./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-memory-alloca/cstrchr-alloca-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-memory-alloca/cstrchr-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0 --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 312f51ef4503f0fc4b94d177cfa21e5892ce6df837fb8c86c4b09d81ecb9ffbb --- 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-e04fb08 [2022-11-16 15:52:47,079 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 15:52:47,081 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 15:52:47,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 15:52:47,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 15:52:47,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 15:52:47,111 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 15:52:47,113 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 15:52:47,115 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 15:52:47,116 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 15:52:47,118 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 15:52:47,119 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 15:52:47,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 15:52:47,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 15:52:47,122 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 15:52:47,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 15:52:47,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 15:52:47,126 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 15:52:47,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 15:52:47,130 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 15:52:47,132 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 15:52:47,134 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 15:52:47,135 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 15:52:47,137 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 15:52:47,141 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 15:52:47,142 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 15:52:47,142 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 15:52:47,143 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 15:52:47,144 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 15:52:47,145 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 15:52:47,145 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 15:52:47,147 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 15:52:47,148 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 15:52:47,149 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 15:52:47,150 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 15:52:47,151 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 15:52:47,152 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 15:52:47,152 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 15:52:47,153 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 15:52:47,154 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 15:52:47,155 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 15:52:47,156 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2022-11-16 15:52:47,185 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 15:52:47,187 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 15:52:47,192 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 15:52:47,192 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 15:52:47,193 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 15:52:47,194 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 15:52:47,194 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 15:52:47,194 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 15:52:47,194 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 15:52:47,195 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 15:52:47,196 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 15:52:47,196 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 15:52:47,196 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 15:52:47,196 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 15:52:47,197 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 15:52:47,197 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 15:52:47,197 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 15:52:47,197 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 15:52:47,198 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 15:52:47,198 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 15:52:47,199 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 15:52:47,199 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 15:52:47,199 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 15:52:47,199 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 15:52:47,200 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 15:52:47,200 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 15:52:47,200 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 15:52:47,200 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 15:52:47,201 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 15:52:47,201 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 15:52:47,201 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 15:52:47,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 15:52:47,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 15:52:47,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 15:52:47,202 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 15:52:47,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 15:52:47,203 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 15:52:47,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 15:52:47,203 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 15:52:47,204 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_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 312f51ef4503f0fc4b94d177cfa21e5892ce6df837fb8c86c4b09d81ecb9ffbb [2022-11-16 15:52:47,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 15:52:47,494 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 15:52:47,497 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 15:52:47,498 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 15:52:47,499 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 15:52:47,501 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/termination-memory-alloca/cstrchr-alloca-1.i [2022-11-16 15:52:47,576 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/data/ff7754923/2ee5b22bc55e4dc3988d0bdba0e609b9/FLAG6f29ade98 [2022-11-16 15:52:48,196 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 15:52:48,197 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/sv-benchmarks/c/termination-memory-alloca/cstrchr-alloca-1.i [2022-11-16 15:52:48,207 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/data/ff7754923/2ee5b22bc55e4dc3988d0bdba0e609b9/FLAG6f29ade98 [2022-11-16 15:52:48,494 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/data/ff7754923/2ee5b22bc55e4dc3988d0bdba0e609b9 [2022-11-16 15:52:48,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 15:52:48,499 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 15:52:48,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 15:52:48,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 15:52:48,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 15:52:48,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 03:52:48" (1/1) ... [2022-11-16 15:52:48,508 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f254022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:48, skipping insertion in model container [2022-11-16 15:52:48,508 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 03:52:48" (1/1) ... [2022-11-16 15:52:48,516 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 15:52:48,548 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 15:52:48,888 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 15:52:48,900 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 15:52:48,963 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 15:52:49,020 INFO L208 MainTranslator]: Completed translation [2022-11-16 15:52:49,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:49 WrapperNode [2022-11-16 15:52:49,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 15:52:49,022 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 15:52:49,023 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 15:52:49,023 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 15:52:49,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:49" (1/1) ... [2022-11-16 15:52:49,054 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:49" (1/1) ... [2022-11-16 15:52:49,080 INFO L138 Inliner]: procedures = 111, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2022-11-16 15:52:49,080 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 15:52:49,081 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 15:52:49,082 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 15:52:49,082 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 15:52:49,091 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:49" (1/1) ... [2022-11-16 15:52:49,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:49" (1/1) ... [2022-11-16 15:52:49,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:49" (1/1) ... [2022-11-16 15:52:49,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:49" (1/1) ... [2022-11-16 15:52:49,115 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:49" (1/1) ... [2022-11-16 15:52:49,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:49" (1/1) ... [2022-11-16 15:52:49,129 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:49" (1/1) ... [2022-11-16 15:52:49,132 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:49" (1/1) ... [2022-11-16 15:52:49,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 15:52:49,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 15:52:49,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 15:52:49,135 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 15:52:49,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:49" (1/1) ... [2022-11-16 15:52:49,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 15:52:49,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:52:49,176 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 15:52:49,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 15:52:49,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 15:52:49,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 15:52:49,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 15:52:49,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 15:52:49,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 15:52:49,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 15:52:49,411 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 15:52:49,421 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 15:52:49,662 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 15:52:49,742 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 15:52:49,742 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 15:52:49,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 03:52:49 BoogieIcfgContainer [2022-11-16 15:52:49,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 15:52:49,750 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 15:52:49,751 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 15:52:49,755 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 15:52:49,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 03:52:48" (1/3) ... [2022-11-16 15:52:49,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d59b1d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 03:52:49, skipping insertion in model container [2022-11-16 15:52:49,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:49" (2/3) ... [2022-11-16 15:52:49,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d59b1d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 03:52:49, skipping insertion in model container [2022-11-16 15:52:49,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 03:52:49" (3/3) ... [2022-11-16 15:52:49,759 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrchr-alloca-1.i [2022-11-16 15:52:49,783 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 15:52:49,784 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2022-11-16 15:52:49,852 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 15:52:49,862 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;@21ff30e1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 15:52:49,862 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-11-16 15:52:49,875 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 8 states have (on average 2.5) 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) [2022-11-16 15:52:49,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 15:52:49,887 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:52:49,888 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 15:52:49,889 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)] === [2022-11-16 15:52:49,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:52:49,897 INFO L85 PathProgramCache]: Analyzing trace with hash 2801, now seen corresponding path program 1 times [2022-11-16 15:52:49,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:52:49,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119622672] [2022-11-16 15:52:49,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:52:49,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:52:50,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:52:50,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:52:50,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:52:50,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119622672] [2022-11-16 15:52:50,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119622672] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:52:50,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:52:50,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 15:52:50,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674589873] [2022-11-16 15:52:50,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:52:50,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 15:52:50,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:52:50,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 15:52:50,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 15:52:50,209 INFO L87 Difference]: Start difference. First operand has 18 states, 8 states have (on average 2.5) 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) 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) [2022-11-16 15:52:50,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:52:50,245 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2022-11-16 15:52:50,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 15:52:50,248 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 [2022-11-16 15:52:50,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:52:50,255 INFO L225 Difference]: With dead ends: 17 [2022-11-16 15:52:50,255 INFO L226 Difference]: Without dead ends: 16 [2022-11-16 15:52:50,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 15:52:50,261 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 14 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 15:52:50,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 8 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 15:52:50,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-16 15:52:50,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-16 15:52:50,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 8 states have (on average 2.125) 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) [2022-11-16 15:52:50,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-11-16 15:52:50,293 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 2 [2022-11-16 15:52:50,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:52:50,293 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-11-16 15:52:50,294 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) [2022-11-16 15:52:50,294 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-11-16 15:52:50,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 15:52:50,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:52:50,295 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 15:52:50,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 15:52:50,295 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)] === [2022-11-16 15:52:50,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:52:50,296 INFO L85 PathProgramCache]: Analyzing trace with hash 2802, now seen corresponding path program 1 times [2022-11-16 15:52:50,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:52:50,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999738507] [2022-11-16 15:52:50,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:52:50,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:52:50,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:52:50,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:52:50,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:52:50,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999738507] [2022-11-16 15:52:50,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999738507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:52:50,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:52:50,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 15:52:50,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512082266] [2022-11-16 15:52:50,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:52:50,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 15:52:50,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:52:50,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 15:52:50,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 15:52:50,637 INFO L87 Difference]: Start difference. First operand 16 states and 17 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) [2022-11-16 15:52:50,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:52:50,661 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2022-11-16 15:52:50,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 15:52:50,662 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 [2022-11-16 15:52:50,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:52:50,662 INFO L225 Difference]: With dead ends: 15 [2022-11-16 15:52:50,662 INFO L226 Difference]: Without dead ends: 15 [2022-11-16 15:52:50,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 15:52:50,664 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 15 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 8 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 [2022-11-16 15:52:50,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 8 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 15:52:50,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-16 15:52:50,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-16 15:52:50,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 8 states have (on average 2.0) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:52:50,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-11-16 15:52:50,669 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 2 [2022-11-16 15:52:50,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:52:50,669 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-11-16 15:52:50,670 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) [2022-11-16 15:52:50,670 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-11-16 15:52:50,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 15:52:50,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:52:50,671 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 15:52:50,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 15:52:50,671 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)] === [2022-11-16 15:52:50,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:52:50,672 INFO L85 PathProgramCache]: Analyzing trace with hash 88152, now seen corresponding path program 1 times [2022-11-16 15:52:50,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:52:50,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819113022] [2022-11-16 15:52:50,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:52:50,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:52:50,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:52:50,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:52:50,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:52:50,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819113022] [2022-11-16 15:52:50,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819113022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:52:50,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:52:50,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 15:52:50,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967881657] [2022-11-16 15:52:50,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:52:50,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 15:52:50,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:52:50,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 15:52:50,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 15:52:50,727 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:52:50,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:52:50,752 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2022-11-16 15:52:50,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 15:52:50,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 15:52:50,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:52:50,754 INFO L225 Difference]: With dead ends: 12 [2022-11-16 15:52:50,754 INFO L226 Difference]: Without dead ends: 12 [2022-11-16 15:52:50,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 15:52:50,756 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 15:52:50,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 4 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 15:52:50,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-16 15:52:50,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-16 15:52:50,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 8 states have (on average 1.625) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:52:50,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2022-11-16 15:52:50,760 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 3 [2022-11-16 15:52:50,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:52:50,761 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2022-11-16 15:52:50,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:52:50,761 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2022-11-16 15:52:50,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 15:52:50,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:52:50,762 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 15:52:50,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 15:52:50,762 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)] === [2022-11-16 15:52:50,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:52:50,763 INFO L85 PathProgramCache]: Analyzing trace with hash 88153, now seen corresponding path program 1 times [2022-11-16 15:52:50,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:52:50,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858370435] [2022-11-16 15:52:50,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:52:50,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:52:50,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:52:50,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:52:50,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:52:50,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858370435] [2022-11-16 15:52:50,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858370435] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:52:50,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:52:50,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 15:52:50,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424805716] [2022-11-16 15:52:50,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:52:50,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 15:52:50,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:52:50,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 15:52:50,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 15:52:50,858 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:52:50,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:52:50,903 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-11-16 15:52:50,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 15:52:50,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 15:52:50,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:52:50,904 INFO L225 Difference]: With dead ends: 19 [2022-11-16 15:52:50,905 INFO L226 Difference]: Without dead ends: 19 [2022-11-16 15:52:50,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 15:52:50,906 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 27 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 15:52:50,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 11 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 15:52:50,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-16 15:52:50,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-11-16 15:52:50,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:52:50,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-16 15:52:50,911 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 3 [2022-11-16 15:52:50,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:52:50,911 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-16 15:52:50,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:52:50,912 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-16 15:52:50,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 15:52:50,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:52:50,913 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 15:52:50,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 15:52:50,913 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-16 15:52:50,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:52:50,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1667877577, now seen corresponding path program 1 times [2022-11-16 15:52:50,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:52:50,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483312152] [2022-11-16 15:52:50,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:52:50,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:52:50,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:52:50,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:52:50,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:52:50,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483312152] [2022-11-16 15:52:50,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483312152] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:52:50,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:52:50,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 15:52:50,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204781698] [2022-11-16 15:52:50,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:52:50,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 15:52:50,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:52:50,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 15:52:50,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 15:52:50,947 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:52:50,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:52:50,966 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2022-11-16 15:52:50,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 15:52:50,967 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 15:52:50,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:52:50,968 INFO L225 Difference]: With dead ends: 19 [2022-11-16 15:52:50,968 INFO L226 Difference]: Without dead ends: 19 [2022-11-16 15:52:50,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 15:52:50,970 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 15:52:50,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 15:52:50,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-16 15:52:50,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-16 15:52:50,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:52:50,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-11-16 15:52:50,979 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 6 [2022-11-16 15:52:50,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:52:50,980 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-11-16 15:52:50,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:52:50,982 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-11-16 15:52:50,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 15:52:50,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:52:50,987 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:52:50,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 15:52:50,988 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-16 15:52:50,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:52:50,989 INFO L85 PathProgramCache]: Analyzing trace with hash -164760189, now seen corresponding path program 1 times [2022-11-16 15:52:50,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:52:50,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105073017] [2022-11-16 15:52:50,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:52:50,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:52:51,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:52:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:52:51,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:52:51,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105073017] [2022-11-16 15:52:51,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105073017] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:52:51,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74278798] [2022-11-16 15:52:51,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:52:51,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:52:51,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:52:51,537 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:52:51,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 15:52:51,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:52:51,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 15:52:51,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:52:51,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 15:52:51,901 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 15:52:51,901 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 32 treesize of output 29 [2022-11-16 15:52:52,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:52:52,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:52:52,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-11-16 15:52:52,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 15:52:52,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-16 15:52:52,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:52:52,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74278798] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 15:52:52,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [64154402] [2022-11-16 15:52:52,342 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 15:52:52,342 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:52:52,347 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:52:52,353 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:52:52,354 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:52:52,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 15:52:52,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 15:52:52,655 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:52:53,371 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '251#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrchr_#in~s#1.offset|) (< (select |#length| |ULTIMATE.start_cstrchr_~s#1.base|) (+ |ULTIMATE.start_cstrchr_~s#1.offset| 1)) (<= |ULTIMATE.start_cstrchr_~c#1| 2147483647) (<= 0 |ULTIMATE.start_cstrchr_#in~s#1.base|) (<= |ULTIMATE.start_cstrchr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrchr_~s#1.base|) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet9#1|)) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_cstrchr_#in~c#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_#t~nondet9#1| 2147483647) (<= 1 |ULTIMATE.start_main_~length~0#1|) (= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_cstrchr_~c#1| 2147483648)) (<= 0 |ULTIMATE.start_cstrchr_~s#1.offset|) (<= |ULTIMATE.start_cstrchr_#in~c#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 15:52:53,372 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:52:53,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 15:52:53,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2022-11-16 15:52:53,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867532866] [2022-11-16 15:52:53,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 15:52:53,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 15:52:53,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:52:53,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 15:52:53,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-11-16 15:52:53,375 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:52:53,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:52:53,586 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-11-16 15:52:53,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 15:52:53,587 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 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) Word has length 7 [2022-11-16 15:52:53,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:52:53,588 INFO L225 Difference]: With dead ends: 28 [2022-11-16 15:52:53,588 INFO L226 Difference]: Without dead ends: 28 [2022-11-16 15:52:53,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-11-16 15:52:53,589 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 37 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 15:52:53,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 29 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 77 Invalid, 0 Unknown, 4 Unchecked, 0.1s Time] [2022-11-16 15:52:53,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-16 15:52:53,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 16. [2022-11-16 15:52:53,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:52:53,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-11-16 15:52:53,592 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 7 [2022-11-16 15:52:53,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:52:53,593 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-11-16 15:52:53,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:52:53,593 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-11-16 15:52:53,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 15:52:53,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:52:53,594 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:52:53,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 15:52:53,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 15:52:53,795 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-16 15:52:53,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:52:53,795 INFO L85 PathProgramCache]: Analyzing trace with hash -164598156, now seen corresponding path program 1 times [2022-11-16 15:52:53,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:52:53,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052767810] [2022-11-16 15:52:53,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:52:53,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:52:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:52:53,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:52:53,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:52:53,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052767810] [2022-11-16 15:52:53,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052767810] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:52:53,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:52:53,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 15:52:53,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734346292] [2022-11-16 15:52:53,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:52:53,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 15:52:53,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:52:53,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 15:52:53,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 15:52:53,892 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:52:53,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:52:53,909 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2022-11-16 15:52:53,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 15:52:53,910 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 15:52:53,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:52:53,911 INFO L225 Difference]: With dead ends: 15 [2022-11-16 15:52:53,911 INFO L226 Difference]: Without dead ends: 12 [2022-11-16 15:52:53,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 15:52:53,912 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 15:52:53,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 10 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 15:52:53,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-16 15:52:53,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-16 15:52:53,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:52:53,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2022-11-16 15:52:53,914 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 7 [2022-11-16 15:52:53,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:52:53,915 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2022-11-16 15:52:53,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:52:53,915 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2022-11-16 15:52:53,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 15:52:53,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:52:53,916 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1] [2022-11-16 15:52:53,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 15:52:53,916 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-16 15:52:53,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:52:53,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1659638355, now seen corresponding path program 2 times [2022-11-16 15:52:53,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:52:53,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568553681] [2022-11-16 15:52:53,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:52:53,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:52:53,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:52:54,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:52:54,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:52:54,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568553681] [2022-11-16 15:52:54,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568553681] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:52:54,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734212150] [2022-11-16 15:52:54,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 15:52:54,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:52:54,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:52:54,469 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:52:54,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 15:52:54,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 15:52:54,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 15:52:54,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-16 15:52:54,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:52:54,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 15:52:54,873 INFO L321 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2022-11-16 15:52:54,873 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 39 treesize of output 35 [2022-11-16 15:52:55,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:52:55,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:52:55,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 15:52:55,325 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 29 treesize of output 25 [2022-11-16 15:52:55,332 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 29 treesize of output 23 [2022-11-16 15:52:55,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:52:55,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734212150] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 15:52:55,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1680997184] [2022-11-16 15:52:55,377 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 15:52:55,377 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:52:55,377 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:52:55,378 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:52:55,378 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:52:55,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 15:52:55,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 15:52:55,630 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:52:56,443 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '424#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrchr_#in~s#1.offset|) (< (select |#length| |ULTIMATE.start_cstrchr_~s#1.base|) (+ |ULTIMATE.start_cstrchr_~s#1.offset| 1)) (<= |ULTIMATE.start_cstrchr_~c#1| 2147483647) (<= 0 |ULTIMATE.start_cstrchr_#in~s#1.base|) (<= |ULTIMATE.start_cstrchr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrchr_~s#1.base|) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet9#1|)) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_cstrchr_#in~c#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_#t~nondet9#1| 2147483647) (<= 1 |ULTIMATE.start_main_~length~0#1|) (= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_cstrchr_~c#1| 2147483648)) (<= 0 |ULTIMATE.start_cstrchr_~s#1.offset|) (<= |ULTIMATE.start_cstrchr_#in~c#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 15:52:56,444 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:52:56,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 15:52:56,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2022-11-16 15:52:56,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807127074] [2022-11-16 15:52:56,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 15:52:56,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 15:52:56,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:52:56,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 15:52:56,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2022-11-16 15:52:56,446 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:52:56,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:52:56,773 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2022-11-16 15:52:56,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 15:52:56,774 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.32) internal successors, (33), 25 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 [2022-11-16 15:52:56,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:52:56,775 INFO L225 Difference]: With dead ends: 23 [2022-11-16 15:52:56,775 INFO L226 Difference]: Without dead ends: 23 [2022-11-16 15:52:56,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 15:52:56,777 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 24 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 15:52:56,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 7 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 115 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2022-11-16 15:52:56,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-16 15:52:56,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2022-11-16 15:52:56,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:52:56,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2022-11-16 15:52:56,780 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 11 [2022-11-16 15:52:56,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:52:56,781 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2022-11-16 15:52:56,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:52:56,781 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2022-11-16 15:52:56,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 15:52:56,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:52:56,782 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1] [2022-11-16 15:52:56,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 15:52:56,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 15:52:56,988 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-16 15:52:56,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:52:56,989 INFO L85 PathProgramCache]: Analyzing trace with hash -2093617407, now seen corresponding path program 3 times [2022-11-16 15:52:56,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:52:56,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257408527] [2022-11-16 15:52:56,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:52:56,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:52:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:52:57,767 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:52:57,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:52:57,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257408527] [2022-11-16 15:52:57,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257408527] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:52:57,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349094430] [2022-11-16 15:52:57,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 15:52:57,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:52:57,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:52:57,771 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:52:57,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 15:52:57,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 15:52:57,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 15:52:57,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-16 15:52:57,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:52:57,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 15:52:58,740 INFO L321 Elim1Store]: treesize reduction 12, result has 65.7 percent of original size [2022-11-16 15:52:58,740 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 55 treesize of output 51 [2022-11-16 15:52:58,885 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:52:58,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:52:59,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 15:52:59,902 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 59 treesize of output 51 [2022-11-16 15:52:59,915 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 59 treesize of output 45 [2022-11-16 15:52:59,972 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:52:59,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349094430] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 15:52:59,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [840944985] [2022-11-16 15:52:59,975 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 15:52:59,975 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:52:59,975 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:52:59,976 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:52:59,976 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:52:59,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 15:53:00,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 15:53:00,139 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:53:01,104 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '631#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrchr_#in~s#1.offset|) (< (select |#length| |ULTIMATE.start_cstrchr_~s#1.base|) (+ |ULTIMATE.start_cstrchr_~s#1.offset| 1)) (<= |ULTIMATE.start_cstrchr_~c#1| 2147483647) (<= 0 |ULTIMATE.start_cstrchr_#in~s#1.base|) (<= |ULTIMATE.start_cstrchr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrchr_~s#1.base|) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet9#1|)) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_cstrchr_#in~c#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_#t~nondet9#1| 2147483647) (<= 1 |ULTIMATE.start_main_~length~0#1|) (= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_cstrchr_~c#1| 2147483648)) (<= 0 |ULTIMATE.start_cstrchr_~s#1.offset|) (<= |ULTIMATE.start_cstrchr_#in~c#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 15:53:01,105 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:53:01,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 15:53:01,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 14] total 36 [2022-11-16 15:53:01,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885366765] [2022-11-16 15:53:01,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 15:53:01,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-16 15:53:01,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:53:01,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-16 15:53:01,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1661, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 15:53:01,110 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 38 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:53:03,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:53:03,304 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2022-11-16 15:53:03,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 15:53:03,306 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 15:53:03,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:53:03,306 INFO L225 Difference]: With dead ends: 39 [2022-11-16 15:53:03,307 INFO L226 Difference]: Without dead ends: 39 [2022-11-16 15:53:03,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=505, Invalid=3527, Unknown=0, NotChecked=0, Total=4032 [2022-11-16 15:53:03,309 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 59 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 15:53:03,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 7 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 144 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-16 15:53:03,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-16 15:53:03,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2022-11-16 15:53:03,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:53:03,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2022-11-16 15:53:03,313 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 19 [2022-11-16 15:53:03,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:53:03,313 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2022-11-16 15:53:03,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:53:03,313 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2022-11-16 15:53:03,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-16 15:53:03,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:53:03,314 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1] [2022-11-16 15:53:03,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 15:53:03,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:53:03,520 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-16 15:53:03,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:53:03,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1778895447, now seen corresponding path program 4 times [2022-11-16 15:53:03,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:53:03,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427661038] [2022-11-16 15:53:03,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:53:03,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:53:03,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:53:04,865 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:53:04,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:53:04,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427661038] [2022-11-16 15:53:04,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427661038] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:53:04,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129431776] [2022-11-16 15:53:04,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 15:53:04,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:53:04,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:53:04,871 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:53:04,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 15:53:04,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:53:04,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-16 15:53:05,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:53:05,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 15:54:28,487 INFO L321 Elim1Store]: treesize reduction 28, result has 56.9 percent of original size [2022-11-16 15:54:28,488 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 102 treesize of output 81 [2022-11-16 15:54:28,515 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-16 15:54:28,530 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-11-16 15:54:28,638 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 9 proven. 29 refuted. 82 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:54:28,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:54:31,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 15:54:31,738 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 119 treesize of output 103 [2022-11-16 15:54:31,755 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 119 treesize of output 89 [2022-11-16 15:54:31,803 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:54:31,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129431776] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 15:54:31,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2034093310] [2022-11-16 15:54:31,807 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 15:54:31,807 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:54:31,808 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:54:31,808 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:54:31,808 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:54:31,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 15:54:31,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 15:54:31,940 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:54:33,235 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1020#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrchr_#in~s#1.offset|) (< (select |#length| |ULTIMATE.start_cstrchr_~s#1.base|) (+ |ULTIMATE.start_cstrchr_~s#1.offset| 1)) (<= |ULTIMATE.start_cstrchr_~c#1| 2147483647) (<= 0 |ULTIMATE.start_cstrchr_#in~s#1.base|) (<= |ULTIMATE.start_cstrchr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrchr_~s#1.base|) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet9#1|)) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_cstrchr_#in~c#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_#t~nondet9#1| 2147483647) (<= 1 |ULTIMATE.start_main_~length~0#1|) (= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_cstrchr_~c#1| 2147483648)) (<= 0 |ULTIMATE.start_cstrchr_~s#1.offset|) (<= |ULTIMATE.start_cstrchr_#in~c#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 15:54:33,235 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:54:33,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 15:54:33,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 26, 26] total 61 [2022-11-16 15:54:33,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082643746] [2022-11-16 15:54:33,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 15:54:33,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-16 15:54:33,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:54:33,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-16 15:54:33,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=4022, Unknown=101, NotChecked=0, Total=4692 [2022-11-16 15:54:33,240 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 63 states, 62 states have (on average 1.6290322580645162) internal successors, (101), 62 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:55:16,376 WARN L233 SmtUtils]: Spent 5.37s on a formula simplification. DAG size of input: 67 DAG size of output: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 15:55:37,423 WARN L233 SmtUtils]: Spent 5.12s on a formula simplification. DAG size of input: 81 DAG size of output: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 15:55:47,622 WARN L233 SmtUtils]: Spent 6.07s on a formula simplification. DAG size of input: 80 DAG size of output: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 15:56:09,189 WARN L233 SmtUtils]: Spent 11.68s on a formula simplification. DAG size of input: 95 DAG size of output: 91 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 15:56:18,882 WARN L233 SmtUtils]: Spent 5.92s on a formula simplification. DAG size of input: 94 DAG size of output: 83 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 15:56:30,034 WARN L233 SmtUtils]: Spent 9.15s on a formula simplification. DAG size of input: 98 DAG size of output: 94 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 15:56:51,061 WARN L233 SmtUtils]: Spent 16.74s on a formula simplification. DAG size of input: 102 DAG size of output: 81 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 15:56:59,259 WARN L233 SmtUtils]: Spent 5.94s on a formula simplification. DAG size of input: 96 DAG size of output: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 15:57:11,688 WARN L233 SmtUtils]: Spent 9.24s on a formula simplification. DAG size of input: 95 DAG size of output: 88 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 15:57:27,645 WARN L233 SmtUtils]: Spent 14.68s on a formula simplification. DAG size of input: 106 DAG size of output: 82 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 15:57:27,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:57:27,647 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2022-11-16 15:57:27,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 15:57:27,647 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 1.6290322580645162) internal successors, (101), 62 states have internal predecessors, (101), 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 35 [2022-11-16 15:57:27,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:57:27,648 INFO L225 Difference]: With dead ends: 35 [2022-11-16 15:57:27,648 INFO L226 Difference]: Without dead ends: 0 [2022-11-16 15:57:27,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2010 ImplicationChecksByTransitivity, 260.7s TimeCoverageRelationStatistics Valid=1235, Invalid=7556, Unknown=139, NotChecked=0, Total=8930 [2022-11-16 15:57:27,651 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 15:57:27,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 48 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 15:57:27,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-16 15:57:27,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-16 15:57:27,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:57:27,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-16 15:57:27,652 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2022-11-16 15:57:27,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:57:27,652 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-16 15:57:27,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 1.6290322580645162) internal successors, (101), 62 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:57:27,652 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-16 15:57:27,652 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-16 15:57:27,654 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 9 remaining) [2022-11-16 15:57:27,655 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2022-11-16 15:57:27,655 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2022-11-16 15:57:27,655 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2022-11-16 15:57:27,655 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2022-11-16 15:57:27,655 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 9 remaining) [2022-11-16 15:57:27,655 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 9 remaining) [2022-11-16 15:57:27,656 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 9 remaining) [2022-11-16 15:57:27,656 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2022-11-16 15:57:27,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-16 15:57:27,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 15:57:27,874 INFO L444 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1, 1, 1] [2022-11-16 15:57:27,876 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-16 15:57:27,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 03:57:27 BoogieIcfgContainer [2022-11-16 15:57:27,879 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-16 15:57:27,879 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-16 15:57:27,879 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-16 15:57:27,880 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-16 15:57:27,880 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 03:52:49" (3/4) ... [2022-11-16 15:57:27,883 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-16 15:57:27,893 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2022-11-16 15:57:27,893 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-11-16 15:57:27,893 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-16 15:57:27,894 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-16 15:57:27,933 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/witness.graphml [2022-11-16 15:57:27,933 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-16 15:57:27,934 INFO L158 Benchmark]: Toolchain (without parser) took 279435.02ms. Allocated memory was 90.2MB in the beginning and 243.3MB in the end (delta: 153.1MB). Free memory was 50.8MB in the beginning and 108.5MB in the end (delta: -57.8MB). Peak memory consumption was 93.8MB. Max. memory is 16.1GB. [2022-11-16 15:57:27,934 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 90.2MB. Free memory is still 68.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 15:57:27,936 INFO L158 Benchmark]: CACSL2BoogieTranslator took 521.41ms. Allocated memory was 90.2MB in the beginning and 115.3MB in the end (delta: 25.2MB). Free memory was 50.6MB in the beginning and 86.4MB in the end (delta: -35.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 15:57:27,937 INFO L158 Benchmark]: Boogie Procedure Inliner took 58.22ms. Allocated memory is still 115.3MB. Free memory was 86.4MB in the beginning and 84.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 15:57:27,938 INFO L158 Benchmark]: Boogie Preprocessor took 52.90ms. Allocated memory is still 115.3MB. Free memory was 84.4MB in the beginning and 83.4MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 15:57:27,938 INFO L158 Benchmark]: RCFGBuilder took 611.33ms. Allocated memory is still 115.3MB. Free memory was 83.4MB in the beginning and 68.7MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-16 15:57:27,938 INFO L158 Benchmark]: TraceAbstraction took 278129.34ms. Allocated memory was 115.3MB in the beginning and 243.3MB in the end (delta: 127.9MB). Free memory was 68.2MB in the beginning and 111.0MB in the end (delta: -42.8MB). Peak memory consumption was 87.6MB. Max. memory is 16.1GB. [2022-11-16 15:57:27,939 INFO L158 Benchmark]: Witness Printer took 53.79ms. Allocated memory is still 243.3MB. Free memory was 111.0MB in the beginning and 108.5MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 15:57:27,941 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 90.2MB. Free memory is still 68.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 521.41ms. Allocated memory was 90.2MB in the beginning and 115.3MB in the end (delta: 25.2MB). Free memory was 50.6MB in the beginning and 86.4MB in the end (delta: -35.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 58.22ms. Allocated memory is still 115.3MB. Free memory was 86.4MB in the beginning and 84.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 52.90ms. Allocated memory is still 115.3MB. Free memory was 84.4MB in the beginning and 83.4MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 611.33ms. Allocated memory is still 115.3MB. Free memory was 83.4MB in the beginning and 68.7MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 278129.34ms. Allocated memory was 115.3MB in the beginning and 243.3MB in the end (delta: 127.9MB). Free memory was 68.2MB in the beginning and 111.0MB in the end (delta: -42.8MB). Peak memory consumption was 87.6MB. Max. memory is 16.1GB. * Witness Printer took 53.79ms. Allocated memory is still 243.3MB. Free memory was 111.0MB in the beginning and 108.5MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 553]: 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, 18 locations, 9 error locations. Started 1 CEGAR loops. OverallTime: 278.0s, OverallIterations: 10, TraceHistogramMax: 8, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 177.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 190 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 190 mSDsluCounter, 95 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 105 IncrementalHoareTripleChecker+Unchecked, 47 mSDsCounter, 36 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 455 IncrementalHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 36 mSolverCounterUnsat, 48 mSDtfsCounter, 455 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 309 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3496 ImplicationChecksByTransitivity, 267.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=9, InterpolantAutomatonStates: 97, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 20 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 94.2s InterpolantComputationTime, 167 NumberOfCodeBlocks, 167 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 221 ConstructedInterpolants, 48 QuantifiedInterpolants, 6742 SizeOfPredicates, 72 NumberOfNonLiveVariables, 508 ConjunctsInSsa, 200 ConjunctsInUnsatCore, 18 InterpolantComputations, 6 PerfectInterpolantSequences, 10/466 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! [2022-11-16 15:57:27,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cda88a1-69ef-4dd7-971c-d42e76f91dcd/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE