./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrstr-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrstr-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 991fb09b573d5827d0db553f1ea89a581f5a664ba8b68d6f14a043df738f2f6d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 03:15:00,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 03:15:00,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 03:15:00,042 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 03:15:00,042 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 03:15:00,043 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 03:15:00,044 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 03:15:00,045 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 03:15:00,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 03:15:00,046 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 03:15:00,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 03:15:00,047 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 03:15:00,048 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 03:15:00,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 03:15:00,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 03:15:00,050 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 03:15:00,050 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 03:15:00,051 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 03:15:00,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 03:15:00,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 03:15:00,054 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 03:15:00,055 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 03:15:00,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 03:15:00,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 03:15:00,058 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 03:15:00,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 03:15:00,058 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 03:15:00,059 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 03:15:00,059 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 03:15:00,060 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 03:15:00,060 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 03:15:00,061 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 03:15:00,061 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 03:15:00,061 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 03:15:00,062 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 03:15:00,062 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 03:15:00,063 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 03:15:00,063 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 03:15:00,063 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 03:15:00,063 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 03:15:00,064 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 03:15:00,065 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 03:15:00,079 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 03:15:00,079 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 03:15:00,079 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 03:15:00,079 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 03:15:00,080 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 03:15:00,080 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 03:15:00,086 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 03:15:00,087 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 03:15:00,087 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 03:15:00,087 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 03:15:00,087 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 03:15:00,087 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 03:15:00,088 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 03:15:00,088 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 03:15:00,088 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 03:15:00,088 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 03:15:00,088 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 03:15:00,088 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 03:15:00,089 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 03:15:00,089 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 03:15:00,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 03:15:00,090 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 03:15:00,090 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 03:15:00,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 03:15:00,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 03:15:00,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 03:15:00,090 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 03:15:00,091 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 03:15:00,091 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 03:15:00,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 03:15:00,091 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 03:15:00,091 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 03:15:00,091 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 03:15:00,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 03:15:00,092 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 03:15:00,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 03:15:00,092 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 03:15:00,092 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 03:15:00,093 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 03:15:00,093 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 03:15:00,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 03:15:00,093 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 03:15:00,093 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_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 991fb09b573d5827d0db553f1ea89a581f5a664ba8b68d6f14a043df738f2f6d [2022-12-14 03:15:00,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 03:15:00,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 03:15:00,282 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 03:15:00,283 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 03:15:00,284 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 03:15:00,285 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-memsafety/openbsd_cstrstr-alloca-2.i [2022-12-14 03:15:02,877 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 03:15:03,069 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 03:15:03,069 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/sv-benchmarks/c/array-memsafety/openbsd_cstrstr-alloca-2.i [2022-12-14 03:15:03,076 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/data/21560c351/342de8199b8542ac8af039df4eb0f858/FLAG83a9176ac [2022-12-14 03:15:03,448 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/data/21560c351/342de8199b8542ac8af039df4eb0f858 [2022-12-14 03:15:03,451 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 03:15:03,453 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 03:15:03,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 03:15:03,455 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 03:15:03,459 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 03:15:03,460 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:15:03" (1/1) ... [2022-12-14 03:15:03,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40535c7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:03, skipping insertion in model container [2022-12-14 03:15:03,461 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:15:03" (1/1) ... [2022-12-14 03:15:03,468 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 03:15:03,498 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 03:15:03,711 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 03:15:03,721 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 03:15:03,753 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 03:15:03,776 INFO L208 MainTranslator]: Completed translation [2022-12-14 03:15:03,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:03 WrapperNode [2022-12-14 03:15:03,777 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 03:15:03,778 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 03:15:03,778 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 03:15:03,778 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 03:15:03,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:03" (1/1) ... [2022-12-14 03:15:03,796 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:03" (1/1) ... [2022-12-14 03:15:03,816 INFO L138 Inliner]: procedures = 119, calls = 23, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 160 [2022-12-14 03:15:03,817 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 03:15:03,817 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 03:15:03,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 03:15:03,818 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 03:15:03,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:03" (1/1) ... [2022-12-14 03:15:03,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:03" (1/1) ... [2022-12-14 03:15:03,830 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:03" (1/1) ... [2022-12-14 03:15:03,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:03" (1/1) ... [2022-12-14 03:15:03,838 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:03" (1/1) ... [2022-12-14 03:15:03,841 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:03" (1/1) ... [2022-12-14 03:15:03,843 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:03" (1/1) ... [2022-12-14 03:15:03,844 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:03" (1/1) ... [2022-12-14 03:15:03,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 03:15:03,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 03:15:03,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 03:15:03,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 03:15:03,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:03" (1/1) ... [2022-12-14 03:15:03,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 03:15:03,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:15:03,875 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 03:15:03,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 03:15:03,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 03:15:03,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 03:15:03,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 03:15:03,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 03:15:03,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 03:15:03,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 03:15:03,994 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 03:15:03,995 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 03:15:04,248 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 03:15:04,302 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 03:15:04,302 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-14 03:15:04,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:15:04 BoogieIcfgContainer [2022-12-14 03:15:04,305 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 03:15:04,307 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 03:15:04,308 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 03:15:04,311 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 03:15:04,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:15:03" (1/3) ... [2022-12-14 03:15:04,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c7dd614 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:15:04, skipping insertion in model container [2022-12-14 03:15:04,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:03" (2/3) ... [2022-12-14 03:15:04,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c7dd614 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:15:04, skipping insertion in model container [2022-12-14 03:15:04,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:15:04" (3/3) ... [2022-12-14 03:15:04,314 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrstr-alloca-2.i [2022-12-14 03:15:04,331 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 03:15:04,331 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2022-12-14 03:15:04,362 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 03:15:04,367 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;@ae9aa5f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 03:15:04,367 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2022-12-14 03:15:04,370 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 34 states have (on average 2.176470588235294) internal successors, (74), 59 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:04,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 03:15:04,374 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:04,375 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 03:15:04,375 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:15:04,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:04,379 INFO L85 PathProgramCache]: Analyzing trace with hash 220807, now seen corresponding path program 1 times [2022-12-14 03:15:04,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:04,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589424348] [2022-12-14 03:15:04,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:04,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:04,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:04,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:15:04,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:04,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589424348] [2022-12-14 03:15:04,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589424348] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:15:04,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:15:04,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 03:15:04,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245611054] [2022-12-14 03:15:04,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:15:04,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:15:04,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:04,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:15:04,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:15:04,663 INFO L87 Difference]: Start difference. First operand has 60 states, 34 states have (on average 2.176470588235294) internal successors, (74), 59 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:04,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:04,726 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2022-12-14 03:15:04,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:15:04,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 03:15:04,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:04,734 INFO L225 Difference]: With dead ends: 58 [2022-12-14 03:15:04,734 INFO L226 Difference]: Without dead ends: 57 [2022-12-14 03:15:04,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:15:04,737 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 63 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:04,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 36 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:15:04,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-12-14 03:15:04,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-12-14 03:15:04,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:04,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-12-14 03:15:04,760 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 3 [2022-12-14 03:15:04,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:04,760 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-12-14 03:15:04,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:04,760 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-12-14 03:15:04,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 03:15:04,760 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:04,760 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 03:15:04,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 03:15:04,761 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:15:04,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:04,761 INFO L85 PathProgramCache]: Analyzing trace with hash 220808, now seen corresponding path program 1 times [2022-12-14 03:15:04,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:04,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933213162] [2022-12-14 03:15:04,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:04,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:04,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:04,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:15:04,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:04,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933213162] [2022-12-14 03:15:04,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933213162] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:15:04,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:15:04,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 03:15:04,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094200452] [2022-12-14 03:15:04,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:15:04,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 03:15:04,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:04,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 03:15:04,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 03:15:04,929 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:05,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:05,068 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2022-12-14 03:15:05,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:15:05,068 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 03:15:05,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:05,069 INFO L225 Difference]: With dead ends: 112 [2022-12-14 03:15:05,069 INFO L226 Difference]: Without dead ends: 112 [2022-12-14 03:15:05,069 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 [2022-12-14 03:15:05,070 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 127 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:05,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 109 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:15:05,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-12-14 03:15:05,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 59. [2022-12-14 03:15:05,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 58 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:05,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2022-12-14 03:15:05,075 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 3 [2022-12-14 03:15:05,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:05,075 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2022-12-14 03:15:05,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:05,075 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2022-12-14 03:15:05,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 03:15:05,076 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:05,076 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 03:15:05,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 03:15:05,076 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:15:05,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:05,077 INFO L85 PathProgramCache]: Analyzing trace with hash 7020437, now seen corresponding path program 1 times [2022-12-14 03:15:05,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:05,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577790081] [2022-12-14 03:15:05,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:05,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:05,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:05,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:15:05,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:05,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577790081] [2022-12-14 03:15:05,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577790081] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:15:05,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:15:05,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 03:15:05,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014460670] [2022-12-14 03:15:05,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:15:05,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 03:15:05,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:05,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 03:15:05,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 03:15:05,120 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:05,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:05,153 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2022-12-14 03:15:05,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 03:15:05,153 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 03:15:05,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:05,154 INFO L225 Difference]: With dead ends: 63 [2022-12-14 03:15:05,154 INFO L226 Difference]: Without dead ends: 63 [2022-12-14 03:15:05,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 03:15:05,156 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 69 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:05,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 100 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:15:05,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-12-14 03:15:05,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2022-12-14 03:15:05,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 59 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:05,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-12-14 03:15:05,161 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 4 [2022-12-14 03:15:05,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:05,161 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-12-14 03:15:05,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:05,162 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-12-14 03:15:05,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 03:15:05,162 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:05,162 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 03:15:05,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 03:15:05,162 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:15:05,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:05,163 INFO L85 PathProgramCache]: Analyzing trace with hash 7015653, now seen corresponding path program 1 times [2022-12-14 03:15:05,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:05,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178462419] [2022-12-14 03:15:05,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:05,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:05,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:15:05,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:05,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178462419] [2022-12-14 03:15:05,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178462419] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:15:05,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:15:05,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 03:15:05,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434587853] [2022-12-14 03:15:05,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:15:05,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:15:05,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:05,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:15:05,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:15:05,200 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:05,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:05,233 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2022-12-14 03:15:05,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:15:05,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 03:15:05,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:05,234 INFO L225 Difference]: With dead ends: 58 [2022-12-14 03:15:05,234 INFO L226 Difference]: Without dead ends: 58 [2022-12-14 03:15:05,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:15:05,236 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 60 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:05,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 36 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:15:05,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-14 03:15:05,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-12-14 03:15:05,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.864864864864865) internal successors, (69), 57 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:05,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2022-12-14 03:15:05,241 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 4 [2022-12-14 03:15:05,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:05,241 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2022-12-14 03:15:05,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:05,242 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2022-12-14 03:15:05,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 03:15:05,242 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:05,242 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 03:15:05,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 03:15:05,243 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:15:05,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:05,243 INFO L85 PathProgramCache]: Analyzing trace with hash 7015654, now seen corresponding path program 1 times [2022-12-14 03:15:05,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:05,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881576011] [2022-12-14 03:15:05,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:05,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:15:05,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:05,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881576011] [2022-12-14 03:15:05,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881576011] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:15:05,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:15:05,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 03:15:05,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859819947] [2022-12-14 03:15:05,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:15:05,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:15:05,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:05,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:15:05,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:15:05,292 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:05,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:05,322 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2022-12-14 03:15:05,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:15:05,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 03:15:05,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:05,322 INFO L225 Difference]: With dead ends: 58 [2022-12-14 03:15:05,323 INFO L226 Difference]: Without dead ends: 58 [2022-12-14 03:15:05,323 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 [2022-12-14 03:15:05,324 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 1 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:05,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 97 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:15:05,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-14 03:15:05,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-12-14 03:15:05,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.837837837837838) internal successors, (68), 57 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:05,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2022-12-14 03:15:05,329 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 4 [2022-12-14 03:15:05,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:05,329 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2022-12-14 03:15:05,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:05,330 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2022-12-14 03:15:05,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 03:15:05,330 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:05,330 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2022-12-14 03:15:05,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 03:15:05,331 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:15:05,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:05,331 INFO L85 PathProgramCache]: Analyzing trace with hash 212351948, now seen corresponding path program 1 times [2022-12-14 03:15:05,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:05,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540186987] [2022-12-14 03:15:05,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:05,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:05,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:15:05,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:05,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540186987] [2022-12-14 03:15:05,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540186987] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:15:05,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494438911] [2022-12-14 03:15:05,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:05,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:05,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:15:05,552 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:15:05,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 03:15:05,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:05,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 03:15:05,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:15:05,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:05,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-12-14 03:15:05,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 03:15:05,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:15:05,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:15:05,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:15:05,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494438911] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:15:05,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2020913500] [2022-12-14 03:15:05,937 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-12-14 03:15:05,937 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:15:05,941 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:15:05,946 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:15:05,946 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:15:06,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:06,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:15:06,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:15:06,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:06,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:06,188 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:15:06,379 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '758#(and (not (<= (+ |ULTIMATE.start_main_~nondetString1~0#1.offset| |ULTIMATE.start_main_~i~0#1| 1) (select |#length| |ULTIMATE.start_main_~nondetString1~0#1.base|))) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet25#1|)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_#t~nondet25#1| 127) (= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 03:15:06,379 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:15:06,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:15:06,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-12-14 03:15:06,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448860226] [2022-12-14 03:15:06,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:15:06,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 03:15:06,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:06,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 03:15:06,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-12-14 03:15:06,381 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:06,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:06,528 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2022-12-14 03:15:06,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 03:15:06,528 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 03:15:06,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:06,529 INFO L225 Difference]: With dead ends: 56 [2022-12-14 03:15:06,529 INFO L226 Difference]: Without dead ends: 56 [2022-12-14 03:15:06,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-12-14 03:15:06,530 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 61 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:06,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 136 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:15:06,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-12-14 03:15:06,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-12-14 03:15:06,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 54 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:06,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2022-12-14 03:15:06,534 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 5 [2022-12-14 03:15:06,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:06,535 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2022-12-14 03:15:06,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:06,535 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2022-12-14 03:15:06,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 03:15:06,535 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:06,536 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 03:15:06,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 03:15:06,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:06,736 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:15:06,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:06,737 INFO L85 PathProgramCache]: Analyzing trace with hash -2006853598, now seen corresponding path program 1 times [2022-12-14 03:15:06,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:06,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087385783] [2022-12-14 03:15:06,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:06,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:06,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:06,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:15:06,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:06,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087385783] [2022-12-14 03:15:06,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087385783] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:15:06,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:15:06,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 03:15:06,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670443184] [2022-12-14 03:15:06,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:15:06,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 03:15:06,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:06,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 03:15:06,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:15:06,850 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:06,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:06,930 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2022-12-14 03:15:06,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 03:15:06,930 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 03:15:06,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:06,931 INFO L225 Difference]: With dead ends: 56 [2022-12-14 03:15:06,931 INFO L226 Difference]: Without dead ends: 56 [2022-12-14 03:15:06,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:15:06,932 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 61 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:06,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 102 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:15:06,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-12-14 03:15:06,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-12-14 03:15:06,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:06,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-12-14 03:15:06,935 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 6 [2022-12-14 03:15:06,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:06,936 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-12-14 03:15:06,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:06,936 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-12-14 03:15:06,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 03:15:06,936 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:06,936 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-12-14 03:15:06,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 03:15:06,937 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:15:06,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:06,937 INFO L85 PathProgramCache]: Analyzing trace with hash -145849192, now seen corresponding path program 1 times [2022-12-14 03:15:06,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:06,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704838487] [2022-12-14 03:15:06,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:06,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:06,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:07,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:15:07,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:07,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704838487] [2022-12-14 03:15:07,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704838487] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:15:07,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809519912] [2022-12-14 03:15:07,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:07,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:07,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:15:07,107 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:15:07,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 03:15:07,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:07,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 03:15:07,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:15:07,186 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-14 03:15:07,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2022-12-14 03:15:07,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:15:07,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:15:07,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:15:07,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809519912] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:15:07,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [97456408] [2022-12-14 03:15:07,460 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-12-14 03:15:07,461 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:15:07,461 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:15:07,461 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:15:07,461 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:15:07,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:07,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:15:07,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:15:07,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:07,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:07,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:07,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:07,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:07,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:07,801 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:15:08,196 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1051#(and (not (<= (+ |ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~i~1#1| 1) (select |#length| |ULTIMATE.start_main_~nondetString2~0#1.base|))) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_#t~nondet27#1| 127) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet27#1|)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.offset|) (= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 03:15:08,196 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:15:08,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:15:08,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2022-12-14 03:15:08,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141937462] [2022-12-14 03:15:08,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:15:08,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 03:15:08,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:08,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 03:15:08,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-12-14 03:15:08,198 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:08,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:08,330 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2022-12-14 03:15:08,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 03:15:08,331 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 03:15:08,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:08,331 INFO L225 Difference]: With dead ends: 54 [2022-12-14 03:15:08,331 INFO L226 Difference]: Without dead ends: 54 [2022-12-14 03:15:08,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-12-14 03:15:08,332 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 56 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:08,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 104 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:15:08,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-12-14 03:15:08,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-12-14 03:15:08,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.75) internal successors, (63), 52 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:08,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2022-12-14 03:15:08,335 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 8 [2022-12-14 03:15:08,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:08,335 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2022-12-14 03:15:08,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:08,335 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2022-12-14 03:15:08,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 03:15:08,335 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:08,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:15:08,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 03:15:08,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 03:15:08,537 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:15:08,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:08,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1577447746, now seen corresponding path program 1 times [2022-12-14 03:15:08,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:08,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97249078] [2022-12-14 03:15:08,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:08,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:08,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:15:08,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:08,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97249078] [2022-12-14 03:15:08,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97249078] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:15:08,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:15:08,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 03:15:08,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077229932] [2022-12-14 03:15:08,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:15:08,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 03:15:08,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:08,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 03:15:08,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 03:15:08,672 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:08,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:08,725 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2022-12-14 03:15:08,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 03:15:08,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2022-12-14 03:15:08,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:08,726 INFO L225 Difference]: With dead ends: 52 [2022-12-14 03:15:08,726 INFO L226 Difference]: Without dead ends: 52 [2022-12-14 03:15:08,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:15:08,727 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 56 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:08,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 63 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:15:08,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-12-14 03:15:08,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-12-14 03:15:08,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:08,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2022-12-14 03:15:08,731 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 10 [2022-12-14 03:15:08,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:08,731 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2022-12-14 03:15:08,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:08,731 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2022-12-14 03:15:08,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 03:15:08,731 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:08,731 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:15:08,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 03:15:08,732 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:15:08,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:08,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1577447747, now seen corresponding path program 1 times [2022-12-14 03:15:08,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:08,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974968400] [2022-12-14 03:15:08,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:08,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:08,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:08,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:15:08,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:08,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974968400] [2022-12-14 03:15:08,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974968400] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:15:08,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095640254] [2022-12-14 03:15:08,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:08,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:08,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:15:08,856 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:15:08,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 03:15:08,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:08,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 03:15:08,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:15:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:15:08,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:15:08,969 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 21 treesize of output 17 [2022-12-14 03:15:08,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:15:08,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095640254] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:15:08,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [470399851] [2022-12-14 03:15:08,988 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 03:15:08,988 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:15:08,988 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:15:08,989 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:15:08,989 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:15:09,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:09,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:15:09,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:15:09,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:09,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:09,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:15:09,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:09,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:09,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:09,406 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:15:09,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:15:09,433 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:15:10,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [470399851] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:15:10,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:15:10,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 4, 4] total 14 [2022-12-14 03:15:10,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075581580] [2022-12-14 03:15:10,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:15:10,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 03:15:10,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:10,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 03:15:10,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-12-14 03:15:10,116 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:10,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:10,310 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2022-12-14 03:15:10,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 03:15:10,311 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2022-12-14 03:15:10,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:10,312 INFO L225 Difference]: With dead ends: 51 [2022-12-14 03:15:10,312 INFO L226 Difference]: Without dead ends: 51 [2022-12-14 03:15:10,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-12-14 03:15:10,312 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 95 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:10,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 87 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 03:15:10,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-12-14 03:15:10,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-12-14 03:15:10,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:10,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2022-12-14 03:15:10,315 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 10 [2022-12-14 03:15:10,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:10,315 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2022-12-14 03:15:10,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:10,315 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2022-12-14 03:15:10,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 03:15:10,315 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:10,315 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:15:10,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 03:15:10,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 03:15:10,517 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:15:10,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:10,518 INFO L85 PathProgramCache]: Analyzing trace with hash -196054209, now seen corresponding path program 1 times [2022-12-14 03:15:10,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:10,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964314583] [2022-12-14 03:15:10,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:10,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:10,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:10,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:15:10,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:10,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964314583] [2022-12-14 03:15:10,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964314583] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:15:10,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:15:10,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 03:15:10,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476055700] [2022-12-14 03:15:10,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:15:10,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 03:15:10,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:10,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 03:15:10,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:15:10,597 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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) [2022-12-14 03:15:10,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:10,642 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2022-12-14 03:15:10,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 03:15:10,642 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 03:15:10,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:10,643 INFO L225 Difference]: With dead ends: 52 [2022-12-14 03:15:10,643 INFO L226 Difference]: Without dead ends: 52 [2022-12-14 03:15:10,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 03:15:10,644 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 141 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:10,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 37 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:15:10,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-12-14 03:15:10,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2022-12-14 03:15:10,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:10,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-12-14 03:15:10,647 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 12 [2022-12-14 03:15:10,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:10,647 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-12-14 03:15:10,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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) [2022-12-14 03:15:10,647 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-12-14 03:15:10,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 03:15:10,648 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:10,648 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:15:10,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 03:15:10,648 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:15:10,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:10,649 INFO L85 PathProgramCache]: Analyzing trace with hash -196054208, now seen corresponding path program 1 times [2022-12-14 03:15:10,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:10,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078124437] [2022-12-14 03:15:10,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:10,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:10,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:10,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:15:10,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:10,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078124437] [2022-12-14 03:15:10,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078124437] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:15:10,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329377326] [2022-12-14 03:15:10,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:10,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:10,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:15:10,878 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:15:10,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 03:15:10,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:10,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 03:15:10,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:15:10,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:11,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:15:11,036 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:15:11,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-12-14 03:15:11,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:15:11,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:15:11,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-12-14 03:15:11,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-14 03:15:11,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:15:11,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329377326] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:15:11,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1893365207] [2022-12-14 03:15:11,191 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 03:15:11,191 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:15:11,192 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:15:11,192 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:15:11,192 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:15:11,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:11,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:15:11,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:11,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:11,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:11,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:15:11,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:11,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:11,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:11,569 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:15:11,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:15:11,622 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:15:12,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1893365207] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:15:12,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:15:12,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 7, 7] total 26 [2022-12-14 03:15:12,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010803630] [2022-12-14 03:15:12,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:15:12,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 03:15:12,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:12,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 03:15:12,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-12-14 03:15:12,928 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 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) [2022-12-14 03:15:13,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:13,171 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2022-12-14 03:15:13,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 03:15:13,171 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 03:15:13,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:13,172 INFO L225 Difference]: With dead ends: 55 [2022-12-14 03:15:13,172 INFO L226 Difference]: Without dead ends: 55 [2022-12-14 03:15:13,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-12-14 03:15:13,172 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 192 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:13,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 111 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 03:15:13,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-14 03:15:13,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2022-12-14 03:15:13,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:13,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2022-12-14 03:15:13,174 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 12 [2022-12-14 03:15:13,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:13,174 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2022-12-14 03:15:13,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 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) [2022-12-14 03:15:13,174 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2022-12-14 03:15:13,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 03:15:13,175 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:13,175 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:15:13,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 03:15:13,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:13,377 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:15:13,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:13,378 INFO L85 PathProgramCache]: Analyzing trace with hash 570471050, now seen corresponding path program 1 times [2022-12-14 03:15:13,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:13,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979799531] [2022-12-14 03:15:13,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:13,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:13,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:15:13,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:13,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979799531] [2022-12-14 03:15:13,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979799531] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:15:13,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713813556] [2022-12-14 03:15:13,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:13,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:13,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:15:13,717 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:15:13,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 03:15:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:13,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 03:15:13,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:15:13,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 03:15:13,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:15:13,912 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:15:13,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-12-14 03:15:13,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 03:15:13,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:15:13,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-12-14 03:15:13,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-14 03:15:14,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 03:15:14,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713813556] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:15:14,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [366410020] [2022-12-14 03:15:14,032 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 03:15:14,032 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:15:14,032 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:15:14,032 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:15:14,032 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:15:14,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:14,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:15:14,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:14,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:14,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:14,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:15:14,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:14,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:14,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:14,342 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:15:14,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:15:14,543 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:15:16,705 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1861#(and (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= |ULTIMATE.start_cstrstr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~s#1.offset|) (not (<= (+ |ULTIMATE.start_cstrlen_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlen_~s~0#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 03:15:16,705 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:15:16,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:15:16,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2022-12-14 03:15:16,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768326553] [2022-12-14 03:15:16,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:15:16,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 03:15:16,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:16,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 03:15:16,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 03:15:16,708 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:17,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:17,365 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2022-12-14 03:15:17,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 03:15:17,365 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 03:15:17,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:17,365 INFO L225 Difference]: With dead ends: 66 [2022-12-14 03:15:17,365 INFO L226 Difference]: Without dead ends: 66 [2022-12-14 03:15:17,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=248, Invalid=1644, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 03:15:17,366 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 177 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:17,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 459 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 03:15:17,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-12-14 03:15:17,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2022-12-14 03:15:17,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 43 states have (on average 1.5813953488372092) internal successors, (68), 56 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:17,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2022-12-14 03:15:17,368 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 14 [2022-12-14 03:15:17,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:17,368 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2022-12-14 03:15:17,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:17,368 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2022-12-14 03:15:17,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 03:15:17,368 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:17,368 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:15:17,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 03:15:17,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 03:15:17,570 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:15:17,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:17,571 INFO L85 PathProgramCache]: Analyzing trace with hash 573697790, now seen corresponding path program 1 times [2022-12-14 03:15:17,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:17,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908141154] [2022-12-14 03:15:17,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:17,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 03:15:17,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:17,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908141154] [2022-12-14 03:15:17,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908141154] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:15:17,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:15:17,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 03:15:17,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810931666] [2022-12-14 03:15:17,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:15:17,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 03:15:17,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:17,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 03:15:17,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 03:15:17,678 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:17,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:17,714 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2022-12-14 03:15:17,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 03:15:17,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-12-14 03:15:17,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:17,715 INFO L225 Difference]: With dead ends: 56 [2022-12-14 03:15:17,715 INFO L226 Difference]: Without dead ends: 48 [2022-12-14 03:15:17,715 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 [2022-12-14 03:15:17,716 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 44 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:17,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 64 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:15:17,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-12-14 03:15:17,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-12-14 03:15:17,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.6) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:17,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-12-14 03:15:17,718 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 14 [2022-12-14 03:15:17,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:17,718 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-12-14 03:15:17,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:17,718 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-12-14 03:15:17,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 03:15:17,719 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:17,719 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:15:17,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 03:15:17,719 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:15:17,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:17,720 INFO L85 PathProgramCache]: Analyzing trace with hash 923568384, now seen corresponding path program 2 times [2022-12-14 03:15:17,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:17,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554644012] [2022-12-14 03:15:17,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:17,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:17,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:18,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:15:18,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:18,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554644012] [2022-12-14 03:15:18,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554644012] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:15:18,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713357384] [2022-12-14 03:15:18,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 03:15:18,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:18,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:15:18,130 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:15:18,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 03:15:18,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 03:15:18,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:15:18,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 03:15:18,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:15:18,209 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 03:15:18,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 03:15:18,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:18,362 INFO L321 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2022-12-14 03:15:18,362 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 28 treesize of output 23 [2022-12-14 03:15:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 03:15:18,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:15:18,558 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 [2022-12-14 03:15:18,563 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 [2022-12-14 03:15:18,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 03:15:18,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713357384] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:15:18,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1978734206] [2022-12-14 03:15:18,636 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 03:15:18,637 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:15:18,637 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:15:18,637 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:15:18,637 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:15:18,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:18,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:15:18,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:15:18,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:18,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:18,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:18,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:18,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:18,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:18,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:18,936 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:15:18,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:15:19,252 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:15:21,747 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2240#(and (<= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= |ULTIMATE.start_cstrstr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~s#1.offset|) (<= 2 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |#NULL.offset|) (not (<= (+ |ULTIMATE.start_cstrlen_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlen_~s~0#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|))' at error location [2022-12-14 03:15:21,747 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:15:21,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:15:21,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 27 [2022-12-14 03:15:21,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248042170] [2022-12-14 03:15:21,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:15:21,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 03:15:21,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:21,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 03:15:21,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 03:15:21,749 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:23,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:23,211 INFO L93 Difference]: Finished difference Result 153 states and 179 transitions. [2022-12-14 03:15:23,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 03:15:23,211 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 03:15:23,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:23,212 INFO L225 Difference]: With dead ends: 153 [2022-12-14 03:15:23,212 INFO L226 Difference]: Without dead ends: 153 [2022-12-14 03:15:23,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=538, Invalid=2542, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 03:15:23,213 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1581 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1581 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:23,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1581 Valid, 409 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 03:15:23,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-12-14 03:15:23,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 58. [2022-12-14 03:15:23,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 45 states have (on average 1.511111111111111) internal successors, (68), 57 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:23,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2022-12-14 03:15:23,214 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 16 [2022-12-14 03:15:23,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:23,215 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2022-12-14 03:15:23,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:23,215 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2022-12-14 03:15:23,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 03:15:23,215 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:23,215 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:15:23,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 03:15:23,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 03:15:23,417 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:15:23,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:23,418 INFO L85 PathProgramCache]: Analyzing trace with hash 364175612, now seen corresponding path program 1 times [2022-12-14 03:15:23,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:23,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640761045] [2022-12-14 03:15:23,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:23,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:23,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:15:23,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:23,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640761045] [2022-12-14 03:15:23,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640761045] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:15:23,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:15:23,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 03:15:23,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803653195] [2022-12-14 03:15:23,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:15:23,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 03:15:23,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:23,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 03:15:23,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:15:23,480 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:23,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:23,525 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2022-12-14 03:15:23,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 03:15:23,525 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 03:15:23,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:23,525 INFO L225 Difference]: With dead ends: 57 [2022-12-14 03:15:23,526 INFO L226 Difference]: Without dead ends: 57 [2022-12-14 03:15:23,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 03:15:23,526 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 79 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:23,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 49 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:15:23,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-12-14 03:15:23,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-12-14 03:15:23,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.488888888888889) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:23,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-12-14 03:15:23,529 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 19 [2022-12-14 03:15:23,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:23,529 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-12-14 03:15:23,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:23,529 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-12-14 03:15:23,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 03:15:23,530 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:23,530 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:15:23,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 03:15:23,530 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:15:23,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:23,531 INFO L85 PathProgramCache]: Analyzing trace with hash 364175613, now seen corresponding path program 1 times [2022-12-14 03:15:23,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:23,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884446145] [2022-12-14 03:15:23,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:23,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:23,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:15:23,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:23,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884446145] [2022-12-14 03:15:23,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884446145] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:15:23,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025518766] [2022-12-14 03:15:23,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:23,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:23,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:15:23,625 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:15:23,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 03:15:23,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:23,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 03:15:23,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:15:23,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:15:23,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:15:23,794 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 21 treesize of output 17 [2022-12-14 03:15:23,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:15:23,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025518766] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:15:23,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1609464005] [2022-12-14 03:15:23,805 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 03:15:23,805 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:15:23,806 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:15:23,806 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:15:23,806 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:15:23,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:23,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:15:23,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:15:23,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:23,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:23,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2022-12-14 03:15:23,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:24,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:24,054 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:15:24,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:15:24,168 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:15:26,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1609464005] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:15:26,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:15:26,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [4, 4, 4] total 18 [2022-12-14 03:15:26,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054140140] [2022-12-14 03:15:26,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:15:26,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 03:15:26,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:26,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 03:15:26,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2022-12-14 03:15:26,270 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:26,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:26,517 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2022-12-14 03:15:26,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 03:15:26,517 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 03:15:26,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:26,517 INFO L225 Difference]: With dead ends: 62 [2022-12-14 03:15:26,517 INFO L226 Difference]: Without dead ends: 62 [2022-12-14 03:15:26,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2022-12-14 03:15:26,518 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 127 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:26,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 109 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 03:15:26,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-12-14 03:15:26,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-12-14 03:15:26,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:26,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-12-14 03:15:26,519 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 19 [2022-12-14 03:15:26,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:26,519 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-12-14 03:15:26,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:26,519 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-12-14 03:15:26,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 03:15:26,520 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:26,520 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:15:26,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 03:15:26,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:26,722 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:15:26,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:26,723 INFO L85 PathProgramCache]: Analyzing trace with hash 197002176, now seen corresponding path program 3 times [2022-12-14 03:15:26,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:26,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568765772] [2022-12-14 03:15:26,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:26,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:26,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:27,039 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:15:27,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:27,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568765772] [2022-12-14 03:15:27,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568765772] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:15:27,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330695256] [2022-12-14 03:15:27,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 03:15:27,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:27,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:15:27,040 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:15:27,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 03:15:27,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 03:15:27,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:15:27,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-14 03:15:27,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:15:27,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:27,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 03:15:27,244 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:15:27,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:15:27,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-14 03:15:27,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 03:15:27,341 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:15:27,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330695256] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:15:27,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [593514522] [2022-12-14 03:15:27,343 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 03:15:27,343 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:15:27,343 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:15:27,344 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:15:27,344 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:15:27,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:27,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:15:27,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:15:27,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:27,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:27,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:15:27,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:27,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:27,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:27,591 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:15:27,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:15:27,759 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:15:29,528 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3008#(and (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= |ULTIMATE.start_cstrstr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~s#1.offset|) (not (<= (+ |ULTIMATE.start_cstrlen_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlen_~s~0#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 03:15:29,528 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:15:29,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:15:29,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 22 [2022-12-14 03:15:29,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755053228] [2022-12-14 03:15:29,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:15:29,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 03:15:29,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:29,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 03:15:29,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2022-12-14 03:15:29,530 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:30,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:30,043 INFO L93 Difference]: Finished difference Result 168 states and 195 transitions. [2022-12-14 03:15:30,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 03:15:30,043 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-12-14 03:15:30,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:30,044 INFO L225 Difference]: With dead ends: 168 [2022-12-14 03:15:30,044 INFO L226 Difference]: Without dead ends: 168 [2022-12-14 03:15:30,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=256, Invalid=1724, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 03:15:30,045 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 768 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:30,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [768 Valid, 1161 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 03:15:30,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-12-14 03:15:30,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 71. [2022-12-14 03:15:30,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 59 states have (on average 1.4067796610169492) internal successors, (83), 70 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:30,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2022-12-14 03:15:30,046 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 20 [2022-12-14 03:15:30,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:30,046 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2022-12-14 03:15:30,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:30,047 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2022-12-14 03:15:30,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 03:15:30,047 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:30,047 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:15:30,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 03:15:30,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 03:15:30,249 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:15:30,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:30,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1003443786, now seen corresponding path program 4 times [2022-12-14 03:15:30,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:30,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69167655] [2022-12-14 03:15:30,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:30,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:30,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:30,472 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:15:30,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:30,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69167655] [2022-12-14 03:15:30,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69167655] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:15:30,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807814683] [2022-12-14 03:15:30,473 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 03:15:30,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:30,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:15:30,474 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:15:30,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 03:15:30,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:30,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-14 03:15:30,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:15:30,599 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:15:30,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:15:30,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 03:15:30,719 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:15:30,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807814683] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:15:30,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [357609633] [2022-12-14 03:15:30,720 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 03:15:30,720 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:15:30,721 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:15:30,721 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:15:30,721 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:15:30,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:30,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:15:30,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:15:30,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:30,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:30,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:30,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:30,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:30,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:30,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:30,997 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:15:30,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:15:31,264 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:15:32,880 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3429#(and (<= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= |ULTIMATE.start_cstrstr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~s#1.offset|) (<= 2 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |#NULL.offset|) (not (<= (+ |ULTIMATE.start_cstrlen_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlen_~s~0#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|))' at error location [2022-12-14 03:15:32,880 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:15:32,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:15:32,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-12-14 03:15:32,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486716054] [2022-12-14 03:15:32,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:15:32,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 03:15:32,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:32,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 03:15:32,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2022-12-14 03:15:32,882 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:33,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:33,317 INFO L93 Difference]: Finished difference Result 231 states and 270 transitions. [2022-12-14 03:15:33,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 03:15:33,318 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-14 03:15:33,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:33,318 INFO L225 Difference]: With dead ends: 231 [2022-12-14 03:15:33,318 INFO L226 Difference]: Without dead ends: 231 [2022-12-14 03:15:33,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=257, Invalid=1383, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 03:15:33,319 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 857 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:33,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [857 Valid, 775 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 03:15:33,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-12-14 03:15:33,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 73. [2022-12-14 03:15:33,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 61 states have (on average 1.4098360655737705) internal successors, (86), 72 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:33,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2022-12-14 03:15:33,321 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 22 [2022-12-14 03:15:33,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:33,321 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2022-12-14 03:15:33,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:33,322 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2022-12-14 03:15:33,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 03:15:33,322 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:33,322 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:15:33,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 03:15:33,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:33,524 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:15:33,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:33,525 INFO L85 PathProgramCache]: Analyzing trace with hash -2086966907, now seen corresponding path program 1 times [2022-12-14 03:15:33,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:33,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970807099] [2022-12-14 03:15:33,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:33,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:34,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:15:34,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:34,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970807099] [2022-12-14 03:15:34,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970807099] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:15:34,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624719144] [2022-12-14 03:15:34,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:34,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:34,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:15:34,074 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:15:34,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 03:15:34,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:34,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-14 03:15:34,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:15:34,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:34,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:34,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-12-14 03:15:34,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:15:34,567 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:15:34,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-12-14 03:15:34,586 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:15:34,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:15:34,681 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 73 treesize of output 69 [2022-12-14 03:15:34,938 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:15:34,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624719144] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:15:34,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1321150858] [2022-12-14 03:15:34,940 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 03:15:34,940 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:15:34,940 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:15:34,941 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:15:34,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:15:34,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:34,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:15:34,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:15:35,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:35,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:15:35,073 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 03:15:35,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 76 [2022-12-14 03:15:35,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:35,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:35,163 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:15:35,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:15:35,459 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:15:38,472 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3934#(and (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#res#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_cstrstr_~s#1.offset|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= |ULTIMATE.start_cstrlen_~s~0#1.offset| 1) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= |ULTIMATE.start_cstrstr_~len~0#1| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrstr_#t~post17#1.base|) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrstr_~len~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrlen_#res#1| 0) (<= 0 |ULTIMATE.start_cstrstr_#t~post17#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (= |#NULL.offset| 0) (< (select |#length| |ULTIMATE.start_cstrstr_#t~post17#1.base|) (+ |ULTIMATE.start_cstrstr_#t~post17#1.offset| 1)) (= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 03:15:38,472 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:15:38,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:15:38,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 13] total 37 [2022-12-14 03:15:38,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679325251] [2022-12-14 03:15:38,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:15:38,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-14 03:15:38,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:38,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-14 03:15:38,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2720, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 03:15:38,474 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand has 38 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 37 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:39,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:39,930 INFO L93 Difference]: Finished difference Result 126 states and 145 transitions. [2022-12-14 03:15:39,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 03:15:39,930 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 37 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-12-14 03:15:39,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:39,931 INFO L225 Difference]: With dead ends: 126 [2022-12-14 03:15:39,931 INFO L226 Difference]: Without dead ends: 110 [2022-12-14 03:15:39,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1469 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=547, Invalid=4145, Unknown=0, NotChecked=0, Total=4692 [2022-12-14 03:15:39,932 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 295 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:39,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 599 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 03:15:39,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-12-14 03:15:39,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2022-12-14 03:15:39,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 95 states have (on average 1.3263157894736841) internal successors, (126), 106 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:39,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 126 transitions. [2022-12-14 03:15:39,934 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 126 transitions. Word has length 23 [2022-12-14 03:15:39,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:39,934 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 126 transitions. [2022-12-14 03:15:39,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 37 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:39,934 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 126 transitions. [2022-12-14 03:15:39,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 03:15:39,934 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:39,934 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:15:39,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 03:15:40,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:40,136 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:15:40,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:40,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1865444925, now seen corresponding path program 1 times [2022-12-14 03:15:40,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:40,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700035041] [2022-12-14 03:15:40,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:40,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:40,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:40,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 03:15:40,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:40,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700035041] [2022-12-14 03:15:40,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700035041] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:15:40,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071464226] [2022-12-14 03:15:40,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:40,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:40,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:15:40,242 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:15:40,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 03:15:40,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:40,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 03:15:40,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:15:40,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 03:15:40,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:15:40,412 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 21 treesize of output 17 [2022-12-14 03:15:40,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 03:15:40,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071464226] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:15:40,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [132449357] [2022-12-14 03:15:40,422 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 03:15:40,422 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:15:40,422 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:15:40,422 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:15:40,422 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:15:40,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:40,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:15:40,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:15:40,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:40,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:40,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2022-12-14 03:15:40,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:40,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:40,621 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:15:40,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:15:40,779 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:15:42,278 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4351#(and (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (= |ULTIMATE.start_cstrstr_~s#1.base| |ULTIMATE.start_cstrstr_#t~post17#1.base|) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (= |ULTIMATE.start_cstrlen_~s~0#1.offset| (+ |ULTIMATE.start_cstrlen_#res#1| |ULTIMATE.start_cstrlen_~str#1.offset|)) (= (+ |ULTIMATE.start_cstrstr_#t~post17#1.offset| 1) |ULTIMATE.start_cstrstr_~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrstr_#t~post17#1.base|) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_cstrstr_#t~post17#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#t~post17#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.offset|) (< (select |#length| |ULTIMATE.start_cstrstr_#t~post17#1.base|) (+ |ULTIMATE.start_cstrstr_#t~post17#1.offset| 1)) (= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |ULTIMATE.start_cstrlen_#res#1| |ULTIMATE.start_cstrstr_~len~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 03:15:42,279 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:15:42,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:15:42,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-12-14 03:15:42,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109052334] [2022-12-14 03:15:42,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:15:42,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 03:15:42,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:42,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 03:15:42,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-12-14 03:15:42,280 INFO L87 Difference]: Start difference. First operand 107 states and 126 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:42,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:42,370 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2022-12-14 03:15:42,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 03:15:42,370 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-12-14 03:15:42,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:42,371 INFO L225 Difference]: With dead ends: 110 [2022-12-14 03:15:42,371 INFO L226 Difference]: Without dead ends: 98 [2022-12-14 03:15:42,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2022-12-14 03:15:42,372 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 99 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:42,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 88 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:15:42,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-12-14 03:15:42,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2022-12-14 03:15:42,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 80 states have (on average 1.35) internal successors, (108), 91 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:42,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 108 transitions. [2022-12-14 03:15:42,374 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 108 transitions. Word has length 23 [2022-12-14 03:15:42,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:42,374 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 108 transitions. [2022-12-14 03:15:42,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:42,374 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 108 transitions. [2022-12-14 03:15:42,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 03:15:42,375 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:42,375 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:15:42,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 03:15:42,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:42,576 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:15:42,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:42,577 INFO L85 PathProgramCache]: Analyzing trace with hash 2058167168, now seen corresponding path program 5 times [2022-12-14 03:15:42,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:42,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633484042] [2022-12-14 03:15:42,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:42,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:42,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:42,897 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:15:42,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:42,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633484042] [2022-12-14 03:15:42,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633484042] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:15:42,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697325748] [2022-12-14 03:15:42,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 03:15:42,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:42,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:15:42,898 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:15:42,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 03:15:42,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 03:15:42,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:15:42,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-14 03:15:42,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:15:43,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:43,470 INFO L321 Elim1Store]: treesize reduction 12, result has 87.1 percent of original size [2022-12-14 03:15:43,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 99 [2022-12-14 03:15:43,811 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 03:15:43,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:15:44,307 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 53 treesize of output 45 [2022-12-14 03:15:44,334 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:15:44,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 117 [2022-12-14 03:15:44,357 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 665 treesize of output 567 [2022-12-14 03:15:44,438 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 03:15:44,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697325748] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:15:44,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [771234079] [2022-12-14 03:15:44,439 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 03:15:44,439 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:15:44,439 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:15:44,439 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:15:44,439 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:15:44,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:44,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:15:44,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:15:44,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:44,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:44,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:44,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:44,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:44,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:44,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:15:44,721 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:15:44,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:15:44,986 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:15:47,071 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4745#(and (<= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= |ULTIMATE.start_cstrstr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~s#1.offset|) (<= 2 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |#NULL.offset|) (not (<= (+ |ULTIMATE.start_cstrlen_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlen_~s~0#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|))' at error location [2022-12-14 03:15:47,071 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:15:47,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:15:47,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 10] total 33 [2022-12-14 03:15:47,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693086753] [2022-12-14 03:15:47,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:15:47,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 03:15:47,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:47,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 03:15:47,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1796, Unknown=1, NotChecked=0, Total=1980 [2022-12-14 03:15:47,073 INFO L87 Difference]: Start difference. First operand 92 states and 108 transitions. Second operand has 34 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 33 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:03,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:16:03,525 INFO L93 Difference]: Finished difference Result 493 states and 570 transitions. [2022-12-14 03:16:03,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-14 03:16:03,525 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 33 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-12-14 03:16:03,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:16:03,527 INFO L225 Difference]: With dead ends: 493 [2022-12-14 03:16:03,527 INFO L226 Difference]: Without dead ends: 483 [2022-12-14 03:16:03,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1991 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=910, Invalid=6568, Unknown=4, NotChecked=0, Total=7482 [2022-12-14 03:16:03,529 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 3184 mSDsluCounter, 1275 mSDsCounter, 0 mSdLazyCounter, 1991 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3184 SdHoareTripleChecker+Valid, 1369 SdHoareTripleChecker+Invalid, 2010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 03:16:03,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3184 Valid, 1369 Invalid, 2010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1991 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 03:16:03,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-12-14 03:16:03,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 114. [2022-12-14 03:16:03,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 102 states have (on average 1.3235294117647058) internal successors, (135), 113 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:03,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 135 transitions. [2022-12-14 03:16:03,534 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 135 transitions. Word has length 24 [2022-12-14 03:16:03,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:16:03,535 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 135 transitions. [2022-12-14 03:16:03,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 33 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:03,535 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 135 transitions. [2022-12-14 03:16:03,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 03:16:03,535 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:16:03,535 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:16:03,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 03:16:03,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 03:16:03,737 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:16:03,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:16:03,738 INFO L85 PathProgramCache]: Analyzing trace with hash 986774729, now seen corresponding path program 2 times [2022-12-14 03:16:03,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:16:03,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294651657] [2022-12-14 03:16:03,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:03,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:16:03,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:16:03,928 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:16:03,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:16:03,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294651657] [2022-12-14 03:16:03,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294651657] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:16:03,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217751379] [2022-12-14 03:16:03,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 03:16:03,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:16:03,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:16:03,930 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:16:03,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 03:16:04,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 03:16:04,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:16:04,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 71 conjunts are in the unsatisfiable core [2022-12-14 03:16:04,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:16:04,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:16:04,095 INFO L321 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2022-12-14 03:16:04,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-12-14 03:16:04,340 INFO L321 Elim1Store]: treesize reduction 40, result has 34.4 percent of original size [2022-12-14 03:16:04,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 34 [2022-12-14 03:16:04,417 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 03:16:04,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:16:04,676 INFO L321 Elim1Store]: treesize reduction 17, result has 54.1 percent of original size [2022-12-14 03:16:04,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 70 [2022-12-14 03:16:04,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 03:16:04,688 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:16:04,688 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 34 [2022-12-14 03:16:04,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-14 03:16:04,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:16:04,711 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:16:04,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 37 treesize of output 48 [2022-12-14 03:16:04,879 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 03:16:04,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217751379] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:16:04,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [701897002] [2022-12-14 03:16:04,880 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 03:16:04,880 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:16:04,880 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:16:04,881 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:16:04,881 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:16:04,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:04,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:16:04,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:16:04,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:16:04,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:16:04,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2022-12-14 03:16:05,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:16:05,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:16:05,073 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:16:05,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:16:05,491 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:16:09,178 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5618#(and (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#res#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_cstrstr_~s#1.offset|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= |ULTIMATE.start_cstrlen_~s~0#1.offset| 1) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= |ULTIMATE.start_cstrstr_~len~0#1| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrstr_#t~post17#1.base|) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrstr_~len~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrlen_#res#1| 0) (<= 0 |ULTIMATE.start_cstrstr_#t~post17#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (= |#NULL.offset| 0) (< (select |#length| |ULTIMATE.start_cstrstr_#t~post17#1.base|) (+ |ULTIMATE.start_cstrstr_#t~post17#1.offset| 1)) (= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 03:16:09,178 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:16:09,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:16:09,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 25 [2022-12-14 03:16:09,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850100962] [2022-12-14 03:16:09,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:16:09,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 03:16:09,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:16:09,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 03:16:09,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1584, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 03:16:09,180 INFO L87 Difference]: Start difference. First operand 114 states and 135 transitions. Second operand has 27 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:09,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:16:09,961 INFO L93 Difference]: Finished difference Result 145 states and 170 transitions. [2022-12-14 03:16:09,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 03:16:09,961 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 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 25 [2022-12-14 03:16:09,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:16:09,963 INFO L225 Difference]: With dead ends: 145 [2022-12-14 03:16:09,963 INFO L226 Difference]: Without dead ends: 145 [2022-12-14 03:16:09,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=562, Invalid=2860, Unknown=0, NotChecked=0, Total=3422 [2022-12-14 03:16:09,963 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 313 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 03:16:09,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 204 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 03:16:09,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-12-14 03:16:09,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 132. [2022-12-14 03:16:09,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 120 states have (on average 1.4) internal successors, (168), 131 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:09,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 168 transitions. [2022-12-14 03:16:09,966 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 168 transitions. Word has length 25 [2022-12-14 03:16:09,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:16:09,966 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 168 transitions. [2022-12-14 03:16:09,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:09,967 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 168 transitions. [2022-12-14 03:16:09,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 03:16:09,967 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:16:09,967 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:16:09,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 03:16:10,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 03:16:10,168 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:16:10,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:16:10,169 INFO L85 PathProgramCache]: Analyzing trace with hash 525204974, now seen corresponding path program 1 times [2022-12-14 03:16:10,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:16:10,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34557499] [2022-12-14 03:16:10,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:10,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:16:10,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:16:10,270 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 03:16:10,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:16:10,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34557499] [2022-12-14 03:16:10,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34557499] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:16:10,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:16:10,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 03:16:10,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485789335] [2022-12-14 03:16:10,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:16:10,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 03:16:10,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:16:10,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 03:16:10,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:16:10,272 INFO L87 Difference]: Start difference. First operand 132 states and 168 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:10,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:16:10,312 INFO L93 Difference]: Finished difference Result 138 states and 173 transitions. [2022-12-14 03:16:10,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 03:16:10,312 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-12-14 03:16:10,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:16:10,313 INFO L225 Difference]: With dead ends: 138 [2022-12-14 03:16:10,313 INFO L226 Difference]: Without dead ends: 138 [2022-12-14 03:16:10,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 03:16:10,313 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 98 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:16:10,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 39 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:16:10,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-12-14 03:16:10,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 130. [2022-12-14 03:16:10,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 120 states have (on average 1.3666666666666667) internal successors, (164), 129 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:10,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 164 transitions. [2022-12-14 03:16:10,316 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 164 transitions. Word has length 26 [2022-12-14 03:16:10,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:16:10,316 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 164 transitions. [2022-12-14 03:16:10,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:10,316 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 164 transitions. [2022-12-14 03:16:10,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 03:16:10,317 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:16:10,317 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:16:10,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-14 03:16:10,317 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:16:10,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:16:10,317 INFO L85 PathProgramCache]: Analyzing trace with hash 525204975, now seen corresponding path program 1 times [2022-12-14 03:16:10,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:16:10,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089449216] [2022-12-14 03:16:10,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:10,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:16:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:16:10,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:16:10,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:16:10,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089449216] [2022-12-14 03:16:10,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089449216] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:16:10,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283044603] [2022-12-14 03:16:10,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:10,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:16:10,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:16:10,482 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:16:10,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 03:16:10,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:16:10,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 03:16:10,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:16:10,617 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:16:10,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:16:10,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 03:16:10,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:16:10,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283044603] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:16:10,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [591146446] [2022-12-14 03:16:10,743 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-12-14 03:16:10,743 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:16:10,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:16:10,744 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:16:10,744 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:16:10,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:10,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:16:10,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:16:10,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:16:10,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:16:10,873 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 03:16:10,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 76 [2022-12-14 03:16:10,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:16:10,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:16:10,970 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:16:10,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:16:11,163 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:16:15,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [591146446] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:16:15,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:16:15,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [7, 7, 7] total 32 [2022-12-14 03:16:15,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432689241] [2022-12-14 03:16:15,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:16:15,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 03:16:15,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:16:15,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 03:16:15,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 03:16:15,687 INFO L87 Difference]: Start difference. First operand 130 states and 164 transitions. Second operand has 19 states, 19 states have (on average 1.1578947368421053) 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) [2022-12-14 03:16:16,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:16:16,319 INFO L93 Difference]: Finished difference Result 147 states and 183 transitions. [2022-12-14 03:16:16,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 03:16:16,319 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.1578947368421053) 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) Word has length 26 [2022-12-14 03:16:16,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:16:16,320 INFO L225 Difference]: With dead ends: 147 [2022-12-14 03:16:16,320 INFO L226 Difference]: Without dead ends: 147 [2022-12-14 03:16:16,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 03:16:16,321 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 03:16:16,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 130 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 03:16:16,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-12-14 03:16:16,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2022-12-14 03:16:16,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 132 states have (on average 1.3484848484848484) internal successors, (178), 141 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:16,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 178 transitions. [2022-12-14 03:16:16,323 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 178 transitions. Word has length 26 [2022-12-14 03:16:16,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:16:16,323 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 178 transitions. [2022-12-14 03:16:16,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.1578947368421053) 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) [2022-12-14 03:16:16,323 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 178 transitions. [2022-12-14 03:16:16,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 03:16:16,323 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:16:16,324 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:16:16,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 03:16:16,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:16:16,525 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:16:16,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:16:16,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1114423121, now seen corresponding path program 3 times [2022-12-14 03:16:16,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:16:16,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722172971] [2022-12-14 03:16:16,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:16,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:16:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:16:16,905 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:16:16,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:16:16,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722172971] [2022-12-14 03:16:16,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722172971] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:16:16,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183995110] [2022-12-14 03:16:16,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 03:16:16,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:16:16,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:16:16,907 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:16:16,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 03:16:17,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 03:16:17,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:16:17,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 74 conjunts are in the unsatisfiable core [2022-12-14 03:16:17,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:16:17,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:16:17,191 INFO L321 Elim1Store]: treesize reduction 22, result has 47.6 percent of original size [2022-12-14 03:16:17,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 33 [2022-12-14 03:16:17,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 03:16:17,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:16:17,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:16:17,645 INFO L321 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2022-12-14 03:16:17,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 173 treesize of output 176 [2022-12-14 03:16:17,659 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:16:17,659 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 43 treesize of output 45 [2022-12-14 03:16:17,671 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 18 [2022-12-14 03:16:17,770 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:16:17,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 59 [2022-12-14 03:16:17,965 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:16:17,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183995110] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:16:17,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [321701329] [2022-12-14 03:16:17,966 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 03:16:17,966 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:16:17,967 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:16:17,967 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:16:17,967 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:16:17,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:17,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:16:18,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:16:18,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:16:18,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:16:18,083 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 03:16:18,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 76 [2022-12-14 03:16:18,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:16:18,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:16:18,208 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:16:18,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:16:18,838 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:16:22,951 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6893#(and (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#res#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_cstrstr_~s#1.offset|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= |ULTIMATE.start_cstrlen_~s~0#1.offset| 1) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= |ULTIMATE.start_cstrstr_~len~0#1| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrstr_#t~post17#1.base|) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrstr_~len~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrlen_#res#1| 0) (<= 0 |ULTIMATE.start_cstrstr_#t~post17#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (= |#NULL.offset| 0) (< (select |#length| |ULTIMATE.start_cstrstr_#t~post17#1.base|) (+ |ULTIMATE.start_cstrstr_#t~post17#1.offset| 1)) (= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 03:16:22,951 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:16:22,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:16:22,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 33 [2022-12-14 03:16:22,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774318938] [2022-12-14 03:16:22,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:16:22,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 03:16:22,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:16:22,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 03:16:22,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2359, Unknown=0, NotChecked=0, Total=2550 [2022-12-14 03:16:22,953 INFO L87 Difference]: Start difference. First operand 142 states and 178 transitions. Second operand has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:23,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:16:23,851 INFO L93 Difference]: Finished difference Result 236 states and 290 transitions. [2022-12-14 03:16:23,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 03:16:23,851 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-12-14 03:16:23,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:16:23,852 INFO L225 Difference]: With dead ends: 236 [2022-12-14 03:16:23,852 INFO L226 Difference]: Without dead ends: 215 [2022-12-14 03:16:23,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=403, Invalid=3629, Unknown=0, NotChecked=0, Total=4032 [2022-12-14 03:16:23,852 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 382 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 03:16:23,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 688 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 03:16:23,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-12-14 03:16:23,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 204. [2022-12-14 03:16:23,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 194 states have (on average 1.3350515463917525) internal successors, (259), 203 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:23,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 259 transitions. [2022-12-14 03:16:23,855 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 259 transitions. Word has length 29 [2022-12-14 03:16:23,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:16:23,855 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 259 transitions. [2022-12-14 03:16:23,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:23,856 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 259 transitions. [2022-12-14 03:16:23,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 03:16:23,856 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:16:23,856 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:16:23,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 03:16:24,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 03:16:24,057 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:16:24,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:16:24,058 INFO L85 PathProgramCache]: Analyzing trace with hash 571718319, now seen corresponding path program 1 times [2022-12-14 03:16:24,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:16:24,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956697497] [2022-12-14 03:16:24,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:24,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:16:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:16:24,195 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 03:16:24,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:16:24,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956697497] [2022-12-14 03:16:24,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956697497] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:16:24,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968956000] [2022-12-14 03:16:24,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:24,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:16:24,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:16:24,196 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:16:24,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 03:16:24,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:16:24,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 03:16:24,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:16:24,324 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 03:16:24,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:16:24,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 03:16:24,456 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 03:16:24,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968956000] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:16:24,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1007841001] [2022-12-14 03:16:24,458 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-12-14 03:16:24,458 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:16:24,458 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:16:24,458 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:16:24,458 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:16:24,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:24,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:16:24,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:16:24,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:16:24,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:16:24,583 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 03:16:24,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 76 [2022-12-14 03:16:24,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:16:24,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:16:24,690 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:16:24,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:16:24,922 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:16:28,615 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7566#(and (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (= |ULTIMATE.start_cstrstr_~s#1.offset| |ULTIMATE.start_cstrncmp_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_cstrstr_~sc~0#1| |ULTIMATE.start_cstrstr_~c~0#1|) (<= |ULTIMATE.start_cstrstr_~s#1.offset| (select |#length| |ULTIMATE.start_cstrstr_~s#1.base|)) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (= |ULTIMATE.start_cstrlen_~s~0#1.offset| (+ |ULTIMATE.start_cstrlen_#res#1| |ULTIMATE.start_cstrlen_~str#1.offset|)) (= |ULTIMATE.start_cstrncmp_#in~s1#1.base| |ULTIMATE.start_cstrstr_~s#1.base|) (= |ULTIMATE.start_cstrstr_~find#1.base| |ULTIMATE.start_cstrncmp_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (= |ULTIMATE.start_cstrstr_~find#1.offset| |ULTIMATE.start_cstrncmp_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrstr_~s#1.offset|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (= |ULTIMATE.start_cstrncmp_~s1#1.offset| |ULTIMATE.start_cstrncmp_#in~s1#1.offset|) (= |ULTIMATE.start_cstrncmp_~s2#1.offset| |ULTIMATE.start_cstrncmp_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (= (select |#valid| |ULTIMATE.start_cstrstr_~s#1.base|) 1) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (= |ULTIMATE.start_cstrncmp_#in~n#1| |ULTIMATE.start_cstrncmp_~n#1|) (= |ULTIMATE.start_cstrncmp_~s2#1.base| |ULTIMATE.start_cstrncmp_#in~s2#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (not (= |ULTIMATE.start_cstrstr_~sc~0#1| 0)) (= |ULTIMATE.start_cstrstr_~sc~0#1| (select (select |#memory_int| |ULTIMATE.start_cstrstr_~s#1.base|) (+ (- 1) |ULTIMATE.start_cstrstr_~s#1.offset|))) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.offset|) (not (<= (+ |ULTIMATE.start_cstrncmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrncmp_~s1#1.base|))) (= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= |ULTIMATE.start_cstrstr_~s#1.offset| 1) (<= 0 |#NULL.offset|) (= |ULTIMATE.start_cstrncmp_#in~s1#1.base| |ULTIMATE.start_cstrncmp_~s1#1.base|) (= |ULTIMATE.start_cstrncmp_#in~n#1| |ULTIMATE.start_cstrstr_~len~0#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |ULTIMATE.start_cstrlen_#res#1| |ULTIMATE.start_cstrstr_~len~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 03:16:28,615 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:16:28,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:16:28,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-12-14 03:16:28,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417720934] [2022-12-14 03:16:28,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:16:28,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 03:16:28,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:16:28,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 03:16:28,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 03:16:28,618 INFO L87 Difference]: Start difference. First operand 204 states and 259 transitions. Second operand has 16 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:28,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:16:28,931 INFO L93 Difference]: Finished difference Result 250 states and 302 transitions. [2022-12-14 03:16:28,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 03:16:28,931 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-12-14 03:16:28,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:16:28,932 INFO L225 Difference]: With dead ends: 250 [2022-12-14 03:16:28,932 INFO L226 Difference]: Without dead ends: 250 [2022-12-14 03:16:28,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=253, Invalid=1469, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 03:16:28,933 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 350 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 03:16:28,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 224 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 03:16:28,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-12-14 03:16:28,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 205. [2022-12-14 03:16:28,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 196 states have (on average 1.316326530612245) internal successors, (258), 204 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:28,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 258 transitions. [2022-12-14 03:16:28,936 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 258 transitions. Word has length 30 [2022-12-14 03:16:28,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:16:28,936 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 258 transitions. [2022-12-14 03:16:28,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:28,936 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 258 transitions. [2022-12-14 03:16:28,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 03:16:28,936 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:16:28,936 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:16:28,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 03:16:29,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 03:16:29,137 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:16:29,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:16:29,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1058000789, now seen corresponding path program 4 times [2022-12-14 03:16:29,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:16:29,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899217185] [2022-12-14 03:16:29,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:29,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:16:29,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:16:29,335 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:16:29,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:16:29,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899217185] [2022-12-14 03:16:29,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899217185] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:16:29,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693038010] [2022-12-14 03:16:29,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 03:16:29,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:16:29,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:16:29,336 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:16:29,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 03:16:29,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:16:29,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 03:16:29,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:16:29,477 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:16:29,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:16:29,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 03:16:29,634 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:16:29,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693038010] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:16:29,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [133089182] [2022-12-14 03:16:29,636 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 03:16:29,636 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:16:29,636 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:16:29,636 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:16:29,636 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:16:29,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:29,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:16:29,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:16:29,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:16:29,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:16:29,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2022-12-14 03:16:29,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:16:29,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:16:29,843 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:16:29,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:16:30,141 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:16:33,925 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8255#(and (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#res#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_cstrstr_~s#1.offset|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= |ULTIMATE.start_cstrlen_~s~0#1.offset| 1) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= |ULTIMATE.start_cstrstr_~len~0#1| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrstr_#t~post17#1.base|) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrstr_~len~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrlen_#res#1| 0) (<= 0 |ULTIMATE.start_cstrstr_#t~post17#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.offset|) (< (select |#length| |ULTIMATE.start_cstrstr_#t~post17#1.base|) (+ |ULTIMATE.start_cstrstr_#t~post17#1.offset| 1)) (= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 03:16:33,925 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:16:33,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:16:33,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-12-14 03:16:33,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337963250] [2022-12-14 03:16:33,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:16:33,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 03:16:33,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:16:33,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 03:16:33,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1081, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 03:16:33,927 INFO L87 Difference]: Start difference. First operand 205 states and 258 transitions. Second operand has 19 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 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) [2022-12-14 03:16:34,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:16:34,287 INFO L93 Difference]: Finished difference Result 248 states and 290 transitions. [2022-12-14 03:16:34,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 03:16:34,287 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 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 31 [2022-12-14 03:16:34,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:16:34,288 INFO L225 Difference]: With dead ends: 248 [2022-12-14 03:16:34,288 INFO L226 Difference]: Without dead ends: 248 [2022-12-14 03:16:34,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=290, Invalid=1780, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 03:16:34,289 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 513 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 03:16:34,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 412 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 03:16:34,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-12-14 03:16:34,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 223. [2022-12-14 03:16:34,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 214 states have (on average 1.3457943925233644) internal successors, (288), 222 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:34,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 288 transitions. [2022-12-14 03:16:34,293 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 288 transitions. Word has length 31 [2022-12-14 03:16:34,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:16:34,293 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 288 transitions. [2022-12-14 03:16:34,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 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) [2022-12-14 03:16:34,293 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 288 transitions. [2022-12-14 03:16:34,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 03:16:34,294 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:16:34,294 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:16:34,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 03:16:34,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-14 03:16:34,495 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:16:34,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:16:34,497 INFO L85 PathProgramCache]: Analyzing trace with hash 543400781, now seen corresponding path program 1 times [2022-12-14 03:16:34,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:16:34,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497398714] [2022-12-14 03:16:34,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:34,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:16:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:16:34,585 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 03:16:34,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:16:34,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497398714] [2022-12-14 03:16:34,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497398714] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:16:34,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:16:34,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 03:16:34,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749743967] [2022-12-14 03:16:34,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:16:34,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 03:16:34,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:16:34,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 03:16:34,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:16:34,586 INFO L87 Difference]: Start difference. First operand 223 states and 288 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:34,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:16:34,627 INFO L93 Difference]: Finished difference Result 235 states and 299 transitions. [2022-12-14 03:16:34,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 03:16:34,627 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-12-14 03:16:34,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:16:34,628 INFO L225 Difference]: With dead ends: 235 [2022-12-14 03:16:34,628 INFO L226 Difference]: Without dead ends: 235 [2022-12-14 03:16:34,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-12-14 03:16:34,628 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 95 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:16:34,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 68 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:16:34,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-12-14 03:16:34,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 222. [2022-12-14 03:16:34,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 214 states have (on average 1.3271028037383177) internal successors, (284), 221 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:34,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 284 transitions. [2022-12-14 03:16:34,631 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 284 transitions. Word has length 31 [2022-12-14 03:16:34,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:16:34,631 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 284 transitions. [2022-12-14 03:16:34,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:34,631 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 284 transitions. [2022-12-14 03:16:34,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 03:16:34,632 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:16:34,632 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:16:34,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-14 03:16:34,632 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:16:34,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:16:34,632 INFO L85 PathProgramCache]: Analyzing trace with hash 543400782, now seen corresponding path program 1 times [2022-12-14 03:16:34,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:16:34,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313651763] [2022-12-14 03:16:34,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:34,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:16:34,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:16:34,803 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 03:16:34,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:16:34,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313651763] [2022-12-14 03:16:34,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313651763] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:16:34,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314030530] [2022-12-14 03:16:34,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:34,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:16:34,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:16:34,804 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:16:34,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 03:16:34,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:16:34,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 03:16:34,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:16:34,964 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 03:16:34,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:16:35,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 03:16:35,096 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 03:16:35,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314030530] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:16:35,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1028253138] [2022-12-14 03:16:35,098 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-12-14 03:16:35,098 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:16:35,098 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:16:35,098 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:16:35,099 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:16:35,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:35,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:16:35,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:16:35,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:16:35,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:16:35,238 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 03:16:35,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 76 [2022-12-14 03:16:35,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:16:35,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:16:35,354 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:16:35,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:16:35,590 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:16:40,178 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9431#(and (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (= |ULTIMATE.start_cstrstr_~s#1.offset| |ULTIMATE.start_cstrncmp_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (= |ULTIMATE.start_cstrncmp_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_cstrncmp_~s1#1.base|) |ULTIMATE.start_cstrncmp_~s1#1.offset|)) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_cstrstr_~sc~0#1| |ULTIMATE.start_cstrstr_~c~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (= |ULTIMATE.start_cstrlen_~s~0#1.offset| (+ |ULTIMATE.start_cstrlen_#res#1| |ULTIMATE.start_cstrlen_~str#1.offset|)) (= |ULTIMATE.start_cstrncmp_#in~s1#1.base| |ULTIMATE.start_cstrstr_~s#1.base|) (= |ULTIMATE.start_cstrstr_~find#1.base| |ULTIMATE.start_cstrncmp_#in~s2#1.base|) (not (<= (+ |ULTIMATE.start_cstrncmp_#t~post5#1.offset| 1) (select |#length| |ULTIMATE.start_cstrncmp_#t~post5#1.base|))) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (= |ULTIMATE.start_cstrncmp_~s2#1.base| |ULTIMATE.start_cstrncmp_#t~post5#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (= |ULTIMATE.start_cstrstr_~find#1.offset| |ULTIMATE.start_cstrncmp_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrstr_~s#1.offset|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= (+ |ULTIMATE.start_cstrncmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrncmp_~s1#1.base|)) (= |ULTIMATE.start_cstrncmp_#in~s2#1.base| |ULTIMATE.start_cstrncmp_#t~post5#1.base|) (= |ULTIMATE.start_cstrncmp_~s1#1.offset| |ULTIMATE.start_cstrncmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (= (select |#valid| |ULTIMATE.start_cstrstr_~s#1.base|) 1) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (= |ULTIMATE.start_cstrncmp_#in~n#1| |ULTIMATE.start_cstrncmp_~n#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (not (= |ULTIMATE.start_cstrstr_~sc~0#1| 0)) (= |ULTIMATE.start_cstrstr_~sc~0#1| (select (select |#memory_int| |ULTIMATE.start_cstrstr_~s#1.base|) (+ (- 1) |ULTIMATE.start_cstrstr_~s#1.offset|))) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.offset|) (= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (= |ULTIMATE.start_cstrncmp_#t~post5#1.offset| |ULTIMATE.start_cstrncmp_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrstr_~s#1.offset| 1) (<= 0 |#NULL.offset|) (= |ULTIMATE.start_cstrncmp_#in~s1#1.base| |ULTIMATE.start_cstrncmp_~s1#1.base|) (= |ULTIMATE.start_cstrncmp_#in~n#1| |ULTIMATE.start_cstrstr_~len~0#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= (+ |ULTIMATE.start_cstrncmp_#t~post5#1.offset| 1) |ULTIMATE.start_cstrncmp_~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |ULTIMATE.start_cstrlen_#res#1| |ULTIMATE.start_cstrstr_~len~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 03:16:40,178 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:16:40,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:16:40,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-12-14 03:16:40,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458395374] [2022-12-14 03:16:40,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:16:40,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 03:16:40,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:16:40,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 03:16:40,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 03:16:40,179 INFO L87 Difference]: Start difference. First operand 222 states and 284 transitions. Second operand has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:40,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:16:40,540 INFO L93 Difference]: Finished difference Result 387 states and 493 transitions. [2022-12-14 03:16:40,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 03:16:40,541 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 31 [2022-12-14 03:16:40,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:16:40,541 INFO L225 Difference]: With dead ends: 387 [2022-12-14 03:16:40,541 INFO L226 Difference]: Without dead ends: 387 [2022-12-14 03:16:40,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=381, Invalid=2069, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 03:16:40,542 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 348 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 03:16:40,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 370 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 03:16:40,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-12-14 03:16:40,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 305. [2022-12-14 03:16:40,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 297 states have (on average 1.404040404040404) internal successors, (417), 304 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:40,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 417 transitions. [2022-12-14 03:16:40,547 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 417 transitions. Word has length 31 [2022-12-14 03:16:40,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:16:40,547 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 417 transitions. [2022-12-14 03:16:40,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:40,547 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 417 transitions. [2022-12-14 03:16:40,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 03:16:40,547 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:16:40,547 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:16:40,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 03:16:40,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:16:40,748 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:16:40,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:16:40,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1561754461, now seen corresponding path program 1 times [2022-12-14 03:16:40,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:16:40,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66023754] [2022-12-14 03:16:40,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:40,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:16:40,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:16:40,933 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:16:40,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:16:40,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66023754] [2022-12-14 03:16:40,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66023754] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:16:40,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461077453] [2022-12-14 03:16:40,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:40,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:16:40,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:16:40,935 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:16:40,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 03:16:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:16:41,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-14 03:16:41,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:16:41,095 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:16:41,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:16:41,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 03:16:41,271 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:16:41,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461077453] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:16:41,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1642161080] [2022-12-14 03:16:41,273 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-12-14 03:16:41,273 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:16:41,273 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:16:41,273 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:16:41,273 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:16:41,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:41,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:16:41,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:16:41,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:16:41,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:16:41,402 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 03:16:41,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 76 [2022-12-14 03:16:41,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:16:41,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:16:41,517 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:16:41,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:16:41,795 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:16:44,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1642161080] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:16:44,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:16:44,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [9, 9, 9] total 36 [2022-12-14 03:16:44,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391131478] [2022-12-14 03:16:44,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:16:44,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 03:16:44,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:16:44,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 03:16:44,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 03:16:44,742 INFO L87 Difference]: Start difference. First operand 305 states and 417 transitions. Second operand has 20 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:46,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:16:46,570 INFO L93 Difference]: Finished difference Result 320 states and 413 transitions. [2022-12-14 03:16:46,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 03:16:46,571 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-12-14 03:16:46,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:16:46,572 INFO L225 Difference]: With dead ends: 320 [2022-12-14 03:16:46,572 INFO L226 Difference]: Without dead ends: 320 [2022-12-14 03:16:46,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=264, Invalid=1542, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 03:16:46,572 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 65 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 03:16:46,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 102 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 03:16:46,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-12-14 03:16:46,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 275. [2022-12-14 03:16:46,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 267 states have (on average 1.3632958801498127) internal successors, (364), 274 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:46,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 364 transitions. [2022-12-14 03:16:46,576 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 364 transitions. Word has length 32 [2022-12-14 03:16:46,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:16:46,576 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 364 transitions. [2022-12-14 03:16:46,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:46,576 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 364 transitions. [2022-12-14 03:16:46,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 03:16:46,577 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:16:46,577 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:16:46,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 03:16:46,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:16:46,778 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:16:46,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:16:46,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1765966764, now seen corresponding path program 6 times [2022-12-14 03:16:46,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:16:46,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230094265] [2022-12-14 03:16:46,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:46,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:16:46,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:16:47,473 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:16:47,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:16:47,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230094265] [2022-12-14 03:16:47,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230094265] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:16:47,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516890514] [2022-12-14 03:16:47,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 03:16:47,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:16:47,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:16:47,475 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:16:47,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 03:16:47,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 03:16:47,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:16:47,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-14 03:16:47,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:16:47,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:16:51,588 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-12-14 03:16:51,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 26 [2022-12-14 03:16:51,625 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 21 proven. 32 refuted. 4 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 03:16:51,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:16:55,874 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 46 treesize of output 40 [2022-12-14 03:16:55,877 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:16:55,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 34 [2022-12-14 03:16:56,070 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 26 proven. 31 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 03:16:56,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516890514] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:16:56,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [682757099] [2022-12-14 03:16:56,072 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 03:16:56,072 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:16:56,072 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:16:56,072 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:16:56,072 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:16:56,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:56,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:16:56,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:16:56,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:16:56,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:16:56,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:16:56,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:16:56,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:16:56,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:16:56,335 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:16:56,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:16:56,497 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:16:58,509 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11231#(and (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= |ULTIMATE.start_cstrstr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~s#1.offset|) (not (<= (+ |ULTIMATE.start_cstrlen_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlen_~s~0#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 03:16:58,509 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:16:58,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:16:58,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 48 [2022-12-14 03:16:58,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252472694] [2022-12-14 03:16:58,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:16:58,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-14 03:16:58,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:16:58,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-14 03:16:58,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=3096, Unknown=12, NotChecked=0, Total=3306 [2022-12-14 03:16:58,511 INFO L87 Difference]: Start difference. First operand 275 states and 364 transitions. Second operand has 48 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 48 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:17:23,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:17:23,143 INFO L93 Difference]: Finished difference Result 1130 states and 1580 transitions. [2022-12-14 03:17:23,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-14 03:17:23,144 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 48 states have internal predecessors, (79), 0 states have call successors, (0), 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 32 [2022-12-14 03:17:23,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:17:23,150 INFO L225 Difference]: With dead ends: 1130 [2022-12-14 03:17:23,150 INFO L226 Difference]: Without dead ends: 1118 [2022-12-14 03:17:23,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1852 ImplicationChecksByTransitivity, 32.1s TimeCoverageRelationStatistics Valid=1017, Invalid=8089, Unknown=14, NotChecked=0, Total=9120 [2022-12-14 03:17:23,151 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 3616 mSDsluCounter, 1635 mSDsCounter, 0 mSdLazyCounter, 2048 mSolverCounterSat, 24 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3616 SdHoareTripleChecker+Valid, 1705 SdHoareTripleChecker+Invalid, 2075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2048 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:17:23,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3616 Valid, 1705 Invalid, 2075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2048 Invalid, 3 Unknown, 0 Unchecked, 3.1s Time] [2022-12-14 03:17:23,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2022-12-14 03:17:23,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 297. [2022-12-14 03:17:23,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 289 states have (on average 1.3529411764705883) internal successors, (391), 296 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:17:23,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 391 transitions. [2022-12-14 03:17:23,164 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 391 transitions. Word has length 32 [2022-12-14 03:17:23,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:17:23,165 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 391 transitions. [2022-12-14 03:17:23,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 48 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:17:23,165 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 391 transitions. [2022-12-14 03:17:23,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 03:17:23,165 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:17:23,166 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:17:23,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 03:17:23,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:17:23,367 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:17:23,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:17:23,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1777856146, now seen corresponding path program 1 times [2022-12-14 03:17:23,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:17:23,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721748285] [2022-12-14 03:17:23,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:17:23,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:17:23,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:17:23,460 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 03:17:23,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:17:23,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721748285] [2022-12-14 03:17:23,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721748285] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:17:23,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:17:23,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 03:17:23,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317976323] [2022-12-14 03:17:23,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:17:23,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 03:17:23,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:17:23,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 03:17:23,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:17:23,461 INFO L87 Difference]: Start difference. First operand 297 states and 391 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:17:23,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:17:23,510 INFO L93 Difference]: Finished difference Result 321 states and 413 transitions. [2022-12-14 03:17:23,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 03:17:23,511 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-12-14 03:17:23,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:17:23,511 INFO L225 Difference]: With dead ends: 321 [2022-12-14 03:17:23,511 INFO L226 Difference]: Without dead ends: 321 [2022-12-14 03:17:23,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-12-14 03:17:23,512 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 88 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:17:23,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 63 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:17:23,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-12-14 03:17:23,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 296. [2022-12-14 03:17:23,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 289 states have (on average 1.3252595155709344) internal successors, (383), 295 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:17:23,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 383 transitions. [2022-12-14 03:17:23,515 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 383 transitions. Word has length 33 [2022-12-14 03:17:23,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:17:23,515 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 383 transitions. [2022-12-14 03:17:23,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:17:23,515 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 383 transitions. [2022-12-14 03:17:23,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 03:17:23,516 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:17:23,516 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:17:23,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-12-14 03:17:23,516 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:17:23,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:17:23,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1777856145, now seen corresponding path program 1 times [2022-12-14 03:17:23,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:17:23,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418238682] [2022-12-14 03:17:23,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:17:23,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:17:23,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:17:23,612 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 03:17:23,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:17:23,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418238682] [2022-12-14 03:17:23,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418238682] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:17:23,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:17:23,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 03:17:23,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484149337] [2022-12-14 03:17:23,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:17:23,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 03:17:23,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:17:23,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 03:17:23,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 03:17:23,613 INFO L87 Difference]: Start difference. First operand 296 states and 383 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:17:23,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:17:23,719 INFO L93 Difference]: Finished difference Result 342 states and 429 transitions. [2022-12-14 03:17:23,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 03:17:23,719 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-12-14 03:17:23,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:17:23,720 INFO L225 Difference]: With dead ends: 342 [2022-12-14 03:17:23,720 INFO L226 Difference]: Without dead ends: 342 [2022-12-14 03:17:23,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-12-14 03:17:23,720 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 59 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:17:23,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 129 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:17:23,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-12-14 03:17:23,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 295. [2022-12-14 03:17:23,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 289 states have (on average 1.2975778546712802) internal successors, (375), 294 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:17:23,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 375 transitions. [2022-12-14 03:17:23,724 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 375 transitions. Word has length 33 [2022-12-14 03:17:23,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:17:23,724 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 375 transitions. [2022-12-14 03:17:23,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:17:23,724 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 375 transitions. [2022-12-14 03:17:23,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 03:17:23,724 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:17:23,724 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:17:23,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-12-14 03:17:23,725 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:17:23,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:17:23,725 INFO L85 PathProgramCache]: Analyzing trace with hash 721026240, now seen corresponding path program 1 times [2022-12-14 03:17:23,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:17:23,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347675370] [2022-12-14 03:17:23,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:17:23,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:17:23,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:17:23,762 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 03:17:23,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:17:23,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347675370] [2022-12-14 03:17:23,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347675370] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:17:23,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:17:23,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 03:17:23,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153764124] [2022-12-14 03:17:23,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:17:23,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 03:17:23,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:17:23,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 03:17:23,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:17:23,763 INFO L87 Difference]: Start difference. First operand 295 states and 375 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:17:23,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:17:23,807 INFO L93 Difference]: Finished difference Result 317 states and 395 transitions. [2022-12-14 03:17:23,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 03:17:23,807 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-12-14 03:17:23,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:17:23,808 INFO L225 Difference]: With dead ends: 317 [2022-12-14 03:17:23,808 INFO L226 Difference]: Without dead ends: 317 [2022-12-14 03:17:23,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 03:17:23,808 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 23 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:17:23,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 113 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:17:23,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-12-14 03:17:23,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 294. [2022-12-14 03:17:23,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 289 states have (on average 1.2837370242214532) internal successors, (371), 293 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:17:23,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 371 transitions. [2022-12-14 03:17:23,812 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 371 transitions. Word has length 34 [2022-12-14 03:17:23,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:17:23,812 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 371 transitions. [2022-12-14 03:17:23,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:17:23,812 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 371 transitions. [2022-12-14 03:17:23,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 03:17:23,812 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:17:23,812 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:17:23,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-12-14 03:17:23,812 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:17:23,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:17:23,813 INFO L85 PathProgramCache]: Analyzing trace with hash 721026241, now seen corresponding path program 1 times [2022-12-14 03:17:23,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:17:23,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452125326] [2022-12-14 03:17:23,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:17:23,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:17:23,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:17:24,005 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 03:17:24,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:17:24,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452125326] [2022-12-14 03:17:24,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452125326] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:17:24,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967098345] [2022-12-14 03:17:24,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:17:24,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:17:24,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:17:24,007 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:17:24,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 03:17:24,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:17:24,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-14 03:17:24,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:17:24,163 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 03:17:24,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:17:24,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 03:17:24,329 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 03:17:24,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967098345] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:17:24,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [911720508] [2022-12-14 03:17:24,330 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-12-14 03:17:24,330 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:17:24,330 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:17:24,331 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:17:24,331 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:17:24,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:17:24,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:17:24,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:17:24,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:17:24,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:17:24,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2022-12-14 03:17:24,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:17:24,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:17:24,556 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:17:24,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:17:24,857 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:17:29,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [911720508] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:17:29,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:17:29,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [11, 10, 10] total 40 [2022-12-14 03:17:29,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792442857] [2022-12-14 03:17:29,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:17:29,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 03:17:29,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:17:29,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 03:17:29,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1414, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 03:17:29,863 INFO L87 Difference]: Start difference. First operand 294 states and 371 transitions. Second operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:17:34,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:17:34,029 INFO L93 Difference]: Finished difference Result 311 states and 384 transitions. [2022-12-14 03:17:34,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 03:17:34,029 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-12-14 03:17:34,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:17:34,030 INFO L225 Difference]: With dead ends: 311 [2022-12-14 03:17:34,030 INFO L226 Difference]: Without dead ends: 309 [2022-12-14 03:17:34,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=395, Invalid=2361, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 03:17:34,030 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 151 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 03:17:34,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 149 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 03:17:34,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-12-14 03:17:34,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 296. [2022-12-14 03:17:34,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 291 states have (on average 1.2783505154639174) internal successors, (372), 295 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:17:34,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 372 transitions. [2022-12-14 03:17:34,033 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 372 transitions. Word has length 34 [2022-12-14 03:17:34,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:17:34,034 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 372 transitions. [2022-12-14 03:17:34,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:17:34,034 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 372 transitions. [2022-12-14 03:17:34,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 03:17:34,034 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:17:34,034 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:17:34,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 03:17:34,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:17:34,235 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:17:34,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:17:34,235 INFO L85 PathProgramCache]: Analyzing trace with hash -649535158, now seen corresponding path program 7 times [2022-12-14 03:17:34,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:17:34,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039564689] [2022-12-14 03:17:34,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:17:34,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:17:34,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:17:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:17:34,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:17:34,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039564689] [2022-12-14 03:17:34,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039564689] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:17:34,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530876922] [2022-12-14 03:17:34,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 03:17:34,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:17:34,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:17:34,906 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:17:34,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 03:17:35,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:17:35,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-14 03:17:35,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:17:35,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:17:35,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:17:35,690 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:17:35,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-12-14 03:17:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 15 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 03:17:35,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:17:35,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-14 03:17:35,940 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 24 treesize of output 20 [2022-12-14 03:17:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 15 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 03:17:36,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530876922] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:17:36,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [692303117] [2022-12-14 03:17:36,391 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 03:17:36,392 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:17:36,392 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:17:36,392 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:17:36,392 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:17:36,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:17:36,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:17:36,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:17:36,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:17:36,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:17:36,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:17:36,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:17:36,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:17:36,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:17:36,658 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:17:36,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:17:36,820 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:17:39,180 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15775#(and (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= |ULTIMATE.start_cstrstr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~s#1.offset|) (not (<= (+ |ULTIMATE.start_cstrlen_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlen_~s~0#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 03:17:39,180 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:17:39,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:17:39,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 55 [2022-12-14 03:17:39,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482572328] [2022-12-14 03:17:39,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:17:39,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-12-14 03:17:39,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:17:39,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-12-14 03:17:39,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=4076, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 03:17:39,181 INFO L87 Difference]: Start difference. First operand 296 states and 372 transitions. Second operand has 56 states, 56 states have (on average 1.6964285714285714) internal successors, (95), 55 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:17:47,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:17:47,362 INFO L93 Difference]: Finished difference Result 1639 states and 2131 transitions. [2022-12-14 03:17:47,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-14 03:17:47,363 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.6964285714285714) internal successors, (95), 55 states have internal predecessors, (95), 0 states have call successors, (0), 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 34 [2022-12-14 03:17:47,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:17:47,366 INFO L225 Difference]: With dead ends: 1639 [2022-12-14 03:17:47,366 INFO L226 Difference]: Without dead ends: 1625 [2022-12-14 03:17:47,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1947 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=868, Invalid=10688, Unknown=0, NotChecked=0, Total=11556 [2022-12-14 03:17:47,367 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 3918 mSDsluCounter, 6760 mSDsCounter, 0 mSdLazyCounter, 7507 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3918 SdHoareTripleChecker+Valid, 6965 SdHoareTripleChecker+Invalid, 7531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 7507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-12-14 03:17:47,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3918 Valid, 6965 Invalid, 7531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 7507 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-12-14 03:17:47,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1625 states. [2022-12-14 03:17:47,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1625 to 318. [2022-12-14 03:17:47,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 313 states have (on average 1.2747603833865815) internal successors, (399), 317 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:17:47,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 399 transitions. [2022-12-14 03:17:47,374 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 399 transitions. Word has length 34 [2022-12-14 03:17:47,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:17:47,374 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 399 transitions. [2022-12-14 03:17:47,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.6964285714285714) internal successors, (95), 55 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:17:47,375 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 399 transitions. [2022-12-14 03:17:47,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 03:17:47,375 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:17:47,375 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:17:47,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 03:17:47,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:17:47,577 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:17:47,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:17:47,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1842525155, now seen corresponding path program 5 times [2022-12-14 03:17:47,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:17:47,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796000757] [2022-12-14 03:17:47,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:17:47,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:17:47,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:17:48,436 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:17:48,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:17:48,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796000757] [2022-12-14 03:17:48,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796000757] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:17:48,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237583560] [2022-12-14 03:17:48,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 03:17:48,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:17:48,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:17:48,437 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:17:48,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 03:17:48,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 03:17:48,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:17:48,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 103 conjunts are in the unsatisfiable core [2022-12-14 03:17:48,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:17:48,672 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-14 03:17:48,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2022-12-14 03:17:49,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:17:49,259 INFO L321 Elim1Store]: treesize reduction 44, result has 18.5 percent of original size [2022-12-14 03:17:49,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-12-14 03:17:50,546 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 03:17:50,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 42 [2022-12-14 03:17:50,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:17:50,559 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-12-14 03:17:50,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2022-12-14 03:17:50,617 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:17:50,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:17:51,671 INFO L321 Elim1Store]: treesize reduction 27, result has 44.9 percent of original size [2022-12-14 03:17:51,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 274 treesize of output 217 [2022-12-14 03:17:51,684 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:17:51,685 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 69 treesize of output 65 [2022-12-14 03:17:51,695 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 56 treesize of output 48 [2022-12-14 03:17:51,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:17:51,734 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:17:51,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 81 treesize of output 100 [2022-12-14 03:17:57,352 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:17:57,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237583560] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:17:57,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [947285815] [2022-12-14 03:17:57,354 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 03:17:57,354 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:17:57,354 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:17:57,354 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:17:57,354 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:17:57,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:17:57,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:17:57,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:17:57,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:17:57,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:17:57,484 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 03:17:57,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 76 [2022-12-14 03:17:57,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:17:57,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:17:57,596 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:17:57,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:17:57,860 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:18:03,027 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18092#(and (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#res#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_cstrstr_~s#1.offset|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= |ULTIMATE.start_cstrlen_~s~0#1.offset| 1) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= |ULTIMATE.start_cstrstr_~len~0#1| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrstr_#t~post17#1.base|) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrstr_~len~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrlen_#res#1| 0) (<= 0 |ULTIMATE.start_cstrstr_#t~post17#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (= |#NULL.offset| 0) (< (select |#length| |ULTIMATE.start_cstrstr_#t~post17#1.base|) (+ |ULTIMATE.start_cstrstr_#t~post17#1.offset| 1)) (= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 03:18:03,028 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:18:03,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:18:03,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 23] total 61 [2022-12-14 03:18:03,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271431287] [2022-12-14 03:18:03,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:18:03,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-12-14 03:18:03,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:18:03,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-12-14 03:18:03,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=5825, Unknown=0, NotChecked=0, Total=6162 [2022-12-14 03:18:03,029 INFO L87 Difference]: Start difference. First operand 318 states and 399 transitions. Second operand has 62 states, 62 states have (on average 1.6129032258064515) internal successors, (100), 61 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:18:22,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:18:22,474 INFO L93 Difference]: Finished difference Result 571 states and 709 transitions. [2022-12-14 03:18:22,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-12-14 03:18:22,475 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.6129032258064515) internal successors, (100), 61 states have internal predecessors, (100), 0 states have call successors, (0), 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 [2022-12-14 03:18:22,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:18:22,475 INFO L225 Difference]: With dead ends: 571 [2022-12-14 03:18:22,475 INFO L226 Difference]: Without dead ends: 538 [2022-12-14 03:18:22,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3845 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=1386, Invalid=15906, Unknown=0, NotChecked=0, Total=17292 [2022-12-14 03:18:22,477 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1125 mSDsluCounter, 1049 mSDsCounter, 0 mSdLazyCounter, 2965 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1125 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 2990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-14 03:18:22,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1125 Valid, 1079 Invalid, 2990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2965 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-12-14 03:18:22,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-12-14 03:18:22,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 389. [2022-12-14 03:18:22,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 384 states have (on average 1.2578125) internal successors, (483), 388 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:18:22,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 483 transitions. [2022-12-14 03:18:22,481 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 483 transitions. Word has length 35 [2022-12-14 03:18:22,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:18:22,481 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 483 transitions. [2022-12-14 03:18:22,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.6129032258064515) internal successors, (100), 61 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:18:22,481 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 483 transitions. [2022-12-14 03:18:22,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 03:18:22,482 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:18:22,482 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:18:22,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-14 03:18:22,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-14 03:18:22,683 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:18:22,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:18:22,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1173068957, now seen corresponding path program 1 times [2022-12-14 03:18:22,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:18:22,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450867398] [2022-12-14 03:18:22,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:18:22,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:18:22,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:18:22,842 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 03:18:22,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:18:22,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450867398] [2022-12-14 03:18:22,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450867398] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:18:22,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142374447] [2022-12-14 03:18:22,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:18:22,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:18:22,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:18:22,843 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:18:22,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 03:18:22,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:18:22,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-14 03:18:22,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:18:23,018 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 03:18:23,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:18:23,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 03:18:23,174 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 03:18:23,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142374447] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:18:23,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [220240230] [2022-12-14 03:18:23,176 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-12-14 03:18:23,176 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:18:23,176 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:18:23,176 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:18:23,176 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:18:23,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:18:23,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:18:23,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:18:23,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:18:23,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:18:23,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2022-12-14 03:18:23,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:18:23,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:18:23,386 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:18:23,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:18:23,694 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:18:26,281 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19404#(and (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (= |ULTIMATE.start_cstrstr_~s#1.offset| |ULTIMATE.start_cstrncmp_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#res#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_cstrstr_~sc~0#1| |ULTIMATE.start_cstrstr_~c~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (= |ULTIMATE.start_cstrncmp_#in~s1#1.base| |ULTIMATE.start_cstrstr_~s#1.base|) (= |ULTIMATE.start_cstrstr_~find#1.base| |ULTIMATE.start_cstrncmp_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (= |ULTIMATE.start_cstrstr_~find#1.offset| |ULTIMATE.start_cstrncmp_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrstr_~s#1.offset|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (= |ULTIMATE.start_cstrncmp_~s1#1.offset| |ULTIMATE.start_cstrncmp_#in~s1#1.offset|) (= |ULTIMATE.start_cstrncmp_~s2#1.offset| |ULTIMATE.start_cstrncmp_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (= |ULTIMATE.start_cstrncmp_#in~n#1| |ULTIMATE.start_cstrncmp_~n#1|) (= |ULTIMATE.start_cstrncmp_~s2#1.base| |ULTIMATE.start_cstrncmp_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrstr_~len~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (not (<= (+ |ULTIMATE.start_cstrncmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrncmp_~s1#1.base|))) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (= |ULTIMATE.start_cstrncmp_#in~s1#1.base| |ULTIMATE.start_cstrncmp_~s1#1.base|) (= |ULTIMATE.start_cstrncmp_#in~n#1| |ULTIMATE.start_cstrstr_~len~0#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 03:18:26,281 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:18:26,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:18:26,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-12-14 03:18:26,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134799494] [2022-12-14 03:18:26,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:18:26,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 03:18:26,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:18:26,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 03:18:26,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1151, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 03:18:26,283 INFO L87 Difference]: Start difference. First operand 389 states and 483 transitions. Second operand has 19 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:18:26,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:18:26,777 INFO L93 Difference]: Finished difference Result 468 states and 559 transitions. [2022-12-14 03:18:26,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 03:18:26,777 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 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 36 [2022-12-14 03:18:26,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:18:26,778 INFO L225 Difference]: With dead ends: 468 [2022-12-14 03:18:26,778 INFO L226 Difference]: Without dead ends: 468 [2022-12-14 03:18:26,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 74 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=322, Invalid=2030, Unknown=0, NotChecked=0, Total=2352 [2022-12-14 03:18:26,778 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 385 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 03:18:26,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 430 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 03:18:26,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-12-14 03:18:26,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 389. [2022-12-14 03:18:26,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 384 states have (on average 1.2552083333333333) internal successors, (482), 388 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:18:26,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 482 transitions. [2022-12-14 03:18:26,783 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 482 transitions. Word has length 36 [2022-12-14 03:18:26,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:18:26,783 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 482 transitions. [2022-12-14 03:18:26,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:18:26,783 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 482 transitions. [2022-12-14 03:18:26,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 03:18:26,784 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:18:26,784 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:18:26,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-14 03:18:26,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-14 03:18:26,985 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:18:26,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:18:26,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1424396807, now seen corresponding path program 1 times [2022-12-14 03:18:26,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:18:26,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752907583] [2022-12-14 03:18:26,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:18:26,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:18:27,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:18:27,117 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 03:18:27,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:18:27,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752907583] [2022-12-14 03:18:27,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752907583] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:18:27,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127018725] [2022-12-14 03:18:27,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:18:27,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:18:27,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:18:27,119 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:18:27,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 03:18:27,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:18:27,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-14 03:18:27,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:18:27,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 03:18:27,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:18:27,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 03:18:27,505 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 03:18:27,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-12-14 03:18:27,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 03:18:27,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:18:27,633 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:18:27,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 03:18:27,636 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:18:27,637 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 37 treesize of output 32 [2022-12-14 03:18:27,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 03:18:27,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127018725] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:18:27,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1064358126] [2022-12-14 03:18:27,745 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-12-14 03:18:27,745 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:18:27,745 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:18:27,745 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:18:27,745 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:18:27,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:18:27,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:18:27,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:18:27,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:18:27,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:18:27,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2022-12-14 03:18:27,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:18:27,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:18:27,945 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:18:27,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:18:29,055 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:18:35,320 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20538#(and (not (<= (+ |ULTIMATE.start_cstrncmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrncmp_~s1#1.base|))) (or (and (<= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= |ULTIMATE.start_cstrncmp_~s1#1.offset| 1) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_cstrstr_~s#1.offset|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= |ULTIMATE.start_cstrncmp_~s2#1.offset| 1) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncmp_~n#1|) (<= |ULTIMATE.start_cstrncmp_#in~s1#1.offset| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|)) (and (<= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 2 |ULTIMATE.start_cstrncmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 0 |#NULL.base|) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#res#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 2 |ULTIMATE.start_cstrncmp_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrncmp_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrncmp_#in~s2#1.offset| 1) (<= 1 |ULTIMATE.start_cstrstr_~s#1.offset|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrncmp_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrncmp_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (<= 0 |ULTIMATE.start_cstrncmp_~s1#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrstr_~len~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncmp_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.offset|) (<= |ULTIMATE.start_cstrstr_~s#1.offset| 1) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_cstrncmp_#in~s1#1.offset| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|))) (or (and (<= |ULTIMATE.start_cstrncmp_~s1#1.offset| (select |#length| |ULTIMATE.start_cstrncmp_~s1#1.base|)) (<= 2 |ULTIMATE.start_cstrncmp_~s2#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrncmp_~s1#1.base|) 1) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (not (= (select (select |#memory_int| |ULTIMATE.start_cstrncmp_~s1#1.base|) (+ (- 1) |ULTIMATE.start_cstrncmp_~s1#1.offset|)) 0))) (and (= |ULTIMATE.start_cstrstr_~sc~0#1| |ULTIMATE.start_cstrstr_~c~0#1|) (<= |ULTIMATE.start_cstrstr_~s#1.offset| (select |#length| |ULTIMATE.start_cstrstr_~s#1.base|)) (= |ULTIMATE.start_cstrlen_~s~0#1.offset| (+ |ULTIMATE.start_cstrlen_#res#1| |ULTIMATE.start_cstrlen_~str#1.offset|)) (= |ULTIMATE.start_cstrncmp_#in~s1#1.base| |ULTIMATE.start_cstrstr_~s#1.base|) (= |ULTIMATE.start_cstrstr_~find#1.base| |ULTIMATE.start_cstrncmp_#in~s2#1.base|) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (= |ULTIMATE.start_cstrncmp_~s2#1.offset| |ULTIMATE.start_cstrncmp_#in~s2#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrstr_~s#1.base|) 1) (= |ULTIMATE.start_cstrncmp_#in~n#1| |ULTIMATE.start_cstrncmp_~n#1|) (= |ULTIMATE.start_cstrncmp_~s2#1.base| |ULTIMATE.start_cstrncmp_#in~s2#1.base|) (not (= |ULTIMATE.start_cstrstr_~sc~0#1| 0)) (= |ULTIMATE.start_cstrstr_~sc~0#1| (select (select |#memory_int| |ULTIMATE.start_cstrstr_~s#1.base|) (+ (- 1) |ULTIMATE.start_cstrstr_~s#1.offset|))) (= |ULTIMATE.start_cstrncmp_#in~s1#1.base| |ULTIMATE.start_cstrncmp_~s1#1.base|) (= |ULTIMATE.start_cstrncmp_#in~n#1| |ULTIMATE.start_cstrstr_~len~0#1|) (= |ULTIMATE.start_cstrlen_#res#1| |ULTIMATE.start_cstrstr_~len~0#1|))))' at error location [2022-12-14 03:18:35,320 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:18:35,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:18:35,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 12] total 25 [2022-12-14 03:18:35,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255946883] [2022-12-14 03:18:35,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:18:35,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 03:18:35,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:18:35,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 03:18:35,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1991, Unknown=8, NotChecked=0, Total=2162 [2022-12-14 03:18:35,321 INFO L87 Difference]: Start difference. First operand 389 states and 482 transitions. Second operand has 25 states, 25 states have (on average 3.28) internal successors, (82), 25 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:18:36,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:18:36,476 INFO L93 Difference]: Finished difference Result 492 states and 592 transitions. [2022-12-14 03:18:36,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 03:18:36,477 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.28) internal successors, (82), 25 states have internal predecessors, (82), 0 states have call successors, (0), 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 36 [2022-12-14 03:18:36,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:18:36,477 INFO L225 Difference]: With dead ends: 492 [2022-12-14 03:18:36,477 INFO L226 Difference]: Without dead ends: 428 [2022-12-14 03:18:36,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=407, Invalid=4006, Unknown=9, NotChecked=0, Total=4422 [2022-12-14 03:18:36,478 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 280 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 03:18:36,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 601 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 03:18:36,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-12-14 03:18:36,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 365. [2022-12-14 03:18:36,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 360 states have (on average 1.2638888888888888) internal successors, (455), 364 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:18:36,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 455 transitions. [2022-12-14 03:18:36,481 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 455 transitions. Word has length 36 [2022-12-14 03:18:36,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:18:36,482 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 455 transitions. [2022-12-14 03:18:36,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.28) internal successors, (82), 25 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:18:36,482 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 455 transitions. [2022-12-14 03:18:36,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 03:18:36,482 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:18:36,482 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:18:36,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-14 03:18:36,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:18:36,684 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:18:36,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:18:36,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1500585792, now seen corresponding path program 8 times [2022-12-14 03:18:36,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:18:36,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051110283] [2022-12-14 03:18:36,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:18:36,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:18:36,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:18:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:18:37,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:18:37,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051110283] [2022-12-14 03:18:37,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051110283] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:18:37,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909339597] [2022-12-14 03:18:37,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 03:18:37,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:18:37,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:18:37,051 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:18:37,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 03:18:37,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-14 03:18:37,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:18:37,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 84 conjunts are in the unsatisfiable core [2022-12-14 03:18:37,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:18:37,183 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 03:18:37,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 03:18:37,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 03:18:37,940 INFO L321 Elim1Store]: treesize reduction 16, result has 86.6 percent of original size [2022-12-14 03:18:37,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 49 treesize of output 125 [2022-12-14 03:18:38,370 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 29 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 03:18:38,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:18:39,626 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 70 treesize of output 60 [2022-12-14 03:18:39,666 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:18:39,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 94 treesize of output 164 [2022-12-14 03:18:40,093 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 1 proven. 64 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 03:18:40,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909339597] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:18:40,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [185531418] [2022-12-14 03:18:40,094 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 03:18:40,094 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:18:40,094 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:18:40,094 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:18:40,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:18:40,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:18:40,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:18:40,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:18:40,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:18:40,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:18:40,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:18:40,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:18:40,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:18:40,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:18:40,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:18:40,352 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:18:40,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:18:40,622 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:18:43,165 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21728#(and (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= |ULTIMATE.start_cstrstr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~s#1.offset|) (<= 2 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (not (<= (+ |ULTIMATE.start_cstrlen_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlen_~s~0#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 03:18:43,165 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:18:43,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:18:43,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 59 [2022-12-14 03:18:43,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379937875] [2022-12-14 03:18:43,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:18:43,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-12-14 03:18:43,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:18:43,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-12-14 03:18:43,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=4562, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 03:18:43,166 INFO L87 Difference]: Start difference. First operand 365 states and 455 transitions. Second operand has 60 states, 60 states have (on average 1.5666666666666667) internal successors, (94), 59 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:18:59,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:18:59,286 INFO L93 Difference]: Finished difference Result 2259 states and 2932 transitions. [2022-12-14 03:18:59,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-12-14 03:18:59,287 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.5666666666666667) internal successors, (94), 59 states have internal predecessors, (94), 0 states have call successors, (0), 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 36 [2022-12-14 03:18:59,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:18:59,290 INFO L225 Difference]: With dead ends: 2259 [2022-12-14 03:18:59,290 INFO L226 Difference]: Without dead ends: 2243 [2022-12-14 03:18:59,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6589 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=3215, Invalid=21591, Unknown=0, NotChecked=0, Total=24806 [2022-12-14 03:18:59,291 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 8689 mSDsluCounter, 4855 mSDsCounter, 0 mSdLazyCounter, 6095 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8689 SdHoareTripleChecker+Valid, 5051 SdHoareTripleChecker+Invalid, 6123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 6095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-12-14 03:18:59,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8689 Valid, 5051 Invalid, 6123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 6095 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-12-14 03:18:59,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2243 states. [2022-12-14 03:18:59,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2243 to 407. [2022-12-14 03:18:59,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 402 states have (on average 1.263681592039801) internal successors, (508), 406 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:18:59,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 508 transitions. [2022-12-14 03:18:59,309 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 508 transitions. Word has length 36 [2022-12-14 03:18:59,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:18:59,309 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 508 transitions. [2022-12-14 03:18:59,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.5666666666666667) internal successors, (94), 59 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:18:59,310 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 508 transitions. [2022-12-14 03:18:59,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 03:18:59,310 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:18:59,310 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:18:59,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-14 03:18:59,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:18:59,511 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:18:59,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:18:59,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1184097951, now seen corresponding path program 6 times [2022-12-14 03:18:59,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:18:59,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866633784] [2022-12-14 03:18:59,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:18:59,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:18:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:18:59,679 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:18:59,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:18:59,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866633784] [2022-12-14 03:18:59,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866633784] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:18:59,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326716695] [2022-12-14 03:18:59,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 03:18:59,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:18:59,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:18:59,681 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:18:59,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-14 03:18:59,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 03:18:59,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:18:59,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-14 03:18:59,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:18:59,865 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:18:59,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:19:00,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 03:19:00,034 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:19:00,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326716695] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:19:00,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [127309696] [2022-12-14 03:19:00,035 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 03:19:00,035 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:19:00,036 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:19:00,036 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:19:00,036 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:19:00,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:19:00,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:19:00,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:19:00,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:19:00,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:19:00,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2022-12-14 03:19:00,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:19:00,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:19:00,261 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:19:00,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:19:00,553 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:19:03,738 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24817#(and (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#res#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_cstrstr_~s#1.offset|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= |ULTIMATE.start_cstrlen_~s~0#1.offset| 1) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= |ULTIMATE.start_cstrstr_~len~0#1| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrstr_#t~post17#1.base|) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrstr_~len~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrlen_#res#1| 0) (<= 0 |ULTIMATE.start_cstrstr_#t~post17#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (= |#NULL.offset| 0) (< (select |#length| |ULTIMATE.start_cstrstr_#t~post17#1.base|) (+ |ULTIMATE.start_cstrstr_#t~post17#1.offset| 1)) (= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 03:19:03,738 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:19:03,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:19:03,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-12-14 03:19:03,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011749479] [2022-12-14 03:19:03,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:19:03,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 03:19:03,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:19:03,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 03:19:03,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1291, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 03:19:03,739 INFO L87 Difference]: Start difference. First operand 407 states and 508 transitions. Second operand has 22 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:19:04,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:19:04,329 INFO L93 Difference]: Finished difference Result 714 states and 891 transitions. [2022-12-14 03:19:04,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 03:19:04,329 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 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 37 [2022-12-14 03:19:04,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:19:04,332 INFO L225 Difference]: With dead ends: 714 [2022-12-14 03:19:04,333 INFO L226 Difference]: Without dead ends: 714 [2022-12-14 03:19:04,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 79 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=342, Invalid=2208, Unknown=0, NotChecked=0, Total=2550 [2022-12-14 03:19:04,333 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 582 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 03:19:04,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [582 Valid, 600 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 03:19:04,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-12-14 03:19:04,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 563. [2022-12-14 03:19:04,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 558 states have (on average 1.2885304659498207) internal successors, (719), 562 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:19:04,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 719 transitions. [2022-12-14 03:19:04,341 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 719 transitions. Word has length 37 [2022-12-14 03:19:04,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:19:04,342 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 719 transitions. [2022-12-14 03:19:04,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:19:04,342 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 719 transitions. [2022-12-14 03:19:04,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 03:19:04,343 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:19:04,343 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:19:04,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-14 03:19:04,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-12-14 03:19:04,544 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:19:04,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:19:04,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1744505507, now seen corresponding path program 1 times [2022-12-14 03:19:04,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:19:04,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985932230] [2022-12-14 03:19:04,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:19:04,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:19:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:19:04,872 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 03:19:04,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:19:04,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985932230] [2022-12-14 03:19:04,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985932230] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:19:04,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337894694] [2022-12-14 03:19:04,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:19:04,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:19:04,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:19:04,873 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:19:04,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-14 03:19:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:19:04,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 57 conjunts are in the unsatisfiable core [2022-12-14 03:19:04,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:19:04,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 03:19:05,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:19:05,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 03:19:05,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:19:05,466 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:19:05,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-12-14 03:19:05,468 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 03:19:05,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:19:05,621 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:19:05,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 03:19:05,626 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:19:05,626 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 37 treesize of output 36 [2022-12-14 03:19:05,629 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 11 treesize of output 7 [2022-12-14 03:19:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 03:19:05,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337894694] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:19:05,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1575032275] [2022-12-14 03:19:05,943 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 03:19:05,943 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:19:05,944 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:19:05,944 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:19:05,944 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:19:05,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:19:05,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:19:05,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:19:06,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:19:06,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:19:06,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2022-12-14 03:19:06,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:19:06,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:19:06,157 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:19:06,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:19:06,567 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:19:10,174 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26399#(and (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#res#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_cstrstr_~s#1.offset|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrstr_#t~post17#1.base|) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrstr_~len~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#t~post17#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (= |#NULL.offset| 0) (< (select |#length| |ULTIMATE.start_cstrstr_#t~post17#1.base|) (+ |ULTIMATE.start_cstrstr_#t~post17#1.offset| 1)) (= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 03:19:10,174 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:19:10,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:19:10,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-12-14 03:19:10,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713381744] [2022-12-14 03:19:10,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:19:10,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 03:19:10,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:19:10,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 03:19:10,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2371, Unknown=0, NotChecked=0, Total=2550 [2022-12-14 03:19:10,176 INFO L87 Difference]: Start difference. First operand 563 states and 719 transitions. Second operand has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 35 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:19:11,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:19:11,282 INFO L93 Difference]: Finished difference Result 652 states and 811 transitions. [2022-12-14 03:19:11,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 03:19:11,282 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 35 states have internal predecessors, (86), 0 states have call successors, (0), 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 39 [2022-12-14 03:19:11,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:19:11,284 INFO L225 Difference]: With dead ends: 652 [2022-12-14 03:19:11,285 INFO L226 Difference]: Without dead ends: 612 [2022-12-14 03:19:11,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=373, Invalid=3659, Unknown=0, NotChecked=0, Total=4032 [2022-12-14 03:19:11,285 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 423 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 03:19:11,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 1032 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 03:19:11,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-12-14 03:19:11,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 556. [2022-12-14 03:19:11,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 551 states have (on average 1.281306715063521) internal successors, (706), 555 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:19:11,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 706 transitions. [2022-12-14 03:19:11,289 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 706 transitions. Word has length 39 [2022-12-14 03:19:11,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:19:11,289 INFO L495 AbstractCegarLoop]: Abstraction has 556 states and 706 transitions. [2022-12-14 03:19:11,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 35 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:19:11,290 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 706 transitions. [2022-12-14 03:19:11,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 03:19:11,290 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:19:11,290 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:19:11,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-14 03:19:11,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-12-14 03:19:11,491 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:19:11,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:19:11,492 INFO L85 PathProgramCache]: Analyzing trace with hash 206515061, now seen corresponding path program 1 times [2022-12-14 03:19:11,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:19:11,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575784081] [2022-12-14 03:19:11,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:19:11,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:19:11,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:19:11,792 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 03:19:11,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:19:11,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575784081] [2022-12-14 03:19:11,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575784081] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:19:11,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642378003] [2022-12-14 03:19:11,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:19:11,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:19:11,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:19:11,793 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:19:11,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-14 03:19:11,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:19:11,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-14 03:19:11,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:19:12,015 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 03:19:12,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:19:12,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 03:19:12,218 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 03:19:12,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642378003] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:19:12,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1225858239] [2022-12-14 03:19:12,220 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-12-14 03:19:12,220 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:19:12,220 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:19:12,220 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:19:12,220 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:19:12,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:19:12,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:19:12,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:19:12,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:19:12,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:19:12,359 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 03:19:12,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 76 [2022-12-14 03:19:12,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:19:12,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:19:12,472 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:19:12,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:19:12,824 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:19:16,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1225858239] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:19:16,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:19:16,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [11, 10, 10] total 45 [2022-12-14 03:19:16,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71684003] [2022-12-14 03:19:16,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:19:16,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 03:19:16,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:19:16,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 03:19:16,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1804, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 03:19:16,985 INFO L87 Difference]: Start difference. First operand 556 states and 706 transitions. Second operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:19:21,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:19:21,278 INFO L93 Difference]: Finished difference Result 639 states and 784 transitions. [2022-12-14 03:19:21,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 03:19:21,279 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-12-14 03:19:21,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:19:21,280 INFO L225 Difference]: With dead ends: 639 [2022-12-14 03:19:21,280 INFO L226 Difference]: Without dead ends: 595 [2022-12-14 03:19:21,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=446, Invalid=2860, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 03:19:21,280 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 154 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 03:19:21,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 142 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 03:19:21,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-12-14 03:19:21,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 525. [2022-12-14 03:19:21,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 520 states have (on average 1.273076923076923) internal successors, (662), 524 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:19:21,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 662 transitions. [2022-12-14 03:19:21,284 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 662 transitions. Word has length 40 [2022-12-14 03:19:21,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:19:21,285 INFO L495 AbstractCegarLoop]: Abstraction has 525 states and 662 transitions. [2022-12-14 03:19:21,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:19:21,285 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 662 transitions. [2022-12-14 03:19:21,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 03:19:21,285 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:19:21,285 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:19:21,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-12-14 03:19:21,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-12-14 03:19:21,486 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:19:21,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:19:21,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1904750615, now seen corresponding path program 7 times [2022-12-14 03:19:21,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:19:21,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292271923] [2022-12-14 03:19:21,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:19:21,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:19:21,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:19:21,864 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:19:21,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:19:21,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292271923] [2022-12-14 03:19:21,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292271923] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:19:21,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013217603] [2022-12-14 03:19:21,865 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 03:19:21,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:19:21,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:19:21,865 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:19:21,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-14 03:19:21,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:19:21,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-14 03:19:21,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:19:21,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 03:19:22,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:19:22,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 03:19:22,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:19:22,637 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:19:22,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-12-14 03:19:22,640 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:19:22,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:19:22,861 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:19:22,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 03:19:22,867 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:19:22,867 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 37 treesize of output 36 [2022-12-14 03:19:22,871 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 11 treesize of output 7 [2022-12-14 03:19:23,329 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:19:23,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013217603] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:19:23,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [765086513] [2022-12-14 03:19:23,330 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 03:19:23,331 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:19:23,331 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:19:23,331 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:19:23,331 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:19:23,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:19:23,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:19:23,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:19:23,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:19:23,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:19:23,470 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 03:19:23,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 76 [2022-12-14 03:19:23,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:19:23,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:19:23,582 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:19:23,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:19:23,872 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:19:28,116 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29397#(and (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#res#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_cstrstr_~s#1.offset|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= |ULTIMATE.start_cstrlen_~s~0#1.offset| 1) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= |ULTIMATE.start_cstrstr_~len~0#1| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrstr_#t~post17#1.base|) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrstr_~len~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrlen_#res#1| 0) (<= 0 |ULTIMATE.start_cstrstr_#t~post17#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (= |#NULL.offset| 0) (< (select |#length| |ULTIMATE.start_cstrstr_#t~post17#1.base|) (+ |ULTIMATE.start_cstrstr_#t~post17#1.offset| 1)) (= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 03:19:28,116 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:19:28,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:19:28,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 40 [2022-12-14 03:19:28,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438011826] [2022-12-14 03:19:28,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:19:28,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-14 03:19:28,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:19:28,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-14 03:19:28,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=3082, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 03:19:28,117 INFO L87 Difference]: Start difference. First operand 525 states and 662 transitions. Second operand has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:19:29,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:19:29,742 INFO L93 Difference]: Finished difference Result 866 states and 1068 transitions. [2022-12-14 03:19:29,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 03:19:29,742 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 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 41 [2022-12-14 03:19:29,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:19:29,743 INFO L225 Difference]: With dead ends: 866 [2022-12-14 03:19:29,743 INFO L226 Difference]: Without dead ends: 805 [2022-12-14 03:19:29,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=402, Invalid=4568, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 03:19:29,744 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 622 mSDsluCounter, 1841 mSDsCounter, 0 mSdLazyCounter, 1788 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 1932 SdHoareTripleChecker+Invalid, 1798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:19:29,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [622 Valid, 1932 Invalid, 1798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1788 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 03:19:29,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-12-14 03:19:29,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 729. [2022-12-14 03:19:29,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 724 states have (on average 1.2734806629834254) internal successors, (922), 728 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:19:29,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 922 transitions. [2022-12-14 03:19:29,749 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 922 transitions. Word has length 41 [2022-12-14 03:19:29,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:19:29,749 INFO L495 AbstractCegarLoop]: Abstraction has 729 states and 922 transitions. [2022-12-14 03:19:29,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:19:29,749 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 922 transitions. [2022-12-14 03:19:29,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 03:19:29,750 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:19:29,750 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:19:29,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-12-14 03:19:29,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:19:29,951 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:19:29,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:19:29,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1570501911, now seen corresponding path program 2 times [2022-12-14 03:19:29,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:19:29,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206119208] [2022-12-14 03:19:29,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:19:29,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:19:29,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:19:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 03:19:30,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:19:30,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206119208] [2022-12-14 03:19:30,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206119208] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:19:30,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050365362] [2022-12-14 03:19:30,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 03:19:30,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:19:30,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:19:30,188 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:19:30,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-14 03:19:30,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 03:19:30,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:19:30,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 115 conjunts are in the unsatisfiable core [2022-12-14 03:19:30,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:19:30,323 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 18 treesize of output 16 [2022-12-14 03:19:30,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:19:30,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-12-14 03:19:31,547 INFO L321 Elim1Store]: treesize reduction 12, result has 78.9 percent of original size [2022-12-14 03:19:31,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 59 treesize of output 69 [2022-12-14 03:19:31,796 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 03:19:31,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:19:33,374 INFO L321 Elim1Store]: treesize reduction 79, result has 33.6 percent of original size [2022-12-14 03:19:33,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 310 treesize of output 272 [2022-12-14 03:19:33,396 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:19:33,397 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 164 treesize of output 152 [2022-12-14 03:19:33,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 03:19:33,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:19:33,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:19:33,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:19:33,432 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:19:33,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 131 treesize of output 132 [2022-12-14 03:19:33,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:19:33,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:19:33,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:19:33,522 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:19:33,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 91 treesize of output 160 [2022-12-14 03:19:35,581 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 03:19:35,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050365362] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:19:35,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1635669376] [2022-12-14 03:19:35,583 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-12-14 03:19:35,583 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:19:35,583 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:19:35,583 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:19:35,583 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:19:35,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:19:35,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:19:35,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:19:35,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:19:35,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:19:35,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2022-12-14 03:19:35,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:19:35,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:19:35,829 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:19:35,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:19:36,154 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:19:40,567 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31335#(and (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (= |ULTIMATE.start_cstrstr_~s#1.offset| |ULTIMATE.start_cstrncmp_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#res#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_cstrstr_~sc~0#1| |ULTIMATE.start_cstrstr_~c~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (= |ULTIMATE.start_cstrncmp_#in~s1#1.base| |ULTIMATE.start_cstrstr_~s#1.base|) (= |ULTIMATE.start_cstrstr_~find#1.base| |ULTIMATE.start_cstrncmp_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (= |ULTIMATE.start_cstrstr_~find#1.offset| |ULTIMATE.start_cstrncmp_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrstr_~s#1.offset|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (= |ULTIMATE.start_cstrncmp_~s1#1.offset| |ULTIMATE.start_cstrncmp_#in~s1#1.offset|) (= |ULTIMATE.start_cstrncmp_~s2#1.offset| |ULTIMATE.start_cstrncmp_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (= |ULTIMATE.start_cstrncmp_#in~n#1| |ULTIMATE.start_cstrncmp_~n#1|) (= |ULTIMATE.start_cstrncmp_~s2#1.base| |ULTIMATE.start_cstrncmp_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrstr_~len~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (not (<= (+ |ULTIMATE.start_cstrncmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrncmp_~s1#1.base|))) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (= |ULTIMATE.start_cstrncmp_#in~s1#1.base| |ULTIMATE.start_cstrncmp_~s1#1.base|) (= |ULTIMATE.start_cstrncmp_#in~n#1| |ULTIMATE.start_cstrstr_~len~0#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 03:19:40,567 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:19:40,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:19:40,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 21, 20] total 52 [2022-12-14 03:19:40,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320805730] [2022-12-14 03:19:40,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:19:40,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-14 03:19:40,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:19:40,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-14 03:19:40,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=4612, Unknown=0, NotChecked=0, Total=5112 [2022-12-14 03:19:40,569 INFO L87 Difference]: Start difference. First operand 729 states and 922 transitions. Second operand has 54 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 53 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:19:58,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:19:58,762 INFO L93 Difference]: Finished difference Result 1172 states and 1414 transitions. [2022-12-14 03:19:58,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-12-14 03:19:58,762 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 53 states have internal predecessors, (105), 0 states have call successors, (0), 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 42 [2022-12-14 03:19:58,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:19:58,764 INFO L225 Difference]: With dead ends: 1172 [2022-12-14 03:19:58,764 INFO L226 Difference]: Without dead ends: 1103 [2022-12-14 03:19:58,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8895 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=5446, Invalid=29710, Unknown=0, NotChecked=0, Total=35156 [2022-12-14 03:19:58,765 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 3650 mSDsluCounter, 1041 mSDsCounter, 0 mSdLazyCounter, 2963 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3650 SdHoareTripleChecker+Valid, 1109 SdHoareTripleChecker+Invalid, 2995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 03:19:58,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3650 Valid, 1109 Invalid, 2995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2963 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 03:19:58,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2022-12-14 03:19:58,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 696. [2022-12-14 03:19:58,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 691 states have (on average 1.276410998552822) internal successors, (882), 695 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:19:58,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 882 transitions. [2022-12-14 03:19:58,772 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 882 transitions. Word has length 42 [2022-12-14 03:19:58,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:19:58,772 INFO L495 AbstractCegarLoop]: Abstraction has 696 states and 882 transitions. [2022-12-14 03:19:58,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 53 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:19:58,772 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 882 transitions. [2022-12-14 03:19:58,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 03:19:58,773 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:19:58,773 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:19:58,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-14 03:19:58,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-12-14 03:19:58,974 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:19:58,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:19:58,975 INFO L85 PathProgramCache]: Analyzing trace with hash 864452867, now seen corresponding path program 2 times [2022-12-14 03:19:58,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:19:58,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714592744] [2022-12-14 03:19:58,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:19:58,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:19:58,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:19:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 03:19:59,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:19:59,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714592744] [2022-12-14 03:19:59,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714592744] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:19:59,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995308281] [2022-12-14 03:19:59,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 03:19:59,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:19:59,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:19:59,156 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:19:59,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-14 03:19:59,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 03:19:59,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:19:59,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-14 03:19:59,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:19:59,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 03:19:59,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:19:59,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 03:19:59,678 INFO L321 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2022-12-14 03:19:59,678 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 25 treesize of output 23 [2022-12-14 03:19:59,726 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 03:19:59,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:20:00,113 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:20:00,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 34 [2022-12-14 03:20:00,124 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:20:00,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 57 [2022-12-14 03:20:00,129 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 18 [2022-12-14 03:20:00,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-12-14 03:20:00,283 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 03:20:00,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995308281] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:20:00,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [758850642] [2022-12-14 03:20:00,284 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-12-14 03:20:00,284 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:20:00,285 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:20:00,285 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:20:00,285 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:20:00,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:00,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:20:00,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:20:00,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:20:00,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:20:00,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2022-12-14 03:20:00,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:20:00,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:20:00,523 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:20:00,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:20:01,205 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:20:06,523 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33730#(and (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 1 |ULTIMATE.start_cstrncmp_~s1#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrncmp_~s1#1.base|) (+ |ULTIMATE.start_cstrncmp_~s1#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlen_#res#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrncmp_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrncmp_#in~s2#1.offset| 1) (<= 1 |ULTIMATE.start_cstrstr_~s#1.offset|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrncmp_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrncmp_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (<= 0 |ULTIMATE.start_cstrncmp_~s1#1.base|) (= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrstr_~len~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncmp_#in~n#1|) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= |ULTIMATE.start_cstrstr_~s#1.offset| 1) (<= |ULTIMATE.start_cstrncmp_#in~s1#1.offset| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 03:20:06,524 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:20:06,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:20:06,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2022-12-14 03:20:06,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274848525] [2022-12-14 03:20:06,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:20:06,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 03:20:06,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:20:06,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 03:20:06,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2523, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 03:20:06,525 INFO L87 Difference]: Start difference. First operand 696 states and 882 transitions. Second operand has 31 states, 30 states have (on average 3.033333333333333) internal successors, (91), 30 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:20:08,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:20:08,999 INFO L93 Difference]: Finished difference Result 1181 states and 1440 transitions. [2022-12-14 03:20:08,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-14 03:20:08,999 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.033333333333333) internal successors, (91), 30 states have internal predecessors, (91), 0 states have call successors, (0), 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 42 [2022-12-14 03:20:08,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:20:09,001 INFO L225 Difference]: With dead ends: 1181 [2022-12-14 03:20:09,001 INFO L226 Difference]: Without dead ends: 1181 [2022-12-14 03:20:09,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 78 SyntacticMatches, 4 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1884 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1120, Invalid=7070, Unknown=0, NotChecked=0, Total=8190 [2022-12-14 03:20:09,002 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1094 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1094 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 03:20:09,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1094 Valid, 428 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 03:20:09,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2022-12-14 03:20:09,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 738. [2022-12-14 03:20:09,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 733 states have (on average 1.2701227830832196) internal successors, (931), 737 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:20:09,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 931 transitions. [2022-12-14 03:20:09,008 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 931 transitions. Word has length 42 [2022-12-14 03:20:09,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:20:09,008 INFO L495 AbstractCegarLoop]: Abstraction has 738 states and 931 transitions. [2022-12-14 03:20:09,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.033333333333333) internal successors, (91), 30 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:20:09,008 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 931 transitions. [2022-12-14 03:20:09,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 03:20:09,009 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:20:09,009 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:20:09,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-14 03:20:09,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:20:09,210 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:20:09,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:20:09,211 INFO L85 PathProgramCache]: Analyzing trace with hash 969972269, now seen corresponding path program 8 times [2022-12-14 03:20:09,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:20:09,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808462755] [2022-12-14 03:20:09,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:20:09,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:20:09,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:20:09,462 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:20:09,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:20:09,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808462755] [2022-12-14 03:20:09,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808462755] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:20:09,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303364960] [2022-12-14 03:20:09,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 03:20:09,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:20:09,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:20:09,463 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:20:09,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-14 03:20:09,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 03:20:09,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:20:09,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-14 03:20:09,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:20:09,662 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 03:20:09,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 03:20:09,667 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 9 treesize of output 11 [2022-12-14 03:20:09,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 03:20:09,848 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 11 treesize of output 7 [2022-12-14 03:20:09,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-12-14 03:20:10,156 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:20:10,156 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 22 treesize of output 19 [2022-12-14 03:20:10,247 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 03:20:10,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:20:10,543 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:20:10,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 03:20:10,551 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:20:10,551 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 37 treesize of output 34 [2022-12-14 03:20:10,556 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 11 treesize of output 7 [2022-12-14 03:20:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 03:20:10,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303364960] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:20:10,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1759364299] [2022-12-14 03:20:10,731 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 03:20:10,731 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:20:10,731 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:20:10,732 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:20:10,732 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:20:10,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:10,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:20:10,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:20:10,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:20:10,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:20:10,859 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 03:20:10,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 76 [2022-12-14 03:20:10,898 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 [2022-12-14 03:20:10,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:20:10,960 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:20:10,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:20:11,234 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:20:14,489 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '36028#(and (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#res#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_cstrstr_~s#1.offset|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= |ULTIMATE.start_cstrlen_~s~0#1.offset| 1) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= |ULTIMATE.start_cstrstr_~len~0#1| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrstr_#t~post17#1.base|) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrstr_~len~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrlen_#res#1| 0) (<= 0 |ULTIMATE.start_cstrstr_#t~post17#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (= |#NULL.offset| 0) (< (select |#length| |ULTIMATE.start_cstrstr_#t~post17#1.base|) (+ |ULTIMATE.start_cstrstr_#t~post17#1.offset| 1)) (= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 03:20:14,490 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:20:14,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:20:14,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 27 [2022-12-14 03:20:14,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694261946] [2022-12-14 03:20:14,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:20:14,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 03:20:14,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:20:14,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 03:20:14,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1855, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 03:20:14,491 INFO L87 Difference]: Start difference. First operand 738 states and 931 transitions. Second operand has 29 states, 28 states have (on average 3.25) internal successors, (91), 28 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:20:19,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:20:19,871 INFO L93 Difference]: Finished difference Result 811 states and 986 transitions. [2022-12-14 03:20:19,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-14 03:20:19,871 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.25) internal successors, (91), 28 states have internal predecessors, (91), 0 states have call successors, (0), 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 43 [2022-12-14 03:20:19,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:20:19,872 INFO L225 Difference]: With dead ends: 811 [2022-12-14 03:20:19,872 INFO L226 Difference]: Without dead ends: 764 [2022-12-14 03:20:19,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1099, Invalid=5543, Unknown=0, NotChecked=0, Total=6642 [2022-12-14 03:20:19,873 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 979 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 1227 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 03:20:19,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [979 Valid, 795 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1227 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 03:20:19,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-12-14 03:20:19,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 691. [2022-12-14 03:20:19,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 687 states have (on average 1.264919941775837) internal successors, (869), 690 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:20:19,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 869 transitions. [2022-12-14 03:20:19,877 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 869 transitions. Word has length 43 [2022-12-14 03:20:19,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:20:19,878 INFO L495 AbstractCegarLoop]: Abstraction has 691 states and 869 transitions. [2022-12-14 03:20:19,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.25) internal successors, (91), 28 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:20:19,878 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 869 transitions. [2022-12-14 03:20:19,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 03:20:19,878 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:20:19,878 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:20:19,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-14 03:20:20,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:20:20,080 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:20:20,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:20:20,081 INFO L85 PathProgramCache]: Analyzing trace with hash 507083029, now seen corresponding path program 1 times [2022-12-14 03:20:20,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:20:20,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463884002] [2022-12-14 03:20:20,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:20:20,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:20:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:20:20,354 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 03:20:20,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:20:20,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463884002] [2022-12-14 03:20:20,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463884002] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:20:20,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390527652] [2022-12-14 03:20:20,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:20:20,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:20:20,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:20:20,356 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:20:20,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-14 03:20:20,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:20:20,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-14 03:20:20,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:20:20,541 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 03:20:20,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:20:20,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 03:20:20,729 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 03:20:20,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390527652] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:20:20,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [860603656] [2022-12-14 03:20:20,729 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-12-14 03:20:20,730 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:20:20,730 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:20:20,730 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:20:20,730 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:20:20,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:20,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:20:20,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:20:20,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:20:20,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:20:20,844 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 03:20:20,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 76 [2022-12-14 03:20:20,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:20:20,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:20:20,940 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:20:20,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:20:21,669 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:20:27,123 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '37913#(and (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 1 |ULTIMATE.start_cstrncmp_~s1#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#res#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (= |ULTIMATE.start_cstrncmp_~s2#1.offset| |ULTIMATE.start_cstrncmp_#t~pre8#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (= |ULTIMATE.start_cstrncmp_~s2#1.base| |ULTIMATE.start_cstrncmp_#t~pre8#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (= (select |#valid| |ULTIMATE.start_cstrncmp_~s1#1.base|) 1) (<= 0 |ULTIMATE.start_cstrncmp_#t~pre8#1.base|) (<= 0 |ULTIMATE.start_cstrncmp_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrncmp_#in~s2#1.offset| 1) (<= 1 |ULTIMATE.start_cstrstr_~s#1.offset|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= (+ |ULTIMATE.start_cstrncmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrncmp_~s1#1.base|)) (<= 1 |ULTIMATE.start_cstrncmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrncmp_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (<= 0 |ULTIMATE.start_cstrncmp_~s1#1.base|) (= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrstr_~len~0#1|) (= |ULTIMATE.start_cstrncmp_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_cstrncmp_~s1#1.base|) |ULTIMATE.start_cstrncmp_~s1#1.offset|)) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncmp_#in~n#1|) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (not (<= (+ |ULTIMATE.start_cstrncmp_#t~pre8#1.offset| 1) (select |#length| |ULTIMATE.start_cstrncmp_#t~pre8#1.base|))) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= |ULTIMATE.start_cstrstr_~s#1.offset| 1) (<= |ULTIMATE.start_cstrncmp_#in~s1#1.offset| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 03:20:27,123 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:20:27,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:20:27,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 23 [2022-12-14 03:20:27,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201904040] [2022-12-14 03:20:27,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:20:27,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 03:20:27,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:20:27,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 03:20:27,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1997, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 03:20:27,125 INFO L87 Difference]: Start difference. First operand 691 states and 869 transitions. Second operand has 24 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:20:27,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:20:27,672 INFO L93 Difference]: Finished difference Result 1405 states and 1719 transitions. [2022-12-14 03:20:27,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 03:20:27,673 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 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 46 [2022-12-14 03:20:27,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:20:27,675 INFO L225 Difference]: With dead ends: 1405 [2022-12-14 03:20:27,675 INFO L226 Difference]: Without dead ends: 1401 [2022-12-14 03:20:27,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 96 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=574, Invalid=3586, Unknown=0, NotChecked=0, Total=4160 [2022-12-14 03:20:27,675 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 657 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 03:20:27,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [657 Valid, 607 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 03:20:27,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2022-12-14 03:20:27,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 754. [2022-12-14 03:20:27,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 750 states have (on average 1.3093333333333332) internal successors, (982), 753 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:20:27,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 982 transitions. [2022-12-14 03:20:27,683 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 982 transitions. Word has length 46 [2022-12-14 03:20:27,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:20:27,683 INFO L495 AbstractCegarLoop]: Abstraction has 754 states and 982 transitions. [2022-12-14 03:20:27,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:20:27,683 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 982 transitions. [2022-12-14 03:20:27,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 03:20:27,683 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:20:27,683 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:20:27,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-12-14 03:20:27,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-12-14 03:20:27,885 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:20:27,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:20:27,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1983400283, now seen corresponding path program 3 times [2022-12-14 03:20:27,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:20:27,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450302280] [2022-12-14 03:20:27,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:20:27,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:20:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:20:28,043 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 03:20:28,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:20:28,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450302280] [2022-12-14 03:20:28,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450302280] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:20:28,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91310203] [2022-12-14 03:20:28,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 03:20:28,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:20:28,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:20:28,044 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:20:28,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-14 03:20:28,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 03:20:28,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:20:28,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 129 conjunts are in the unsatisfiable core [2022-12-14 03:20:28,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:20:28,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:20:28,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:28,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:20:29,110 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:20:29,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:20:29,695 INFO L321 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2022-12-14 03:20:29,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 251 treesize of output 221 [2022-12-14 03:20:29,705 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:20:29,705 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 153 treesize of output 149 [2022-12-14 03:20:29,766 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 03:20:29,771 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 30 treesize of output 26 [2022-12-14 03:20:29,819 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:20:29,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 131 [2022-12-14 03:20:30,968 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:20:30,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91310203] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:20:30,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2134345602] [2022-12-14 03:20:30,969 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-12-14 03:20:30,969 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:20:30,969 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:20:30,970 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:20:30,970 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:20:30,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:30,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:20:31,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:20:31,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:20:31,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:20:31,087 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 03:20:31,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 76 [2022-12-14 03:20:31,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:20:31,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:20:31,199 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:20:31,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:20:31,933 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:20:38,620 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '40466#(and (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 1 |ULTIMATE.start_cstrncmp_~s1#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrncmp_~s1#1.base|) (+ |ULTIMATE.start_cstrncmp_~s1#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlen_#res#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrncmp_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrncmp_#in~s2#1.offset| 1) (<= 1 |ULTIMATE.start_cstrstr_~s#1.offset|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrncmp_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrncmp_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (<= 0 |ULTIMATE.start_cstrncmp_~s1#1.base|) (= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrstr_~len~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncmp_#in~n#1|) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= |ULTIMATE.start_cstrstr_~s#1.offset| 1) (<= |ULTIMATE.start_cstrncmp_#in~s1#1.offset| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 03:20:38,620 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:20:38,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:20:38,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 23, 24] total 54 [2022-12-14 03:20:38,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166121658] [2022-12-14 03:20:38,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:20:38,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-14 03:20:38,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:20:38,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-14 03:20:38,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=5411, Unknown=0, NotChecked=0, Total=5700 [2022-12-14 03:20:38,621 INFO L87 Difference]: Start difference. First operand 754 states and 982 transitions. Second operand has 54 states, 54 states have (on average 2.425925925925926) internal successors, (131), 54 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:20:43,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:20:43,157 INFO L93 Difference]: Finished difference Result 1260 states and 1542 transitions. [2022-12-14 03:20:43,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-12-14 03:20:43,158 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.425925925925926) internal successors, (131), 54 states have internal predecessors, (131), 0 states have call successors, (0), 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 48 [2022-12-14 03:20:43,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:20:43,159 INFO L225 Difference]: With dead ends: 1260 [2022-12-14 03:20:43,159 INFO L226 Difference]: Without dead ends: 1172 [2022-12-14 03:20:43,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3806 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=1376, Invalid=15136, Unknown=0, NotChecked=0, Total=16512 [2022-12-14 03:20:43,160 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 1286 mSDsluCounter, 1944 mSDsCounter, 0 mSdLazyCounter, 3075 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1286 SdHoareTripleChecker+Valid, 2015 SdHoareTripleChecker+Invalid, 3090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 3075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 03:20:43,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1286 Valid, 2015 Invalid, 3090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 3075 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 03:20:43,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2022-12-14 03:20:43,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 940. [2022-12-14 03:20:43,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 936 states have (on average 1.2863247863247864) internal successors, (1204), 939 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:20:43,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1204 transitions. [2022-12-14 03:20:43,167 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1204 transitions. Word has length 48 [2022-12-14 03:20:43,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:20:43,168 INFO L495 AbstractCegarLoop]: Abstraction has 940 states and 1204 transitions. [2022-12-14 03:20:43,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.425925925925926) internal successors, (131), 54 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:20:43,168 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1204 transitions. [2022-12-14 03:20:43,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 03:20:43,168 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:20:43,168 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:20:43,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-14 03:20:43,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-12-14 03:20:43,369 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:20:43,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:20:43,371 INFO L85 PathProgramCache]: Analyzing trace with hash 345854632, now seen corresponding path program 9 times [2022-12-14 03:20:43,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:20:43,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645432780] [2022-12-14 03:20:43,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:20:43,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:20:43,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:20:44,410 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:20:44,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:20:44,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645432780] [2022-12-14 03:20:44,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645432780] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:20:44,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751569249] [2022-12-14 03:20:44,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 03:20:44,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:20:44,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:20:44,412 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:20:44,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-14 03:20:44,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 03:20:44,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:20:44,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 74 conjunts are in the unsatisfiable core [2022-12-14 03:20:44,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:20:44,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:20:45,482 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 03:20:45,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-12-14 03:20:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 63 proven. 106 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 03:20:45,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:20:45,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-14 03:20:45,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 03:20:46,089 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 63 proven. 106 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 03:20:46,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751569249] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:20:46,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [270127803] [2022-12-14 03:20:46,090 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 03:20:46,090 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:20:46,090 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:20:46,090 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:20:46,090 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:20:46,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:46,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:20:46,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:20:46,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:20:46,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:20:46,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:20:46,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:20:46,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:20:46,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:20:46,365 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:20:46,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:20:46,518 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:20:49,019 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '43136#(and (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= |ULTIMATE.start_cstrstr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~s#1.offset|) (not (<= (+ |ULTIMATE.start_cstrlen_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlen_~s~0#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 03:20:49,019 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:20:49,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:20:49,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22, 22] total 59 [2022-12-14 03:20:49,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209351843] [2022-12-14 03:20:49,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:20:49,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-12-14 03:20:49,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:20:49,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-12-14 03:20:49,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=4498, Unknown=0, NotChecked=0, Total=4692 [2022-12-14 03:20:49,023 INFO L87 Difference]: Start difference. First operand 940 states and 1204 transitions. Second operand has 59 states, 59 states have (on average 1.847457627118644) internal successors, (109), 59 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:21:02,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:21:02,640 INFO L93 Difference]: Finished difference Result 5847 states and 7785 transitions. [2022-12-14 03:21:02,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-12-14 03:21:02,640 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.847457627118644) internal successors, (109), 59 states have internal predecessors, (109), 0 states have call successors, (0), 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 48 [2022-12-14 03:21:02,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:21:02,653 INFO L225 Difference]: With dead ends: 5847 [2022-12-14 03:21:02,653 INFO L226 Difference]: Without dead ends: 5829 [2022-12-14 03:21:02,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 8 DeprecatedPredicates, 3182 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=954, Invalid=14796, Unknown=0, NotChecked=0, Total=15750 [2022-12-14 03:21:02,654 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 5774 mSDsluCounter, 11866 mSDsCounter, 0 mSdLazyCounter, 12695 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5774 SdHoareTripleChecker+Valid, 12185 SdHoareTripleChecker+Invalid, 12725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 12695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:21:02,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5774 Valid, 12185 Invalid, 12725 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [30 Valid, 12695 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-12-14 03:21:02,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5829 states. [2022-12-14 03:21:02,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5829 to 984. [2022-12-14 03:21:02,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 980 states have (on average 1.2826530612244897) internal successors, (1257), 983 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:21:02,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1257 transitions. [2022-12-14 03:21:02,676 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1257 transitions. Word has length 48 [2022-12-14 03:21:02,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:21:02,676 INFO L495 AbstractCegarLoop]: Abstraction has 984 states and 1257 transitions. [2022-12-14 03:21:02,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.847457627118644) internal successors, (109), 59 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:21:02,676 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1257 transitions. [2022-12-14 03:21:02,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 03:21:02,676 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:21:02,676 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:21:02,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-12-14 03:21:02,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:21:02,878 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:21:02,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:21:02,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1088681058, now seen corresponding path program 10 times [2022-12-14 03:21:02,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:21:02,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620727144] [2022-12-14 03:21:02,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:21:02,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:21:02,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:21:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 202 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:21:04,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:21:04,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620727144] [2022-12-14 03:21:04,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620727144] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:21:04,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189063088] [2022-12-14 03:21:04,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 03:21:04,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:21:04,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:21:04,097 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:21:04,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-14 03:21:04,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:21:04,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 82 conjunts are in the unsatisfiable core [2022-12-14 03:21:04,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:21:04,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:21:05,405 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 03:21:05,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-12-14 03:21:05,444 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 56 proven. 137 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 03:21:05,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:21:05,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-14 03:21:05,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 03:21:06,060 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 56 proven. 137 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 03:21:06,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189063088] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:21:06,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1323972907] [2022-12-14 03:21:06,060 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 03:21:06,060 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:21:06,061 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:21:06,061 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:21:06,061 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:21:06,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:21:06,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:21:06,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:21:06,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:21:06,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:21:06,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:21:06,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:21:06,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:21:06,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:21:06,307 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:21:06,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:21:06,468 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:21:09,291 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '50448#(and (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= |ULTIMATE.start_cstrstr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~s#1.offset|) (not (<= (+ |ULTIMATE.start_cstrlen_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlen_~s~0#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 03:21:09,291 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:21:09,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:21:09,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24, 24] total 63 [2022-12-14 03:21:09,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012794666] [2022-12-14 03:21:09,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:21:09,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-12-14 03:21:09,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:21:09,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-12-14 03:21:09,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=5051, Unknown=0, NotChecked=0, Total=5256 [2022-12-14 03:21:09,293 INFO L87 Difference]: Start difference. First operand 984 states and 1257 transitions. Second operand has 63 states, 63 states have (on average 1.8571428571428572) internal successors, (117), 63 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:21:25,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:21:25,219 INFO L93 Difference]: Finished difference Result 7830 states and 10513 transitions. [2022-12-14 03:21:25,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-12-14 03:21:25,220 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.8571428571428572) internal successors, (117), 63 states have internal predecessors, (117), 0 states have call successors, (0), 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 50 [2022-12-14 03:21:25,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:21:25,229 INFO L225 Difference]: With dead ends: 7830 [2022-12-14 03:21:25,229 INFO L226 Difference]: Without dead ends: 7810 [2022-12-14 03:21:25,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 9 DeprecatedPredicates, 4273 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=1150, Invalid=18872, Unknown=0, NotChecked=0, Total=20022 [2022-12-14 03:21:25,230 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 7031 mSDsluCounter, 16952 mSDsCounter, 0 mSdLazyCounter, 17656 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7031 SdHoareTripleChecker+Valid, 17380 SdHoareTripleChecker+Invalid, 17689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 17656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-12-14 03:21:25,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7031 Valid, 17380 Invalid, 17689 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [33 Valid, 17656 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2022-12-14 03:21:25,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7810 states. [2022-12-14 03:21:25,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7810 to 1028. [2022-12-14 03:21:25,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1024 states have (on average 1.279296875) internal successors, (1310), 1027 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:21:25,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1310 transitions. [2022-12-14 03:21:25,256 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1310 transitions. Word has length 50 [2022-12-14 03:21:25,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:21:25,256 INFO L495 AbstractCegarLoop]: Abstraction has 1028 states and 1310 transitions. [2022-12-14 03:21:25,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.8571428571428572) internal successors, (117), 63 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:21:25,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1310 transitions. [2022-12-14 03:21:25,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 03:21:25,257 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:21:25,257 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:21:25,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-12-14 03:21:25,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:21:25,458 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:21:25,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:21:25,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1647954897, now seen corresponding path program 1 times [2022-12-14 03:21:25,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:21:25,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229339769] [2022-12-14 03:21:25,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:21:25,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:21:25,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:21:26,194 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 03:21:26,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:21:26,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229339769] [2022-12-14 03:21:26,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229339769] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:21:26,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920746453] [2022-12-14 03:21:26,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:21:26,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:21:26,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:21:26,195 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:21:26,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-14 03:21:26,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:21:26,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 122 conjunts are in the unsatisfiable core [2022-12-14 03:21:26,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:21:26,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 03:21:26,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:21:26,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 03:21:27,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:21:27,289 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2022-12-14 03:21:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 03:21:27,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:21:27,583 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:21:27,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-12-14 03:21:27,589 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:21:27,589 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 48 treesize of output 43 [2022-12-14 03:21:27,595 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:21:27,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2022-12-14 03:21:27,925 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 03:21:27,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920746453] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:21:27,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [828846229] [2022-12-14 03:21:27,926 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-12-14 03:21:27,926 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:21:27,927 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:21:27,927 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:21:27,927 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:21:27,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:21:27,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:21:27,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:21:27,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:21:28,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:21:28,055 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 03:21:28,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 76 [2022-12-14 03:21:28,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:21:28,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:21:28,153 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:21:28,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:21:29,249 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:21:36,530 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '59813#(and (or (and (<= |ULTIMATE.start_cstrncmp_~s1#1.offset| (select |#length| |ULTIMATE.start_cstrncmp_~s1#1.base|)) (<= 2 |ULTIMATE.start_cstrncmp_~s2#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrncmp_~s1#1.base|) 1) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (not (= (select (select |#memory_int| |ULTIMATE.start_cstrncmp_~s1#1.base|) (+ (- 1) |ULTIMATE.start_cstrncmp_~s1#1.offset|)) 0))) (and (= |ULTIMATE.start_cstrstr_~s#1.offset| |ULTIMATE.start_cstrncmp_#in~s1#1.offset|) (= |ULTIMATE.start_cstrstr_~sc~0#1| |ULTIMATE.start_cstrstr_~c~0#1|) (<= |ULTIMATE.start_cstrstr_~s#1.offset| (select |#length| |ULTIMATE.start_cstrstr_~s#1.base|)) (= |ULTIMATE.start_cstrncmp_#in~s1#1.base| |ULTIMATE.start_cstrstr_~s#1.base|) (= |ULTIMATE.start_cstrstr_~find#1.base| |ULTIMATE.start_cstrncmp_#in~s2#1.base|) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (= |ULTIMATE.start_cstrncmp_~s1#1.offset| |ULTIMATE.start_cstrncmp_#in~s1#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrstr_~s#1.base|) 1) (= |ULTIMATE.start_cstrncmp_#in~n#1| |ULTIMATE.start_cstrncmp_~n#1|) (= |ULTIMATE.start_cstrncmp_~s2#1.base| |ULTIMATE.start_cstrncmp_#in~s2#1.base|) (not (= |ULTIMATE.start_cstrstr_~sc~0#1| 0)) (= |ULTIMATE.start_cstrstr_~sc~0#1| (select (select |#memory_int| |ULTIMATE.start_cstrstr_~s#1.base|) (+ (- 1) |ULTIMATE.start_cstrstr_~s#1.offset|))) (= |ULTIMATE.start_cstrncmp_#in~s1#1.base| |ULTIMATE.start_cstrncmp_~s1#1.base|) (= |ULTIMATE.start_cstrncmp_#in~n#1| |ULTIMATE.start_cstrstr_~len~0#1|))) (or (and (<= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 2 |ULTIMATE.start_cstrncmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 0 |#NULL.base|) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#res#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 2 |ULTIMATE.start_cstrncmp_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrncmp_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrncmp_#in~s2#1.offset| 1) (<= 1 |ULTIMATE.start_cstrstr_~s#1.offset|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrncmp_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrncmp_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (<= 0 |ULTIMATE.start_cstrncmp_~s1#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrstr_~len~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncmp_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|)) (and (<= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 0 |#NULL.base|) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#res#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrncmp_#in~s2#1.offset| 1) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= |ULTIMATE.start_cstrncmp_~s2#1.offset| 1) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncmp_~n#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|))) (not (<= (+ |ULTIMATE.start_cstrncmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrncmp_~s1#1.base|))))' at error location [2022-12-14 03:21:36,530 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:21:36,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:21:36,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 20] total 52 [2022-12-14 03:21:36,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259029177] [2022-12-14 03:21:36,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:21:36,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-14 03:21:36,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:21:36,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-14 03:21:36,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=5388, Unknown=2, NotChecked=0, Total=5700 [2022-12-14 03:21:36,531 INFO L87 Difference]: Start difference. First operand 1028 states and 1310 transitions. Second operand has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 52 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:21:38,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:21:38,133 INFO L93 Difference]: Finished difference Result 1082 states and 1350 transitions. [2022-12-14 03:21:38,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 03:21:38,134 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 52 states have internal predecessors, (109), 0 states have call successors, (0), 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 52 [2022-12-14 03:21:38,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:21:38,136 INFO L225 Difference]: With dead ends: 1082 [2022-12-14 03:21:38,136 INFO L226 Difference]: Without dead ends: 998 [2022-12-14 03:21:38,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 95 SyntacticMatches, 5 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2930 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=604, Invalid=8324, Unknown=2, NotChecked=0, Total=8930 [2022-12-14 03:21:38,137 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 733 mSDsluCounter, 1786 mSDsCounter, 0 mSdLazyCounter, 2202 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 1879 SdHoareTripleChecker+Invalid, 2212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 03:21:38,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [733 Valid, 1879 Invalid, 2212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2202 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 03:21:38,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2022-12-14 03:21:38,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 901. [2022-12-14 03:21:38,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 897 states have (on average 1.2775919732441472) internal successors, (1146), 900 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:21:38,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1146 transitions. [2022-12-14 03:21:38,146 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1146 transitions. Word has length 52 [2022-12-14 03:21:38,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:21:38,146 INFO L495 AbstractCegarLoop]: Abstraction has 901 states and 1146 transitions. [2022-12-14 03:21:38,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 52 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:21:38,146 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1146 transitions. [2022-12-14 03:21:38,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 03:21:38,146 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:21:38,147 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:21:38,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-12-14 03:21:38,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-12-14 03:21:38,348 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:21:38,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:21:38,349 INFO L85 PathProgramCache]: Analyzing trace with hash -992977132, now seen corresponding path program 11 times [2022-12-14 03:21:38,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:21:38,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908494507] [2022-12-14 03:21:38,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:21:38,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:21:38,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:21:39,544 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:21:39,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:21:39,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908494507] [2022-12-14 03:21:39,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908494507] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:21:39,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979668475] [2022-12-14 03:21:39,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 03:21:39,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:21:39,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:21:39,546 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:21:39,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-14 03:21:39,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-12-14 03:21:39,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:21:39,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 92 conjunts are in the unsatisfiable core [2022-12-14 03:21:39,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:21:40,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 03:21:41,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:21:41,146 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:21:41,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-12-14 03:21:41,197 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 45 proven. 172 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 03:21:41,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:21:41,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-14 03:21:41,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 03:21:42,297 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 45 proven. 172 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 03:21:42,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979668475] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:21:42,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1940366668] [2022-12-14 03:21:42,298 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 03:21:42,298 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:21:42,298 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:21:42,298 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:21:42,299 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:21:42,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:21:42,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:21:42,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:21:42,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:21:42,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:21:42,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:21:42,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:21:42,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:21:42,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:21:42,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:21:42,551 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:21:42,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:21:42,809 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:21:46,002 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '62242#(and (<= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= |ULTIMATE.start_cstrstr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~s#1.offset|) (<= 2 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |#NULL.offset|) (not (<= (+ |ULTIMATE.start_cstrlen_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlen_~s~0#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|))' at error location [2022-12-14 03:21:46,002 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:21:46,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:21:46,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26, 26] total 79 [2022-12-14 03:21:46,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533305442] [2022-12-14 03:21:46,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:21:46,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-12-14 03:21:46,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:21:46,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-12-14 03:21:46,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=7736, Unknown=0, NotChecked=0, Total=8010 [2022-12-14 03:21:46,003 INFO L87 Difference]: Start difference. First operand 901 states and 1146 transitions. Second operand has 79 states, 79 states have (on average 1.8734177215189873) internal successors, (148), 79 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:22:06,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:22:06,603 INFO L93 Difference]: Finished difference Result 8441 states and 11505 transitions. [2022-12-14 03:22:06,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-12-14 03:22:06,603 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.8734177215189873) internal successors, (148), 79 states have internal predecessors, (148), 0 states have call successors, (0), 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 52 [2022-12-14 03:22:06,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:22:06,612 INFO L225 Difference]: With dead ends: 8441 [2022-12-14 03:22:06,612 INFO L226 Difference]: Without dead ends: 8419 [2022-12-14 03:22:06,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5608 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=1684, Invalid=28418, Unknown=0, NotChecked=0, Total=30102 [2022-12-14 03:22:06,613 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 11237 mSDsluCounter, 29168 mSDsCounter, 0 mSdLazyCounter, 29576 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11237 SdHoareTripleChecker+Valid, 29721 SdHoareTripleChecker+Invalid, 29614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 29576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:22:06,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11237 Valid, 29721 Invalid, 29614 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [38 Valid, 29576 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time] [2022-12-14 03:22:06,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8419 states. [2022-12-14 03:22:06,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8419 to 945. [2022-12-14 03:22:06,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 941 states have (on average 1.2731137088204039) internal successors, (1198), 944 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:22:06,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1198 transitions. [2022-12-14 03:22:06,642 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1198 transitions. Word has length 52 [2022-12-14 03:22:06,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:22:06,643 INFO L495 AbstractCegarLoop]: Abstraction has 945 states and 1198 transitions. [2022-12-14 03:22:06,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.8734177215189873) internal successors, (148), 79 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:22:06,643 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1198 transitions. [2022-12-14 03:22:06,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 03:22:06,643 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:22:06,643 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:22:06,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-12-14 03:22:06,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:22:06,844 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:22:06,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:22:06,845 INFO L85 PathProgramCache]: Analyzing trace with hash 588978027, now seen corresponding path program 2 times [2022-12-14 03:22:06,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:22:06,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959128539] [2022-12-14 03:22:06,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:22:06,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:22:06,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:22:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 03:22:07,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:22:07,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959128539] [2022-12-14 03:22:07,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959128539] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:22:07,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702258465] [2022-12-14 03:22:07,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 03:22:07,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:22:07,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:22:07,135 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:22:07,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-14 03:22:07,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 03:22:07,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:22:07,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 125 conjunts are in the unsatisfiable core [2022-12-14 03:22:07,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:22:07,332 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 18 treesize of output 16 [2022-12-14 03:22:07,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:22:07,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 03:22:09,097 INFO L321 Elim1Store]: treesize reduction 8, result has 84.9 percent of original size [2022-12-14 03:22:09,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 66 [2022-12-14 03:22:09,249 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 03:22:09,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:22:17,663 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:22:17,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 59 [2022-12-14 03:22:17,714 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:22:17,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 111 treesize of output 178 [2022-12-14 03:22:17,766 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:22:17,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 65 treesize of output 125 [2022-12-14 03:22:19,161 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 42 treesize of output 36 [2022-12-14 03:22:19,296 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 03:22:19,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702258465] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:22:19,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1300741499] [2022-12-14 03:22:19,297 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-12-14 03:22:19,298 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:22:19,298 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:22:19,298 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:22:19,298 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:22:19,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:22:19,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:22:19,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:22:19,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:22:19,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:22:19,419 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 03:22:19,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 76 [2022-12-14 03:22:19,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:22:19,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:22:19,543 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:22:19,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:22:20,604 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:22:28,520 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '72184#(and (or (and (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (= |ULTIMATE.start_cstrstr_~s#1.offset| |ULTIMATE.start_cstrncmp_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#res#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_cstrstr_~sc~0#1| |ULTIMATE.start_cstrstr_~c~0#1|) (<= |ULTIMATE.start_cstrstr_~s#1.offset| (select |#length| |ULTIMATE.start_cstrstr_~s#1.base|)) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (= |ULTIMATE.start_cstrncmp_#in~s1#1.base| |ULTIMATE.start_cstrstr_~s#1.base|) (= |ULTIMATE.start_cstrstr_~find#1.base| |ULTIMATE.start_cstrncmp_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (= |ULTIMATE.start_cstrstr_~find#1.offset| |ULTIMATE.start_cstrncmp_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrstr_~s#1.offset|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (= |ULTIMATE.start_cstrncmp_~s1#1.offset| |ULTIMATE.start_cstrncmp_#in~s1#1.offset|) (= |ULTIMATE.start_cstrncmp_~s2#1.offset| |ULTIMATE.start_cstrncmp_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (= (select |#valid| |ULTIMATE.start_cstrstr_~s#1.base|) 1) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (= |ULTIMATE.start_cstrncmp_#in~n#1| |ULTIMATE.start_cstrncmp_~n#1|) (= |ULTIMATE.start_cstrncmp_~s2#1.base| |ULTIMATE.start_cstrncmp_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (not (= |ULTIMATE.start_cstrstr_~sc~0#1| 0)) (= |ULTIMATE.start_cstrstr_~sc~0#1| (select (select |#memory_int| |ULTIMATE.start_cstrstr_~s#1.base|) (+ (- 1) |ULTIMATE.start_cstrstr_~s#1.offset|))) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrstr_~len~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (= |ULTIMATE.start_cstrncmp_#in~s1#1.base| |ULTIMATE.start_cstrncmp_~s1#1.base|) (= |ULTIMATE.start_cstrncmp_#in~n#1| |ULTIMATE.start_cstrstr_~len~0#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0)) (and (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 2 |ULTIMATE.start_cstrncmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= |ULTIMATE.start_cstrncmp_~s1#1.offset| (select |#length| |ULTIMATE.start_cstrncmp_~s1#1.base|)) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#res#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 2 |ULTIMATE.start_cstrncmp_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (= (select |#valid| |ULTIMATE.start_cstrncmp_~s1#1.base|) 1) (<= 0 |ULTIMATE.start_cstrncmp_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (not (= (select (select |#memory_int| |ULTIMATE.start_cstrncmp_~s1#1.base|) (+ (- 1) |ULTIMATE.start_cstrncmp_~s1#1.offset|)) 0)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrncmp_#in~s2#1.offset| 1) (<= 1 |ULTIMATE.start_cstrstr_~s#1.offset|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrncmp_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrncmp_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (<= 0 |ULTIMATE.start_cstrncmp_~s1#1.base|) (= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrstr_~len~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncmp_#in~n#1|) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))) (not (<= (+ |ULTIMATE.start_cstrncmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrncmp_~s1#1.base|))))' at error location [2022-12-14 03:22:28,520 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:22:28,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:22:28,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21, 22] total 56 [2022-12-14 03:22:28,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378385149] [2022-12-14 03:22:28,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:22:28,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-12-14 03:22:28,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:22:28,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-12-14 03:22:28,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=6081, Unknown=11, NotChecked=0, Total=6480 [2022-12-14 03:22:28,521 INFO L87 Difference]: Start difference. First operand 945 states and 1198 transitions. Second operand has 58 states, 57 states have (on average 2.210526315789474) internal successors, (126), 57 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:23:41,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:23:41,522 INFO L93 Difference]: Finished difference Result 1482 states and 1770 transitions. [2022-12-14 03:23:41,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-12-14 03:23:41,523 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 2.210526315789474) internal successors, (126), 57 states have internal predecessors, (126), 0 states have call successors, (0), 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 54 [2022-12-14 03:23:41,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:23:41,524 INFO L225 Difference]: With dead ends: 1482 [2022-12-14 03:23:41,524 INFO L226 Difference]: Without dead ends: 1042 [2022-12-14 03:23:41,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 89 SyntacticMatches, 5 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14404 ImplicationChecksByTransitivity, 86.9s TimeCoverageRelationStatistics Valid=8021, Invalid=42367, Unknown=12, NotChecked=0, Total=50400 [2022-12-14 03:23:41,527 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 2864 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 3233 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2864 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 3267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 3233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-12-14 03:23:41,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2864 Valid, 1023 Invalid, 3267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 3233 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-12-14 03:23:41,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2022-12-14 03:23:41,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 551. [2022-12-14 03:23:41,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 547 states have (on average 1.2084095063985374) internal successors, (661), 550 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:23:41,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 661 transitions. [2022-12-14 03:23:41,531 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 661 transitions. Word has length 54 [2022-12-14 03:23:41,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:23:41,532 INFO L495 AbstractCegarLoop]: Abstraction has 551 states and 661 transitions. [2022-12-14 03:23:41,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 2.210526315789474) internal successors, (126), 57 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:23:41,532 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 661 transitions. [2022-12-14 03:23:41,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 03:23:41,532 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:23:41,532 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:23:41,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-12-14 03:23:41,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-12-14 03:23:41,733 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:23:41,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:23:41,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1548997975, now seen corresponding path program 4 times [2022-12-14 03:23:41,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:23:41,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944553121] [2022-12-14 03:23:41,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:23:41,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:23:41,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:23:41,964 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 03:23:41,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:23:41,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944553121] [2022-12-14 03:23:41,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944553121] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:23:41,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802467789] [2022-12-14 03:23:41,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 03:23:41,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:23:41,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:23:41,965 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:23:41,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-14 03:23:42,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:23:42,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-14 03:23:42,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:23:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 03:23:42,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:23:42,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 03:23:42,395 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 03:23:42,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802467789] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:23:42,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [764329359] [2022-12-14 03:23:42,395 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-12-14 03:23:42,396 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:23:42,396 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:23:42,396 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:23:42,396 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:23:42,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:23:42,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:23:42,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:23:42,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:23:42,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:23:42,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2022-12-14 03:23:42,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:23:42,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:23:42,586 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:23:42,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:23:43,667 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:23:49,521 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '74868#(and (not (<= (+ |ULTIMATE.start_cstrncmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrncmp_~s1#1.base|))) (or (and (<= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= |ULTIMATE.start_cstrncmp_~s1#1.offset| 1) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_cstrstr_~s#1.offset|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= |ULTIMATE.start_cstrncmp_~s2#1.offset| 1) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncmp_~n#1|) (<= |ULTIMATE.start_cstrncmp_#in~s1#1.offset| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|)) (and (<= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 2 |ULTIMATE.start_cstrncmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 0 |#NULL.base|) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#res#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 2 |ULTIMATE.start_cstrncmp_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrncmp_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrncmp_#in~s2#1.offset| 1) (<= 1 |ULTIMATE.start_cstrstr_~s#1.offset|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrncmp_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrncmp_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (<= 0 |ULTIMATE.start_cstrncmp_~s1#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrstr_~len~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncmp_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.offset|) (<= |ULTIMATE.start_cstrstr_~s#1.offset| 1) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_cstrncmp_#in~s1#1.offset| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|))) (or (and (<= |ULTIMATE.start_cstrncmp_~s1#1.offset| (select |#length| |ULTIMATE.start_cstrncmp_~s1#1.base|)) (<= 2 |ULTIMATE.start_cstrncmp_~s2#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrncmp_~s1#1.base|) 1) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (not (= (select (select |#memory_int| |ULTIMATE.start_cstrncmp_~s1#1.base|) (+ (- 1) |ULTIMATE.start_cstrncmp_~s1#1.offset|)) 0))) (and (= |ULTIMATE.start_cstrstr_~sc~0#1| |ULTIMATE.start_cstrstr_~c~0#1|) (<= |ULTIMATE.start_cstrstr_~s#1.offset| (select |#length| |ULTIMATE.start_cstrstr_~s#1.base|)) (= |ULTIMATE.start_cstrlen_~s~0#1.offset| (+ |ULTIMATE.start_cstrlen_#res#1| |ULTIMATE.start_cstrlen_~str#1.offset|)) (= |ULTIMATE.start_cstrncmp_#in~s1#1.base| |ULTIMATE.start_cstrstr_~s#1.base|) (= |ULTIMATE.start_cstrstr_~find#1.base| |ULTIMATE.start_cstrncmp_#in~s2#1.base|) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (= |ULTIMATE.start_cstrncmp_~s2#1.offset| |ULTIMATE.start_cstrncmp_#in~s2#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrstr_~s#1.base|) 1) (= |ULTIMATE.start_cstrncmp_#in~n#1| |ULTIMATE.start_cstrncmp_~n#1|) (= |ULTIMATE.start_cstrncmp_~s2#1.base| |ULTIMATE.start_cstrncmp_#in~s2#1.base|) (not (= |ULTIMATE.start_cstrstr_~sc~0#1| 0)) (= |ULTIMATE.start_cstrstr_~sc~0#1| (select (select |#memory_int| |ULTIMATE.start_cstrstr_~s#1.base|) (+ (- 1) |ULTIMATE.start_cstrstr_~s#1.offset|))) (= |ULTIMATE.start_cstrncmp_#in~s1#1.base| |ULTIMATE.start_cstrncmp_~s1#1.base|) (= |ULTIMATE.start_cstrncmp_#in~n#1| |ULTIMATE.start_cstrstr_~len~0#1|) (= |ULTIMATE.start_cstrlen_#res#1| |ULTIMATE.start_cstrstr_~len~0#1|))))' at error location [2022-12-14 03:23:49,522 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:23:49,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:23:49,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-12-14 03:23:49,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799747237] [2022-12-14 03:23:49,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:23:49,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 03:23:49,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:23:49,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 03:23:49,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1691, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 03:23:49,522 INFO L87 Difference]: Start difference. First operand 551 states and 661 transitions. Second operand has 22 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:23:50,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:23:50,191 INFO L93 Difference]: Finished difference Result 774 states and 900 transitions. [2022-12-14 03:23:50,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 03:23:50,191 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 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 54 [2022-12-14 03:23:50,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:23:50,192 INFO L225 Difference]: With dead ends: 774 [2022-12-14 03:23:50,192 INFO L226 Difference]: Without dead ends: 774 [2022-12-14 03:23:50,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 125 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=396, Invalid=2910, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 03:23:50,192 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 330 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 03:23:50,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 666 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 03:23:50,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-12-14 03:23:50,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 571. [2022-12-14 03:23:50,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 567 states have (on average 1.2134038800705467) internal successors, (688), 570 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:23:50,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 688 transitions. [2022-12-14 03:23:50,197 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 688 transitions. Word has length 54 [2022-12-14 03:23:50,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:23:50,197 INFO L495 AbstractCegarLoop]: Abstraction has 571 states and 688 transitions. [2022-12-14 03:23:50,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:23:50,197 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 688 transitions. [2022-12-14 03:23:50,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 03:23:50,197 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:23:50,197 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:23:50,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-12-14 03:23:50,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:23:50,399 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:23:50,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:23:50,399 INFO L85 PathProgramCache]: Analyzing trace with hash 784182538, now seen corresponding path program 12 times [2022-12-14 03:23:50,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:23:50,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109147468] [2022-12-14 03:23:50,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:23:50,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:23:50,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:23:51,519 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:23:51,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:23:51,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109147468] [2022-12-14 03:23:51,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109147468] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:23:51,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994821216] [2022-12-14 03:23:51,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 03:23:51,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:23:51,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:23:51,520 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:23:51,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-14 03:23:51,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 03:23:51,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:23:51,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 92 conjunts are in the unsatisfiable core [2022-12-14 03:23:51,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:23:52,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:23:53,407 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 03:23:53,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-12-14 03:23:53,469 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 30 proven. 211 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 03:23:53,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:23:54,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-14 03:23:54,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 03:23:54,274 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 30 proven. 211 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 03:23:54,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994821216] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:23:54,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [44125981] [2022-12-14 03:23:54,275 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 03:23:54,275 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:23:54,275 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:23:54,275 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:23:54,275 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:23:54,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:23:54,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:23:54,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:23:54,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:23:54,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:23:54,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:23:54,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:23:54,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:23:54,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:23:54,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:23:54,547 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:23:54,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:23:54,804 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:23:58,019 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '76652#(and (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= |ULTIMATE.start_cstrstr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~s#1.offset|) (<= 2 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (not (<= (+ |ULTIMATE.start_cstrlen_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlen_~s~0#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 03:23:58,019 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:23:58,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:23:58,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 28] total 71 [2022-12-14 03:23:58,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718603970] [2022-12-14 03:23:58,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:23:58,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-12-14 03:23:58,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:23:58,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-12-14 03:23:58,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=6409, Unknown=0, NotChecked=0, Total=6642 [2022-12-14 03:23:58,020 INFO L87 Difference]: Start difference. First operand 571 states and 688 transitions. Second operand has 71 states, 71 states have (on average 1.8732394366197183) internal successors, (133), 71 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:24:20,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:24:20,415 INFO L93 Difference]: Finished difference Result 4745 states and 6257 transitions. [2022-12-14 03:24:20,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-12-14 03:24:20,415 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.8732394366197183) internal successors, (133), 71 states have internal predecessors, (133), 0 states have call successors, (0), 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 54 [2022-12-14 03:24:20,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:24:20,421 INFO L225 Difference]: With dead ends: 4745 [2022-12-14 03:24:20,422 INFO L226 Difference]: Without dead ends: 4721 [2022-12-14 03:24:20,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 11 DeprecatedPredicates, 6421 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=1458, Invalid=26934, Unknown=0, NotChecked=0, Total=28392 [2022-12-14 03:24:20,423 INFO L413 NwaCegarLoop]: 448 mSDtfsCounter, 7591 mSDsluCounter, 20865 mSDsCounter, 0 mSdLazyCounter, 23387 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7591 SdHoareTripleChecker+Valid, 21313 SdHoareTripleChecker+Invalid, 23426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 23387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2022-12-14 03:24:20,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7591 Valid, 21313 Invalid, 23426 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [39 Valid, 23387 Invalid, 0 Unknown, 0 Unchecked, 11.4s Time] [2022-12-14 03:24:20,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4721 states. [2022-12-14 03:24:20,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4721 to 615. [2022-12-14 03:24:20,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 611 states have (on average 1.2078559738134207) internal successors, (738), 614 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:24:20,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 738 transitions. [2022-12-14 03:24:20,437 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 738 transitions. Word has length 54 [2022-12-14 03:24:20,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:24:20,437 INFO L495 AbstractCegarLoop]: Abstraction has 615 states and 738 transitions. [2022-12-14 03:24:20,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.8732394366197183) internal successors, (133), 71 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:24:20,438 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 738 transitions. [2022-12-14 03:24:20,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 03:24:20,438 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:24:20,438 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:24:20,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-12-14 03:24:20,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-12-14 03:24:20,639 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:24:20,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:24:20,639 INFO L85 PathProgramCache]: Analyzing trace with hash 774299046, now seen corresponding path program 1 times [2022-12-14 03:24:20,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:24:20,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529003535] [2022-12-14 03:24:20,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:24:20,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:24:20,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:24:20,972 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 03:24:20,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:24:20,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529003535] [2022-12-14 03:24:20,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529003535] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:24:20,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692847221] [2022-12-14 03:24:20,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:24:20,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:24:20,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:24:20,973 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:24:20,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-14 03:24:21,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:24:21,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 03:24:21,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:24:21,241 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 03:24:21,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:24:21,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 03:24:21,463 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 03:24:21,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692847221] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:24:21,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [425166684] [2022-12-14 03:24:21,464 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-12-14 03:24:21,464 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:24:21,464 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:24:21,464 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:24:21,464 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:24:21,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:24:21,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:24:21,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:24:21,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:24:21,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:24:21,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2022-12-14 03:24:21,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:24:21,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:24:21,671 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:24:21,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:24:22,557 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:24:27,930 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '82552#(and (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 1 |ULTIMATE.start_cstrncmp_~s1#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#res#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 2 |ULTIMATE.start_cstrncmp_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrncmp_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrncmp_#in~s2#1.offset| 1) (<= 1 |ULTIMATE.start_cstrstr_~s#1.offset|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrncmp_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrncmp_#in~s1#1.base|) (< (select |#length| |ULTIMATE.start_cstrncmp_#t~post5#1.base|) (+ |ULTIMATE.start_cstrncmp_#t~post5#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_cstrncmp_#t~post5#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (<= 0 |ULTIMATE.start_cstrncmp_~s1#1.base|) (= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrstr_~len~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncmp_#in~n#1|) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncmp_#t~post5#1.base|) (= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= |ULTIMATE.start_cstrstr_~s#1.offset| 1) (<= |ULTIMATE.start_cstrncmp_#in~s1#1.offset| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 03:24:27,930 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:24:27,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:24:27,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-12-14 03:24:27,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767815229] [2022-12-14 03:24:27,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:24:27,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 03:24:27,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:24:27,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 03:24:27,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2472, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 03:24:27,931 INFO L87 Difference]: Start difference. First operand 615 states and 738 transitions. Second operand has 31 states, 30 states have (on average 3.3666666666666667) internal successors, (101), 31 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) [2022-12-14 03:24:28,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:24:28,535 INFO L93 Difference]: Finished difference Result 726 states and 856 transitions. [2022-12-14 03:24:28,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 03:24:28,535 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.3666666666666667) internal successors, (101), 31 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 55 [2022-12-14 03:24:28,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:24:28,536 INFO L225 Difference]: With dead ends: 726 [2022-12-14 03:24:28,536 INFO L226 Difference]: Without dead ends: 726 [2022-12-14 03:24:28,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 122 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1422 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=631, Invalid=3791, Unknown=0, NotChecked=0, Total=4422 [2022-12-14 03:24:28,537 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 691 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 03:24:28,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 293 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 03:24:28,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2022-12-14 03:24:28,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 630. [2022-12-14 03:24:28,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 626 states have (on average 1.20926517571885) internal successors, (757), 629 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:24:28,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 757 transitions. [2022-12-14 03:24:28,541 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 757 transitions. Word has length 55 [2022-12-14 03:24:28,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:24:28,541 INFO L495 AbstractCegarLoop]: Abstraction has 630 states and 757 transitions. [2022-12-14 03:24:28,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.3666666666666667) internal successors, (101), 31 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) [2022-12-14 03:24:28,541 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 757 transitions. [2022-12-14 03:24:28,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 03:24:28,542 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:24:28,542 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:24:28,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-12-14 03:24:28,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:24:28,743 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:24:28,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:24:28,744 INFO L85 PathProgramCache]: Analyzing trace with hash 232353427, now seen corresponding path program 3 times [2022-12-14 03:24:28,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:24:28,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260534977] [2022-12-14 03:24:28,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:24:28,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:24:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:24:29,361 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 03:24:29,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:24:29,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260534977] [2022-12-14 03:24:29,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260534977] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:24:29,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827267752] [2022-12-14 03:24:29,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 03:24:29,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:24:29,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:24:29,363 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:24:29,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-14 03:24:29,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 03:24:29,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:24:29,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 102 conjunts are in the unsatisfiable core [2022-12-14 03:24:29,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:24:29,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:24:29,792 INFO L321 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2022-12-14 03:24:29,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-12-14 03:24:30,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:24:30,603 INFO L321 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-12-14 03:24:30,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 25 [2022-12-14 03:24:30,633 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 03:24:30,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:24:33,052 INFO L321 Elim1Store]: treesize reduction 19, result has 53.7 percent of original size [2022-12-14 03:24:33,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 74 [2022-12-14 03:24:33,059 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:24:33,060 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 36 treesize of output 38 [2022-12-14 03:24:33,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 03:24:33,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:24:33,081 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:24:33,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 41 treesize of output 48 [2022-12-14 03:24:33,341 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 03:24:33,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827267752] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:24:33,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1128218901] [2022-12-14 03:24:33,342 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-12-14 03:24:33,342 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:24:33,342 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:24:33,342 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:24:33,342 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:24:33,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:24:33,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:24:33,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:24:33,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:24:33,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:24:33,470 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 03:24:33,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 76 [2022-12-14 03:24:33,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:24:33,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:24:33,578 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:24:33,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:24:34,654 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:24:42,741 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '84338#(and (or (and (<= |ULTIMATE.start_cstrncmp_~s1#1.offset| (select |#length| |ULTIMATE.start_cstrncmp_~s1#1.base|)) (<= 2 |ULTIMATE.start_cstrncmp_~s2#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrncmp_~s1#1.base|) 1) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (not (= (select (select |#memory_int| |ULTIMATE.start_cstrncmp_~s1#1.base|) (+ (- 1) |ULTIMATE.start_cstrncmp_~s1#1.offset|)) 0))) (and (= |ULTIMATE.start_cstrstr_~s#1.offset| |ULTIMATE.start_cstrncmp_#in~s1#1.offset|) (= |ULTIMATE.start_cstrstr_~sc~0#1| |ULTIMATE.start_cstrstr_~c~0#1|) (<= |ULTIMATE.start_cstrstr_~s#1.offset| (select |#length| |ULTIMATE.start_cstrstr_~s#1.base|)) (= |ULTIMATE.start_cstrncmp_#in~s1#1.base| |ULTIMATE.start_cstrstr_~s#1.base|) (= |ULTIMATE.start_cstrstr_~find#1.base| |ULTIMATE.start_cstrncmp_#in~s2#1.base|) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (= |ULTIMATE.start_cstrncmp_~s1#1.offset| |ULTIMATE.start_cstrncmp_#in~s1#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrstr_~s#1.base|) 1) (= |ULTIMATE.start_cstrncmp_#in~n#1| |ULTIMATE.start_cstrncmp_~n#1|) (= |ULTIMATE.start_cstrncmp_~s2#1.base| |ULTIMATE.start_cstrncmp_#in~s2#1.base|) (not (= |ULTIMATE.start_cstrstr_~sc~0#1| 0)) (= |ULTIMATE.start_cstrstr_~sc~0#1| (select (select |#memory_int| |ULTIMATE.start_cstrstr_~s#1.base|) (+ (- 1) |ULTIMATE.start_cstrstr_~s#1.offset|))) (= |ULTIMATE.start_cstrncmp_#in~s1#1.base| |ULTIMATE.start_cstrncmp_~s1#1.base|) (= |ULTIMATE.start_cstrncmp_#in~n#1| |ULTIMATE.start_cstrstr_~len~0#1|))) (or (and (<= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 2 |ULTIMATE.start_cstrncmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 0 |#NULL.base|) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#res#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 2 |ULTIMATE.start_cstrncmp_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrncmp_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrncmp_#in~s2#1.offset| 1) (<= 1 |ULTIMATE.start_cstrstr_~s#1.offset|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrncmp_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrncmp_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (<= 0 |ULTIMATE.start_cstrncmp_~s1#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrstr_~len~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncmp_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|)) (and (<= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 0 |#NULL.base|) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#res#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrncmp_#in~s2#1.offset| 1) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= |ULTIMATE.start_cstrncmp_~s2#1.offset| 1) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncmp_~n#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|))) (not (<= (+ |ULTIMATE.start_cstrncmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrncmp_~s1#1.base|))))' at error location [2022-12-14 03:24:42,741 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:24:42,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:24:42,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 49 [2022-12-14 03:24:42,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123955967] [2022-12-14 03:24:42,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:24:42,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-14 03:24:42,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:24:42,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-14 03:24:42,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=4987, Unknown=0, NotChecked=0, Total=5256 [2022-12-14 03:24:42,742 INFO L87 Difference]: Start difference. First operand 630 states and 757 transitions. Second operand has 50 states, 50 states have (on average 2.54) internal successors, (127), 49 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:24:45,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:24:45,426 INFO L93 Difference]: Finished difference Result 702 states and 827 transitions. [2022-12-14 03:24:45,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 03:24:45,426 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.54) internal successors, (127), 49 states have internal predecessors, (127), 0 states have call successors, (0), 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 56 [2022-12-14 03:24:45,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:24:45,426 INFO L225 Difference]: With dead ends: 702 [2022-12-14 03:24:45,426 INFO L226 Difference]: Without dead ends: 584 [2022-12-14 03:24:45,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 105 SyntacticMatches, 5 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1956 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=635, Invalid=8485, Unknown=0, NotChecked=0, Total=9120 [2022-12-14 03:24:45,427 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 474 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 1627 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 1637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 03:24:45,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 795 Invalid, 1637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1627 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 03:24:45,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-12-14 03:24:45,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 477. [2022-12-14 03:24:45,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 473 states have (on average 1.2177589852008457) internal successors, (576), 476 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:24:45,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 576 transitions. [2022-12-14 03:24:45,430 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 576 transitions. Word has length 56 [2022-12-14 03:24:45,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:24:45,430 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 576 transitions. [2022-12-14 03:24:45,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.54) internal successors, (127), 49 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:24:45,431 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 576 transitions. [2022-12-14 03:24:45,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 03:24:45,431 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:24:45,431 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:24:45,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-12-14 03:24:45,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:24:45,632 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:24:45,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:24:45,632 INFO L85 PathProgramCache]: Analyzing trace with hash -762358400, now seen corresponding path program 13 times [2022-12-14 03:24:45,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:24:45,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502570473] [2022-12-14 03:24:45,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:24:45,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:24:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:24:46,454 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 11 proven. 254 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:24:46,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:24:46,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502570473] [2022-12-14 03:24:46,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502570473] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:24:46,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685896686] [2022-12-14 03:24:46,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 03:24:46,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:24:46,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:24:46,455 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:24:46,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-14 03:24:46,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:24:46,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 100 conjunts are in the unsatisfiable core [2022-12-14 03:24:46,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:24:46,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:24:46,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 03:24:46,995 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 11 proven. 254 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:24:46,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:24:47,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-14 03:24:47,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 03:24:47,206 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 11 proven. 254 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:24:47,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685896686] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:24:47,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [709549050] [2022-12-14 03:24:47,207 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 03:24:47,207 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:24:47,207 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:24:47,207 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:24:47,207 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:24:47,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:24:47,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:24:47,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:24:47,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:24:47,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:24:47,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:24:47,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:24:47,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:24:47,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:24:47,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:24:47,463 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:24:47,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:24:47,726 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:24:50,494 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '85965#(and (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= |ULTIMATE.start_cstrstr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~s#1.offset|) (<= 2 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (not (<= (+ |ULTIMATE.start_cstrlen_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlen_~s~0#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 03:24:50,494 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:24:50,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:24:50,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 49 [2022-12-14 03:24:50,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880109028] [2022-12-14 03:24:50,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:24:50,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-14 03:24:50,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:24:50,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-14 03:24:50,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3365, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 03:24:50,495 INFO L87 Difference]: Start difference. First operand 477 states and 576 transitions. Second operand has 49 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 49 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:24:54,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:24:54,829 INFO L93 Difference]: Finished difference Result 2748 states and 3598 transitions. [2022-12-14 03:24:54,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-14 03:24:54,829 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 49 states have internal predecessors, (91), 0 states have call successors, (0), 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 56 [2022-12-14 03:24:54,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:24:54,831 INFO L225 Difference]: With dead ends: 2748 [2022-12-14 03:24:54,831 INFO L226 Difference]: Without dead ends: 2722 [2022-12-14 03:24:54,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 136 SyntacticMatches, 3 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1824 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=635, Invalid=10495, Unknown=0, NotChecked=0, Total=11130 [2022-12-14 03:24:54,832 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 2867 mSDsluCounter, 11532 mSDsCounter, 0 mSdLazyCounter, 7907 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2867 SdHoareTripleChecker+Valid, 11861 SdHoareTripleChecker+Invalid, 7938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 7907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-14 03:24:54,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2867 Valid, 11861 Invalid, 7938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 7907 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-14 03:24:54,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2722 states. [2022-12-14 03:24:54,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2722 to 507. [2022-12-14 03:24:54,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 503 states have (on average 1.2127236580516898) internal successors, (610), 506 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:24:54,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 610 transitions. [2022-12-14 03:24:54,840 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 610 transitions. Word has length 56 [2022-12-14 03:24:54,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:24:54,840 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 610 transitions. [2022-12-14 03:24:54,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 49 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:24:54,840 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 610 transitions. [2022-12-14 03:24:54,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 03:24:54,841 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:24:54,841 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:24:54,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-12-14 03:24:55,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-12-14 03:24:55,042 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:24:55,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:24:55,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1263686607, now seen corresponding path program 4 times [2022-12-14 03:24:55,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:24:55,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688338421] [2022-12-14 03:24:55,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:24:55,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:24:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:24:56,165 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 12 proven. 41 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 03:24:56,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:24:56,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688338421] [2022-12-14 03:24:56,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688338421] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:24:56,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198895317] [2022-12-14 03:24:56,166 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 03:24:56,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:24:56,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:24:56,167 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:24:56,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-12-14 03:24:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:24:56,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 127 conjunts are in the unsatisfiable core [2022-12-14 03:24:56,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:24:56,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 03:24:56,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:24:56,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 03:24:57,592 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 03:24:57,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2022-12-14 03:24:57,639 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 5 proven. 49 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 03:24:57,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:24:58,251 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int) (v_ArrVal_2202 (Array Int Int))) (let ((.cse0 (select v_ArrVal_2202 (+ |ULTIMATE.start_main_~nondetString2~0#1.offset| 2)))) (or (= .cse0 0) (not (= .cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2202) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))))))) is different from false [2022-12-14 03:24:58,256 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:24:58,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-12-14 03:24:58,261 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:24:58,262 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 48 treesize of output 43 [2022-12-14 03:24:58,267 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:24:58,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2022-12-14 03:24:58,511 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 03:24:58,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198895317] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:24:58,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1488271837] [2022-12-14 03:24:58,512 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-12-14 03:24:58,512 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:24:58,512 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:24:58,512 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:24:58,513 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:24:58,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:24:58,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:24:58,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:24:58,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:24:58,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:24:58,630 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 03:24:58,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 76 [2022-12-14 03:24:58,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:24:58,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:24:58,725 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:24:58,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:24:59,768 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:25:07,165 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '89726#(and (or (and (<= |ULTIMATE.start_cstrncmp_~s1#1.offset| (select |#length| |ULTIMATE.start_cstrncmp_~s1#1.base|)) (<= 2 |ULTIMATE.start_cstrncmp_~s2#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrncmp_~s1#1.base|) 1) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (not (= (select (select |#memory_int| |ULTIMATE.start_cstrncmp_~s1#1.base|) (+ (- 1) |ULTIMATE.start_cstrncmp_~s1#1.offset|)) 0))) (and (= |ULTIMATE.start_cstrstr_~s#1.offset| |ULTIMATE.start_cstrncmp_#in~s1#1.offset|) (= |ULTIMATE.start_cstrstr_~sc~0#1| |ULTIMATE.start_cstrstr_~c~0#1|) (<= |ULTIMATE.start_cstrstr_~s#1.offset| (select |#length| |ULTIMATE.start_cstrstr_~s#1.base|)) (= |ULTIMATE.start_cstrncmp_#in~s1#1.base| |ULTIMATE.start_cstrstr_~s#1.base|) (= |ULTIMATE.start_cstrstr_~find#1.base| |ULTIMATE.start_cstrncmp_#in~s2#1.base|) (not (= (mod |ULTIMATE.start_cstrncmp_~n#1| 4294967296) 0)) (= |ULTIMATE.start_cstrncmp_~s1#1.offset| |ULTIMATE.start_cstrncmp_#in~s1#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrstr_~s#1.base|) 1) (= |ULTIMATE.start_cstrncmp_#in~n#1| |ULTIMATE.start_cstrncmp_~n#1|) (= |ULTIMATE.start_cstrncmp_~s2#1.base| |ULTIMATE.start_cstrncmp_#in~s2#1.base|) (not (= |ULTIMATE.start_cstrstr_~sc~0#1| 0)) (= |ULTIMATE.start_cstrstr_~sc~0#1| (select (select |#memory_int| |ULTIMATE.start_cstrstr_~s#1.base|) (+ (- 1) |ULTIMATE.start_cstrstr_~s#1.offset|))) (= |ULTIMATE.start_cstrncmp_#in~s1#1.base| |ULTIMATE.start_cstrncmp_~s1#1.base|) (= |ULTIMATE.start_cstrncmp_#in~n#1| |ULTIMATE.start_cstrstr_~len~0#1|))) (or (and (<= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 2 |ULTIMATE.start_cstrncmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 0 |#NULL.base|) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#res#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 2 |ULTIMATE.start_cstrncmp_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrncmp_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrncmp_#in~s2#1.offset| 1) (<= 1 |ULTIMATE.start_cstrstr_~s#1.offset|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrncmp_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrncmp_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (<= 0 |ULTIMATE.start_cstrncmp_~s1#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrstr_~len~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncmp_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|)) (and (<= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 0 |#NULL.base|) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#res#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrncmp_#in~s2#1.offset| 1) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= 1 |ULTIMATE.start_cstrncmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= |ULTIMATE.start_cstrncmp_~s2#1.offset| 1) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncmp_~n#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|))) (not (<= (+ |ULTIMATE.start_cstrncmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrncmp_~s1#1.base|))))' at error location [2022-12-14 03:25:07,165 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:25:07,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:25:07,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 21] total 60 [2022-12-14 03:25:07,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812598700] [2022-12-14 03:25:07,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:25:07,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-12-14 03:25:07,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:25:07,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-12-14 03:25:07,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=6516, Unknown=1, NotChecked=162, Total=6972 [2022-12-14 03:25:07,167 INFO L87 Difference]: Start difference. First operand 507 states and 610 transitions. Second operand has 61 states, 61 states have (on average 2.3114754098360657) internal successors, (141), 60 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:25:14,729 WARN L233 SmtUtils]: Spent 6.22s on a formula simplification. DAG size of input: 61 DAG size of output: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 03:25:17,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:25:17,958 INFO L93 Difference]: Finished difference Result 604 states and 698 transitions. [2022-12-14 03:25:17,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-14 03:25:17,958 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.3114754098360657) internal successors, (141), 60 states have internal predecessors, (141), 0 states have call successors, (0), 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 58 [2022-12-14 03:25:17,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:25:17,958 INFO L225 Difference]: With dead ends: 604 [2022-12-14 03:25:17,959 INFO L226 Difference]: Without dead ends: 583 [2022-12-14 03:25:17,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2893 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=775, Invalid=11438, Unknown=1, NotChecked=218, Total=12432 [2022-12-14 03:25:17,960 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 563 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 3496 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 3618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 3496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:25:17,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 1001 Invalid, 3618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 3496 Invalid, 0 Unknown, 113 Unchecked, 2.0s Time] [2022-12-14 03:25:17,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-12-14 03:25:17,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 467. [2022-12-14 03:25:17,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 463 states have (on average 1.1900647948164147) internal successors, (551), 466 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:25:17,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 551 transitions. [2022-12-14 03:25:17,963 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 551 transitions. Word has length 58 [2022-12-14 03:25:17,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:25:17,963 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 551 transitions. [2022-12-14 03:25:17,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.3114754098360657) internal successors, (141), 60 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:25:17,963 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 551 transitions. [2022-12-14 03:25:17,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 03:25:17,964 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:25:17,964 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:25:17,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-12-14 03:25:18,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:25:18,164 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 03:25:18,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:25:18,164 INFO L85 PathProgramCache]: Analyzing trace with hash -929515402, now seen corresponding path program 14 times [2022-12-14 03:25:18,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:25:18,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075807581] [2022-12-14 03:25:18,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:25:18,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:25:18,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:25:18,983 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 132 proven. 158 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:25:18,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:25:18,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075807581] [2022-12-14 03:25:18,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075807581] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:25:18,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316886446] [2022-12-14 03:25:18,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 03:25:18,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:25:18,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:25:18,984 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:25:18,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4ad093f-4fa7-47fb-962d-d23bd116335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-12-14 03:25:19,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-12-14 03:25:19,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:25:19,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 110 conjunts are in the unsatisfiable core [2022-12-14 03:25:19,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:25:19,266 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 03:25:19,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 03:25:19,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:27:32,529 INFO L321 Elim1Store]: treesize reduction 32, result has 89.4 percent of original size [2022-12-14 03:27:32,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 30 case distinctions, treesize of input 92 treesize of output 307 [2022-12-14 03:27:33,259 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-12-14 03:27:33,289 WARN L718 sPolynomialRelations]: Constructing 512(two to the power of 9 dual juncts. [2022-12-14 03:27:33,561 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-14 03:27:33,694 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 45 proven. 130 refuted. 23 times theorem prover too weak. 93 trivial. 0 not checked. [2022-12-14 03:27:33,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:28:00,603 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 141 treesize of output 121 [2022-12-14 03:28:00,867 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 03:28:00,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 30 case distinctions, treesize of input 221 treesize of output 471 [2022-12-14 03:28:00,901 WARN L718 sPolynomialRelations]: Constructing 1024(two to the power of 10 dual juncts. [2022-12-14 03:28:03,042 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 4 proven. 237 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 03:28:03,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316886446] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:28:03,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [432082936] [2022-12-14 03:28:03,043 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 03:28:03,043 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:28:03,043 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:28:03,043 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:28:03,043 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:28:03,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:28:03,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 03:28:03,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:28:03,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:28:03,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:28:03,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:28:03,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:28:03,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:28:03,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 03:28:03,323 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 03:28:03,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 03:28:03,504 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:28:06,896 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '91308#(and (<= |ULTIMATE.start_cstrstr_~find#1.offset| 1) (<= |ULTIMATE.start_cstrstr_#in~find#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~str#1.base|) (<= 1 |ULTIMATE.start_cstrlen_~s~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc23#1.base|) (<= |ULTIMATE.start_cstrlen_~str#1.offset| 1) (<= 1 |ULTIMATE.start_cstrlen_#in~str#1.offset|) (<= 1 |ULTIMATE.start_cstrlen_~str#1.offset|) (<= 0 |ULTIMATE.start_cstrstr_#in~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrstr_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 1 |ULTIMATE.start_cstrstr_~find#1.offset|) (<= |ULTIMATE.start_cstrstr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~find#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrstr_#in~find#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~str#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc22#1.base|) (= |ULTIMATE.start_main_#t~malloc23#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrlen_#in~str#1.offset| 1) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~s#1.base|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc22#1.offset| 0) (<= 0 |ULTIMATE.start_cstrstr_~s#1.offset|) (not (<= (+ |ULTIMATE.start_cstrlen_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlen_~s~0#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 03:28:06,897 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:28:06,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:28:06,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 33] total 89 [2022-12-14 03:28:06,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958648353] [2022-12-14 03:28:06,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:28:06,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-12-14 03:28:06,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:28:06,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-12-14 03:28:06,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=999, Invalid=8863, Unknown=38, NotChecked=0, Total=9900 [2022-12-14 03:28:06,898 INFO L87 Difference]: Start difference. First operand 467 states and 551 transitions. Second operand has 90 states, 89 states have (on average 1.5842696629213484) internal successors, (141), 90 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:28:13,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 03:28:23,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 03:28:24,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 03:28:26,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 03:28:30,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 03:28:32,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 03:28:35,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 03:28:37,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 03:28:39,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 03:28:41,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 03:29:03,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 03:29:05,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 03:29:08,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 03:29:10,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]