./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4f4570e8b350d1c6ecce62e4659f1c324ac9794563382f5f25c3525057748138 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:51:11,619 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:51:11,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:51:11,657 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:51:11,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:51:11,659 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:51:11,660 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:51:11,667 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:51:11,673 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:51:11,681 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:51:11,682 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:51:11,683 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:51:11,683 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:51:11,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:51:11,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:51:11,687 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:51:11,688 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:51:11,689 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:51:11,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:51:11,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:51:11,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:51:11,705 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:51:11,710 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:51:11,711 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:51:11,728 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:51:11,729 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:51:11,729 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:51:11,730 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:51:11,731 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:51:11,732 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:51:11,733 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:51:11,734 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:51:11,735 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:51:11,736 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:51:11,737 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:51:11,737 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:51:11,742 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:51:11,743 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:51:11,744 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:51:11,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:51:11,750 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:51:11,751 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-26 00:51:11,804 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:51:11,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:51:11,805 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:51:11,805 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:51:11,806 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:51:11,806 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:51:11,807 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:51:11,807 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:51:11,807 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:51:11,807 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:51:11,808 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:51:11,809 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:51:11,809 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:51:11,809 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:51:11,809 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:51:11,810 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:51:11,810 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:51:11,810 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:51:11,811 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-26 00:51:11,811 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-26 00:51:11,812 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:51:11,812 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:51:11,812 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 00:51:11,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:51:11,813 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:51:11,813 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:51:11,814 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-26 00:51:11,814 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-26 00:51:11,814 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-26 00:51:11,814 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:51:11,815 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 00:51:11,815 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:51:11,815 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:51:11,815 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:51:11,816 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:51:11,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:51:11,816 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:51:11,816 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:51:11,817 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:51:11,817 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:51:11,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:51:11,817 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:51:11,817 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_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f4570e8b350d1c6ecce62e4659f1c324ac9794563382f5f25c3525057748138 [2022-11-26 00:51:12,098 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:51:12,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:51:12,124 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:51:12,126 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:51:12,126 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:51:12,128 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i [2022-11-26 00:51:15,234 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:51:15,516 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:51:15,517 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i [2022-11-26 00:51:15,535 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/data/45601e70e/28a8a36753f54605b7922875b2680d5f/FLAG1fe6b0a0e [2022-11-26 00:51:15,558 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/data/45601e70e/28a8a36753f54605b7922875b2680d5f [2022-11-26 00:51:15,563 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:51:15,566 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:51:15,567 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:51:15,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:51:15,572 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:51:15,573 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:51:15" (1/1) ... [2022-11-26 00:51:15,575 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62df275f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:51:15, skipping insertion in model container [2022-11-26 00:51:15,575 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:51:15" (1/1) ... [2022-11-26 00:51:15,584 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:51:15,649 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:51:15,951 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:51:15,969 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:51:16,042 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:51:16,069 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:51:16,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:51:16 WrapperNode [2022-11-26 00:51:16,070 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:51:16,071 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:51:16,071 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:51:16,072 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:51:16,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:51:16" (1/1) ... [2022-11-26 00:51:16,095 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:51:16" (1/1) ... [2022-11-26 00:51:16,122 INFO L138 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 101 [2022-11-26 00:51:16,122 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:51:16,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:51:16,123 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:51:16,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:51:16,135 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:51:16" (1/1) ... [2022-11-26 00:51:16,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:51:16" (1/1) ... [2022-11-26 00:51:16,141 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:51:16" (1/1) ... [2022-11-26 00:51:16,141 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:51:16" (1/1) ... [2022-11-26 00:51:16,151 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:51:16" (1/1) ... [2022-11-26 00:51:16,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:51:16" (1/1) ... [2022-11-26 00:51:16,170 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:51:16" (1/1) ... [2022-11-26 00:51:16,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:51:16" (1/1) ... [2022-11-26 00:51:16,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:51:16,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:51:16,175 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:51:16,175 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:51:16,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:51:16" (1/1) ... [2022-11-26 00:51:16,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:51:16,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:51:16,223 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:51:16,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:51:16,273 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:51:16,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:51:16,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:51:16,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:51:16,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:51:16,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:51:16,438 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:51:16,441 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:51:16,819 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:51:16,897 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:51:16,897 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-26 00:51:16,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:51:16 BoogieIcfgContainer [2022-11-26 00:51:16,900 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:51:16,902 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:51:16,902 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:51:16,905 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:51:16,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:51:15" (1/3) ... [2022-11-26 00:51:16,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bf012c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:51:16, skipping insertion in model container [2022-11-26 00:51:16,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:51:16" (2/3) ... [2022-11-26 00:51:16,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bf012c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:51:16, skipping insertion in model container [2022-11-26 00:51:16,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:51:16" (3/3) ... [2022-11-26 00:51:16,909 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrpbrk-alloca-2.i [2022-11-26 00:51:16,930 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:51:16,931 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2022-11-26 00:51:17,001 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:51:17,009 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;@7421040d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:51:17,009 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2022-11-26 00:51:17,014 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 38 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:17,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-26 00:51:17,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:51:17,022 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-26 00:51:17,022 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:51:17,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:51:17,029 INFO L85 PathProgramCache]: Analyzing trace with hash 162186, now seen corresponding path program 1 times [2022-11-26 00:51:17,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:51:17,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207731872] [2022-11-26 00:51:17,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:17,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:51:17,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:51:17,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:51:17,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:51:17,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207731872] [2022-11-26 00:51:17,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207731872] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:51:17,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:51:17,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:51:17,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242262668] [2022-11-26 00:51:17,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:51:17,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:51:17,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:51:17,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:51:17,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:51:17,436 INFO L87 Difference]: Start difference. First operand has 39 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 38 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:17,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:51:17,560 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-11-26 00:51:17,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:51:17,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-26 00:51:17,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:51:17,571 INFO L225 Difference]: With dead ends: 37 [2022-11-26 00:51:17,571 INFO L226 Difference]: Without dead ends: 36 [2022-11-26 00:51:17,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:51:17,579 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:51:17,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 18 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:51:17,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-26 00:51:17,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-26 00:51:17,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:17,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-11-26 00:51:17,619 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 3 [2022-11-26 00:51:17,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:51:17,620 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-11-26 00:51:17,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:17,620 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-11-26 00:51:17,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-26 00:51:17,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:51:17,621 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-26 00:51:17,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:51:17,621 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:51:17,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:51:17,622 INFO L85 PathProgramCache]: Analyzing trace with hash 162187, now seen corresponding path program 1 times [2022-11-26 00:51:17,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:51:17,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17289679] [2022-11-26 00:51:17,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:17,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:51:17,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:51:17,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:51:17,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:51:17,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17289679] [2022-11-26 00:51:17,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17289679] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:51:17,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:51:17,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:51:17,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491357456] [2022-11-26 00:51:17,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:51:17,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:51:17,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:51:17,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:51:17,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:51:17,968 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:18,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:51:18,131 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2022-11-26 00:51:18,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:51:18,131 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-26 00:51:18,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:51:18,133 INFO L225 Difference]: With dead ends: 70 [2022-11-26 00:51:18,133 INFO L226 Difference]: Without dead ends: 70 [2022-11-26 00:51:18,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:51:18,135 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 38 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:51:18,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 55 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:51:18,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-26 00:51:18,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 38. [2022-11-26 00:51:18,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 37 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:18,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-11-26 00:51:18,142 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 3 [2022-11-26 00:51:18,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:51:18,142 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-11-26 00:51:18,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:18,142 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-11-26 00:51:18,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-26 00:51:18,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:51:18,143 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-26 00:51:18,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:51:18,144 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:51:18,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:51:18,144 INFO L85 PathProgramCache]: Analyzing trace with hash 5136908, now seen corresponding path program 1 times [2022-11-26 00:51:18,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:51:18,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283412469] [2022-11-26 00:51:18,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:18,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:51:18,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:51:18,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:51:18,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:51:18,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283412469] [2022-11-26 00:51:18,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283412469] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:51:18,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:51:18,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:51:18,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306542144] [2022-11-26 00:51:18,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:51:18,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:51:18,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:51:18,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:51:18,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:51:18,422 INFO L87 Difference]: Start difference. First operand 38 states and 44 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) [2022-11-26 00:51:18,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:51:18,465 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-11-26 00:51:18,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:51:18,466 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 [2022-11-26 00:51:18,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:51:18,466 INFO L225 Difference]: With dead ends: 37 [2022-11-26 00:51:18,467 INFO L226 Difference]: Without dead ends: 37 [2022-11-26 00:51:18,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:51:18,468 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:51:18,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 18 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:51:18,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-26 00:51:18,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-26 00:51:18,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:18,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-11-26 00:51:18,474 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 4 [2022-11-26 00:51:18,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:51:18,474 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-11-26 00:51:18,475 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) [2022-11-26 00:51:18,475 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-11-26 00:51:18,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-26 00:51:18,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:51:18,476 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-26 00:51:18,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:51:18,476 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:51:18,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:51:18,477 INFO L85 PathProgramCache]: Analyzing trace with hash 5134015, now seen corresponding path program 1 times [2022-11-26 00:51:18,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:51:18,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309903517] [2022-11-26 00:51:18,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:18,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:51:18,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:51:18,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:51:18,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:51:18,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309903517] [2022-11-26 00:51:18,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309903517] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:51:18,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:51:18,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:51:18,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508879132] [2022-11-26 00:51:18,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:51:18,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:51:18,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:51:18,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:51:18,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:51:18,520 INFO L87 Difference]: Start difference. First operand 37 states and 43 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) [2022-11-26 00:51:18,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:51:18,572 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-11-26 00:51:18,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:51:18,572 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 [2022-11-26 00:51:18,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:51:18,574 INFO L225 Difference]: With dead ends: 35 [2022-11-26 00:51:18,574 INFO L226 Difference]: Without dead ends: 35 [2022-11-26 00:51:18,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:51:18,577 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:51:18,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 17 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:51:18,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-26 00:51:18,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-26 00:51:18,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:18,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-11-26 00:51:18,589 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 4 [2022-11-26 00:51:18,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:51:18,589 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-11-26 00:51:18,590 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) [2022-11-26 00:51:18,590 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-11-26 00:51:18,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-26 00:51:18,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:51:18,590 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-26 00:51:18,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:51:18,591 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:51:18,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:51:18,593 INFO L85 PathProgramCache]: Analyzing trace with hash 5134016, now seen corresponding path program 1 times [2022-11-26 00:51:18,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:51:18,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132216669] [2022-11-26 00:51:18,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:18,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:51:18,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:51:18,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:51:18,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:51:18,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132216669] [2022-11-26 00:51:18,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132216669] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:51:18,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:51:18,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:51:18,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158137068] [2022-11-26 00:51:18,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:51:18,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:51:18,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:51:18,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:51:18,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:51:18,862 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:19,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:51:19,037 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2022-11-26 00:51:19,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:51:19,037 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-26 00:51:19,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:51:19,038 INFO L225 Difference]: With dead ends: 63 [2022-11-26 00:51:19,039 INFO L226 Difference]: Without dead ends: 63 [2022-11-26 00:51:19,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:51:19,041 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 68 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:51:19,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 48 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:51:19,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-26 00:51:19,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 37. [2022-11-26 00:51:19,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:19,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2022-11-26 00:51:19,046 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 4 [2022-11-26 00:51:19,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:51:19,046 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2022-11-26 00:51:19,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:19,047 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-11-26 00:51:19,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-26 00:51:19,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:51:19,048 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-26 00:51:19,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 00:51:19,048 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:51:19,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:51:19,049 INFO L85 PathProgramCache]: Analyzing trace with hash 159244142, now seen corresponding path program 1 times [2022-11-26 00:51:19,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:51:19,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63457018] [2022-11-26 00:51:19,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:19,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:51:19,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:51:19,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:51:19,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:51:19,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63457018] [2022-11-26 00:51:19,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63457018] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:51:19,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:51:19,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:51:19,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637005256] [2022-11-26 00:51:19,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:51:19,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:51:19,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:51:19,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:51:19,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:51:19,375 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:19,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:51:19,508 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2022-11-26 00:51:19,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:51:19,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-26 00:51:19,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:51:19,514 INFO L225 Difference]: With dead ends: 62 [2022-11-26 00:51:19,515 INFO L226 Difference]: Without dead ends: 62 [2022-11-26 00:51:19,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:51:19,524 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 65 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:51:19,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 48 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:51:19,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-26 00:51:19,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 39. [2022-11-26 00:51:19,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.84) internal successors, (46), 38 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:19,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-11-26 00:51:19,546 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 5 [2022-11-26 00:51:19,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:51:19,546 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-11-26 00:51:19,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:19,547 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-11-26 00:51:19,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-26 00:51:19,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:51:19,548 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2022-11-26 00:51:19,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 00:51:19,549 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:51:19,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:51:19,553 INFO L85 PathProgramCache]: Analyzing trace with hash 155961429, now seen corresponding path program 1 times [2022-11-26 00:51:19,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:51:19,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497431079] [2022-11-26 00:51:19,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:19,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:51:19,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:51:19,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:51:19,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:51:19,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497431079] [2022-11-26 00:51:19,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497431079] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:51:19,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496895928] [2022-11-26 00:51:19,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:19,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:51:19,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:51:19,822 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:51:19,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:51:19,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:51:19,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:51:19,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:51:20,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:20,012 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 [2022-11-26 00:51:20,023 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 [2022-11-26 00:51:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:51:20,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:51:20,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:51:20,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496895928] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:51:20,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1154622837] [2022-11-26 00:51:20,394 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-11-26 00:51:20,395 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:51:20,399 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:51:20,405 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:51:20,406 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:51:20,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:20,479 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 [2022-11-26 00:51:20,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:51:20,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:51:20,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:51:20,773 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:51:21,177 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '630#(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_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 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|) (<= |ULTIMATE.start_main_#t~nondet15#1| 127) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet15#1|)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-26 00:51:21,178 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:51:21,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:51:21,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-11-26 00:51:21,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497913572] [2022-11-26 00:51:21,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:51:21,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-26 00:51:21,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:51:21,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-26 00:51:21,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:51:21,180 INFO L87 Difference]: Start difference. First operand 39 states and 46 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) [2022-11-26 00:51:21,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:51:21,623 INFO L93 Difference]: Finished difference Result 105 states and 123 transitions. [2022-11-26 00:51:21,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:51:21,624 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 [2022-11-26 00:51:21,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:51:21,625 INFO L225 Difference]: With dead ends: 105 [2022-11-26 00:51:21,625 INFO L226 Difference]: Without dead ends: 105 [2022-11-26 00:51:21,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-11-26 00:51:21,626 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 171 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:51:21,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 224 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:51:21,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-26 00:51:21,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 36. [2022-11-26 00:51:21,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.826086956521739) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:21,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-11-26 00:51:21,632 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 5 [2022-11-26 00:51:21,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:51:21,633 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-11-26 00:51:21,633 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) [2022-11-26 00:51:21,633 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-11-26 00:51:21,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:51:21,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:51:21,634 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 00:51:21,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:51:21,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:51:21,840 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:51:21,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:51:21,840 INFO L85 PathProgramCache]: Analyzing trace with hash 641603338, now seen corresponding path program 1 times [2022-11-26 00:51:21,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:51:21,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666205800] [2022-11-26 00:51:21,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:21,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:51:21,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:51:21,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:51:21,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:51:21,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666205800] [2022-11-26 00:51:21,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666205800] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:51:21,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:51:21,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:51:21,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365810782] [2022-11-26 00:51:21,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:51:21,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:51:21,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:51:21,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:51:21,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:51:21,889 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:21,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:51:21,956 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-11-26 00:51:21,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:51:21,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 00:51:21,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:51:21,957 INFO L225 Difference]: With dead ends: 34 [2022-11-26 00:51:21,957 INFO L226 Difference]: Without dead ends: 34 [2022-11-26 00:51:21,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:51:21,959 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 52 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:51:21,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 19 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:51:21,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-26 00:51:21,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-11-26 00:51:21,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:21,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-11-26 00:51:21,965 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 6 [2022-11-26 00:51:21,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:51:21,966 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-11-26 00:51:21,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:21,966 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-11-26 00:51:21,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:51:21,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:51:21,967 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 00:51:21,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 00:51:21,967 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:51:21,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:51:21,968 INFO L85 PathProgramCache]: Analyzing trace with hash 641603339, now seen corresponding path program 1 times [2022-11-26 00:51:21,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:51:21,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482410198] [2022-11-26 00:51:21,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:21,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:51:21,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:51:22,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:51:22,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:51:22,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482410198] [2022-11-26 00:51:22,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482410198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:51:22,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:51:22,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:51:22,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481255750] [2022-11-26 00:51:22,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:51:22,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:51:22,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:51:22,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:51:22,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:51:22,059 INFO L87 Difference]: Start difference. First operand 34 states and 40 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) [2022-11-26 00:51:22,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:51:22,140 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2022-11-26 00:51:22,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:51:22,141 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 [2022-11-26 00:51:22,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:51:22,141 INFO L225 Difference]: With dead ends: 53 [2022-11-26 00:51:22,142 INFO L226 Difference]: Without dead ends: 53 [2022-11-26 00:51:22,142 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 [2022-11-26 00:51:22,143 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 129 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:51:22,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 28 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:51:22,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-26 00:51:22,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 37. [2022-11-26 00:51:22,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:22,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2022-11-26 00:51:22,147 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 6 [2022-11-26 00:51:22,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:51:22,147 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2022-11-26 00:51:22,147 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) [2022-11-26 00:51:22,148 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-11-26 00:51:22,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:51:22,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:51:22,148 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-26 00:51:22,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 00:51:22,149 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:51:22,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:51:22,149 INFO L85 PathProgramCache]: Analyzing trace with hash 638899314, now seen corresponding path program 1 times [2022-11-26 00:51:22,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:51:22,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264040181] [2022-11-26 00:51:22,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:22,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:51:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:51:22,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:51:22,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:51:22,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264040181] [2022-11-26 00:51:22,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264040181] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:51:22,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830887253] [2022-11-26 00:51:22,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:22,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:51:22,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:51:22,385 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:51:22,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:51:22,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:51:22,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:51:22,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:51:22,497 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-26 00:51:22,497 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 [2022-11-26 00:51:22,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:51:22,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:51:22,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:51:22,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830887253] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:51:22,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [725186461] [2022-11-26 00:51:22,888 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-26 00:51:22,888 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:51:22,888 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:51:22,889 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:51:22,889 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:51:22,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:22,931 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 [2022-11-26 00:51:23,010 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 [2022-11-26 00:51:23,085 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 [2022-11-26 00:51:23,115 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:51:23,860 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '995#(and (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet17#1|)) (not (<= (+ |ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~i~1#1| 1) (select |#length| |ULTIMATE.start_main_~nondetString2~0#1.base|))) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= |ULTIMATE.start_main_#t~nondet17#1| 127) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (< (+ |ULTIMATE.start_main_~i~1#1| 1) |ULTIMATE.start_main_~length2~0#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-26 00:51:23,861 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:51:23,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:51:23,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2022-11-26 00:51:23,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646945244] [2022-11-26 00:51:23,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:51:23,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-26 00:51:23,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:51:23,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-26 00:51:23,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-11-26 00:51:23,863 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:24,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:51:24,216 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2022-11-26 00:51:24,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:51:24,217 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 00:51:24,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:51:24,217 INFO L225 Difference]: With dead ends: 86 [2022-11-26 00:51:24,218 INFO L226 Difference]: Without dead ends: 86 [2022-11-26 00:51:24,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2022-11-26 00:51:24,219 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 222 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:51:24,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 149 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:51:24,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-26 00:51:24,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 31. [2022-11-26 00:51:24,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:24,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-11-26 00:51:24,222 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 6 [2022-11-26 00:51:24,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:51:24,223 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-11-26 00:51:24,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:24,223 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-11-26 00:51:24,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 00:51:24,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:51:24,224 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:51:24,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:51:24,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 00:51:24,429 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:51:24,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:51:24,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1400614513, now seen corresponding path program 1 times [2022-11-26 00:51:24,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:51:24,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705415878] [2022-11-26 00:51:24,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:24,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:51:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:51:24,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:51:24,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:51:24,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705415878] [2022-11-26 00:51:24,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705415878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:51:24,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:51:24,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:51:24,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056420429] [2022-11-26 00:51:24,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:51:24,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:51:24,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:51:24,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:51:24,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:51:24,513 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:24,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:51:24,578 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2022-11-26 00:51:24,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:51:24,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-26 00:51:24,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:51:24,580 INFO L225 Difference]: With dead ends: 30 [2022-11-26 00:51:24,580 INFO L226 Difference]: Without dead ends: 30 [2022-11-26 00:51:24,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:51:24,581 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 34 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:51:24,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 20 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:51:24,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-26 00:51:24,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-11-26 00:51:24,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:24,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-11-26 00:51:24,594 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 9 [2022-11-26 00:51:24,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:51:24,594 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-11-26 00:51:24,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:24,595 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-11-26 00:51:24,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 00:51:24,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:51:24,596 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:51:24,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-26 00:51:24,596 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:51:24,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:51:24,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1400614514, now seen corresponding path program 1 times [2022-11-26 00:51:24,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:51:24,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060772805] [2022-11-26 00:51:24,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:24,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:51:24,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:51:24,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:51:24,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:51:24,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060772805] [2022-11-26 00:51:24,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060772805] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:51:24,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:51:24,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:51:24,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520028197] [2022-11-26 00:51:24,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:51:24,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:51:24,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:51:24,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:51:24,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:51:24,774 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:24,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:51:24,888 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2022-11-26 00:51:24,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:51:24,888 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-26 00:51:24,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:51:24,889 INFO L225 Difference]: With dead ends: 41 [2022-11-26 00:51:24,889 INFO L226 Difference]: Without dead ends: 41 [2022-11-26 00:51:24,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:51:24,890 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 81 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:51:24,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 23 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:51:24,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-26 00:51:24,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2022-11-26 00:51:24,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:24,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2022-11-26 00:51:24,892 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 9 [2022-11-26 00:51:24,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:51:24,892 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2022-11-26 00:51:24,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:24,893 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2022-11-26 00:51:24,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 00:51:24,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:51:24,893 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:51:24,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-26 00:51:24,893 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:51:24,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:51:24,894 INFO L85 PathProgramCache]: Analyzing trace with hash 469310905, now seen corresponding path program 1 times [2022-11-26 00:51:24,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:51:24,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569808209] [2022-11-26 00:51:24,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:24,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:51:24,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:51:25,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:51:25,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:51:25,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569808209] [2022-11-26 00:51:25,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569808209] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:51:25,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:51:25,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:51:25,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712723743] [2022-11-26 00:51:25,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:51:25,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:51:25,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:51:25,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:51:25,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:51:25,025 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 5 states, 4 states have (on average 2.5) 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) [2022-11-26 00:51:25,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:51:25,059 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2022-11-26 00:51:25,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:51:25,060 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) 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 [2022-11-26 00:51:25,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:51:25,060 INFO L225 Difference]: With dead ends: 32 [2022-11-26 00:51:25,060 INFO L226 Difference]: Without dead ends: 29 [2022-11-26 00:51:25,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:51:25,061 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 22 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:51:25,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 30 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:51:25,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-26 00:51:25,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-26 00:51:25,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:25,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-11-26 00:51:25,064 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 10 [2022-11-26 00:51:25,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:51:25,064 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-11-26 00:51:25,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) 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) [2022-11-26 00:51:25,064 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-11-26 00:51:25,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 00:51:25,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:51:25,065 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:51:25,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-26 00:51:25,065 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:51:25,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:51:25,066 INFO L85 PathProgramCache]: Analyzing trace with hash 101075500, now seen corresponding path program 1 times [2022-11-26 00:51:25,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:51:25,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357479372] [2022-11-26 00:51:25,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:25,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:51:25,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:51:25,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:51:25,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:51:25,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357479372] [2022-11-26 00:51:25,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357479372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:51:25,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:51:25,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:51:25,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436199428] [2022-11-26 00:51:25,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:51:25,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:51:25,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:51:25,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:51:25,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:51:25,090 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:25,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:51:25,111 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2022-11-26 00:51:25,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:51:25,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-26 00:51:25,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:51:25,112 INFO L225 Difference]: With dead ends: 31 [2022-11-26 00:51:25,112 INFO L226 Difference]: Without dead ends: 31 [2022-11-26 00:51:25,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:51:25,113 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:51:25,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:51:25,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-26 00:51:25,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-26 00:51:25,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:25,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-11-26 00:51:25,116 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 12 [2022-11-26 00:51:25,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:51:25,116 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-11-26 00:51:25,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:25,116 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-11-26 00:51:25,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:51:25,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:51:25,117 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:51:25,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-26 00:51:25,118 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:51:25,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:51:25,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1161774215, now seen corresponding path program 1 times [2022-11-26 00:51:25,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:51:25,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521938544] [2022-11-26 00:51:25,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:25,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:51:25,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:51:25,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:51:25,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:51:25,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521938544] [2022-11-26 00:51:25,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521938544] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:51:25,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:51:25,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:51:25,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914569365] [2022-11-26 00:51:25,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:51:25,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:51:25,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:51:25,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:51:25,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:51:25,457 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:25,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:51:25,597 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2022-11-26 00:51:25,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:51:25,598 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-26 00:51:25,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:51:25,599 INFO L225 Difference]: With dead ends: 39 [2022-11-26 00:51:25,599 INFO L226 Difference]: Without dead ends: 33 [2022-11-26 00:51:25,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:51:25,600 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:51:25,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 69 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:51:25,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-26 00:51:25,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-11-26 00:51:25,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 31 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) [2022-11-26 00:51:25,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-11-26 00:51:25,602 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 13 [2022-11-26 00:51:25,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:51:25,602 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-11-26 00:51:25,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:25,603 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-11-26 00:51:25,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 00:51:25,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:51:25,603 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:51:25,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-26 00:51:25,604 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:51:25,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:51:25,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1481271869, now seen corresponding path program 1 times [2022-11-26 00:51:25,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:51:25,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531464047] [2022-11-26 00:51:25,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:25,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:51:25,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:51:25,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:51:25,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:51:25,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531464047] [2022-11-26 00:51:25,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531464047] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:51:25,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:51:25,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-26 00:51:25,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224915285] [2022-11-26 00:51:25,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:51:25,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:51:25,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:51:25,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:51:25,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:51:25,976 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:26,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:51:26,147 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-11-26 00:51:26,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:51:26,148 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 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 15 [2022-11-26 00:51:26,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:51:26,148 INFO L225 Difference]: With dead ends: 49 [2022-11-26 00:51:26,148 INFO L226 Difference]: Without dead ends: 49 [2022-11-26 00:51:26,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:51:26,149 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 65 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:51:26,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 56 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:51:26,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-26 00:51:26,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2022-11-26 00:51:26,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:26,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2022-11-26 00:51:26,152 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 15 [2022-11-26 00:51:26,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:51:26,152 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2022-11-26 00:51:26,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:26,152 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2022-11-26 00:51:26,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-26 00:51:26,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:51:26,153 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:51:26,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-26 00:51:26,153 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:51:26,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:51:26,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1329745851, now seen corresponding path program 1 times [2022-11-26 00:51:26,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:51:26,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347460138] [2022-11-26 00:51:26,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:26,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:51:26,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:51:26,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:51:26,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:51:26,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347460138] [2022-11-26 00:51:26,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347460138] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:51:26,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:51:26,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 00:51:26,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753500914] [2022-11-26 00:51:26,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:51:26,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:51:26,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:51:26,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:51:26,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:51:26,266 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:26,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:51:26,406 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2022-11-26 00:51:26,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 00:51:26,407 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-26 00:51:26,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:51:26,407 INFO L225 Difference]: With dead ends: 47 [2022-11-26 00:51:26,407 INFO L226 Difference]: Without dead ends: 34 [2022-11-26 00:51:26,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:51:26,408 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 37 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:51:26,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 36 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:51:26,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-26 00:51:26,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-11-26 00:51:26,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:26,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-11-26 00:51:26,410 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 16 [2022-11-26 00:51:26,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:51:26,411 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-11-26 00:51:26,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:26,411 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-11-26 00:51:26,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-26 00:51:26,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:51:26,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:51:26,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-26 00:51:26,412 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:51:26,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:51:26,412 INFO L85 PathProgramCache]: Analyzing trace with hash -298912303, now seen corresponding path program 1 times [2022-11-26 00:51:26,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:51:26,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136369103] [2022-11-26 00:51:26,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:26,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:51:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:51:26,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:51:26,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:51:26,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136369103] [2022-11-26 00:51:26,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136369103] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:51:26,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036412030] [2022-11-26 00:51:26,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:26,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:51:26,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:51:26,793 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:51:26,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:51:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:51:26,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 00:51:26,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:51:27,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:51:27,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:51:27,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:51:27,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:51:27,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036412030] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:51:27,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [26575608] [2022-11-26 00:51:27,148 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:51:27,148 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:51:27,149 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:51:27,149 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:51:27,149 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:51:27,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:27,197 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 [2022-11-26 00:51:27,268 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 [2022-11-26 00:51:27,323 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 [2022-11-26 00:51:27,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:51:27,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:51:27,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:51:27,572 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 [2022-11-26 00:51:27,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:51:27,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:51:27,725 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-26 00:51:27,726 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 [2022-11-26 00:51:28,094 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:51:30,932 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1807#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~s~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:51:30,933 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:51:30,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:51:30,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-11-26 00:51:30,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721835122] [2022-11-26 00:51:30,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:51:30,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-26 00:51:30,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:51:30,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-26 00:51:30,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2022-11-26 00:51:30,935 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:31,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:51:31,240 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2022-11-26 00:51:31,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 00:51:31,240 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-26 00:51:31,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:51:31,241 INFO L225 Difference]: With dead ends: 47 [2022-11-26 00:51:31,241 INFO L226 Difference]: Without dead ends: 43 [2022-11-26 00:51:31,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=202, Invalid=1130, Unknown=0, NotChecked=0, Total=1332 [2022-11-26 00:51:31,242 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 249 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:51:31,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 28 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:51:31,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-26 00:51:31,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2022-11-26 00:51:31,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:31,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-11-26 00:51:31,245 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 17 [2022-11-26 00:51:31,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:51:31,245 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-11-26 00:51:31,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:31,246 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-11-26 00:51:31,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-26 00:51:31,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:51:31,247 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:51:31,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:51:31,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-26 00:51:31,453 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:51:31,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:51:31,453 INFO L85 PathProgramCache]: Analyzing trace with hash 508049194, now seen corresponding path program 1 times [2022-11-26 00:51:31,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:51:31,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525331705] [2022-11-26 00:51:31,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:31,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:51:31,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:51:31,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:51:31,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:51:31,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525331705] [2022-11-26 00:51:31,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525331705] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:51:31,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23930945] [2022-11-26 00:51:31,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:31,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:51:31,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:51:31,676 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:51:31,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:51:31,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:51:31,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 00:51:31,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:51:31,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:51:31,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:51:32,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:51:32,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:51:32,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23930945] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:51:32,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [34169175] [2022-11-26 00:51:32,069 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 00:51:32,069 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:51:32,070 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:51:32,070 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:51:32,070 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:51:32,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:32,113 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 [2022-11-26 00:51:32,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:51:32,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:51:32,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:51:32,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:51:32,415 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:51:32,415 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 90 treesize of output 89 [2022-11-26 00:51:32,492 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 [2022-11-26 00:51:32,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:51:32,666 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-11-26 00:51:32,666 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 177 treesize of output 181 [2022-11-26 00:51:32,891 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-11-26 00:51:32,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-11-26 00:51:35,647 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:51:39,533 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2032#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:51:39,534 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:51:39,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:51:39,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-11-26 00:51:39,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259705532] [2022-11-26 00:51:39,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:51:39,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-26 00:51:39,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:51:39,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-26 00:51:39,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2022-11-26 00:51:39,537 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 17 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:39,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:51:39,746 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2022-11-26 00:51:39,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:51:39,746 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 16 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 19 [2022-11-26 00:51:39,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:51:39,747 INFO L225 Difference]: With dead ends: 56 [2022-11-26 00:51:39,747 INFO L226 Difference]: Without dead ends: 56 [2022-11-26 00:51:39,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2022-11-26 00:51:39,749 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 177 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:51:39,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 45 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:51:39,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-26 00:51:39,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 40. [2022-11-26 00:51:39,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.236842105263158) internal successors, (47), 39 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:39,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2022-11-26 00:51:39,752 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 19 [2022-11-26 00:51:39,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:51:39,753 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2022-11-26 00:51:39,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:39,753 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2022-11-26 00:51:39,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-26 00:51:39,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:51:39,754 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:51:39,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:51:39,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:51:39,962 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:51:39,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:51:39,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1313653928, now seen corresponding path program 2 times [2022-11-26 00:51:39,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:51:39,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993444644] [2022-11-26 00:51:39,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:39,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:51:39,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:51:40,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:51:40,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:51:40,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993444644] [2022-11-26 00:51:40,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993444644] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:51:40,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976516718] [2022-11-26 00:51:40,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:51:40,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:51:40,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:51:40,414 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:51:40,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:51:40,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:51:40,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:51:40,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-26 00:51:40,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:51:40,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:51:40,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:51:40,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:51:41,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-26 00:51:41,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:51:41,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:51:41,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976516718] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:51:41,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [547592456] [2022-11-26 00:51:41,138 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:51:41,138 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:51:41,138 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:51:41,138 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:51:41,139 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:51:41,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:41,196 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 [2022-11-26 00:51:41,243 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 11 treesize of output 7 [2022-11-26 00:51:41,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:51:41,342 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 [2022-11-26 00:51:41,399 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 11 treesize of output 7 [2022-11-26 00:51:41,474 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:51:41,475 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 90 treesize of output 89 [2022-11-26 00:51:41,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:51:41,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:51:41,744 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-11-26 00:51:41,745 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 177 treesize of output 181 [2022-11-26 00:51:41,956 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-11-26 00:51:41,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-11-26 00:51:43,400 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:51:47,884 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2298#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~s~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:51:47,884 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:51:47,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:51:47,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-11-26 00:51:47,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210256552] [2022-11-26 00:51:47,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:51:47,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-26 00:51:47,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:51:47,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-26 00:51:47,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1319, Unknown=0, NotChecked=0, Total=1482 [2022-11-26 00:51:47,887 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:48,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:51:48,317 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2022-11-26 00:51:48,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:51:48,318 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-26 00:51:48,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:51:48,318 INFO L225 Difference]: With dead ends: 69 [2022-11-26 00:51:48,318 INFO L226 Difference]: Without dead ends: 65 [2022-11-26 00:51:48,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=265, Invalid=1805, Unknown=0, NotChecked=0, Total=2070 [2022-11-26 00:51:48,320 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 117 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:51:48,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 76 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:51:48,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-26 00:51:48,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2022-11-26 00:51:48,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 61 states have (on average 1.180327868852459) internal successors, (72), 62 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:48,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2022-11-26 00:51:48,324 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 21 [2022-11-26 00:51:48,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:51:48,325 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2022-11-26 00:51:48,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:48,325 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2022-11-26 00:51:48,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-26 00:51:48,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:51:48,326 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:51:48,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-26 00:51:48,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:51:48,531 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:51:48,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:51:48,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1271146266, now seen corresponding path program 3 times [2022-11-26 00:51:48,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:51:48,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472498752] [2022-11-26 00:51:48,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:48,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:51:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:51:48,970 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:51:48,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:51:48,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472498752] [2022-11-26 00:51:48,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472498752] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:51:48,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103197655] [2022-11-26 00:51:48,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:51:48,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:51:48,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:51:48,973 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:51:48,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:51:49,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:51:49,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:51:49,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-26 00:51:49,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:51:49,120 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:51:49,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-26 00:51:49,266 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:51:49,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:51:49,531 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:51:49,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103197655] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:51:49,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [587601112] [2022-11-26 00:51:49,533 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:51:49,533 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:51:49,534 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:51:49,534 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:51:49,534 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:51:49,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:49,578 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 [2022-11-26 00:51:49,623 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 11 treesize of output 7 [2022-11-26 00:51:49,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:51:49,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:51:49,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:51:49,826 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:51:49,826 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 90 treesize of output 89 [2022-11-26 00:51:49,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:51:49,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:51:50,060 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-11-26 00:51:50,061 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 177 treesize of output 181 [2022-11-26 00:51:50,255 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-11-26 00:51:50,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-11-26 00:51:51,475 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:51:55,937 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2614#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~s~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:51:55,937 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:51:55,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:51:55,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2022-11-26 00:51:55,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547934874] [2022-11-26 00:51:55,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:51:55,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-26 00:51:55,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:51:55,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-26 00:51:55,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1235, Unknown=0, NotChecked=0, Total=1406 [2022-11-26 00:51:55,940 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 24 states, 23 states have (on average 2.652173913043478) internal successors, (61), 24 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) [2022-11-26 00:51:56,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:51:56,429 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2022-11-26 00:51:56,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:51:56,430 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.652173913043478) internal successors, (61), 24 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 23 [2022-11-26 00:51:56,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:51:56,432 INFO L225 Difference]: With dead ends: 102 [2022-11-26 00:51:56,432 INFO L226 Difference]: Without dead ends: 102 [2022-11-26 00:51:56,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=290, Invalid=1690, Unknown=0, NotChecked=0, Total=1980 [2022-11-26 00:51:56,433 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 325 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:51:56,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 60 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:51:56,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-26 00:51:56,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 71. [2022-11-26 00:51:56,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 70 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) [2022-11-26 00:51:56,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2022-11-26 00:51:56,438 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 23 [2022-11-26 00:51:56,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:51:56,438 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2022-11-26 00:51:56,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.652173913043478) internal successors, (61), 24 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) [2022-11-26 00:51:56,438 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2022-11-26 00:51:56,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-26 00:51:56,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:51:56,439 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:51:56,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:51:56,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-26 00:51:56,645 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:51:56,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:51:56,646 INFO L85 PathProgramCache]: Analyzing trace with hash 297700333, now seen corresponding path program 4 times [2022-11-26 00:51:56,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:51:56,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974788372] [2022-11-26 00:51:56,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:56,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:51:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:51:58,129 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:51:58,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:51:58,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974788372] [2022-11-26 00:51:58,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974788372] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:51:58,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322127180] [2022-11-26 00:51:58,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:51:58,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:51:58,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:51:58,135 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:51:58,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:51:58,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:51:58,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-26 00:51:58,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:51:58,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:51:58,616 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:51:58,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:51:58,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-26 00:51:58,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:51:58,861 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:51:58,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322127180] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:51:58,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [62072172] [2022-11-26 00:51:58,863 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:51:58,864 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:51:58,864 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:51:58,864 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:51:58,864 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:51:58,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:58,896 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 [2022-11-26 00:51:58,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:51:58,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:51:59,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:51:59,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:51:59,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:51:59,154 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 [2022-11-26 00:51:59,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:51:59,211 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 14 treesize of output 10 [2022-11-26 00:51:59,270 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-26 00:51:59,270 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 [2022-11-26 00:51:59,442 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:52:02,399 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2998#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~s~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:52:02,399 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:52:02,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:52:02,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 27 [2022-11-26 00:52:02,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342907339] [2022-11-26 00:52:02,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:52:02,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-26 00:52:02,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:52:02,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-26 00:52:02,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1498, Unknown=0, NotChecked=0, Total=1640 [2022-11-26 00:52:02,402 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 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) [2022-11-26 00:52:04,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:52:04,490 INFO L93 Difference]: Finished difference Result 233 states and 259 transitions. [2022-11-26 00:52:04,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-26 00:52:04,490 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 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) Word has length 27 [2022-11-26 00:52:04,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:52:04,492 INFO L225 Difference]: With dead ends: 233 [2022-11-26 00:52:04,492 INFO L226 Difference]: Without dead ends: 225 [2022-11-26 00:52:04,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=372, Invalid=3168, Unknown=0, NotChecked=0, Total=3540 [2022-11-26 00:52:04,494 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 319 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:52:04,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 111 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:52:04,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-26 00:52:04,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 102. [2022-11-26 00:52:04,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 100 states have (on average 1.17) internal successors, (117), 101 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) [2022-11-26 00:52:04,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 117 transitions. [2022-11-26 00:52:04,500 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 117 transitions. Word has length 27 [2022-11-26 00:52:04,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:52:04,500 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 117 transitions. [2022-11-26 00:52:04,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 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) [2022-11-26 00:52:04,501 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 117 transitions. [2022-11-26 00:52:04,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-26 00:52:04,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:52:04,502 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:52:04,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:52:04,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:52:04,707 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:52:04,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:52:04,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1136510355, now seen corresponding path program 2 times [2022-11-26 00:52:04,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:52:04,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251720745] [2022-11-26 00:52:04,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:52:04,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:52:04,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:52:05,158 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:52:05,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:52:05,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251720745] [2022-11-26 00:52:05,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251720745] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:52:05,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653763126] [2022-11-26 00:52:05,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:52:05,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:52:05,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:52:05,160 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:52:05,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:52:05,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:52:05,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:52:05,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-26 00:52:05,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:52:05,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:52:05,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:52:05,474 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 [2022-11-26 00:52:05,835 INFO L321 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2022-11-26 00:52:05,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 30 [2022-11-26 00:52:05,861 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:52:05,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:52:06,151 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_326 (Array Int Int)) (|ULTIMATE.start_cstrpbrk_~s~0#1.offset| Int) (|ULTIMATE.start_cstrpbrk_~s~0#1.base| Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_326))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_cstrpbrk_~s~0#1.base|) |ULTIMATE.start_cstrpbrk_~s~0#1.offset|))) (or (= .cse0 0) (not (= .cse0 (select (select .cse1 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)))))))) is different from false [2022-11-26 00:52:06,160 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:52:06,161 INFO L350 Elim1Store]: Elim1 eliminated variable 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 64 treesize of output 42 [2022-11-26 00:52:06,183 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:52:06,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 116 [2022-11-26 00:52:06,198 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:52:06,198 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 68 treesize of output 64 [2022-11-26 00:52:06,526 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:52:06,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653763126] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:52:06,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1051733981] [2022-11-26 00:52:06,528 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 00:52:06,528 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:52:06,528 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:52:06,529 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:52:06,529 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:52:06,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:06,569 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 [2022-11-26 00:52:06,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:52:06,650 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 [2022-11-26 00:52:06,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:52:06,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:52:06,784 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 [2022-11-26 00:52:06,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:52:06,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:52:06,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:52:06,943 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-26 00:52:06,943 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 [2022-11-26 00:52:07,322 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:52:10,622 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3577#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:52:10,622 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:52:10,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:52:10,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 29 [2022-11-26 00:52:10,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119374536] [2022-11-26 00:52:10,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:52:10,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-26 00:52:10,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:52:10,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-26 00:52:10,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1719, Unknown=1, NotChecked=84, Total=1980 [2022-11-26 00:52:10,625 INFO L87 Difference]: Start difference. First operand 102 states and 117 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:52:15,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:52:15,297 INFO L93 Difference]: Finished difference Result 165 states and 185 transitions. [2022-11-26 00:52:15,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-26 00:52:15,297 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-26 00:52:15,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:52:15,298 INFO L225 Difference]: With dead ends: 165 [2022-11-26 00:52:15,298 INFO L226 Difference]: Without dead ends: 131 [2022-11-26 00:52:15,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=253, Invalid=2200, Unknown=1, NotChecked=96, Total=2550 [2022-11-26 00:52:15,300 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 65 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:52:15,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 134 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 280 Invalid, 4 Unknown, 30 Unchecked, 0.3s Time] [2022-11-26 00:52:15,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-26 00:52:15,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2022-11-26 00:52:15,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 127 states have (on average 1.1574803149606299) internal successors, (147), 128 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:52:15,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 147 transitions. [2022-11-26 00:52:15,305 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 147 transitions. Word has length 28 [2022-11-26 00:52:15,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:52:15,305 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 147 transitions. [2022-11-26 00:52:15,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:52:15,305 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 147 transitions. [2022-11-26 00:52:15,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-26 00:52:15,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:52:15,306 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:52:15,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:52:15,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:52:15,513 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:52:15,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:52:15,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1739438341, now seen corresponding path program 5 times [2022-11-26 00:52:15,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:52:15,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700845086] [2022-11-26 00:52:15,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:52:15,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:52:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:52:16,016 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:52:16,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:52:16,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700845086] [2022-11-26 00:52:16,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700845086] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:52:16,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415941619] [2022-11-26 00:52:16,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:52:16,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:52:16,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:52:16,018 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:52:16,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:52:16,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-26 00:52:16,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:52:16,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-26 00:52:16,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:52:16,434 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:52:16,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:52:16,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-26 00:52:16,806 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:52:16,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415941619] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:52:16,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [771176497] [2022-11-26 00:52:16,808 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:52:16,809 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:52:16,809 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:52:16,809 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:52:16,809 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:52:16,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:16,836 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 [2022-11-26 00:52:16,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:52:16,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:52:16,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:52:17,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:52:17,071 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:52:17,071 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 90 treesize of output 89 [2022-11-26 00:52:17,128 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 [2022-11-26 00:52:17,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:52:17,243 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-11-26 00:52:17,244 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 177 treesize of output 181 [2022-11-26 00:52:17,448 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-11-26 00:52:17,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-11-26 00:52:18,416 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:52:23,227 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4094#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~s~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:52:23,227 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:52:23,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:52:23,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-11-26 00:52:23,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292694212] [2022-11-26 00:52:23,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:52:23,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-26 00:52:23,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:52:23,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-26 00:52:23,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1530, Unknown=0, NotChecked=0, Total=1722 [2022-11-26 00:52:23,229 INFO L87 Difference]: Start difference. First operand 129 states and 147 transitions. Second operand has 28 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 28 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:52:24,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:52:24,090 INFO L93 Difference]: Finished difference Result 184 states and 204 transitions. [2022-11-26 00:52:24,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 00:52:24,091 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 28 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-26 00:52:24,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:52:24,092 INFO L225 Difference]: With dead ends: 184 [2022-11-26 00:52:24,093 INFO L226 Difference]: Without dead ends: 184 [2022-11-26 00:52:24,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=352, Invalid=2198, Unknown=0, NotChecked=0, Total=2550 [2022-11-26 00:52:24,094 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 290 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:52:24,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 106 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:52:24,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-26 00:52:24,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 141. [2022-11-26 00:52:24,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 139 states have (on average 1.158273381294964) internal successors, (161), 140 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:52:24,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 161 transitions. [2022-11-26 00:52:24,101 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 161 transitions. Word has length 29 [2022-11-26 00:52:24,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:52:24,101 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 161 transitions. [2022-11-26 00:52:24,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 28 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:52:24,102 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 161 transitions. [2022-11-26 00:52:24,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-26 00:52:24,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:52:24,103 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:52:24,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:52:24,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-26 00:52:24,310 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:52:24,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:52:24,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1151087095, now seen corresponding path program 3 times [2022-11-26 00:52:24,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:52:24,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466487636] [2022-11-26 00:52:24,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:52:24,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:52:24,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:52:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:52:24,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:52:24,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466487636] [2022-11-26 00:52:24,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466487636] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:52:24,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814760411] [2022-11-26 00:52:24,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:52:24,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:52:24,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:52:24,607 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:52:24,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:52:24,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:52:24,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:52:24,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-26 00:52:24,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:52:24,970 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:52:24,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:52:25,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:52:25,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:52:25,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814760411] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:52:25,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [617517879] [2022-11-26 00:52:25,298 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 00:52:25,299 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:52:25,299 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:52:25,299 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:52:25,299 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:52:25,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:25,336 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 [2022-11-26 00:52:25,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:52:25,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:52:25,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:52:25,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:52:25,569 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:52:25,570 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 90 treesize of output 89 [2022-11-26 00:52:25,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:52:25,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:52:25,750 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-11-26 00:52:25,750 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 177 treesize of output 181 [2022-11-26 00:52:25,918 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-11-26 00:52:25,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-11-26 00:52:27,328 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:52:31,554 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4645#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:52:31,554 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:52:31,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:52:31,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2022-11-26 00:52:31,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058669983] [2022-11-26 00:52:31,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:52:31,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 00:52:31,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:52:31,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 00:52:31,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1039, Unknown=0, NotChecked=0, Total=1190 [2022-11-26 00:52:31,556 INFO L87 Difference]: Start difference. First operand 141 states and 161 transitions. Second operand has 20 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:52:31,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:52:31,999 INFO L93 Difference]: Finished difference Result 230 states and 258 transitions. [2022-11-26 00:52:31,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-26 00:52:31,999 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-26 00:52:31,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:52:32,000 INFO L225 Difference]: With dead ends: 230 [2022-11-26 00:52:32,001 INFO L226 Difference]: Without dead ends: 230 [2022-11-26 00:52:32,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=243, Invalid=1479, Unknown=0, NotChecked=0, Total=1722 [2022-11-26 00:52:32,002 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 208 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:52:32,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 97 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:52:32,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-26 00:52:32,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 185. [2022-11-26 00:52:32,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 183 states have (on average 1.1530054644808743) internal successors, (211), 184 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:52:32,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 211 transitions. [2022-11-26 00:52:32,009 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 211 transitions. Word has length 30 [2022-11-26 00:52:32,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:52:32,010 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 211 transitions. [2022-11-26 00:52:32,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:52:32,010 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 211 transitions. [2022-11-26 00:52:32,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-26 00:52:32,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:52:32,011 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:52:32,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:52:32,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-26 00:52:32,218 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:52:32,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:52:32,218 INFO L85 PathProgramCache]: Analyzing trace with hash 169207682, now seen corresponding path program 6 times [2022-11-26 00:52:32,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:52:32,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409912030] [2022-11-26 00:52:32,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:52:32,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:52:32,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:52:32,838 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:52:32,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:52:32,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409912030] [2022-11-26 00:52:32,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409912030] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:52:32,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869272520] [2022-11-26 00:52:32,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:52:32,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:52:32,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:52:32,841 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:52:32,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:52:32,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:52:32,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:52:32,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-26 00:52:32,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:52:33,170 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 [2022-11-26 00:52:33,380 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:52:33,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:52:33,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-26 00:52:33,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:52:33,656 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:52:33,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869272520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:52:33,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [563141999] [2022-11-26 00:52:33,658 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:52:33,658 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:52:33,658 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:52:33,658 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:52:33,658 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:52:33,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:33,701 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 [2022-11-26 00:52:33,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:52:33,798 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 [2022-11-26 00:52:33,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:52:33,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:52:33,947 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:52:33,948 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 90 treesize of output 89 [2022-11-26 00:52:34,007 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 [2022-11-26 00:52:34,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:52:34,127 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-11-26 00:52:34,127 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 177 treesize of output 181 [2022-11-26 00:52:34,282 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-11-26 00:52:34,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-11-26 00:52:35,248 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:52:41,021 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5308#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~s~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:52:41,021 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:52:41,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:52:41,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-11-26 00:52:41,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57503529] [2022-11-26 00:52:41,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:52:41,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-26 00:52:41,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:52:41,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-26 00:52:41,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2022-11-26 00:52:41,024 INFO L87 Difference]: Start difference. First operand 185 states and 211 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:52:42,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:52:42,146 INFO L93 Difference]: Finished difference Result 297 states and 328 transitions. [2022-11-26 00:52:42,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-26 00:52:42,147 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 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 [2022-11-26 00:52:42,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:52:42,148 INFO L225 Difference]: With dead ends: 297 [2022-11-26 00:52:42,148 INFO L226 Difference]: Without dead ends: 272 [2022-11-26 00:52:42,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=301, Invalid=2351, Unknown=0, NotChecked=0, Total=2652 [2022-11-26 00:52:42,150 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 227 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:52:42,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 336 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:52:42,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-26 00:52:42,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 243. [2022-11-26 00:52:42,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 241 states have (on average 1.1493775933609958) internal successors, (277), 242 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:52:42,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 277 transitions. [2022-11-26 00:52:42,158 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 277 transitions. Word has length 33 [2022-11-26 00:52:42,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:52:42,158 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 277 transitions. [2022-11-26 00:52:42,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:52:42,159 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 277 transitions. [2022-11-26 00:52:42,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-26 00:52:42,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:52:42,160 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:52:42,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 00:52:42,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-26 00:52:42,366 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:52:42,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:52:42,367 INFO L85 PathProgramCache]: Analyzing trace with hash 675848208, now seen corresponding path program 7 times [2022-11-26 00:52:42,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:52:42,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428750655] [2022-11-26 00:52:42,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:52:42,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:52:42,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:52:42,885 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:52:42,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:52:42,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428750655] [2022-11-26 00:52:42,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428750655] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:52:42,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877272352] [2022-11-26 00:52:42,886 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:52:42,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:52:42,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:52:42,891 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:52:42,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 00:52:43,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:52:43,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-26 00:52:43,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:52:43,324 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:52:43,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:52:43,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:52:43,810 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:52:43,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877272352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:52:43,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1123140239] [2022-11-26 00:52:43,812 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:52:43,812 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:52:43,812 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:52:43,813 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:52:43,813 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:52:43,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:43,846 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 [2022-11-26 00:52:43,882 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 11 treesize of output 7 [2022-11-26 00:52:43,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:52:43,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:52:44,013 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 11 treesize of output 7 [2022-11-26 00:52:44,084 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:52:44,085 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 90 treesize of output 89 [2022-11-26 00:52:44,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:52:44,162 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 [2022-11-26 00:52:44,329 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-11-26 00:52:44,330 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 177 treesize of output 181 [2022-11-26 00:52:44,542 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-11-26 00:52:44,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-11-26 00:52:45,693 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:52:51,847 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6117#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~s~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:52:51,847 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:52:51,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:52:51,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 28 [2022-11-26 00:52:51,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523502336] [2022-11-26 00:52:51,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:52:51,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-26 00:52:51,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:52:51,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-26 00:52:51,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1604, Unknown=0, NotChecked=0, Total=1806 [2022-11-26 00:52:51,850 INFO L87 Difference]: Start difference. First operand 243 states and 277 transitions. Second operand has 29 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:52:53,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:52:53,204 INFO L93 Difference]: Finished difference Result 334 states and 371 transitions. [2022-11-26 00:52:53,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-26 00:52:53,205 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-26 00:52:53,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:52:53,207 INFO L225 Difference]: With dead ends: 334 [2022-11-26 00:52:53,207 INFO L226 Difference]: Without dead ends: 334 [2022-11-26 00:52:53,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=409, Invalid=2453, Unknown=0, NotChecked=0, Total=2862 [2022-11-26 00:52:53,208 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 257 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:52:53,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 237 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1035 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 00:52:53,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-11-26 00:52:53,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 259. [2022-11-26 00:52:53,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 257 states have (on average 1.1517509727626458) internal successors, (296), 258 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:52:53,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 296 transitions. [2022-11-26 00:52:53,218 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 296 transitions. Word has length 35 [2022-11-26 00:52:53,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:52:53,219 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 296 transitions. [2022-11-26 00:52:53,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:52:53,219 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 296 transitions. [2022-11-26 00:52:53,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-26 00:52:53,220 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:52:53,220 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:52:53,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 00:52:53,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-26 00:52:53,431 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:52:53,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:52:53,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1772114409, now seen corresponding path program 8 times [2022-11-26 00:52:53,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:52:53,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975141053] [2022-11-26 00:52:53,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:52:53,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:52:53,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:52:54,127 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:52:54,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:52:54,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975141053] [2022-11-26 00:52:54,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975141053] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:52:54,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411533076] [2022-11-26 00:52:54,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:52:54,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:52:54,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:52:54,131 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:52:54,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 00:52:54,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-26 00:52:54,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:52:54,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-26 00:52:54,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:52:54,511 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 [2022-11-26 00:52:54,766 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:52:54,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:52:54,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-26 00:52:54,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:52:55,085 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:52:55,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411533076] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:52:55,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [557512476] [2022-11-26 00:52:55,086 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:52:55,086 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:52:55,087 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:52:55,087 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:52:55,087 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:52:55,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:52:55,127 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 [2022-11-26 00:52:55,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:52:55,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:52:55,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:52:55,304 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 [2022-11-26 00:52:55,356 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 91 treesize of output 83 [2022-11-26 00:52:55,409 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 [2022-11-26 00:52:55,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:52:55,486 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 [2022-11-26 00:52:55,540 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-26 00:52:55,540 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 [2022-11-26 00:52:55,713 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:52:59,348 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7004#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~s~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:52:59,348 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:52:59,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:52:59,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 30 [2022-11-26 00:52:59,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098172560] [2022-11-26 00:52:59,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:52:59,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-26 00:52:59,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:52:59,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-26 00:52:59,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1718, Unknown=0, NotChecked=0, Total=1892 [2022-11-26 00:52:59,351 INFO L87 Difference]: Start difference. First operand 259 states and 296 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:53:00,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:53:00,726 INFO L93 Difference]: Finished difference Result 400 states and 444 transitions. [2022-11-26 00:53:00,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-26 00:53:00,726 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 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 [2022-11-26 00:53:00,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:53:00,728 INFO L225 Difference]: With dead ends: 400 [2022-11-26 00:53:00,728 INFO L226 Difference]: Without dead ends: 371 [2022-11-26 00:53:00,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=338, Invalid=2854, Unknown=0, NotChecked=0, Total=3192 [2022-11-26 00:53:00,730 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 346 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:53:00,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 445 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:53:00,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-11-26 00:53:00,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 329. [2022-11-26 00:53:00,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 327 states have (on average 1.1529051987767585) internal successors, (377), 328 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:53:00,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 377 transitions. [2022-11-26 00:53:00,740 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 377 transitions. Word has length 39 [2022-11-26 00:53:00,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:53:00,741 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 377 transitions. [2022-11-26 00:53:00,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:53:00,741 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 377 transitions. [2022-11-26 00:53:00,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-26 00:53:00,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:53:00,742 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:53:00,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 00:53:00,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-26 00:53:00,949 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:53:00,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:53:00,950 INFO L85 PathProgramCache]: Analyzing trace with hash 155482516, now seen corresponding path program 4 times [2022-11-26 00:53:00,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:53:00,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639416293] [2022-11-26 00:53:00,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:00,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:53:00,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:02,956 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:53:02,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:53:02,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639416293] [2022-11-26 00:53:02,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639416293] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:53:02,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915396240] [2022-11-26 00:53:02,957 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:53:02,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:53:02,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:53:02,958 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:53:02,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 00:53:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:03,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-26 00:53:03,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:53:03,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:53:03,560 INFO L321 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2022-11-26 00:53:03,560 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 [2022-11-26 00:53:05,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:05,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:05,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:05,856 INFO L321 Elim1Store]: treesize reduction 48, result has 17.2 percent of original size [2022-11-26 00:53:05,856 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 10 case distinctions, treesize of input 52 treesize of output 29 [2022-11-26 00:53:05,943 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:53:05,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:53:07,103 INFO L321 Elim1Store]: treesize reduction 36, result has 45.5 percent of original size [2022-11-26 00:53:07,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 359 treesize of output 279 [2022-11-26 00:53:07,120 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:53:07,120 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 271 treesize of output 255 [2022-11-26 00:53:07,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:53:07,204 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-26 00:53:07,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2022-11-26 00:53:07,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-26 00:53:07,810 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:53:07,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915396240] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:53:07,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [355684797] [2022-11-26 00:53:07,812 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 00:53:07,812 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:53:07,812 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:53:07,813 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:53:07,813 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:53:07,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:07,850 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 [2022-11-26 00:53:07,882 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 [2022-11-26 00:53:07,923 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 [2022-11-26 00:53:07,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:53:08,015 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 11 treesize of output 7 [2022-11-26 00:53:08,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:53:08,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:53:08,133 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 [2022-11-26 00:53:08,205 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-26 00:53:08,206 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 [2022-11-26 00:53:08,537 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:53:13,889 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8057#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:53:13,889 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:53:13,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:53:13,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 21] total 55 [2022-11-26 00:53:13,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091778547] [2022-11-26 00:53:13,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:53:13,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-26 00:53:13,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:53:13,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-26 00:53:13,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=4675, Unknown=0, NotChecked=0, Total=4970 [2022-11-26 00:53:13,893 INFO L87 Difference]: Start difference. First operand 329 states and 377 transitions. Second operand has 56 states, 56 states have (on average 1.8928571428571428) internal successors, (106), 55 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:53:32,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:53:32,550 INFO L93 Difference]: Finished difference Result 1161 states and 1313 transitions. [2022-11-26 00:53:32,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-26 00:53:32,550 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.8928571428571428) internal successors, (106), 55 states have internal predecessors, (106), 0 states have call successors, (0), 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 [2022-11-26 00:53:32,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:53:32,554 INFO L225 Difference]: With dead ends: 1161 [2022-11-26 00:53:32,554 INFO L226 Difference]: Without dead ends: 1116 [2022-11-26 00:53:32,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5878 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=2275, Invalid=18895, Unknown=0, NotChecked=0, Total=21170 [2022-11-26 00:53:32,560 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1520 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 1960 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:53:32,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1520 Valid, 322 Invalid, 1988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1960 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-26 00:53:32,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2022-11-26 00:53:32,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 841. [2022-11-26 00:53:32,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 839 states have (on average 1.1525625744934447) internal successors, (967), 840 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:53:32,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 967 transitions. [2022-11-26 00:53:32,587 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 967 transitions. Word has length 39 [2022-11-26 00:53:32,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:53:32,587 INFO L495 AbstractCegarLoop]: Abstraction has 841 states and 967 transitions. [2022-11-26 00:53:32,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.8928571428571428) internal successors, (106), 55 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:53:32,588 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 967 transitions. [2022-11-26 00:53:32,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-26 00:53:32,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:53:32,589 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:53:32,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-26 00:53:32,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-26 00:53:32,796 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:53:32,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:53:32,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1721940955, now seen corresponding path program 9 times [2022-11-26 00:53:32,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:53:32,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483154476] [2022-11-26 00:53:32,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:32,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:53:32,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:33,445 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 9 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:53:33,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:53:33,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483154476] [2022-11-26 00:53:33,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483154476] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:53:33,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678994308] [2022-11-26 00:53:33,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:53:33,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:53:33,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:53:33,447 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:53:33,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-26 00:53:33,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:53:33,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:53:33,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-26 00:53:33,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:53:33,649 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:53:33,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-26 00:53:34,024 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 16 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:53:34,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:53:34,751 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 16 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:53:34,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678994308] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:53:34,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1233081710] [2022-11-26 00:53:34,753 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:53:34,753 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:53:34,754 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:53:34,754 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:53:34,754 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:53:34,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:34,784 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 [2022-11-26 00:53:34,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:53:34,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:53:34,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:53:34,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:53:35,017 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:53:35,018 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 90 treesize of output 89 [2022-11-26 00:53:35,085 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 [2022-11-26 00:53:35,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:53:35,210 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-11-26 00:53:35,211 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 177 treesize of output 181 [2022-11-26 00:53:35,429 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-11-26 00:53:35,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-11-26 00:53:36,483 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:53:42,521 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10503#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~s~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:53:42,522 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:53:42,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:53:42,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 38 [2022-11-26 00:53:42,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647975201] [2022-11-26 00:53:42,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:53:42,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-26 00:53:42,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:53:42,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-26 00:53:42,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=2460, Unknown=0, NotChecked=0, Total=2756 [2022-11-26 00:53:42,525 INFO L87 Difference]: Start difference. First operand 841 states and 967 transitions. Second operand has 39 states, 38 states have (on average 2.710526315789474) internal successors, (103), 39 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:53:43,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:53:43,996 INFO L93 Difference]: Finished difference Result 1086 states and 1231 transitions. [2022-11-26 00:53:43,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-26 00:53:43,997 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.710526315789474) internal successors, (103), 39 states have internal predecessors, (103), 0 states have call successors, (0), 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 [2022-11-26 00:53:43,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:53:44,001 INFO L225 Difference]: With dead ends: 1086 [2022-11-26 00:53:44,001 INFO L226 Difference]: Without dead ends: 1086 [2022-11-26 00:53:44,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=640, Invalid=3650, Unknown=0, NotChecked=0, Total=4290 [2022-11-26 00:53:44,003 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 433 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 1201 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:53:44,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 263 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1201 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 00:53:44,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2022-11-26 00:53:44,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 877. [2022-11-26 00:53:44,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 875 states have (on average 1.1554285714285715) internal successors, (1011), 876 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:53:44,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1011 transitions. [2022-11-26 00:53:44,031 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1011 transitions. Word has length 41 [2022-11-26 00:53:44,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:53:44,031 INFO L495 AbstractCegarLoop]: Abstraction has 877 states and 1011 transitions. [2022-11-26 00:53:44,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.710526315789474) internal successors, (103), 39 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:53:44,031 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1011 transitions. [2022-11-26 00:53:44,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-26 00:53:44,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:53:44,033 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:53:44,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-26 00:53:44,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:53:44,240 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:53:44,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:53:44,241 INFO L85 PathProgramCache]: Analyzing trace with hash -2031375522, now seen corresponding path program 5 times [2022-11-26 00:53:44,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:53:44,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843936519] [2022-11-26 00:53:44,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:44,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:53:44,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:44,607 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:53:44,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:53:44,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843936519] [2022-11-26 00:53:44,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843936519] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:53:44,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144612284] [2022-11-26 00:53:44,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:53:44,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:53:44,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:53:44,610 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:53:44,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-26 00:53:44,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-26 00:53:44,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:53:44,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-26 00:53:44,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:53:45,018 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:53:45,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:53:45,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-26 00:53:45,409 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:53:45,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144612284] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:53:45,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1959437349] [2022-11-26 00:53:45,411 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 00:53:45,411 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:53:45,411 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:53:45,412 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:53:45,412 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:53:45,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:45,445 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 [2022-11-26 00:53:45,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:53:45,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:53:45,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:53:45,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:53:45,660 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 [2022-11-26 00:53:45,692 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 [2022-11-26 00:53:45,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:53:45,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:53:45,798 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-26 00:53:45,799 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 [2022-11-26 00:53:46,121 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:53:50,465 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12773#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:53:50,465 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:53:50,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:53:50,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 25 [2022-11-26 00:53:50,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295427935] [2022-11-26 00:53:50,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:53:50,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-26 00:53:50,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:53:50,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-26 00:53:50,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1514, Unknown=0, NotChecked=0, Total=1722 [2022-11-26 00:53:50,467 INFO L87 Difference]: Start difference. First operand 877 states and 1011 transitions. Second operand has 27 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:53:51,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:53:51,049 INFO L93 Difference]: Finished difference Result 1140 states and 1310 transitions. [2022-11-26 00:53:51,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:53:51,050 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 0 states have call successors, (0), 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 [2022-11-26 00:53:51,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:53:51,054 INFO L225 Difference]: With dead ends: 1140 [2022-11-26 00:53:51,055 INFO L226 Difference]: Without dead ends: 1140 [2022-11-26 00:53:51,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 83 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=359, Invalid=2191, Unknown=0, NotChecked=0, Total=2550 [2022-11-26 00:53:51,056 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 422 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:53:51,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 166 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:53:51,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2022-11-26 00:53:51,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 967. [2022-11-26 00:53:51,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 965 states have (on average 1.1544041450777203) internal successors, (1114), 966 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:53:51,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 1114 transitions. [2022-11-26 00:53:51,086 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 1114 transitions. Word has length 41 [2022-11-26 00:53:51,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:53:51,086 INFO L495 AbstractCegarLoop]: Abstraction has 967 states and 1114 transitions. [2022-11-26 00:53:51,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:53:51,087 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 1114 transitions. [2022-11-26 00:53:51,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-26 00:53:51,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:53:51,088 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:53:51,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-26 00:53:51,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:53:51,311 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:53:51,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:53:51,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1705656236, now seen corresponding path program 10 times [2022-11-26 00:53:51,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:53:51,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392774268] [2022-11-26 00:53:51,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:51,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:53:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:52,011 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 16 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:53:52,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:53:52,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392774268] [2022-11-26 00:53:52,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392774268] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:53:52,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970190746] [2022-11-26 00:53:52,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:53:52,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:53:52,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:53:52,015 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:53:52,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-26 00:53:52,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:52,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-26 00:53:52,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:53:52,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:53:52,591 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 16 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:53:52,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:53:52,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-26 00:53:52,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:53:52,851 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 16 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:53:52,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970190746] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:53:52,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [676267618] [2022-11-26 00:53:52,852 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:53:52,853 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:53:52,853 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:53:52,853 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:53:52,853 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:53:52,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:53:52,904 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 [2022-11-26 00:53:52,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:53:52,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:53:52,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:53:53,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:53:53,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:53:53,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:53:53,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:53:53,195 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-26 00:53:53,195 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 [2022-11-26 00:53:53,378 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:53:56,944 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15210#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~s~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:53:56,944 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:53:56,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:53:56,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 33 [2022-11-26 00:53:56,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914480446] [2022-11-26 00:53:56,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:53:56,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-26 00:53:56,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:53:56,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-26 00:53:56,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1980, Unknown=0, NotChecked=0, Total=2162 [2022-11-26 00:53:56,947 INFO L87 Difference]: Start difference. First operand 967 states and 1114 transitions. Second operand has 33 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 33 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) [2022-11-26 00:53:58,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:53:58,621 INFO L93 Difference]: Finished difference Result 1420 states and 1610 transitions. [2022-11-26 00:53:58,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-26 00:53:58,621 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 33 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 45 [2022-11-26 00:53:58,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:53:58,625 INFO L225 Difference]: With dead ends: 1420 [2022-11-26 00:53:58,626 INFO L226 Difference]: Without dead ends: 1375 [2022-11-26 00:53:58,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=369, Invalid=3413, Unknown=0, NotChecked=0, Total=3782 [2022-11-26 00:53:58,627 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 352 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:53:58,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 707 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1537 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-26 00:53:58,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2022-11-26 00:53:58,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 1235. [2022-11-26 00:53:58,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1235 states, 1233 states have (on average 1.1557177615571776) internal successors, (1425), 1234 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:53:58,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 1425 transitions. [2022-11-26 00:53:58,655 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 1425 transitions. Word has length 45 [2022-11-26 00:53:58,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:53:58,656 INFO L495 AbstractCegarLoop]: Abstraction has 1235 states and 1425 transitions. [2022-11-26 00:53:58,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 33 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) [2022-11-26 00:53:58,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 1425 transitions. [2022-11-26 00:53:58,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-26 00:53:58,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:53:58,658 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:53:58,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-26 00:53:58,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:53:58,864 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:53:58,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:53:58,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1606800489, now seen corresponding path program 1 times [2022-11-26 00:53:58,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:53:58,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517565708] [2022-11-26 00:53:58,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:58,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:53:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:59,451 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:53:59,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:53:59,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517565708] [2022-11-26 00:53:59,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517565708] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:53:59,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802141905] [2022-11-26 00:53:59,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:59,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:53:59,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:53:59,453 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:53:59,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-26 00:53:59,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:59,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-26 00:53:59,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:53:59,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:53:59,784 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 [2022-11-26 00:53:59,833 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 [2022-11-26 00:54:00,279 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-11-26 00:54:00,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2022-11-26 00:54:00,322 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:54:00,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:54:00,617 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_699 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_699) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-11-26 00:54:00,623 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:54:00,624 INFO L350 Elim1Store]: Elim1 eliminated variable 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 [2022-11-26 00:54:00,631 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:54:00,631 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 [2022-11-26 00:54:00,847 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:54:00,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802141905] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:54:00,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1426699669] [2022-11-26 00:54:00,850 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 00:54:00,850 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:54:00,850 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:54:00,850 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:54:00,850 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:54:00,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:00,888 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 [2022-11-26 00:54:00,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:54:00,958 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 [2022-11-26 00:54:00,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:54:01,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:54:01,103 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:54:01,104 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 90 treesize of output 89 [2022-11-26 00:54:01,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:54:01,196 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 14 treesize of output 10 [2022-11-26 00:54:01,311 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-11-26 00:54:01,311 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 177 treesize of output 181 [2022-11-26 00:54:01,464 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-11-26 00:54:01,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-11-26 00:54:02,826 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:54:06,516 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18204#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:54:06,516 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:54:06,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:54:06,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 30 [2022-11-26 00:54:06,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737909794] [2022-11-26 00:54:06,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:54:06,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-26 00:54:06,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:06,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-26 00:54:06,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1826, Unknown=1, NotChecked=86, Total=2070 [2022-11-26 00:54:06,518 INFO L87 Difference]: Start difference. First operand 1235 states and 1425 transitions. Second operand has 31 states, 31 states have (on average 3.161290322580645) internal successors, (98), 30 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:07,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:07,462 INFO L93 Difference]: Finished difference Result 1028 states and 1166 transitions. [2022-11-26 00:54:07,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:54:07,463 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.161290322580645) internal successors, (98), 30 states have internal predecessors, (98), 0 states have call successors, (0), 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 45 [2022-11-26 00:54:07,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:07,466 INFO L225 Difference]: With dead ends: 1028 [2022-11-26 00:54:07,466 INFO L226 Difference]: Without dead ends: 681 [2022-11-26 00:54:07,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 96 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=247, Invalid=2512, Unknown=1, NotChecked=102, Total=2862 [2022-11-26 00:54:07,467 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 124 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:07,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 265 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 613 Invalid, 0 Unknown, 58 Unchecked, 0.6s Time] [2022-11-26 00:54:07,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-11-26 00:54:07,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 589. [2022-11-26 00:54:07,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 587 states have (on average 1.1584327086882453) internal successors, (680), 588 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:07,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 680 transitions. [2022-11-26 00:54:07,481 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 680 transitions. Word has length 45 [2022-11-26 00:54:07,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:07,481 INFO L495 AbstractCegarLoop]: Abstraction has 589 states and 680 transitions. [2022-11-26 00:54:07,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.161290322580645) internal successors, (98), 30 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:07,482 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 680 transitions. [2022-11-26 00:54:07,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-26 00:54:07,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:07,483 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:54:07,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-26 00:54:07,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:07,689 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:54:07,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:07,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1110872890, now seen corresponding path program 11 times [2022-11-26 00:54:07,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:07,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712832710] [2022-11-26 00:54:07,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:07,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:07,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:08,583 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 16 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:54:08,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:08,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712832710] [2022-11-26 00:54:08,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712832710] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:54:08,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508027253] [2022-11-26 00:54:08,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:54:08,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:08,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:54:08,585 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:54:08,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-26 00:54:08,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-26 00:54:08,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:54:08,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-26 00:54:08,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:54:09,394 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 25 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:54:09,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:54:09,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-26 00:54:10,053 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 25 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:54:10,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508027253] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:54:10,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1840654243] [2022-11-26 00:54:10,055 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:54:10,055 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:54:10,055 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:54:10,055 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:54:10,055 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:54:10,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:10,089 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 [2022-11-26 00:54:10,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:54:10,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:54:10,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:54:10,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:54:10,300 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:54:10,301 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 90 treesize of output 89 [2022-11-26 00:54:10,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:54:10,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:54:10,470 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-11-26 00:54:10,471 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 177 treesize of output 181 [2022-11-26 00:54:10,662 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-11-26 00:54:10,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-11-26 00:54:11,605 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:54:17,344 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20171#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~s~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:54:17,344 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:54:17,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:54:17,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 42 [2022-11-26 00:54:17,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547305646] [2022-11-26 00:54:17,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:54:17,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-26 00:54:17,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:17,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-26 00:54:17,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=2850, Unknown=0, NotChecked=0, Total=3192 [2022-11-26 00:54:17,347 INFO L87 Difference]: Start difference. First operand 589 states and 680 transitions. Second operand has 43 states, 42 states have (on average 2.9285714285714284) internal successors, (123), 43 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:19,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:19,050 INFO L93 Difference]: Finished difference Result 778 states and 874 transitions. [2022-11-26 00:54:19,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-26 00:54:19,051 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.9285714285714284) internal successors, (123), 43 states have internal predecessors, (123), 0 states have call successors, (0), 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 47 [2022-11-26 00:54:19,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:19,054 INFO L225 Difference]: With dead ends: 778 [2022-11-26 00:54:19,055 INFO L226 Difference]: Without dead ends: 778 [2022-11-26 00:54:19,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 93 SyntacticMatches, 7 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1805 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=733, Invalid=4379, Unknown=0, NotChecked=0, Total=5112 [2022-11-26 00:54:19,056 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 471 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:19,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 265 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1262 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 00:54:19,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-11-26 00:54:19,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 613. [2022-11-26 00:54:19,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 611 states have (on average 1.160392798690671) internal successors, (709), 612 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:19,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 709 transitions. [2022-11-26 00:54:19,070 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 709 transitions. Word has length 47 [2022-11-26 00:54:19,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:19,071 INFO L495 AbstractCegarLoop]: Abstraction has 613 states and 709 transitions. [2022-11-26 00:54:19,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.9285714285714284) internal successors, (123), 43 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:19,071 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 709 transitions. [2022-11-26 00:54:19,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-26 00:54:19,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:19,073 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:54:19,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-26 00:54:19,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:19,280 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:54:19,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:19,281 INFO L85 PathProgramCache]: Analyzing trace with hash -928527393, now seen corresponding path program 6 times [2022-11-26 00:54:19,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:19,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323877487] [2022-11-26 00:54:19,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:19,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:19,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:20,329 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:54:20,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:20,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323877487] [2022-11-26 00:54:20,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323877487] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:54:20,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762402896] [2022-11-26 00:54:20,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:54:20,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:20,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:54:20,331 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:54:20,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-26 00:54:20,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:54:20,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:54:20,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-26 00:54:20,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:54:20,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:54:20,810 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 [2022-11-26 00:54:20,884 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 [2022-11-26 00:54:22,469 INFO L321 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-11-26 00:54:22,470 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 20 [2022-11-26 00:54:22,537 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:54:22,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:54:23,110 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_784 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_784) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (let ((.cse0 (select .cse2 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1))) (.cse1 (select v_ArrVal_784 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (= .cse0 0) (not (= .cse0 .cse1)) (not (= (select .cse2 (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) .cse1)))))) is different from false [2022-11-26 00:54:23,119 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:54:23,119 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 54 [2022-11-26 00:54:23,134 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:54:23,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 92 [2022-11-26 00:54:23,155 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:54:23,155 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 64 treesize of output 64 [2022-11-26 00:54:23,793 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:54:23,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762402896] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:54:23,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1635594834] [2022-11-26 00:54:23,796 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 00:54:23,796 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:54:23,796 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:54:23,796 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:54:23,797 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:54:23,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:23,827 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 [2022-11-26 00:54:23,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:54:23,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:54:23,923 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 [2022-11-26 00:54:23,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:54:24,021 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:54:24,022 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 90 treesize of output 89 [2022-11-26 00:54:24,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:54:24,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:54:24,201 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-11-26 00:54:24,202 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 177 treesize of output 181 [2022-11-26 00:54:24,366 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-11-26 00:54:24,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-11-26 00:54:25,688 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:54:31,421 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21951#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:54:31,421 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:54:31,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:54:31,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 50 [2022-11-26 00:54:31,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891032052] [2022-11-26 00:54:31,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:54:31,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-26 00:54:31,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:31,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-26 00:54:31,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=3924, Unknown=1, NotChecked=126, Total=4290 [2022-11-26 00:54:31,423 INFO L87 Difference]: Start difference. First operand 613 states and 709 transitions. Second operand has 51 states, 51 states have (on average 2.549019607843137) internal successors, (130), 50 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:41,398 WARN L233 SmtUtils]: Spent 6.17s on a formula simplification. DAG size of input: 40 DAG size of output: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:54:46,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:46,600 INFO L93 Difference]: Finished difference Result 1999 states and 2290 transitions. [2022-11-26 00:54:46,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-26 00:54:46,600 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.549019607843137) internal successors, (130), 50 states have internal predecessors, (130), 0 states have call successors, (0), 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 [2022-11-26 00:54:46,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:46,607 INFO L225 Difference]: With dead ends: 1999 [2022-11-26 00:54:46,607 INFO L226 Difference]: Without dead ends: 1941 [2022-11-26 00:54:46,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2651 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=1110, Invalid=10449, Unknown=1, NotChecked=212, Total=11772 [2022-11-26 00:54:46,609 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1209 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 1932 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1209 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 2081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:46,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1209 Valid, 634 Invalid, 2081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1932 Invalid, 0 Unknown, 143 Unchecked, 1.9s Time] [2022-11-26 00:54:46,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1941 states. [2022-11-26 00:54:46,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1941 to 1393. [2022-11-26 00:54:46,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1391 states have (on average 1.1631919482386772) internal successors, (1618), 1392 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:46,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 1618 transitions. [2022-11-26 00:54:46,640 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 1618 transitions. Word has length 50 [2022-11-26 00:54:46,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:46,640 INFO L495 AbstractCegarLoop]: Abstraction has 1393 states and 1618 transitions. [2022-11-26 00:54:46,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.549019607843137) internal successors, (130), 50 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:46,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 1618 transitions. [2022-11-26 00:54:46,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-26 00:54:46,643 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:46,643 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:54:46,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-26 00:54:46,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-26 00:54:46,850 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:54:46,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:46,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1416363073, now seen corresponding path program 12 times [2022-11-26 00:54:46,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:46,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69420102] [2022-11-26 00:54:46,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:46,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:46,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:47,706 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 19 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:54:47,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:47,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69420102] [2022-11-26 00:54:47,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69420102] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:54:47,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146841751] [2022-11-26 00:54:47,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:54:47,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:47,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:54:47,711 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:54:47,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-26 00:54:47,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:54:47,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:54:47,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-26 00:54:47,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:54:48,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:54:48,387 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 19 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:54:48,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:54:48,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-26 00:54:48,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:54:48,741 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 19 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:54:48,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146841751] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:54:48,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [542664622] [2022-11-26 00:54:48,743 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:54:48,743 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:54:48,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:54:48,744 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:54:48,744 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:54:48,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:48,778 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 [2022-11-26 00:54:48,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:54:48,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:54:48,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:54:48,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:54:49,036 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:54:49,037 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 90 treesize of output 89 [2022-11-26 00:54:49,085 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 [2022-11-26 00:54:49,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:54:49,231 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-11-26 00:54:49,231 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 177 treesize of output 181 [2022-11-26 00:54:49,401 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-11-26 00:54:49,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-11-26 00:54:50,354 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:54:56,137 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25781#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~s~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:54:56,137 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:54:56,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:54:56,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 36 [2022-11-26 00:54:56,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126743913] [2022-11-26 00:54:56,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:54:56,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-26 00:54:56,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:56,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-26 00:54:56,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2266, Unknown=0, NotChecked=0, Total=2450 [2022-11-26 00:54:56,140 INFO L87 Difference]: Start difference. First operand 1393 states and 1618 transitions. Second operand has 36 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:58,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:58,291 INFO L93 Difference]: Finished difference Result 2018 states and 2304 transitions. [2022-11-26 00:54:58,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-26 00:54:58,292 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 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 51 [2022-11-26 00:54:58,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:58,296 INFO L225 Difference]: With dead ends: 2018 [2022-11-26 00:54:58,297 INFO L226 Difference]: Without dead ends: 1912 [2022-11-26 00:54:58,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=394, Invalid=4028, Unknown=0, NotChecked=0, Total=4422 [2022-11-26 00:54:58,298 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 514 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 1866 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 1872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:58,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 850 Invalid, 1872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1866 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-26 00:54:58,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2022-11-26 00:54:58,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 1715. [2022-11-26 00:54:58,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1715 states, 1713 states have (on average 1.165207238762405) internal successors, (1996), 1714 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:58,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1715 states to 1715 states and 1996 transitions. [2022-11-26 00:54:58,329 INFO L78 Accepts]: Start accepts. Automaton has 1715 states and 1996 transitions. Word has length 51 [2022-11-26 00:54:58,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:58,330 INFO L495 AbstractCegarLoop]: Abstraction has 1715 states and 1996 transitions. [2022-11-26 00:54:58,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:54:58,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1715 states and 1996 transitions. [2022-11-26 00:54:58,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-26 00:54:58,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:58,333 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:54:58,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-26 00:54:58,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-26 00:54:58,540 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:54:58,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:58,541 INFO L85 PathProgramCache]: Analyzing trace with hash 527726549, now seen corresponding path program 7 times [2022-11-26 00:54:58,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:58,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607019226] [2022-11-26 00:54:58,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:58,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:58,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:59,014 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:54:59,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:59,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607019226] [2022-11-26 00:54:59,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607019226] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:54:59,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059851601] [2022-11-26 00:54:59,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:54:59,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:59,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:54:59,017 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:54:59,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-26 00:54:59,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:59,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-26 00:54:59,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:54:59,511 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:54:59,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:54:59,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:55:00,033 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:55:00,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059851601] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:55:00,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1923266378] [2022-11-26 00:55:00,035 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 00:55:00,035 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:55:00,036 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:55:00,036 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:55:00,036 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:55:00,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:00,076 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 [2022-11-26 00:55:00,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:55:00,177 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 [2022-11-26 00:55:00,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:55:00,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:55:00,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:55:00,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:55:00,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:55:00,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:55:00,512 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-26 00:55:00,513 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 [2022-11-26 00:55:00,949 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:55:05,810 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29896#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:55:05,811 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:55:05,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:55:05,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 26 [2022-11-26 00:55:05,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773494486] [2022-11-26 00:55:05,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:55:05,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-26 00:55:05,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:55:05,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-26 00:55:05,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1603, Unknown=0, NotChecked=0, Total=1806 [2022-11-26 00:55:05,813 INFO L87 Difference]: Start difference. First operand 1715 states and 1996 transitions. Second operand has 28 states, 27 states have (on average 4.2592592592592595) internal successors, (115), 27 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:55:06,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:55:06,646 INFO L93 Difference]: Finished difference Result 2184 states and 2532 transitions. [2022-11-26 00:55:06,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-26 00:55:06,647 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 4.2592592592592595) internal successors, (115), 27 states have internal predecessors, (115), 0 states have call successors, (0), 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 [2022-11-26 00:55:06,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:55:06,652 INFO L225 Difference]: With dead ends: 2184 [2022-11-26 00:55:06,652 INFO L226 Difference]: Without dead ends: 2184 [2022-11-26 00:55:06,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 115 SyntacticMatches, 9 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=399, Invalid=2463, Unknown=0, NotChecked=0, Total=2862 [2022-11-26 00:55:06,653 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 453 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:55:06,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 234 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:55:06,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2022-11-26 00:55:06,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 1863. [2022-11-26 00:55:06,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1861 states have (on average 1.1644277270284793) internal successors, (2167), 1862 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:55:06,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 2167 transitions. [2022-11-26 00:55:06,690 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 2167 transitions. Word has length 52 [2022-11-26 00:55:06,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:55:06,691 INFO L495 AbstractCegarLoop]: Abstraction has 1863 states and 2167 transitions. [2022-11-26 00:55:06,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 4.2592592592592595) internal successors, (115), 27 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:55:06,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 2167 transitions. [2022-11-26 00:55:06,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-26 00:55:06,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:55:06,694 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:55:06,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-26 00:55:06,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-26 00:55:06,911 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:55:06,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:55:06,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1797067441, now seen corresponding path program 13 times [2022-11-26 00:55:06,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:55:06,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024498709] [2022-11-26 00:55:06,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:55:06,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:55:06,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:55:07,830 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 25 proven. 115 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:55:07,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:55:07,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024498709] [2022-11-26 00:55:07,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024498709] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:55:07,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675848799] [2022-11-26 00:55:07,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:55:07,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:55:07,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:55:07,832 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:55:07,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-26 00:55:07,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:55:07,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-26 00:55:07,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:55:08,471 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 36 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:55:08,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:55:09,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:55:09,345 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 36 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:55:09,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675848799] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:55:09,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [201078055] [2022-11-26 00:55:09,347 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:55:09,347 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:55:09,347 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:55:09,348 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:55:09,348 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:55:09,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:09,387 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 [2022-11-26 00:55:09,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:55:09,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:55:09,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:55:09,528 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 11 treesize of output 7 [2022-11-26 00:55:09,591 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:55:09,592 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 90 treesize of output 89 [2022-11-26 00:55:09,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:55:09,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:55:09,768 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-11-26 00:55:09,768 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 177 treesize of output 181 [2022-11-26 00:55:09,951 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-11-26 00:55:09,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-11-26 00:55:10,896 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:55:16,509 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34333#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~s~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:55:16,509 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:55:16,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:55:16,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 40 [2022-11-26 00:55:16,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042416541] [2022-11-26 00:55:16,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:55:16,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-26 00:55:16,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:55:16,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-26 00:55:16,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2686, Unknown=0, NotChecked=0, Total=2970 [2022-11-26 00:55:16,512 INFO L87 Difference]: Start difference. First operand 1863 states and 2167 transitions. Second operand has 41 states, 40 states have (on average 2.85) internal successors, (114), 41 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:55:19,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:55:19,290 INFO L93 Difference]: Finished difference Result 2330 states and 2660 transitions. [2022-11-26 00:55:19,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-26 00:55:19,291 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.85) internal successors, (114), 41 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-11-26 00:55:19,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:55:19,299 INFO L225 Difference]: With dead ends: 2330 [2022-11-26 00:55:19,299 INFO L226 Difference]: Without dead ends: 2330 [2022-11-26 00:55:19,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 114 SyntacticMatches, 8 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1665 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=728, Invalid=4384, Unknown=0, NotChecked=0, Total=5112 [2022-11-26 00:55:19,301 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 438 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 2359 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 2361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:55:19,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 469 Invalid, 2361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2359 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-26 00:55:19,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2022-11-26 00:55:19,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 1915. [2022-11-26 00:55:19,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1913 states have (on average 1.1662310507056979) internal successors, (2231), 1914 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:55:19,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 2231 transitions. [2022-11-26 00:55:19,344 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 2231 transitions. Word has length 53 [2022-11-26 00:55:19,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:55:19,344 INFO L495 AbstractCegarLoop]: Abstraction has 1915 states and 2231 transitions. [2022-11-26 00:55:19,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.85) internal successors, (114), 41 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:55:19,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 2231 transitions. [2022-11-26 00:55:19,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-26 00:55:19,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:55:19,348 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:55:19,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-26 00:55:19,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-26 00:55:19,554 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:55:19,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:55:19,555 INFO L85 PathProgramCache]: Analyzing trace with hash -2063977640, now seen corresponding path program 2 times [2022-11-26 00:55:19,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:55:19,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770104914] [2022-11-26 00:55:19,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:55:19,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:55:19,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:55:20,954 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 37 proven. 46 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:55:20,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:55:20,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770104914] [2022-11-26 00:55:20,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770104914] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:55:20,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804602204] [2022-11-26 00:55:20,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:55:20,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:55:20,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:55:20,957 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:55:20,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-26 00:55:21,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-26 00:55:21,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:55:21,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-26 00:55:21,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:55:21,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:55:21,631 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 [2022-11-26 00:55:21,706 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 [2022-11-26 00:55:22,205 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-11-26 00:55:22,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2022-11-26 00:55:22,260 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 7 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:55:22,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:55:22,786 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:55:22,786 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-26 00:55:22,794 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:55:22,795 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 [2022-11-26 00:55:23,091 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 78 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:55:23,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804602204] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:55:23,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [653766480] [2022-11-26 00:55:23,093 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 00:55:23,093 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:55:23,093 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:55:23,094 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:55:23,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:55:23,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:23,128 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 [2022-11-26 00:55:23,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:55:23,193 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 [2022-11-26 00:55:23,225 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 [2022-11-26 00:55:23,275 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 11 treesize of output 7 [2022-11-26 00:55:23,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:55:23,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:55:23,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:55:23,461 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-26 00:55:23,462 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 [2022-11-26 00:55:24,197 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:55:27,743 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '38994#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:55:27,743 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:55:27,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:55:27,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 37 [2022-11-26 00:55:27,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516872392] [2022-11-26 00:55:27,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:55:27,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-26 00:55:27,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:55:27,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-26 00:55:27,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2568, Unknown=7, NotChecked=0, Total=2756 [2022-11-26 00:55:27,744 INFO L87 Difference]: Start difference. First operand 1915 states and 2231 transitions. Second operand has 38 states, 38 states have (on average 2.973684210526316) internal successors, (113), 37 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:55:31,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:55:31,048 INFO L93 Difference]: Finished difference Result 1736 states and 1994 transitions. [2022-11-26 00:55:31,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-26 00:55:31,049 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.973684210526316) internal successors, (113), 37 states have internal predecessors, (113), 0 states have call successors, (0), 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 [2022-11-26 00:55:31,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:55:31,052 INFO L225 Difference]: With dead ends: 1736 [2022-11-26 00:55:31,053 INFO L226 Difference]: Without dead ends: 1163 [2022-11-26 00:55:31,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 128 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=387, Invalid=4436, Unknown=7, NotChecked=0, Total=4830 [2022-11-26 00:55:31,054 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 413 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:55:31,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 517 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1130 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-26 00:55:31,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2022-11-26 00:55:31,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 971. [2022-11-26 00:55:31,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 969 states have (on average 1.1651186790505677) internal successors, (1129), 970 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:55:31,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1129 transitions. [2022-11-26 00:55:31,085 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1129 transitions. Word has length 56 [2022-11-26 00:55:31,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:55:31,085 INFO L495 AbstractCegarLoop]: Abstraction has 971 states and 1129 transitions. [2022-11-26 00:55:31,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.973684210526316) internal successors, (113), 37 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:55:31,086 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1129 transitions. [2022-11-26 00:55:31,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-26 00:55:31,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:55:31,089 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:55:31,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-26 00:55:31,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-26 00:55:31,296 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:55:31,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:55:31,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1719878614, now seen corresponding path program 14 times [2022-11-26 00:55:31,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:55:31,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450413033] [2022-11-26 00:55:31,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:55:31,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:55:31,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:55:32,314 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 22 proven. 147 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:55:32,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:55:32,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450413033] [2022-11-26 00:55:32,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450413033] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:55:32,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654635953] [2022-11-26 00:55:32,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:55:32,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:55:32,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:55:32,316 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:55:32,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-26 00:55:32,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-26 00:55:32,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:55:32,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-26 00:55:32,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:55:32,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:55:33,260 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 22 proven. 147 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:55:33,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:55:33,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-26 00:55:33,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:55:33,613 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 22 proven. 147 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:55:33,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654635953] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:55:33,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1862262910] [2022-11-26 00:55:33,614 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:55:33,614 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:55:33,614 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:55:33,615 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:55:33,615 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:55:33,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:33,652 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 [2022-11-26 00:55:33,687 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 14 treesize of output 10 [2022-11-26 00:55:33,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:55:33,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:55:33,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:55:33,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:55:33,878 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 [2022-11-26 00:55:33,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:55:33,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:55:34,006 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-26 00:55:34,006 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 [2022-11-26 00:55:34,160 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:55:38,266 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '42125#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~s~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:55:38,266 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:55:38,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:55:38,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 39 [2022-11-26 00:55:38,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409039726] [2022-11-26 00:55:38,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:55:38,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-26 00:55:38,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:55:38,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-26 00:55:38,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2558, Unknown=0, NotChecked=0, Total=2756 [2022-11-26 00:55:38,269 INFO L87 Difference]: Start difference. First operand 971 states and 1129 transitions. Second operand has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:55:41,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:55:41,251 INFO L93 Difference]: Finished difference Result 1449 states and 1646 transitions. [2022-11-26 00:55:41,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-26 00:55:41,252 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 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 57 [2022-11-26 00:55:41,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:55:41,255 INFO L225 Difference]: With dead ends: 1449 [2022-11-26 00:55:41,255 INFO L226 Difference]: Without dead ends: 1278 [2022-11-26 00:55:41,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 137 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=431, Invalid=4681, Unknown=0, NotChecked=0, Total=5112 [2022-11-26 00:55:41,256 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 613 mSDsluCounter, 1219 mSDsCounter, 0 mSdLazyCounter, 2754 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 2761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 2754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:55:41,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 1290 Invalid, 2761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 2754 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-26 00:55:41,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2022-11-26 00:55:41,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 1147. [2022-11-26 00:55:41,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1145 states have (on average 1.1676855895196507) internal successors, (1337), 1146 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:55:41,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1337 transitions. [2022-11-26 00:55:41,269 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1337 transitions. Word has length 57 [2022-11-26 00:55:41,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:55:41,269 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1337 transitions. [2022-11-26 00:55:41,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:55:41,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1337 transitions. [2022-11-26 00:55:41,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-26 00:55:41,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:55:41,271 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:55:41,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-26 00:55:41,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-26 00:55:41,478 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:55:41,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:55:41,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1730629020, now seen corresponding path program 15 times [2022-11-26 00:55:41,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:55:41,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501164276] [2022-11-26 00:55:41,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:55:41,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:55:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:55:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 36 proven. 148 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:55:42,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:55:42,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501164276] [2022-11-26 00:55:42,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501164276] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:55:42,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032496200] [2022-11-26 00:55:42,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:55:42,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:55:42,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:55:42,495 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:55:42,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-26 00:55:42,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:55:42,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:55:42,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-26 00:55:42,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:55:42,752 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:55:42,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-26 00:55:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 49 proven. 135 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:55:43,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:55:44,446 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 49 proven. 135 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:55:44,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032496200] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:55:44,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1263317935] [2022-11-26 00:55:44,448 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:55:44,448 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:55:44,448 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:55:44,448 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:55:44,449 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:55:44,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:55:44,490 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 [2022-11-26 00:55:44,528 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 11 treesize of output 7 [2022-11-26 00:55:44,583 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:55:44,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:55:44,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:55:44,731 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:55:44,732 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 90 treesize of output 89 [2022-11-26 00:55:44,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:55:44,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:55:44,956 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-11-26 00:55:44,957 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 177 treesize of output 181 [2022-11-26 00:55:45,118 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-11-26 00:55:45,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-11-26 00:55:46,175 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:55:53,193 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '45175#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~s~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:55:53,193 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:55:53,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:55:53,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 53 [2022-11-26 00:55:53,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682440857] [2022-11-26 00:55:53,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:55:53,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-26 00:55:53,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:55:53,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-26 00:55:53,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=4086, Unknown=0, NotChecked=0, Total=4556 [2022-11-26 00:55:53,195 INFO L87 Difference]: Start difference. First operand 1147 states and 1337 transitions. Second operand has 54 states, 53 states have (on average 2.7358490566037736) internal successors, (145), 54 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:55:56,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:55:56,606 INFO L93 Difference]: Finished difference Result 1466 states and 1663 transitions. [2022-11-26 00:55:56,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-26 00:55:56,607 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 2.7358490566037736) internal successors, (145), 54 states have internal predecessors, (145), 0 states have call successors, (0), 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 59 [2022-11-26 00:55:56,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:55:56,611 INFO L225 Difference]: With dead ends: 1466 [2022-11-26 00:55:56,611 INFO L226 Difference]: Without dead ends: 1466 [2022-11-26 00:55:56,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2127 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=1156, Invalid=6326, Unknown=0, NotChecked=0, Total=7482 [2022-11-26 00:55:56,612 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 660 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 3076 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 3077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:55:56,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [660 Valid, 682 Invalid, 3077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3076 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-26 00:55:56,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2022-11-26 00:55:56,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 1179. [2022-11-26 00:55:56,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 1177 states have (on average 1.1690739167374682) internal successors, (1376), 1178 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:55:56,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 1376 transitions. [2022-11-26 00:55:56,634 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 1376 transitions. Word has length 59 [2022-11-26 00:55:56,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:55:56,634 INFO L495 AbstractCegarLoop]: Abstraction has 1179 states and 1376 transitions. [2022-11-26 00:55:56,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 2.7358490566037736) internal successors, (145), 54 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:55:56,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 1376 transitions. [2022-11-26 00:55:56,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-26 00:55:56,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:55:56,636 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:55:56,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-11-26 00:55:56,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:55:56,844 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:55:56,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:55:56,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1567102280, now seen corresponding path program 8 times [2022-11-26 00:55:56,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:55:56,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128897659] [2022-11-26 00:55:56,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:55:56,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:55:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:55:58,124 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 5 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:55:58,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:55:58,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128897659] [2022-11-26 00:55:58,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128897659] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:55:58,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130472959] [2022-11-26 00:55:58,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:55:58,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:55:58,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:55:58,127 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:55:58,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-26 00:55:58,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-26 00:55:58,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:55:58,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-26 00:55:58,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:55:58,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:55:59,047 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 [2022-11-26 00:55:59,120 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 [2022-11-26 00:56:00,942 INFO L321 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-11-26 00:56:00,942 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 20 [2022-11-26 00:56:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 5 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:56:00,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:56:01,729 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:56:01,730 INFO L350 Elim1Store]: Elim1 eliminated variable 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 72 treesize of output 50 [2022-11-26 00:56:01,745 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:56:01,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 88 [2022-11-26 00:56:01,763 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:56:01,763 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 60 treesize of output 62 [2022-11-26 00:56:02,594 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 99 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:56:02,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130472959] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:56:02,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [866496369] [2022-11-26 00:56:02,596 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 00:56:02,596 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:56:02,596 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:56:02,597 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:56:02,597 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:56:02,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:02,633 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 [2022-11-26 00:56:02,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:56:02,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:56:02,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:56:02,792 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 [2022-11-26 00:56:02,840 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 91 treesize of output 83 [2022-11-26 00:56:02,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:56:02,923 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 [2022-11-26 00:56:02,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:56:03,026 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-26 00:56:03,026 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 [2022-11-26 00:56:03,309 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:56:08,309 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '48287#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:56:08,309 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:56:08,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:56:08,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 54 [2022-11-26 00:56:08,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333139472] [2022-11-26 00:56:08,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:56:08,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-26 00:56:08,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:56:08,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-26 00:56:08,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=4562, Unknown=4, NotChecked=0, Total=4830 [2022-11-26 00:56:08,311 INFO L87 Difference]: Start difference. First operand 1179 states and 1376 transitions. Second operand has 55 states, 55 states have (on average 2.6363636363636362) internal successors, (145), 54 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:56:12,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:56:12,692 INFO L93 Difference]: Finished difference Result 3047 states and 3533 transitions. [2022-11-26 00:56:12,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-26 00:56:12,692 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.6363636363636362) internal successors, (145), 54 states have internal predecessors, (145), 0 states have call successors, (0), 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 61 [2022-11-26 00:56:12,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:56:12,698 INFO L225 Difference]: With dead ends: 3047 [2022-11-26 00:56:12,698 INFO L226 Difference]: Without dead ends: 2986 [2022-11-26 00:56:12,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1776 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=619, Invalid=7387, Unknown=4, NotChecked=0, Total=8010 [2022-11-26 00:56:12,699 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 507 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 2180 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 2187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 2180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:56:12,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 894 Invalid, 2187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 2180 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-26 00:56:12,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2986 states. [2022-11-26 00:56:12,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2986 to 1864. [2022-11-26 00:56:12,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1862 states have (on average 1.164876476906552) internal successors, (2169), 1863 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:56:12,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 2169 transitions. [2022-11-26 00:56:12,727 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 2169 transitions. Word has length 61 [2022-11-26 00:56:12,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:56:12,727 INFO L495 AbstractCegarLoop]: Abstraction has 1864 states and 2169 transitions. [2022-11-26 00:56:12,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.6363636363636362) internal successors, (145), 54 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:56:12,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 2169 transitions. [2022-11-26 00:56:12,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-26 00:56:12,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:56:12,730 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:56:12,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-26 00:56:12,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:12,936 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:56:12,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:56:12,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1094088299, now seen corresponding path program 16 times [2022-11-26 00:56:12,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:56:12,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224275032] [2022-11-26 00:56:12,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:12,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:56:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:13,873 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 25 proven. 192 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:56:13,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:56:13,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224275032] [2022-11-26 00:56:13,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224275032] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:56:13,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493208013] [2022-11-26 00:56:13,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:56:13,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:13,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:56:13,875 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:56:13,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-26 00:56:14,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:14,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-26 00:56:14,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:56:14,402 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 [2022-11-26 00:56:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 25 proven. 192 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:56:14,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:56:14,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-26 00:56:14,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:56:15,058 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 25 proven. 192 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:56:15,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493208013] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:56:15,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [67152013] [2022-11-26 00:56:15,059 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:56:15,059 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:56:15,059 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:56:15,059 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:56:15,059 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:56:15,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:15,081 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 [2022-11-26 00:56:15,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:56:15,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:56:15,179 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 [2022-11-26 00:56:15,223 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 [2022-11-26 00:56:15,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:56:15,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:56:15,325 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 [2022-11-26 00:56:15,366 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 [2022-11-26 00:56:15,435 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-26 00:56:15,436 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 [2022-11-26 00:56:15,672 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:56:19,682 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '53667#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~s~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:56:19,682 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:56:19,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:56:19,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 42 [2022-11-26 00:56:19,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116050898] [2022-11-26 00:56:19,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:56:19,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-26 00:56:19,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:56:19,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-26 00:56:19,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=2874, Unknown=0, NotChecked=0, Total=3080 [2022-11-26 00:56:19,684 INFO L87 Difference]: Start difference. First operand 1864 states and 2169 transitions. Second operand has 42 states, 42 states have (on average 2.4761904761904763) internal successors, (104), 42 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:56:23,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:56:23,041 INFO L93 Difference]: Finished difference Result 2625 states and 2998 transitions. [2022-11-26 00:56:23,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-26 00:56:23,041 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.4761904761904763) internal successors, (104), 42 states have internal predecessors, (104), 0 states have call successors, (0), 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 63 [2022-11-26 00:56:23,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:56:23,045 INFO L225 Difference]: With dead ends: 2625 [2022-11-26 00:56:23,045 INFO L226 Difference]: Without dead ends: 2428 [2022-11-26 00:56:23,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 154 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=462, Invalid=5390, Unknown=0, NotChecked=0, Total=5852 [2022-11-26 00:56:23,047 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 550 mSDsluCounter, 1490 mSDsCounter, 0 mSdLazyCounter, 3429 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 1572 SdHoareTripleChecker+Invalid, 3437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 3429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:56:23,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 1572 Invalid, 3437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 3429 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-26 00:56:23,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2022-11-26 00:56:23,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 2191. [2022-11-26 00:56:23,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2191 states, 2189 states have (on average 1.1676564641388762) internal successors, (2556), 2190 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:56:23,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 2556 transitions. [2022-11-26 00:56:23,078 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 2556 transitions. Word has length 63 [2022-11-26 00:56:23,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:56:23,078 INFO L495 AbstractCegarLoop]: Abstraction has 2191 states and 2556 transitions. [2022-11-26 00:56:23,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.4761904761904763) internal successors, (104), 42 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:56:23,079 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 2556 transitions. [2022-11-26 00:56:23,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-26 00:56:23,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:56:23,081 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:56:23,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-11-26 00:56:23,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:23,288 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:56:23,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:56:23,289 INFO L85 PathProgramCache]: Analyzing trace with hash 491221906, now seen corresponding path program 9 times [2022-11-26 00:56:23,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:56:23,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301674763] [2022-11-26 00:56:23,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:23,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:56:23,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:23,768 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 9 proven. 111 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:56:23,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:56:23,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301674763] [2022-11-26 00:56:23,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301674763] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:56:23,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244145016] [2022-11-26 00:56:23,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:56:23,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:23,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:56:23,771 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:56:23,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-26 00:56:23,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:56:23,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:56:23,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-26 00:56:23,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:56:24,366 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 16 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:56:24,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:56:24,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:56:24,928 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 16 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:56:24,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244145016] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:56:24,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [14573858] [2022-11-26 00:56:24,930 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 00:56:24,930 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:56:24,931 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:56:24,931 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:56:24,931 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:56:24,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:24,973 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 [2022-11-26 00:56:24,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:56:25,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:56:25,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:56:25,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:56:25,138 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 [2022-11-26 00:56:25,184 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 14 treesize of output 10 [2022-11-26 00:56:25,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:56:25,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:56:25,291 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-26 00:56:25,291 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 [2022-11-26 00:56:25,579 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:56:29,448 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '58943#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:56:29,449 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:56:29,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:56:29,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 30 [2022-11-26 00:56:29,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464622481] [2022-11-26 00:56:29,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:56:29,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-26 00:56:29,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:56:29,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-26 00:56:29,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1932, Unknown=0, NotChecked=0, Total=2162 [2022-11-26 00:56:29,450 INFO L87 Difference]: Start difference. First operand 2191 states and 2556 transitions. Second operand has 32 states, 31 states have (on average 4.419354838709677) internal successors, (137), 31 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:56:30,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:56:30,488 INFO L93 Difference]: Finished difference Result 3804 states and 4436 transitions. [2022-11-26 00:56:30,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-26 00:56:30,488 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.419354838709677) internal successors, (137), 31 states have internal predecessors, (137), 0 states have call successors, (0), 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 63 [2022-11-26 00:56:30,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:56:30,499 INFO L225 Difference]: With dead ends: 3804 [2022-11-26 00:56:30,500 INFO L226 Difference]: Without dead ends: 3804 [2022-11-26 00:56:30,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 149 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=493, Invalid=3047, Unknown=0, NotChecked=0, Total=3540 [2022-11-26 00:56:30,501 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 483 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:56:30,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 311 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:56:30,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3804 states. [2022-11-26 00:56:30,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3804 to 2417. [2022-11-26 00:56:30,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2415 states have (on average 1.1677018633540373) internal successors, (2820), 2416 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:56:30,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 2820 transitions. [2022-11-26 00:56:30,546 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 2820 transitions. Word has length 63 [2022-11-26 00:56:30,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:56:30,547 INFO L495 AbstractCegarLoop]: Abstraction has 2417 states and 2820 transitions. [2022-11-26 00:56:30,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.419354838709677) internal successors, (137), 31 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:56:30,547 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 2820 transitions. [2022-11-26 00:56:30,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-26 00:56:30,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:56:30,550 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:56:30,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-26 00:56:30,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-11-26 00:56:30,757 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:56:30,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:56:30,757 INFO L85 PathProgramCache]: Analyzing trace with hash -453623175, now seen corresponding path program 17 times [2022-11-26 00:56:30,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:56:30,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628088251] [2022-11-26 00:56:30,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:30,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:56:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:31,822 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 49 proven. 185 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:56:31,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:56:31,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628088251] [2022-11-26 00:56:31,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628088251] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:56:31,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894962112] [2022-11-26 00:56:31,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:56:31,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:31,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:56:31,824 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:56:31,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-26 00:56:32,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-26 00:56:32,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:56:32,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-26 00:56:32,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:56:33,067 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 64 proven. 170 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:56:33,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:56:33,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-26 00:56:34,127 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 64 proven. 170 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:56:34,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894962112] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:56:34,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2033453105] [2022-11-26 00:56:34,128 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:56:34,128 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:56:34,129 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:56:34,129 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:56:34,129 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:56:34,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:34,169 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 [2022-11-26 00:56:34,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:56:34,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:56:34,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:56:34,318 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 14 treesize of output 10 [2022-11-26 00:56:34,358 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 91 treesize of output 83 [2022-11-26 00:56:34,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:56:34,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:56:34,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:56:34,550 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-26 00:56:34,551 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 [2022-11-26 00:56:34,696 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:56:38,525 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '65647#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~s~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:56:38,525 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:56:38,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:56:38,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 57 [2022-11-26 00:56:38,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204813982] [2022-11-26 00:56:38,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:56:38,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-26 00:56:38,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:56:38,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-26 00:56:38,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=570, Invalid=4542, Unknown=0, NotChecked=0, Total=5112 [2022-11-26 00:56:38,527 INFO L87 Difference]: Start difference. First operand 2417 states and 2820 transitions. Second operand has 58 states, 57 states have (on average 3.0) internal successors, (171), 58 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:56:41,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:56:41,575 INFO L93 Difference]: Finished difference Result 2953 states and 3370 transitions. [2022-11-26 00:56:41,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-26 00:56:41,576 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 3.0) internal successors, (171), 58 states have internal predecessors, (171), 0 states have call successors, (0), 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 65 [2022-11-26 00:56:41,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:56:41,593 INFO L225 Difference]: With dead ends: 2953 [2022-11-26 00:56:41,593 INFO L226 Difference]: Without dead ends: 2953 [2022-11-26 00:56:41,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 135 SyntacticMatches, 10 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3101 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1291, Invalid=7265, Unknown=0, NotChecked=0, Total=8556 [2022-11-26 00:56:41,595 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 876 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 2331 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 2333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:56:41,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [876 Valid, 463 Invalid, 2333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2331 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-26 00:56:41,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2953 states. [2022-11-26 00:56:41,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2953 to 2465. [2022-11-26 00:56:41,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2465 states, 2463 states have (on average 1.1688997157937475) internal successors, (2879), 2464 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:56:41,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 2879 transitions. [2022-11-26 00:56:41,627 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 2879 transitions. Word has length 65 [2022-11-26 00:56:41,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:56:41,628 INFO L495 AbstractCegarLoop]: Abstraction has 2465 states and 2879 transitions. [2022-11-26 00:56:41,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 3.0) internal successors, (171), 58 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:56:41,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 2879 transitions. [2022-11-26 00:56:41,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-26 00:56:41,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:56:41,631 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:56:41,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-26 00:56:41,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:41,838 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:56:41,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:56:41,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1667864989, now seen corresponding path program 3 times [2022-11-26 00:56:41,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:56:41,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126433297] [2022-11-26 00:56:41,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:41,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:56:41,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 5 proven. 125 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:56:42,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:56:42,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126433297] [2022-11-26 00:56:42,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126433297] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:56:42,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174853884] [2022-11-26 00:56:42,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:56:42,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:42,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:56:42,717 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:56:42,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-26 00:56:42,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:56:42,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:56:42,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-26 00:56:42,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:56:42,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:56:43,256 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 [2022-11-26 00:56:43,321 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 [2022-11-26 00:56:43,517 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 [2022-11-26 00:56:43,546 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 49 proven. 78 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:56:43,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:56:43,739 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:56:43,740 INFO L350 Elim1Store]: Elim1 eliminated variable 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 [2022-11-26 00:56:43,747 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:56:43,748 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 [2022-11-26 00:56:44,011 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 49 proven. 78 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:56:44,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174853884] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:56:44,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [15170480] [2022-11-26 00:56:44,013 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 00:56:44,013 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:56:44,013 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:56:44,013 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:56:44,013 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:56:44,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:44,050 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 [2022-11-26 00:56:44,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:56:44,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:56:44,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:56:44,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:56:44,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:56:44,254 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 [2022-11-26 00:56:44,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:56:44,336 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-26 00:56:44,337 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 [2022-11-26 00:56:44,857 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:56:48,005 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '71550#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:56:48,005 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:56:48,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:56:48,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 32 [2022-11-26 00:56:48,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060886640] [2022-11-26 00:56:48,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:56:48,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-26 00:56:48,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:56:48,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-26 00:56:48,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2088, Unknown=3, NotChecked=0, Total=2256 [2022-11-26 00:56:48,007 INFO L87 Difference]: Start difference. First operand 2465 states and 2879 transitions. Second operand has 33 states, 33 states have (on average 3.4242424242424243) internal successors, (113), 32 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:56:49,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:56:49,684 INFO L93 Difference]: Finished difference Result 3411 states and 3963 transitions. [2022-11-26 00:56:49,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-26 00:56:49,685 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.4242424242424243) internal successors, (113), 32 states have internal predecessors, (113), 0 states have call successors, (0), 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 67 [2022-11-26 00:56:49,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:56:49,689 INFO L225 Difference]: With dead ends: 3411 [2022-11-26 00:56:49,689 INFO L226 Difference]: Without dead ends: 2122 [2022-11-26 00:56:49,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 168 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=298, Invalid=3239, Unknown=3, NotChecked=0, Total=3540 [2022-11-26 00:56:49,690 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 329 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:56:49,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 778 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1493 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-26 00:56:49,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2022-11-26 00:56:49,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1706. [2022-11-26 00:56:49,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1706 states, 1704 states have (on average 1.1731220657276995) internal successors, (1999), 1705 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:56:49,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 1999 transitions. [2022-11-26 00:56:49,716 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 1999 transitions. Word has length 67 [2022-11-26 00:56:49,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:56:49,717 INFO L495 AbstractCegarLoop]: Abstraction has 1706 states and 1999 transitions. [2022-11-26 00:56:49,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.4242424242424243) internal successors, (113), 32 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:56:49,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 1999 transitions. [2022-11-26 00:56:49,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-26 00:56:49,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:56:49,719 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:56:49,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-26 00:56:49,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-26 00:56:49,926 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:56:49,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:56:49,926 INFO L85 PathProgramCache]: Analyzing trace with hash 624161792, now seen corresponding path program 18 times [2022-11-26 00:56:49,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:56:49,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097219767] [2022-11-26 00:56:49,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:49,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:56:49,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:51,105 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 28 proven. 243 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:56:51,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:56:51,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097219767] [2022-11-26 00:56:51,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097219767] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:56:51,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133276839] [2022-11-26 00:56:51,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:56:51,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:51,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:56:51,107 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:56:51,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-26 00:56:51,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:56:51,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:56:51,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-26 00:56:51,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:56:51,798 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 [2022-11-26 00:56:52,069 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 28 proven. 243 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:56:52,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:56:52,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-26 00:56:52,254 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 16 treesize of output 12 [2022-11-26 00:56:52,488 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 28 proven. 243 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:56:52,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133276839] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:56:52,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [737961995] [2022-11-26 00:56:52,489 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:56:52,490 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:56:52,490 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:56:52,490 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:56:52,490 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:56:52,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:52,522 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 [2022-11-26 00:56:52,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:56:52,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:56:52,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:56:52,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:56:52,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:56:52,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:56:52,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:56:52,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:56:52,855 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-26 00:56:52,856 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 [2022-11-26 00:56:52,997 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:56:57,098 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '77159#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~s~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:56:57,099 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:56:57,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:56:57,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 45 [2022-11-26 00:56:57,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916127488] [2022-11-26 00:56:57,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:56:57,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-26 00:56:57,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:56:57,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-26 00:56:57,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=3208, Unknown=0, NotChecked=0, Total=3422 [2022-11-26 00:56:57,100 INFO L87 Difference]: Start difference. First operand 1706 states and 1999 transitions. Second operand has 45 states, 45 states have (on average 2.488888888888889) internal successors, (112), 45 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:57:01,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:57:01,323 INFO L93 Difference]: Finished difference Result 2463 states and 2824 transitions. [2022-11-26 00:57:01,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-26 00:57:01,323 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.488888888888889) internal successors, (112), 45 states have internal predecessors, (112), 0 states have call successors, (0), 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 69 [2022-11-26 00:57:01,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:57:01,327 INFO L225 Difference]: With dead ends: 2463 [2022-11-26 00:57:01,327 INFO L226 Difference]: Without dead ends: 2171 [2022-11-26 00:57:01,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 171 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1524 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=493, Invalid=6149, Unknown=0, NotChecked=0, Total=6642 [2022-11-26 00:57:01,328 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 839 mSDsluCounter, 2029 mSDsCounter, 0 mSdLazyCounter, 4340 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 2122 SdHoareTripleChecker+Invalid, 4349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 4340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:57:01,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [839 Valid, 2122 Invalid, 4349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 4340 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-26 00:57:01,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2022-11-26 00:57:01,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 1965. [2022-11-26 00:57:01,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1963 states have (on average 1.1757514009169638) internal successors, (2308), 1964 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:57:01,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 2308 transitions. [2022-11-26 00:57:01,347 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 2308 transitions. Word has length 69 [2022-11-26 00:57:01,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:57:01,347 INFO L495 AbstractCegarLoop]: Abstraction has 1965 states and 2308 transitions. [2022-11-26 00:57:01,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.488888888888889) internal successors, (112), 45 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:57:01,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 2308 transitions. [2022-11-26 00:57:01,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-26 00:57:01,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:57:01,349 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:57:01,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-26 00:57:01,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-26 00:57:01,557 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:57:01,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:57:01,557 INFO L85 PathProgramCache]: Analyzing trace with hash 427949454, now seen corresponding path program 19 times [2022-11-26 00:57:01,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:57:01,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250288373] [2022-11-26 00:57:01,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:57:01,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:57:01,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:57:02,681 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 64 proven. 226 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:57:02,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:57:02,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250288373] [2022-11-26 00:57:02,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250288373] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:57:02,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143564892] [2022-11-26 00:57:02,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:57:02,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:57:02,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:57:02,683 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:57:02,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-26 00:57:02,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:57:02,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-26 00:57:02,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:57:03,563 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 81 proven. 209 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:57:03,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:57:04,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:57:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 81 proven. 209 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:57:04,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143564892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:57:04,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1204122320] [2022-11-26 00:57:04,714 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:57:04,714 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:57:04,714 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:57:04,714 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:57:04,714 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:57:04,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:04,741 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 [2022-11-26 00:57:04,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:57:04,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:57:04,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:57:04,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:57:04,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:57:04,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:57:04,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:57:05,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:57:05,062 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-26 00:57:05,063 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 [2022-11-26 00:57:05,228 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:57:09,075 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '82120#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~s~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:57:09,075 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:57:09,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:57:09,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 52 [2022-11-26 00:57:09,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425829387] [2022-11-26 00:57:09,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:57:09,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-26 00:57:09,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:57:09,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-26 00:57:09,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=4000, Unknown=0, NotChecked=0, Total=4422 [2022-11-26 00:57:09,077 INFO L87 Difference]: Start difference. First operand 1965 states and 2308 transitions. Second operand has 53 states, 52 states have (on average 2.8846153846153846) internal successors, (150), 53 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:57:13,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:57:13,584 INFO L93 Difference]: Finished difference Result 2446 states and 2798 transitions. [2022-11-26 00:57:13,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-26 00:57:13,585 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 2.8846153846153846) internal successors, (150), 53 states have internal predecessors, (150), 0 states have call successors, (0), 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 71 [2022-11-26 00:57:13,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:57:13,588 INFO L225 Difference]: With dead ends: 2446 [2022-11-26 00:57:13,588 INFO L226 Difference]: Without dead ends: 2446 [2022-11-26 00:57:13,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 159 SyntacticMatches, 11 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2616 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1193, Invalid=6817, Unknown=0, NotChecked=0, Total=8010 [2022-11-26 00:57:13,590 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 856 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 4219 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 4220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:57:13,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [856 Valid, 791 Invalid, 4220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4219 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-26 00:57:13,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2022-11-26 00:57:13,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2005. [2022-11-26 00:57:13,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2005 states, 2003 states have (on average 1.1767348976535197) internal successors, (2357), 2004 states have internal predecessors, (2357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:57:13,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 2357 transitions. [2022-11-26 00:57:13,614 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 2357 transitions. Word has length 71 [2022-11-26 00:57:13,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:57:13,614 INFO L495 AbstractCegarLoop]: Abstraction has 2005 states and 2357 transitions. [2022-11-26 00:57:13,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 2.8846153846153846) internal successors, (150), 53 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:57:13,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 2357 transitions. [2022-11-26 00:57:13,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-26 00:57:13,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:57:13,617 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:57:13,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-26 00:57:13,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-26 00:57:13,827 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:57:13,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:57:13,828 INFO L85 PathProgramCache]: Analyzing trace with hash 670563883, now seen corresponding path program 10 times [2022-11-26 00:57:13,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:57:13,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137097738] [2022-11-26 00:57:13,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:57:13,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:57:13,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:57:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 6 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:57:15,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:57:15,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137097738] [2022-11-26 00:57:15,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137097738] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:57:15,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564968322] [2022-11-26 00:57:15,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:57:15,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:57:15,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:57:15,213 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:57:15,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-26 00:57:15,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:57:15,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-26 00:57:15,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:57:15,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:57:15,919 INFO L321 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2022-11-26 00:57:15,920 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 [2022-11-26 00:57:18,319 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 41 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:57:18,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:57:19,892 INFO L321 Elim1Store]: treesize reduction 36, result has 45.5 percent of original size [2022-11-26 00:57:19,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 378 treesize of output 303 [2022-11-26 00:57:19,913 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:57:19,914 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 267 treesize of output 251 [2022-11-26 00:57:19,933 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 267 treesize of output 251 [2022-11-26 00:57:20,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:57:20,102 INFO L321 Elim1Store]: treesize reduction 5, result has 87.2 percent of original size [2022-11-26 00:57:20,103 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 95 treesize of output 97 [2022-11-26 00:57:21,062 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 14 proven. 152 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:57:21,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564968322] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:57:21,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [148640295] [2022-11-26 00:57:21,063 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 00:57:21,064 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:57:21,064 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:57:21,064 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:57:21,064 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:57:21,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:21,092 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 [2022-11-26 00:57:21,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:57:21,164 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 [2022-11-26 00:57:21,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:57:21,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:57:21,273 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 [2022-11-26 00:57:21,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:57:21,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:57:21,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:57:21,434 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-26 00:57:21,434 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 [2022-11-26 00:57:21,776 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:57:29,462 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '87123#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:57:29,462 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:57:29,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:57:29,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 25] total 65 [2022-11-26 00:57:29,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334155750] [2022-11-26 00:57:29,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:57:29,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-26 00:57:29,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:57:29,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-26 00:57:29,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=6143, Unknown=0, NotChecked=0, Total=6480 [2022-11-26 00:57:29,464 INFO L87 Difference]: Start difference. First operand 2005 states and 2357 transitions. Second operand has 66 states, 66 states have (on average 3.1363636363636362) internal successors, (207), 65 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:57:37,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:57:37,530 INFO L93 Difference]: Finished difference Result 5386 states and 6290 transitions. [2022-11-26 00:57:37,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-26 00:57:37,531 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.1363636363636362) internal successors, (207), 65 states have internal predecessors, (207), 0 states have call successors, (0), 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 72 [2022-11-26 00:57:37,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:57:37,535 INFO L225 Difference]: With dead ends: 5386 [2022-11-26 00:57:37,536 INFO L226 Difference]: Without dead ends: 4419 [2022-11-26 00:57:37,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 152 SyntacticMatches, 6 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2976 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=991, Invalid=12581, Unknown=0, NotChecked=0, Total=13572 [2022-11-26 00:57:37,537 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 1091 mSDsluCounter, 1472 mSDsCounter, 0 mSdLazyCounter, 3705 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1091 SdHoareTripleChecker+Valid, 1526 SdHoareTripleChecker+Invalid, 3714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 3705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:57:37,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1091 Valid, 1526 Invalid, 3714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 3705 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-26 00:57:37,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4419 states. [2022-11-26 00:57:37,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4419 to 3441. [2022-11-26 00:57:37,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3441 states, 3439 states have (on average 1.173306193660948) internal successors, (4035), 3440 states have internal predecessors, (4035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:57:37,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3441 states to 3441 states and 4035 transitions. [2022-11-26 00:57:37,580 INFO L78 Accepts]: Start accepts. Automaton has 3441 states and 4035 transitions. Word has length 72 [2022-11-26 00:57:37,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:57:37,580 INFO L495 AbstractCegarLoop]: Abstraction has 3441 states and 4035 transitions. [2022-11-26 00:57:37,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.1363636363636362) internal successors, (207), 65 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:57:37,581 INFO L276 IsEmpty]: Start isEmpty. Operand 3441 states and 4035 transitions. [2022-11-26 00:57:37,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-26 00:57:37,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:57:37,584 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:57:37,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-26 00:57:37,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-26 00:57:37,791 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:57:37,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:57:37,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1966363231, now seen corresponding path program 11 times [2022-11-26 00:57:37,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:57:37,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882489452] [2022-11-26 00:57:37,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:57:37,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:57:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:57:38,370 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 16 proven. 161 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:57:38,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:57:38,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882489452] [2022-11-26 00:57:38,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882489452] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:57:38,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364421643] [2022-11-26 00:57:38,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:57:38,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:57:38,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:57:38,372 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:57:38,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-26 00:57:38,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-26 00:57:38,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:57:38,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-26 00:57:38,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:57:39,257 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 25 proven. 152 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:57:39,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:57:39,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-26 00:57:40,047 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 25 proven. 152 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:57:40,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364421643] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:57:40,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [587412078] [2022-11-26 00:57:40,049 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 00:57:40,049 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:57:40,049 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:57:40,049 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:57:40,049 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:57:40,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:40,082 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 [2022-11-26 00:57:40,113 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:57:40,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:57:40,170 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 [2022-11-26 00:57:40,223 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 11 treesize of output 7 [2022-11-26 00:57:40,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:57:40,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:57:40,321 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 [2022-11-26 00:57:40,364 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-26 00:57:40,364 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 [2022-11-26 00:57:40,643 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:57:44,843 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '96517#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:57:44,843 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:57:44,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:57:44,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 40 [2022-11-26 00:57:44,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982250141] [2022-11-26 00:57:44,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:57:44,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-26 00:57:44,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:57:44,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-26 00:57:44,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=2837, Unknown=0, NotChecked=0, Total=3192 [2022-11-26 00:57:44,845 INFO L87 Difference]: Start difference. First operand 3441 states and 4035 transitions. Second operand has 42 states, 41 states have (on average 5.0) internal successors, (205), 41 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:57:46,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:57:46,077 INFO L93 Difference]: Finished difference Result 4752 states and 5562 transitions. [2022-11-26 00:57:46,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-26 00:57:46,078 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 5.0) internal successors, (205), 41 states have internal predecessors, (205), 0 states have call successors, (0), 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 74 [2022-11-26 00:57:46,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:57:46,085 INFO L225 Difference]: With dead ends: 4752 [2022-11-26 00:57:46,085 INFO L226 Difference]: Without dead ends: 4752 [2022-11-26 00:57:46,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 173 SyntacticMatches, 7 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1735 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=731, Invalid=4381, Unknown=0, NotChecked=0, Total=5112 [2022-11-26 00:57:46,087 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 625 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:57:46,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [625 Valid, 335 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:57:46,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4752 states. [2022-11-26 00:57:46,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4752 to 3716. [2022-11-26 00:57:46,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 3714 states have (on average 1.1733979536887453) internal successors, (4358), 3715 states have internal predecessors, (4358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:57:46,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 4358 transitions. [2022-11-26 00:57:46,171 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 4358 transitions. Word has length 74 [2022-11-26 00:57:46,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:57:46,171 INFO L495 AbstractCegarLoop]: Abstraction has 3716 states and 4358 transitions. [2022-11-26 00:57:46,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 5.0) internal successors, (205), 41 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:57:46,172 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 4358 transitions. [2022-11-26 00:57:46,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-26 00:57:46,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:57:46,175 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:57:46,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-26 00:57:46,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-26 00:57:46,386 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:57:46,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:57:46,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1754406037, now seen corresponding path program 20 times [2022-11-26 00:57:46,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:57:46,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889128492] [2022-11-26 00:57:46,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:57:46,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:57:46,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:57:47,792 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 31 proven. 300 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:57:47,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:57:47,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889128492] [2022-11-26 00:57:47,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889128492] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:57:47,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839312986] [2022-11-26 00:57:47,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:57:47,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:57:47,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:57:47,794 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:57:47,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-26 00:57:48,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-26 00:57:48,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:57:48,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-26 00:57:48,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:57:48,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:57:49,218 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 31 proven. 300 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:57:49,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:57:49,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-26 00:57:49,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:57:49,697 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 31 proven. 300 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:57:49,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839312986] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:57:49,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [523019651] [2022-11-26 00:57:49,698 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:57:49,699 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:57:49,699 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:57:49,699 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:57:49,699 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:57:49,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:57:49,732 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 [2022-11-26 00:57:49,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:57:49,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:57:49,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:57:49,869 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 11 treesize of output 7 [2022-11-26 00:57:49,937 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:57:49,937 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 90 treesize of output 89 [2022-11-26 00:57:50,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:57:50,031 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 [2022-11-26 00:57:50,171 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-11-26 00:57:50,171 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 177 treesize of output 181 [2022-11-26 00:57:50,388 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-11-26 00:57:50,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-11-26 00:57:51,473 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:57:58,056 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '105522#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~s~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:57:58,056 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:57:58,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:57:58,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 48 [2022-11-26 00:57:58,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055026394] [2022-11-26 00:57:58,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:57:58,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-26 00:57:58,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:57:58,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-26 00:57:58,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=3566, Unknown=0, NotChecked=0, Total=3782 [2022-11-26 00:57:58,058 INFO L87 Difference]: Start difference. First operand 3716 states and 4358 transitions. Second operand has 48 states, 48 states have (on average 2.5) internal successors, (120), 48 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:03,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:03,546 INFO L93 Difference]: Finished difference Result 5060 states and 5833 transitions. [2022-11-26 00:58:03,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-26 00:58:03,547 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.5) internal successors, (120), 48 states have internal predecessors, (120), 0 states have call successors, (0), 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 75 [2022-11-26 00:58:03,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:03,555 INFO L225 Difference]: With dead ends: 5060 [2022-11-26 00:58:03,555 INFO L226 Difference]: Without dead ends: 4724 [2022-11-26 00:58:03,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 188 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=518, Invalid=6964, Unknown=0, NotChecked=0, Total=7482 [2022-11-26 00:58:03,557 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 740 mSDsluCounter, 2795 mSDsCounter, 0 mSdLazyCounter, 5683 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 740 SdHoareTripleChecker+Valid, 2899 SdHoareTripleChecker+Invalid, 5693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 5683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:03,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [740 Valid, 2899 Invalid, 5693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 5683 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-26 00:58:03,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4724 states. [2022-11-26 00:58:03,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4724 to 4280. [2022-11-26 00:58:03,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4280 states, 4278 states have (on average 1.1762505843852267) internal successors, (5032), 4279 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:03,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4280 states to 4280 states and 5032 transitions. [2022-11-26 00:58:03,630 INFO L78 Accepts]: Start accepts. Automaton has 4280 states and 5032 transitions. Word has length 75 [2022-11-26 00:58:03,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:03,631 INFO L495 AbstractCegarLoop]: Abstraction has 4280 states and 5032 transitions. [2022-11-26 00:58:03,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.5) internal successors, (120), 48 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:03,632 INFO L276 IsEmpty]: Start isEmpty. Operand 4280 states and 5032 transitions. [2022-11-26 00:58:03,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-26 00:58:03,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:03,635 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:58:03,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-26 00:58:03,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-11-26 00:58:03,842 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:58:03,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:03,843 INFO L85 PathProgramCache]: Analyzing trace with hash -634764381, now seen corresponding path program 21 times [2022-11-26 00:58:03,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:03,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600845353] [2022-11-26 00:58:03,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:03,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:03,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:05,004 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 81 proven. 271 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:58:05,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:05,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600845353] [2022-11-26 00:58:05,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600845353] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:58:05,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384956369] [2022-11-26 00:58:05,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:58:05,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:05,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:05,006 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:58:05,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-26 00:58:05,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:58:05,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:58:05,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-26 00:58:05,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:58:05,565 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:58:05,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-26 00:58:06,289 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 100 proven. 252 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:58:06,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:58:07,972 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 100 proven. 252 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:58:07,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384956369] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:58:07,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1397315216] [2022-11-26 00:58:07,974 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:58:07,975 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:58:07,975 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:58:07,975 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:58:07,975 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:58:08,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:08,005 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 [2022-11-26 00:58:08,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:58:08,106 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 [2022-11-26 00:58:08,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:58:08,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:58:08,234 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:58:08,234 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 90 treesize of output 89 [2022-11-26 00:58:08,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:58:08,315 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 [2022-11-26 00:58:08,432 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-11-26 00:58:08,432 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 177 treesize of output 181 [2022-11-26 00:58:08,601 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-11-26 00:58:08,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-11-26 00:58:09,593 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:58:16,340 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '115451#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~s~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:58:16,340 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:58:16,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:58:16,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 68 [2022-11-26 00:58:16,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21507379] [2022-11-26 00:58:16,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:58:16,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-26 00:58:16,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:16,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-26 00:58:16,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=6099, Unknown=0, NotChecked=0, Total=6806 [2022-11-26 00:58:16,342 INFO L87 Difference]: Start difference. First operand 4280 states and 5032 transitions. Second operand has 69 states, 68 states have (on average 2.75) internal successors, (187), 69 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:21,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:21,304 INFO L93 Difference]: Finished difference Result 5126 states and 5898 transitions. [2022-11-26 00:58:21,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-26 00:58:21,305 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 2.75) internal successors, (187), 69 states have internal predecessors, (187), 0 states have call successors, (0), 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 77 [2022-11-26 00:58:21,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:21,313 INFO L225 Difference]: With dead ends: 5126 [2022-11-26 00:58:21,313 INFO L226 Difference]: Without dead ends: 5126 [2022-11-26 00:58:21,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3282 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=1852, Invalid=9704, Unknown=0, NotChecked=0, Total=11556 [2022-11-26 00:58:21,315 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 963 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 4616 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 963 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 4618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:21,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [963 Valid, 987 Invalid, 4618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4616 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-26 00:58:21,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5126 states. [2022-11-26 00:58:21,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5126 to 4344. [2022-11-26 00:58:21,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4344 states, 4342 states have (on average 1.1771073238139107) internal successors, (5111), 4343 states have internal predecessors, (5111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:21,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4344 states to 4344 states and 5111 transitions. [2022-11-26 00:58:21,384 INFO L78 Accepts]: Start accepts. Automaton has 4344 states and 5111 transitions. Word has length 77 [2022-11-26 00:58:21,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:21,384 INFO L495 AbstractCegarLoop]: Abstraction has 4344 states and 5111 transitions. [2022-11-26 00:58:21,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 2.75) internal successors, (187), 69 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:21,385 INFO L276 IsEmpty]: Start isEmpty. Operand 4344 states and 5111 transitions. [2022-11-26 00:58:21,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-26 00:58:21,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:21,389 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:58:21,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-11-26 00:58:21,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:21,598 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:58:21,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:21,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1892634666, now seen corresponding path program 22 times [2022-11-26 00:58:21,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:21,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544506500] [2022-11-26 00:58:21,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:21,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:21,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:23,120 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 34 proven. 363 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:58:23,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:23,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544506500] [2022-11-26 00:58:23,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544506500] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:58:23,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188460628] [2022-11-26 00:58:23,121 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:58:23,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:23,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:23,122 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:58:23,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-26 00:58:23,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:23,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-26 00:58:23,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:58:23,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:58:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 34 proven. 363 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:58:24,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:58:24,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-26 00:58:24,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:58:24,861 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 34 proven. 363 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:58:24,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188460628] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:58:24,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1951528275] [2022-11-26 00:58:24,863 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:58:24,863 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:58:24,863 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:58:24,863 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:58:24,863 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:58:24,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:24,892 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 [2022-11-26 00:58:24,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:58:24,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:58:24,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:58:25,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:58:25,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:58:25,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:58:25,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:58:25,176 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-26 00:58:25,176 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 [2022-11-26 00:58:25,334 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:58:29,769 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '125516#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~s~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:58:29,770 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:58:29,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:58:29,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 51 [2022-11-26 00:58:29,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756853228] [2022-11-26 00:58:29,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:58:29,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-26 00:58:29,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:29,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-26 00:58:29,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=3930, Unknown=0, NotChecked=0, Total=4160 [2022-11-26 00:58:29,773 INFO L87 Difference]: Start difference. First operand 4344 states and 5111 transitions. Second operand has 51 states, 51 states have (on average 2.5098039215686274) internal successors, (128), 51 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:35,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:35,108 INFO L93 Difference]: Finished difference Result 5813 states and 6725 transitions. [2022-11-26 00:58:35,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-26 00:58:35,108 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.5098039215686274) internal successors, (128), 51 states have internal predecessors, (128), 0 states have call successors, (0), 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 81 [2022-11-26 00:58:35,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:35,112 INFO L225 Difference]: With dead ends: 5813 [2022-11-26 00:58:35,112 INFO L226 Difference]: Without dead ends: 5449 [2022-11-26 00:58:35,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 205 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1871 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=555, Invalid=7817, Unknown=0, NotChecked=0, Total=8372 [2022-11-26 00:58:35,113 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 856 mSDsluCounter, 2731 mSDsCounter, 0 mSdLazyCounter, 5851 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 2846 SdHoareTripleChecker+Invalid, 5862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 5851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:35,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [856 Valid, 2846 Invalid, 5862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 5851 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-26 00:58:35,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5449 states. [2022-11-26 00:58:35,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5449 to 4956. [2022-11-26 00:58:35,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4956 states, 4954 states have (on average 1.1798546628986677) internal successors, (5845), 4955 states have internal predecessors, (5845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:35,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4956 states to 4956 states and 5845 transitions. [2022-11-26 00:58:35,160 INFO L78 Accepts]: Start accepts. Automaton has 4956 states and 5845 transitions. Word has length 81 [2022-11-26 00:58:35,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:35,160 INFO L495 AbstractCegarLoop]: Abstraction has 4956 states and 5845 transitions. [2022-11-26 00:58:35,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.5098039215686274) internal successors, (128), 51 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:35,161 INFO L276 IsEmpty]: Start isEmpty. Operand 4956 states and 5845 transitions. [2022-11-26 00:58:35,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-26 00:58:35,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:35,165 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-26 00:58:35,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-26 00:58:35,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:35,375 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:58:35,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:35,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1096448573, now seen corresponding path program 4 times [2022-11-26 00:58:35,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:35,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189416724] [2022-11-26 00:58:35,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:35,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:36,274 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 69 proven. 141 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:58:36,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:36,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189416724] [2022-11-26 00:58:36,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189416724] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:58:36,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496421875] [2022-11-26 00:58:36,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:58:36,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:36,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:36,276 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:58:36,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-26 00:58:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:36,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-26 00:58:36,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:58:36,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:58:36,875 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 [2022-11-26 00:58:36,942 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 [2022-11-26 00:58:37,480 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-11-26 00:58:37,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2022-11-26 00:58:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 9 proven. 204 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:58:37,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:58:38,057 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:58:38,058 INFO L350 Elim1Store]: Elim1 eliminated variable 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 [2022-11-26 00:58:38,064 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:58:38,065 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 [2022-11-26 00:58:38,338 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 6 proven. 207 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:58:38,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496421875] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:58:38,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1182026137] [2022-11-26 00:58:38,340 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 00:58:38,340 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:58:38,340 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:58:38,340 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:58:38,341 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:58:38,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:38,360 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 [2022-11-26 00:58:38,402 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 11 treesize of output 7 [2022-11-26 00:58:38,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:58:38,468 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 14 treesize of output 10 [2022-11-26 00:58:38,511 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 11 treesize of output 7 [2022-11-26 00:58:38,586 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:58:38,586 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 90 treesize of output 89 [2022-11-26 00:58:38,635 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 [2022-11-26 00:58:38,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:58:38,758 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-11-26 00:58:38,758 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 177 treesize of output 181 [2022-11-26 00:58:38,919 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-11-26 00:58:38,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-11-26 00:58:40,300 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:58:44,539 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '136879#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:58:44,539 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:58:44,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:58:44,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 20] total 39 [2022-11-26 00:58:44,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006364072] [2022-11-26 00:58:44,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:58:44,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-26 00:58:44,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:44,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-26 00:58:44,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2785, Unknown=5, NotChecked=0, Total=2970 [2022-11-26 00:58:44,541 INFO L87 Difference]: Start difference. First operand 4956 states and 5845 transitions. Second operand has 40 states, 40 states have (on average 3.5) internal successors, (140), 39 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:47,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:47,095 INFO L93 Difference]: Finished difference Result 5443 states and 6394 transitions. [2022-11-26 00:58:47,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-26 00:58:47,095 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.5) internal successors, (140), 39 states have internal predecessors, (140), 0 states have call successors, (0), 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 82 [2022-11-26 00:58:47,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:47,098 INFO L225 Difference]: With dead ends: 5443 [2022-11-26 00:58:47,099 INFO L226 Difference]: Without dead ends: 3849 [2022-11-26 00:58:47,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 204 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=332, Invalid=4355, Unknown=5, NotChecked=0, Total=4692 [2022-11-26 00:58:47,099 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 415 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 2221 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 2229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:47,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 1153 Invalid, 2229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2221 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-26 00:58:47,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3849 states. [2022-11-26 00:58:47,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3849 to 3091. [2022-11-26 00:58:47,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3091 states, 3089 states have (on average 1.1825833603107803) internal successors, (3653), 3090 states have internal predecessors, (3653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:47,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3091 states to 3091 states and 3653 transitions. [2022-11-26 00:58:47,136 INFO L78 Accepts]: Start accepts. Automaton has 3091 states and 3653 transitions. Word has length 82 [2022-11-26 00:58:47,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:47,136 INFO L495 AbstractCegarLoop]: Abstraction has 3091 states and 3653 transitions. [2022-11-26 00:58:47,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.5) internal successors, (140), 39 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:47,136 INFO L276 IsEmpty]: Start isEmpty. Operand 3091 states and 3653 transitions. [2022-11-26 00:58:47,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-26 00:58:47,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:47,138 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:58:47,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-26 00:58:47,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:47,339 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:58:47,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:47,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1208317112, now seen corresponding path program 23 times [2022-11-26 00:58:47,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:47,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194686895] [2022-11-26 00:58:47,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:47,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:47,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:48,645 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 100 proven. 320 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:58:48,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:48,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194686895] [2022-11-26 00:58:48,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194686895] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:58:48,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323892193] [2022-11-26 00:58:48,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:58:48,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:48,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:48,647 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:58:48,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-26 00:58:49,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-11-26 00:58:49,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:58:49,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-26 00:58:49,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:58:50,496 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 121 proven. 299 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:58:50,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:58:51,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-26 00:58:52,037 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 121 proven. 299 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:58:52,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323892193] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:58:52,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1236667753] [2022-11-26 00:58:52,039 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:58:52,039 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:58:52,039 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:58:52,039 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:58:52,039 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:58:52,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:52,061 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 [2022-11-26 00:58:52,103 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 [2022-11-26 00:58:52,137 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 [2022-11-26 00:58:52,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:58:52,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:58:52,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:58:52,267 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 [2022-11-26 00:58:52,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:58:52,360 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-26 00:58:52,360 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 [2022-11-26 00:58:52,500 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:58:56,718 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '146021#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~s~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:58:56,718 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:58:56,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:58:56,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 72 [2022-11-26 00:58:56,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800413437] [2022-11-26 00:58:56,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:58:56,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-26 00:58:56,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:56,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-26 00:58:56,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=878, Invalid=6604, Unknown=0, NotChecked=0, Total=7482 [2022-11-26 00:58:56,720 INFO L87 Difference]: Start difference. First operand 3091 states and 3653 transitions. Second operand has 73 states, 72 states have (on average 3.0416666666666665) internal successors, (219), 73 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:59:00,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:00,672 INFO L93 Difference]: Finished difference Result 3766 states and 4339 transitions. [2022-11-26 00:59:00,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-26 00:59:00,672 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 3.0416666666666665) internal successors, (219), 73 states have internal predecessors, (219), 0 states have call successors, (0), 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 83 [2022-11-26 00:59:00,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:00,675 INFO L225 Difference]: With dead ends: 3766 [2022-11-26 00:59:00,675 INFO L226 Difference]: Without dead ends: 3766 [2022-11-26 00:59:00,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 177 SyntacticMatches, 13 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4633 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=2028, Invalid=10854, Unknown=0, NotChecked=0, Total=12882 [2022-11-26 00:59:00,693 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 923 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 3188 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 3189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:00,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [923 Valid, 771 Invalid, 3189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3188 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-26 00:59:00,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3766 states. [2022-11-26 00:59:00,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3766 to 3139. [2022-11-26 00:59:00,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3139 states, 3137 states have (on average 1.1832961428116033) internal successors, (3712), 3138 states have internal predecessors, (3712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:59:00,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3139 states to 3139 states and 3712 transitions. [2022-11-26 00:59:00,743 INFO L78 Accepts]: Start accepts. Automaton has 3139 states and 3712 transitions. Word has length 83 [2022-11-26 00:59:00,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:00,743 INFO L495 AbstractCegarLoop]: Abstraction has 3139 states and 3712 transitions. [2022-11-26 00:59:00,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 3.0416666666666665) internal successors, (219), 73 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:59:00,743 INFO L276 IsEmpty]: Start isEmpty. Operand 3139 states and 3712 transitions. [2022-11-26 00:59:00,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-26 00:59:00,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:00,746 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:59:00,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:00,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-11-26 00:59:00,954 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:59:00,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:00,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1562204932, now seen corresponding path program 12 times [2022-11-26 00:59:00,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:00,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573026888] [2022-11-26 00:59:00,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:00,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:00,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:02,503 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 7 proven. 225 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:59:02,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:02,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573026888] [2022-11-26 00:59:02,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573026888] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:02,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271940325] [2022-11-26 00:59:02,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:59:02,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:02,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:02,506 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:02,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-26 00:59:02,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:59:02,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:59:02,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 116 conjunts are in the unsatisfiable core [2022-11-26 00:59:02,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:03,288 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 [2022-11-26 00:59:03,398 INFO L321 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2022-11-26 00:59:03,398 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 [2022-11-26 00:59:07,512 INFO L321 Elim1Store]: treesize reduction 102, result has 27.7 percent of original size [2022-11-26 00:59:07,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 70 treesize of output 61 [2022-11-26 00:59:07,608 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 7 proven. 225 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:59:07,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:59:09,251 INFO L321 Elim1Store]: treesize reduction 55, result has 42.1 percent of original size [2022-11-26 00:59:09,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 514 treesize of output 399 [2022-11-26 00:59:09,277 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:59:09,277 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 359 treesize of output 333 [2022-11-26 00:59:09,299 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 370 treesize of output 346 [2022-11-26 00:59:09,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:59:09,608 INFO L321 Elim1Store]: treesize reduction 10, result has 82.5 percent of original size [2022-11-26 00:59:09,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 142 treesize of output 139 [2022-11-26 00:59:10,870 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 34 proven. 198 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:59:10,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271940325] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:59:10,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1596620539] [2022-11-26 00:59:10,871 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 00:59:10,872 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:59:10,872 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:59:10,872 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:59:10,872 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:59:10,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:10,903 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 [2022-11-26 00:59:10,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:59:10,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:59:10,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:59:11,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:59:11,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:59:11,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:59:11,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:59:11,154 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 [2022-11-26 00:59:11,233 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-26 00:59:11,233 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 [2022-11-26 00:59:11,535 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:59:19,535 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '153562#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:59:19,535 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:59:19,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:59:19,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 30, 30] total 75 [2022-11-26 00:59:19,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807449026] [2022-11-26 00:59:19,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:59:19,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-26 00:59:19,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:19,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-26 00:59:19,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=7779, Unknown=0, NotChecked=0, Total=8190 [2022-11-26 00:59:19,537 INFO L87 Difference]: Start difference. First operand 3139 states and 3712 transitions. Second operand has 76 states, 76 states have (on average 2.6578947368421053) internal successors, (202), 75 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:59:35,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:35,073 INFO L93 Difference]: Finished difference Result 12491 states and 14779 transitions. [2022-11-26 00:59:35,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-26 00:59:35,074 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.6578947368421053) internal successors, (202), 75 states have internal predecessors, (202), 0 states have call successors, (0), 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 83 [2022-11-26 00:59:35,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:35,083 INFO L225 Difference]: With dead ends: 12491 [2022-11-26 00:59:35,083 INFO L226 Difference]: Without dead ends: 12382 [2022-11-26 00:59:35,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 176 SyntacticMatches, 7 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5833 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=1753, Invalid=21809, Unknown=0, NotChecked=0, Total=23562 [2022-11-26 00:59:35,084 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 1286 mSDsluCounter, 1484 mSDsCounter, 0 mSdLazyCounter, 4515 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1286 SdHoareTripleChecker+Valid, 1544 SdHoareTripleChecker+Invalid, 4530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 4515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:35,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1286 Valid, 1544 Invalid, 4530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 4515 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-26 00:59:35,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12382 states. [2022-11-26 00:59:35,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12382 to 8791. [2022-11-26 00:59:35,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8791 states, 8789 states have (on average 1.1878484469222892) internal successors, (10440), 8790 states have internal predecessors, (10440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:59:35,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8791 states to 8791 states and 10440 transitions. [2022-11-26 00:59:35,225 INFO L78 Accepts]: Start accepts. Automaton has 8791 states and 10440 transitions. Word has length 83 [2022-11-26 00:59:35,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:35,225 INFO L495 AbstractCegarLoop]: Abstraction has 8791 states and 10440 transitions. [2022-11-26 00:59:35,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.6578947368421053) internal successors, (202), 75 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:59:35,225 INFO L276 IsEmpty]: Start isEmpty. Operand 8791 states and 10440 transitions. [2022-11-26 00:59:35,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-26 00:59:35,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:35,229 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:59:35,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:35,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:35,436 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:59:35,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:35,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1243467718, now seen corresponding path program 13 times [2022-11-26 00:59:35,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:35,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69136369] [2022-11-26 00:59:35,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:35,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:35,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:36,088 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 25 proven. 220 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:59:36,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:36,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69136369] [2022-11-26 00:59:36,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69136369] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:36,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962213933] [2022-11-26 00:59:36,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:59:36,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:36,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:36,090 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:36,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-26 00:59:36,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:36,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-26 00:59:36,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:36,875 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 36 proven. 209 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:59:36,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:59:37,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:59:37,691 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 36 proven. 209 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:59:37,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962213933] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:59:37,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [538393333] [2022-11-26 00:59:37,692 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 00:59:37,692 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:59:37,692 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:59:37,692 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:59:37,692 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:59:37,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:37,726 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 [2022-11-26 00:59:37,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:59:37,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:59:37,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:59:37,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:59:37,903 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 91 treesize of output 83 [2022-11-26 00:59:37,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:59:38,015 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 [2022-11-26 00:59:38,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:59:38,105 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-26 00:59:38,105 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 [2022-11-26 00:59:38,348 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:59:42,363 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '175529#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:59:42,363 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:59:42,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:59:42,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 38 [2022-11-26 00:59:42,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584645174] [2022-11-26 00:59:42,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:59:42,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-26 00:59:42,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:42,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-26 00:59:42,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=2674, Unknown=0, NotChecked=0, Total=2970 [2022-11-26 00:59:42,365 INFO L87 Difference]: Start difference. First operand 8791 states and 10440 transitions. Second operand has 40 states, 39 states have (on average 4.641025641025641) internal successors, (181), 39 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:59:43,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:43,993 INFO L93 Difference]: Finished difference Result 12262 states and 14536 transitions. [2022-11-26 00:59:43,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-26 00:59:43,994 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 4.641025641025641) internal successors, (181), 39 states have internal predecessors, (181), 0 states have call successors, (0), 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 85 [2022-11-26 00:59:43,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:44,002 INFO L225 Difference]: With dead ends: 12262 [2022-11-26 00:59:44,002 INFO L226 Difference]: Without dead ends: 12262 [2022-11-26 00:59:44,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 209 SyntacticMatches, 8 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=723, Invalid=4389, Unknown=0, NotChecked=0, Total=5112 [2022-11-26 00:59:44,003 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 431 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 1580 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 1582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:44,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 623 Invalid, 1582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1580 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 00:59:44,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12262 states. [2022-11-26 00:59:44,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12262 to 9168. [2022-11-26 00:59:44,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9168 states, 9166 states have (on average 1.1876500109098844) internal successors, (10886), 9167 states have internal predecessors, (10886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:59:44,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9168 states to 9168 states and 10886 transitions. [2022-11-26 00:59:44,102 INFO L78 Accepts]: Start accepts. Automaton has 9168 states and 10886 transitions. Word has length 85 [2022-11-26 00:59:44,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:44,102 INFO L495 AbstractCegarLoop]: Abstraction has 9168 states and 10886 transitions. [2022-11-26 00:59:44,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 4.641025641025641) internal successors, (181), 39 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:59:44,102 INFO L276 IsEmpty]: Start isEmpty. Operand 9168 states and 10886 transitions. [2022-11-26 00:59:44,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-26 00:59:44,106 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:44,106 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:59:44,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:44,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-11-26 00:59:44,307 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-26 00:59:44,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:44,307 INFO L85 PathProgramCache]: Analyzing trace with hash 751955647, now seen corresponding path program 24 times [2022-11-26 00:59:44,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:44,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991531174] [2022-11-26 00:59:44,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:44,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:44,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 37 proven. 432 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:59:45,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:45,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991531174] [2022-11-26 00:59:45,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991531174] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:45,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574800359] [2022-11-26 00:59:45,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:59:45,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:45,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:45,886 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:45,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5514edec-71f6-49f2-8843-8e3ff6c0ab92/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-26 00:59:46,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:59:46,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:59:46,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 125 conjunts are in the unsatisfiable core [2022-11-26 00:59:46,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:46,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 01:02:01,594 INFO L321 Elim1Store]: treesize reduction 45, result has 49.4 percent of original size [2022-11-26 01:02:01,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 132 treesize of output 100 [2022-11-26 01:02:01,600 WARN L718 sPolynomialRelations]: Constructing 1024(two to the power of 10 dual juncts. [2022-11-26 01:02:01,663 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 164 proven. 220 refuted. 85 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:02:01,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:02:58,273 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 166 treesize of output 144 [2022-11-26 01:02:58,283 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:02:58,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 166 treesize of output 122 [2022-11-26 01:03:00,301 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 257 proven. 212 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:03:00,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574800359] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:03:00,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1604322793] [2022-11-26 01:03:00,304 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 01:03:00,304 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:03:00,305 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:03:00,305 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:03:00,305 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:03:00,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:00,334 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 [2022-11-26 01:03:00,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 01:03:00,433 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 [2022-11-26 01:03:00,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 01:03:00,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 01:03:00,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 01:03:00,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 01:03:00,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 01:03:00,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 01:03:00,664 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-26 01:03:00,664 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 [2022-11-26 01:03:00,814 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:03:08,276 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '197650#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (< (select |#length| |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~s~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 01:03:08,277 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:03:08,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:03:08,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 52, 52] total 126 [2022-11-26 01:03:08,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233282841] [2022-11-26 01:03:08,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:03:08,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-11-26 01:03:08,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:03:08,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-11-26 01:03:08,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1568, Invalid=17731, Unknown=161, NotChecked=0, Total=19460 [2022-11-26 01:03:08,279 INFO L87 Difference]: Start difference. First operand 9168 states and 10886 transitions. Second operand has 126 states, 126 states have (on average 1.9285714285714286) internal successors, (243), 126 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:03:25,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:03:28,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:03:30,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:03:31,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:03:40,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:03:50,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:03:54,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:04:04,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:04:05,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:04:10,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:04:11,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:04:12,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:04:17,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:04:22,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:04:23,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:04:26,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:04:31,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:04:38,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:04:41,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:04:45,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:04:47,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]