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-12-14 06:36:14,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:36:14,140 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 06:36:14,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:14,140 INFO L225 Difference]: With dead ends: 19 [2022-12-14 06:36:14,140 INFO L226 Difference]: Without dead ends: 16 [2022-12-14 06:36:14,141 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 [2022-12-14 06:36:14,141 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:14,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 22 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:36:14,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-12-14 06:36:14,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-12-14 06:36:14,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 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) [2022-12-14 06:36:14,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-12-14 06:36:14,144 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 9 [2022-12-14 06:36:14,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:14,144 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-12-14 06:36:14,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:36:14,144 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-12-14 06:36:14,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 06:36:14,144 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:14,145 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:36:14,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 06:36:14,145 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 06:36:14,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:14,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1421977316, now seen corresponding path program 1 times [2022-12-14 06:36:14,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:14,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840144855] [2022-12-14 06:36:14,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:14,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:14,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:36:14,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:14,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840144855] [2022-12-14 06:36:14,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840144855] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:36:14,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724594400] [2022-12-14 06:36:14,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:14,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:36:14,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:36:14,451 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:36:14,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:36:14,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:14,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-14 06:36:14,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:36:14,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 06:36:14,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 06:36:14,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 06:36:14,764 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:36:14,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 15 [2022-12-14 06:36:14,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:36:14,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:36:15,070 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:36:15,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-12-14 06:36:15,081 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:36:15,082 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 33 treesize of output 30 [2022-12-14 06:36:15,086 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 [2022-12-14 06:36:15,093 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 [2022-12-14 06:36:15,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:36:15,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724594400] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:36:15,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2074295648] [2022-12-14 06:36:15,149 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 06:36:15,149 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:36:15,153 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:36:15,158 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:36:15,159 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:36:15,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:15,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 06:36:15,240 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 [2022-12-14 06:36:15,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:15,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 06:36:15,640 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:36:16,754 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '510#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrpbrk_#t~post2#1.base|) (+ |ULTIMATE.start_cstrpbrk_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post2#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 06:36:16,754 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:36:16,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:36:16,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2022-12-14 06:36:16,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94498330] [2022-12-14 06:36:16,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:36:16,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 06:36:16,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:16,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 06:36:16,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2022-12-14 06:36:16,755 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 23 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:36:17,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:17,154 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2022-12-14 06:36:17,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 06:36:17,154 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 06:36:17,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:17,154 INFO L225 Difference]: With dead ends: 27 [2022-12-14 06:36:17,154 INFO L226 Difference]: Without dead ends: 27 [2022-12-14 06:36:17,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=217, Invalid=1343, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 06:36:17,155 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 82 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:17,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 36 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:36:17,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-14 06:36:17,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-12-14 06:36:17,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 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) [2022-12-14 06:36:17,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-12-14 06:36:17,158 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 11 [2022-12-14 06:36:17,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:17,159 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-12-14 06:36:17,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:36:17,159 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-12-14 06:36:17,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 06:36:17,159 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:17,160 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:36:17,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:36:17,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 06:36:17,360 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 06:36:17,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:17,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1131537954, now seen corresponding path program 1 times [2022-12-14 06:36:17,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:17,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160353496] [2022-12-14 06:36:17,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:17,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:17,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:17,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:36:17,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:17,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160353496] [2022-12-14 06:36:17,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160353496] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:36:17,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590311497] [2022-12-14 06:36:17,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:17,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:36:17,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:36:17,624 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:36:17,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:36:17,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:17,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-14 06:36:17,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:36:17,695 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 [2022-12-14 06:36:17,826 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:36:17,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 15 [2022-12-14 06:36:17,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:36:17,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:36:18,064 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 [2022-12-14 06:36:18,068 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 [2022-12-14 06:36:18,073 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 14 treesize of output 12 [2022-12-14 06:36:18,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:36:18,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590311497] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:36:18,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [490656501] [2022-12-14 06:36:18,086 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 06:36:18,086 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:36:18,086 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:36:18,086 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:36:18,086 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:36:18,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:18,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 06:36:18,130 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 [2022-12-14 06:36:18,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:18,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 06:36:18,536 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:36:20,084 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '675#(and (<= 0 |ULTIMATE.start_cstrpbrk_~scanp~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrpbrk_~scanp~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 1) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrpbrk_#t~post4#1.base|) (+ |ULTIMATE.start_cstrpbrk_#t~post4#1.offset| 1)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post4#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 06:36:20,084 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:36:20,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:36:20,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2022-12-14 06:36:20,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341920066] [2022-12-14 06:36:20,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:36:20,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 06:36:20,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:20,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 06:36:20,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2022-12-14 06:36:20,086 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:36:20,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:20,493 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-12-14 06:36:20,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 06:36:20,493 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 06:36:20,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:20,494 INFO L225 Difference]: With dead ends: 41 [2022-12-14 06:36:20,494 INFO L226 Difference]: Without dead ends: 41 [2022-12-14 06:36:20,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=242, Invalid=1398, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 06:36:20,495 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 96 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:20,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 22 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:36:20,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-12-14 06:36:20,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2022-12-14 06:36:20,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 32 states have internal predecessors, (38), 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) [2022-12-14 06:36:20,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-12-14 06:36:20,497 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 12 [2022-12-14 06:36:20,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:20,497 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-12-14 06:36:20,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:36:20,497 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-12-14 06:36:20,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 06:36:20,498 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:20,498 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:36:20,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 06:36:20,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:36:20,700 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 06:36:20,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:20,701 INFO L85 PathProgramCache]: Analyzing trace with hash 867410658, now seen corresponding path program 2 times [2022-12-14 06:36:20,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:20,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041879505] [2022-12-14 06:36:20,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:20,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:20,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:21,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:36:21,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:21,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041879505] [2022-12-14 06:36:21,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041879505] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:36:21,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380641410] [2022-12-14 06:36:21,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:36:21,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:36:21,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:36:21,147 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:36:21,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:36:21,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 06:36:21,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:36:21,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-14 06:36:21,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:36:21,220 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-14 06:36:21,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2022-12-14 06:36:21,255 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 18 treesize of output 14 [2022-12-14 06:36:21,530 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:36:21,531 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 24 treesize of output 21 [2022-12-14 06:36:21,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:36:21,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:36:22,093 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 [2022-12-14 06:36:22,097 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 [2022-12-14 06:36:22,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:36:22,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380641410] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:36:22,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [292015264] [2022-12-14 06:36:22,134 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 06:36:22,134 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:36:22,134 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:36:22,135 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:36:22,135 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:36:22,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:22,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 06:36:22,179 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 [2022-12-14 06:36:22,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:22,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 06:36:22,401 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:36:23,925 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '896#(and (<= 0 |ULTIMATE.start_cstrpbrk_~scanp~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrpbrk_~scanp~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 1) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrpbrk_#t~post4#1.base|) (+ |ULTIMATE.start_cstrpbrk_#t~post4#1.offset| 1)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post4#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 06:36:23,926 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:36:23,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:36:23,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2022-12-14 06:36:23,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675149565] [2022-12-14 06:36:23,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:36:23,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 06:36:23,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:23,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 06:36:23,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1325, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 06:36:23,927 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 29 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 28 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) [2022-12-14 06:36:25,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:25,598 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-12-14 06:36:25,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 06:36:25,598 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 28 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) Word has length 16 [2022-12-14 06:36:25,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:25,599 INFO L225 Difference]: With dead ends: 40 [2022-12-14 06:36:25,599 INFO L226 Difference]: Without dead ends: 40 [2022-12-14 06:36:25,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=395, Invalid=2257, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 06:36:25,600 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 135 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:25,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 52 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:36:25,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-14 06:36:25,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 20. [2022-12-14 06:36:25,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:36:25,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-12-14 06:36:25,602 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 16 [2022-12-14 06:36:25,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:25,602 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-12-14 06:36:25,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 28 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) [2022-12-14 06:36:25,602 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-12-14 06:36:25,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 06:36:25,602 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:25,602 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-12-14 06:36:25,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 06:36:25,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:36:25,804 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 06:36:25,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:25,805 INFO L85 PathProgramCache]: Analyzing trace with hash -413386830, now seen corresponding path program 2 times [2022-12-14 06:36:25,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:25,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753229048] [2022-12-14 06:36:25,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:25,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:26,343 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:36:26,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:26,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753229048] [2022-12-14 06:36:26,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753229048] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:36:26,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288899277] [2022-12-14 06:36:26,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:36:26,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:36:26,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:36:26,345 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:36:26,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 06:36:26,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 06:36:26,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:36:26,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-14 06:36:26,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:36:26,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 06:36:26,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 06:36:26,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 06:36:26,879 INFO L321 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2022-12-14 06:36:26,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2022-12-14 06:36:27,015 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:36:27,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:36:27,426 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:36:27,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 34 [2022-12-14 06:36:27,438 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:36:27,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 63 [2022-12-14 06:36:27,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-12-14 06:36:27,449 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 [2022-12-14 06:36:27,518 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:36:27,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288899277] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:36:27,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [593015623] [2022-12-14 06:36:27,520 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 06:36:27,521 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:36:27,521 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:36:27,521 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:36:27,521 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:36:27,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:27,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 06:36:27,567 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 [2022-12-14 06:36:27,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:27,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 06:36:27,803 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:36:29,134 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1123#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrpbrk_#t~post2#1.base|) (+ |ULTIMATE.start_cstrpbrk_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post2#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 06:36:29,134 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:36:29,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:36:29,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 33 [2022-12-14 06:36:29,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368479375] [2022-12-14 06:36:29,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:36:29,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 06:36:29,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:29,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 06:36:29,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1724, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 06:36:29,136 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 35 states, 34 states have (on average 1.5) internal successors, (51), 34 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) [2022-12-14 06:36:30,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:30,317 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-12-14 06:36:30,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 06:36:30,317 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.5) internal successors, (51), 34 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 06:36:30,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:30,318 INFO L225 Difference]: With dead ends: 40 [2022-12-14 06:36:30,318 INFO L226 Difference]: Without dead ends: 40 [2022-12-14 06:36:30,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=437, Invalid=3103, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 06:36:30,319 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 187 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:30,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 93 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:36:30,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-14 06:36:30,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2022-12-14 06:36:30,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 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) [2022-12-14 06:36:30,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-12-14 06:36:30,322 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 17 [2022-12-14 06:36:30,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:30,322 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-12-14 06:36:30,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.5) internal successors, (51), 34 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) [2022-12-14 06:36:30,323 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-12-14 06:36:30,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 06:36:30,323 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:30,323 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2022-12-14 06:36:30,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 06:36:30,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 06:36:30,525 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 06:36:30,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:30,526 INFO L85 PathProgramCache]: Analyzing trace with hash -653722786, now seen corresponding path program 3 times [2022-12-14 06:36:30,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:30,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180887774] [2022-12-14 06:36:30,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:30,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:30,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:31,202 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:36:31,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:31,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180887774] [2022-12-14 06:36:31,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180887774] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:36:31,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730088237] [2022-12-14 06:36:31,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:36:31,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:36:31,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:36:31,203 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:36:31,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 06:36:31,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:36:31,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:36:31,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 87 conjunts are in the unsatisfiable core [2022-12-14 06:36:31,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:36:31,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 06:36:31,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 06:36:31,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 06:36:32,087 INFO L321 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-12-14 06:36:32,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 39 [2022-12-14 06:36:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:36:32,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:36:33,034 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:36:33,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 58 [2022-12-14 06:36:33,054 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:36:33,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 108 treesize of output 111 [2022-12-14 06:36:33,062 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 [2022-12-14 06:36:33,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 29 [2022-12-14 06:36:33,157 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:36:33,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730088237] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:36:33,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1777735945] [2022-12-14 06:36:33,159 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 06:36:33,159 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:36:33,160 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:36:33,160 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:36:33,160 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:36:33,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:33,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 06:36:33,201 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 [2022-12-14 06:36:33,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:33,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 06:36:33,483 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:36:34,870 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1455#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrpbrk_#t~post2#1.base|) (+ |ULTIMATE.start_cstrpbrk_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post2#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 06:36:34,870 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:36:34,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:36:34,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 47 [2022-12-14 06:36:34,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977132154] [2022-12-14 06:36:34,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:36:34,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-14 06:36:34,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:34,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-14 06:36:34,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=3054, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 06:36:34,872 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 49 states, 48 states have (on average 1.8125) internal successors, (87), 48 states have internal predecessors, (87), 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) [2022-12-14 06:36:42,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:42,001 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2022-12-14 06:36:42,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-14 06:36:42,001 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.8125) internal successors, (87), 48 states have internal predecessors, (87), 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 [2022-12-14 06:36:42,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:42,001 INFO L225 Difference]: With dead ends: 97 [2022-12-14 06:36:42,001 INFO L226 Difference]: Without dead ends: 97 [2022-12-14 06:36:42,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1905 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=1287, Invalid=9219, Unknown=0, NotChecked=0, Total=10506 [2022-12-14 06:36:42,003 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 526 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:42,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 232 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 06:36:42,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-12-14 06:36:42,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 62. [2022-12-14 06:36:42,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 61 states have internal predecessors, (70), 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) [2022-12-14 06:36:42,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2022-12-14 06:36:42,006 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 29 [2022-12-14 06:36:42,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:42,006 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2022-12-14 06:36:42,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 1.8125) internal successors, (87), 48 states have internal predecessors, (87), 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) [2022-12-14 06:36:42,006 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2022-12-14 06:36:42,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 06:36:42,007 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:42,007 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1] [2022-12-14 06:36:42,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 06:36:42,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 06:36:42,208 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 06:36:42,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:42,209 INFO L85 PathProgramCache]: Analyzing trace with hash -8840010, now seen corresponding path program 4 times [2022-12-14 06:36:42,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:42,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801765219] [2022-12-14 06:36:42,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:42,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:42,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:43,157 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:36:43,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:43,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801765219] [2022-12-14 06:36:43,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801765219] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:36:43,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66607878] [2022-12-14 06:36:43,158 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:36:43,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:36:43,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:36:43,159 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:36:43,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 06:36:43,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:43,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 134 conjunts are in the unsatisfiable core [2022-12-14 06:36:43,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:36:43,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 06:36:43,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 06:36:43,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 06:36:46,412 INFO L321 Elim1Store]: treesize reduction 28, result has 68.2 percent of original size [2022-12-14 06:36:46,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 8 case distinctions, treesize of input 90 treesize of output 94 [2022-12-14 06:36:46,419 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-12-14 06:36:46,428 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-12-14 06:36:46,641 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:36:46,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:36:50,266 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:36:50,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 183 treesize of output 106 [2022-12-14 06:36:50,302 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:36:50,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 8 case distinctions, treesize of input 208 treesize of output 251 [2022-12-14 06:36:50,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 57 [2022-12-14 06:36:50,331 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 [2022-12-14 06:36:50,411 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-12-14 06:36:50,522 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:36:50,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66607878] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:36:50,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2136067642] [2022-12-14 06:36:50,524 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 06:36:50,524 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:36:50,525 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:36:50,525 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:36:50,525 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:36:50,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:50,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 06:36:50,568 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 [2022-12-14 06:36:50,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:50,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 06:36:50,857 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:36:53,107 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2102#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrpbrk_#t~post2#1.base|) (+ |ULTIMATE.start_cstrpbrk_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post2#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 06:36:53,107 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:36:53,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:36:53,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 28, 28] total 75 [2022-12-14 06:36:53,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476184251] [2022-12-14 06:36:53,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:36:53,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-12-14 06:36:53,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:53,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-12-14 06:36:53,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=6781, Unknown=1, NotChecked=0, Total=7310 [2022-12-14 06:36:53,110 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 77 states, 76 states have (on average 2.0921052631578947) internal successors, (159), 76 states have internal predecessors, (159), 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) [2022-12-14 06:37:18,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:37:18,735 INFO L93 Difference]: Finished difference Result 205 states and 228 transitions. [2022-12-14 06:37:18,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-12-14 06:37:18,735 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 2.0921052631578947) internal successors, (159), 76 states have internal predecessors, (159), 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 53 [2022-12-14 06:37:18,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:37:18,736 INFO L225 Difference]: With dead ends: 205 [2022-12-14 06:37:18,736 INFO L226 Difference]: Without dead ends: 205 [2022-12-14 06:37:18,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6089 ImplicationChecksByTransitivity, 31.2s TimeCoverageRelationStatistics Valid=3461, Invalid=28400, Unknown=1, NotChecked=0, Total=31862 [2022-12-14 06:37:18,741 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1597 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 2149 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1597 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 2194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:37:18,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1597 Valid, 974 Invalid, 2194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2149 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 06:37:18,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-12-14 06:37:18,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 118. [2022-12-14 06:37:18,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.1452991452991452) internal successors, (134), 117 states have internal predecessors, (134), 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) [2022-12-14 06:37:18,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 134 transitions. [2022-12-14 06:37:18,748 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 134 transitions. Word has length 53 [2022-12-14 06:37:18,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:37:18,748 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 134 transitions. [2022-12-14 06:37:18,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 2.0921052631578947) internal successors, (159), 76 states have internal predecessors, (159), 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) [2022-12-14 06:37:18,749 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 134 transitions. [2022-12-14 06:37:18,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 06:37:18,751 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:37:18,751 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 1, 1, 1, 1] [2022-12-14 06:37:18,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 06:37:18,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 06:37:18,952 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 06:37:18,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:37:18,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1693989018, now seen corresponding path program 5 times [2022-12-14 06:37:18,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:37:18,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898173478] [2022-12-14 06:37:18,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:37:18,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:37:19,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:37:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 752 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:37:20,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:37:20,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898173478] [2022-12-14 06:37:20,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898173478] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:37:20,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057816969] [2022-12-14 06:37:20,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:37:20,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:37:20,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:37:20,939 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:37:20,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 06:37:21,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-12-14 06:37:21,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:37:21,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 124 conjunts are in the unsatisfiable core [2022-12-14 06:37:21,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:37:21,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 06:37:21,229 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 11 treesize of output 13 [2022-12-14 06:37:21,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 06:37:21,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-12-14 06:37:23,957 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:37:23,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2022-12-14 06:37:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 15 proven. 92 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2022-12-14 06:37:24,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:37:25,320 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 44 treesize of output 38 [2022-12-14 06:37:25,425 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2022-12-14 06:37:25,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057816969] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:37:25,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [718748403] [2022-12-14 06:37:25,426 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 06:37:25,426 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:37:25,426 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:37:25,427 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:37:25,427 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:37:25,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:25,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 06:37:25,461 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 [2022-12-14 06:37:25,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:25,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 06:37:25,733 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:37:27,611 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3264#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrpbrk_#t~post2#1.base|) (+ |ULTIMATE.start_cstrpbrk_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post2#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 06:37:27,611 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:37:27,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:37:27,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 8, 7] total 42 [2022-12-14 06:37:27,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125691910] [2022-12-14 06:37:27,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:37:27,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 06:37:27,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:37:27,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 06:37:27,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 06:37:27,613 INFO L87 Difference]: Start difference. First operand 118 states and 134 transitions. Second operand has 44 states, 43 states have (on average 3.13953488372093) internal successors, (135), 43 states have internal predecessors, (135), 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) [2022-12-14 06:37:46,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:37:46,758 INFO L93 Difference]: Finished difference Result 134 states and 150 transitions. [2022-12-14 06:37:46,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-12-14 06:37:46,759 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 3.13953488372093) internal successors, (135), 43 states have internal predecessors, (135), 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 101 [2022-12-14 06:37:46,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:37:46,759 INFO L225 Difference]: With dead ends: 134 [2022-12-14 06:37:46,759 INFO L226 Difference]: Without dead ends: 0 [2022-12-14 06:37:46,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2301 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=2925, Invalid=11837, Unknown=0, NotChecked=0, Total=14762 [2022-12-14 06:37:46,761 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 144 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 1393 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 1402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:37:46,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 771 Invalid, 1402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1393 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 06:37:46,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-14 06:37:46,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-14 06:37:46,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:37:46,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-14 06:37:46,762 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 101 [2022-12-14 06:37:46,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:37:46,762 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-14 06:37:46,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 3.13953488372093) internal successors, (135), 43 states have internal predecessors, (135), 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) [2022-12-14 06:37:46,762 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-14 06:37:46,762 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-14 06:37:46,764 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 9 remaining) [2022-12-14 06:37:46,765 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2022-12-14 06:37:46,765 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2022-12-14 06:37:46,765 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2022-12-14 06:37:46,765 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2022-12-14 06:37:46,765 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 9 remaining) [2022-12-14 06:37:46,765 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 9 remaining) [2022-12-14 06:37:46,765 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 9 remaining) [2022-12-14 06:37:46,765 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2022-12-14 06:37:46,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 06:37:46,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 06:37:46,975 INFO L445 BasicCegarLoop]: Path program histogram: [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:37:46,980 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 06:37:46,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 06:37:46 BoogieIcfgContainer [2022-12-14 06:37:46,983 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 06:37:46,983 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 06:37:46,983 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 06:37:46,983 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 06:37:46,984 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:36:12" (3/4) ... [2022-12-14 06:37:46,986 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-14 06:37:46,993 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2022-12-14 06:37:46,993 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2022-12-14 06:37:46,993 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-12-14 06:37:46,993 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-12-14 06:37:47,015 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 06:37:47,015 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 06:37:47,016 INFO L158 Benchmark]: Toolchain (without parser) took 94980.83ms. Allocated memory was 125.8MB in the beginning and 264.2MB in the end (delta: 138.4MB). Free memory was 89.3MB in the beginning and 112.4MB in the end (delta: -23.1MB). Peak memory consumption was 120.6MB. Max. memory is 16.1GB. [2022-12-14 06:37:47,016 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 125.8MB. Free memory is still 68.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 06:37:47,016 INFO L158 Benchmark]: CACSL2BoogieTranslator took 238.46ms. Allocated memory is still 125.8MB. Free memory was 88.8MB in the beginning and 73.2MB in the end (delta: 15.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-14 06:37:47,017 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.77ms. Allocated memory is still 125.8MB. Free memory was 73.2MB in the beginning and 71.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 06:37:47,017 INFO L158 Benchmark]: Boogie Preprocessor took 17.87ms. Allocated memory is still 125.8MB. Free memory was 71.6MB in the beginning and 70.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 06:37:47,017 INFO L158 Benchmark]: RCFGBuilder took 306.74ms. Allocated memory is still 125.8MB. Free memory was 70.0MB in the beginning and 54.8MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-14 06:37:47,017 INFO L158 Benchmark]: TraceAbstraction took 94353.30ms. Allocated memory was 125.8MB in the beginning and 264.2MB in the end (delta: 138.4MB). Free memory was 53.9MB in the beginning and 115.5MB in the end (delta: -61.7MB). Peak memory consumption was 80.7MB. Max. memory is 16.1GB. [2022-12-14 06:37:47,018 INFO L158 Benchmark]: Witness Printer took 32.49ms. Allocated memory is still 264.2MB. Free memory was 115.5MB in the beginning and 112.4MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-12-14 06:37:47,019 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 125.8MB. Free memory is still 68.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 238.46ms. Allocated memory is still 125.8MB. Free memory was 88.8MB in the beginning and 73.2MB in the end (delta: 15.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.77ms. Allocated memory is still 125.8MB. Free memory was 73.2MB in the beginning and 71.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.87ms. Allocated memory is still 125.8MB. Free memory was 71.6MB in the beginning and 70.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 306.74ms. Allocated memory is still 125.8MB. Free memory was 70.0MB in the beginning and 54.8MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 94353.30ms. Allocated memory was 125.8MB in the beginning and 264.2MB in the end (delta: 138.4MB). Free memory was 53.9MB in the beginning and 115.5MB in the end (delta: -61.7MB). Peak memory consumption was 80.7MB. Max. memory is 16.1GB. * Witness Printer took 32.49ms. Allocated memory is still 264.2MB. Free memory was 115.5MB in the beginning and 112.4MB in the end (delta: 3.1MB). 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 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 559]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 23 locations, 9 error locations. Started 1 CEGAR loops. OverallTime: 94.3s, OverallIterations: 16, TraceHistogramMax: 17, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 55.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3002 SdHoareTripleChecker+Valid, 4.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3002 mSDsluCounter, 2350 SdHoareTripleChecker+Invalid, 4.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2130 mSDsCounter, 102 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5122 IncrementalHoareTripleChecker+Invalid, 5224 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 102 mSolverCounterUnsat, 220 mSDtfsCounter, 5122 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1086 GetRequests, 472 SyntacticMatches, 1 SemanticMatches, 613 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12250 ImplicationChecksByTransitivity, 73.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=118occurred in iteration=15, InterpolantAutomatonStates: 305, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 16 MinimizatonAttempts, 162 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 22.2s InterpolantComputationTime, 523 NumberOfCodeBlocks, 523 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 732 ConstructedInterpolants, 297 QuantifiedInterpolants, 26147 SizeOfPredicates, 180 NumberOfNonLiveVariables, 1928 ConjunctsInSsa, 529 ConjunctsInUnsatCore, 30 InterpolantComputations, 9 PerfectInterpolantSequences, 1307/3006 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-12-14 06:37:47,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b547ac15-f261-4b36-9460-34a6724643fa/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE