./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 86c4ccee9690ccdd33683565314ba095e56520aa142914bd8063fc7c4c92940d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 09:54:44,050 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:54:44,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:54:44,065 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:54:44,065 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:54:44,066 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:54:44,066 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:54:44,068 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:54:44,069 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:54:44,069 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:54:44,070 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:54:44,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:54:44,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:54:44,072 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:54:44,073 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:54:44,073 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:54:44,074 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:54:44,075 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:54:44,076 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:54:44,077 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:54:44,078 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:54:44,079 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:54:44,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:54:44,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:54:44,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:54:44,083 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:54:44,083 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:54:44,084 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:54:44,084 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:54:44,085 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:54:44,085 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:54:44,086 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:54:44,086 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:54:44,087 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:54:44,087 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:54:44,088 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:54:44,088 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:54:44,088 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:54:44,088 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:54:44,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:54:44,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:54:44,090 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 09:54:44,106 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:54:44,106 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:54:44,106 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:54:44,106 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:54:44,107 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:54:44,107 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:54:44,107 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:54:44,107 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:54:44,107 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:54:44,108 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:54:44,108 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:54:44,108 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:54:44,108 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:54:44,108 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:54:44,108 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:54:44,108 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:54:44,108 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:54:44,108 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:54:44,109 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 09:54:44,109 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 09:54:44,109 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:54:44,109 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:54:44,109 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 09:54:44,110 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:54:44,110 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:54:44,110 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:54:44,110 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 09:54:44,110 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 09:54:44,110 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 09:54:44,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:54:44,110 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 09:54:44,110 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:54:44,111 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:54:44,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:54:44,111 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:54:44,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:54:44,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:54:44,111 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:54:44,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:54:44,111 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:54:44,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:54:44,112 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:54:44,112 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_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86c4ccee9690ccdd33683565314ba095e56520aa142914bd8063fc7c4c92940d [2022-12-14 09:54:44,284 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:54:44,304 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:54:44,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:54:44,308 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:54:44,308 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:54:44,309 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i [2022-12-14 09:54:46,863 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:54:47,038 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:54:47,039 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i [2022-12-14 09:54:47,047 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/data/c83a1991e/25c9a9b5bd6b47488f4d4593a6404a74/FLAG5e6c711d5 [2022-12-14 09:54:47,461 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/data/c83a1991e/25c9a9b5bd6b47488f4d4593a6404a74 [2022-12-14 09:54:47,467 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:54:47,470 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:54:47,472 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:54:47,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:54:47,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:54:47,477 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:54:47" (1/1) ... [2022-12-14 09:54:47,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4482702a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:54:47, skipping insertion in model container [2022-12-14 09:54:47,478 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:54:47" (1/1) ... [2022-12-14 09:54:47,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:54:47,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:54:47,693 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:54:47,704 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:54:47,735 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:54:47,763 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:54:47,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:54:47 WrapperNode [2022-12-14 09:54:47,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:54:47,764 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:54:47,764 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:54:47,764 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:54:47,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:54:47" (1/1) ... [2022-12-14 09:54:47,781 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:54:47" (1/1) ... [2022-12-14 09:54:47,800 INFO L138 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 88 [2022-12-14 09:54:47,800 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:54:47,801 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:54:47,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:54:47,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:54:47,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:54:47" (1/1) ... [2022-12-14 09:54:47,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:54:47" (1/1) ... [2022-12-14 09:54:47,811 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:54:47" (1/1) ... [2022-12-14 09:54:47,811 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:54:47" (1/1) ... [2022-12-14 09:54:47,815 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:54:47" (1/1) ... [2022-12-14 09:54:47,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:54:47" (1/1) ... [2022-12-14 09:54:47,819 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:54:47" (1/1) ... [2022-12-14 09:54:47,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:54:47" (1/1) ... [2022-12-14 09:54:47,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:54:47,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:54:47,822 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:54:47,822 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:54:47,823 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:54:47" (1/1) ... [2022-12-14 09:54:47,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:54:47,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:54:47,846 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:54:47,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:54:47,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 09:54:47,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 09:54:47,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 09:54:47,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 09:54:47,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:54:47,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:54:47,977 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:54:47,979 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:54:48,140 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:54:48,208 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:54:48,208 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-14 09:54:48,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:54:48 BoogieIcfgContainer [2022-12-14 09:54:48,211 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:54:48,213 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:54:48,214 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:54:48,217 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:54:48,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:54:47" (1/3) ... [2022-12-14 09:54:48,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@355c2f14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:54:48, skipping insertion in model container [2022-12-14 09:54:48,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:54:47" (2/3) ... [2022-12-14 09:54:48,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@355c2f14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:54:48, skipping insertion in model container [2022-12-14 09:54:48,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:54:48" (3/3) ... [2022-12-14 09:54:48,219 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcspn-alloca-2.i [2022-12-14 09:54:48,238 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:54:48,238 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2022-12-14 09:54:48,289 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:54:48,293 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;@3d7c9055, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:54:48,294 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-12-14 09:54:48,296 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:48,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 09:54:48,301 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:54:48,301 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 09:54:48,302 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:54:48,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:54:48,305 INFO L85 PathProgramCache]: Analyzing trace with hash 142966, now seen corresponding path program 1 times [2022-12-14 09:54:48,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:54:48,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020155871] [2022-12-14 09:54:48,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:48,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:54:48,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:48,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:48,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:54:48,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020155871] [2022-12-14 09:54:48,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020155871] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:54:48,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:54:48,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 09:54:48,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909950110] [2022-12-14 09:54:48,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:54:48,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:54:48,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:54:48,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:54:48,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:54:48,636 INFO L87 Difference]: Start difference. First operand has 29 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 28 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) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:48,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:54:48,686 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2022-12-14 09:54:48,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:54:48,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 09:54:48,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:54:48,694 INFO L225 Difference]: With dead ends: 27 [2022-12-14 09:54:48,694 INFO L226 Difference]: Without dead ends: 26 [2022-12-14 09:54:48,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:54:48,698 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:54:48,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 13 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:54:48,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-14 09:54:48,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-12-14 09:54:48,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:48,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-12-14 09:54:48,720 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 3 [2022-12-14 09:54:48,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:54:48,720 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-12-14 09:54:48,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:48,720 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-12-14 09:54:48,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 09:54:48,721 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:54:48,721 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 09:54:48,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 09:54:48,721 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:54:48,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:54:48,722 INFO L85 PathProgramCache]: Analyzing trace with hash 142967, now seen corresponding path program 1 times [2022-12-14 09:54:48,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:54:48,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498104871] [2022-12-14 09:54:48,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:48,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:54:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:48,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:48,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:54:48,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498104871] [2022-12-14 09:54:48,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498104871] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:54:48,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:54:48,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:54:48,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838136454] [2022-12-14 09:54:48,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:54:48,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:54:48,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:54:48,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:54:48,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:54:48,918 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:49,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:54:49,007 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2022-12-14 09:54:49,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:54:49,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 09:54:49,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:54:49,009 INFO L225 Difference]: With dead ends: 50 [2022-12-14 09:54:49,009 INFO L226 Difference]: Without dead ends: 50 [2022-12-14 09:54:49,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:54:49,011 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:54:49,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 40 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:54:49,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-14 09:54:49,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 28. [2022-12-14 09:54:49,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:49,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-12-14 09:54:49,017 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 3 [2022-12-14 09:54:49,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:54:49,017 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-12-14 09:54:49,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:49,018 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-12-14 09:54:49,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 09:54:49,018 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:54:49,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 09:54:49,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 09:54:49,019 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:54:49,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:54:49,020 INFO L85 PathProgramCache]: Analyzing trace with hash 4518975, now seen corresponding path program 1 times [2022-12-14 09:54:49,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:54:49,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22960316] [2022-12-14 09:54:49,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:49,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:54:49,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:49,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:49,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:54:49,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22960316] [2022-12-14 09:54:49,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22960316] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:54:49,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:54:49,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 09:54:49,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414652626] [2022-12-14 09:54:49,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:54:49,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:54:49,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:54:49,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:54:49,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:54:49,070 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:49,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:54:49,093 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-12-14 09:54:49,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:54:49,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 09:54:49,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:54:49,094 INFO L225 Difference]: With dead ends: 26 [2022-12-14 09:54:49,094 INFO L226 Difference]: Without dead ends: 26 [2022-12-14 09:54:49,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:54:49,096 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:54:49,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 13 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:54:49,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-14 09:54:49,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-12-14 09:54:49,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:49,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-12-14 09:54:49,100 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 4 [2022-12-14 09:54:49,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:54:49,100 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-12-14 09:54:49,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:49,100 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-12-14 09:54:49,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 09:54:49,101 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:54:49,101 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 09:54:49,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 09:54:49,101 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:54:49,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:54:49,102 INFO L85 PathProgramCache]: Analyzing trace with hash 4518976, now seen corresponding path program 1 times [2022-12-14 09:54:49,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:54:49,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216685198] [2022-12-14 09:54:49,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:49,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:54:49,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:49,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:49,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:54:49,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216685198] [2022-12-14 09:54:49,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216685198] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:54:49,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:54:49,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:54:49,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309819311] [2022-12-14 09:54:49,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:54:49,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:54:49,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:54:49,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:54:49,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:54:49,239 INFO L87 Difference]: Start difference. First operand 26 states and 30 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) [2022-12-14 09:54:49,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:54:49,316 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2022-12-14 09:54:49,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:54:49,317 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 [2022-12-14 09:54:49,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:54:49,318 INFO L225 Difference]: With dead ends: 45 [2022-12-14 09:54:49,318 INFO L226 Difference]: Without dead ends: 45 [2022-12-14 09:54:49,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:54:49,319 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:54:49,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 33 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:54:49,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-14 09:54:49,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2022-12-14 09:54:49,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.736842105263158) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:49,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-12-14 09:54:49,324 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 4 [2022-12-14 09:54:49,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:54:49,324 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-12-14 09:54:49,324 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) [2022-12-14 09:54:49,324 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-12-14 09:54:49,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 09:54:49,325 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:54:49,325 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 09:54:49,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 09:54:49,325 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:54:49,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:54:49,326 INFO L85 PathProgramCache]: Analyzing trace with hash 4521093, now seen corresponding path program 1 times [2022-12-14 09:54:49,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:54:49,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218244381] [2022-12-14 09:54:49,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:49,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:54:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:49,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:49,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:54:49,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218244381] [2022-12-14 09:54:49,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218244381] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:54:49,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:54:49,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:54:49,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76454238] [2022-12-14 09:54:49,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:54:49,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:54:49,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:54:49,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:54:49,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:54:49,513 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:49,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:54:49,540 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-12-14 09:54:49,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:54:49,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 09:54:49,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:54:49,541 INFO L225 Difference]: With dead ends: 27 [2022-12-14 09:54:49,541 INFO L226 Difference]: Without dead ends: 27 [2022-12-14 09:54:49,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:54:49,542 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:54:49,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 11 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:54:49,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-14 09:54:49,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-12-14 09:54:49,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:49,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-12-14 09:54:49,545 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 4 [2022-12-14 09:54:49,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:54:49,545 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-12-14 09:54:49,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:49,545 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-12-14 09:54:49,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 09:54:49,546 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:54:49,546 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 09:54:49,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 09:54:49,546 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:54:49,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:54:49,546 INFO L85 PathProgramCache]: Analyzing trace with hash 140153877, now seen corresponding path program 1 times [2022-12-14 09:54:49,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:54:49,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390554493] [2022-12-14 09:54:49,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:49,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:54:49,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:49,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:49,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:54:49,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390554493] [2022-12-14 09:54:49,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390554493] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:54:49,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:54:49,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:54:49,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551558172] [2022-12-14 09:54:49,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:54:49,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:54:49,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:54:49,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:54:49,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:54:49,683 INFO L87 Difference]: Start difference. First operand 27 states and 32 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) [2022-12-14 09:54:49,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:54:49,707 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2022-12-14 09:54:49,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:54:49,708 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 [2022-12-14 09:54:49,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:54:49,708 INFO L225 Difference]: With dead ends: 26 [2022-12-14 09:54:49,708 INFO L226 Difference]: Without dead ends: 26 [2022-12-14 09:54:49,709 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 [2022-12-14 09:54:49,709 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:54:49,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 11 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:54:49,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-14 09:54:49,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-12-14 09:54:49,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.631578947368421) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:49,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-12-14 09:54:49,711 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 5 [2022-12-14 09:54:49,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:54:49,712 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-12-14 09:54:49,712 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) [2022-12-14 09:54:49,712 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-12-14 09:54:49,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 09:54:49,712 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:54:49,712 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2022-12-14 09:54:49,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 09:54:49,713 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:54:49,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:54:49,713 INFO L85 PathProgramCache]: Analyzing trace with hash 137465062, now seen corresponding path program 1 times [2022-12-14 09:54:49,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:54:49,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992103887] [2022-12-14 09:54:49,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:49,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:54:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:49,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:49,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:54:49,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992103887] [2022-12-14 09:54:49,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992103887] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:54:49,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503463895] [2022-12-14 09:54:49,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:49,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:54:49,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:54:49,874 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:54:49,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 09:54:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:49,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 09:54:49,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:54:50,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:50,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-12-14 09:54:50,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-14 09:54:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:50,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:54:50,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:50,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503463895] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:54:50,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [753969183] [2022-12-14 09:54:50,264 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-12-14 09:54:50,264 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:54:50,268 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:54:50,273 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:54:50,273 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:54:50,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:50,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:54:50,370 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 11 treesize of output 7 [2022-12-14 09:54:50,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:54:50,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:54:50,510 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:54:50,777 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '457#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (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) (<= |ULTIMATE.start_main_#t~nondet11#1| 127) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet11#1|)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 09:54:50,777 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:54:50,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:54:50,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-12-14 09:54:50,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393012250] [2022-12-14 09:54:50,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:54:50,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 09:54:50,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:54:50,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 09:54:50,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-12-14 09:54:50,779 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:51,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:54:51,026 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2022-12-14 09:54:51,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:54:51,027 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 09:54:51,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:54:51,028 INFO L225 Difference]: With dead ends: 66 [2022-12-14 09:54:51,028 INFO L226 Difference]: Without dead ends: 66 [2022-12-14 09:54:51,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-12-14 09:54:51,028 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 149 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:54:51,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 88 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:54:51,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-12-14 09:54:51,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 23. [2022-12-14 09:54:51,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:51,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-12-14 09:54:51,031 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 5 [2022-12-14 09:54:51,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:54:51,031 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-12-14 09:54:51,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:51,031 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-12-14 09:54:51,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 09:54:51,031 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:54:51,031 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-12-14 09:54:51,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 09:54:51,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:54:51,232 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:54:51,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:54:51,233 INFO L85 PathProgramCache]: Analyzing trace with hash 47830498, now seen corresponding path program 1 times [2022-12-14 09:54:51,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:54:51,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804607610] [2022-12-14 09:54:51,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:51,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:54:51,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:51,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:51,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:54:51,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804607610] [2022-12-14 09:54:51,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804607610] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:54:51,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929767169] [2022-12-14 09:54:51,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:51,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:54:51,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:54:51,365 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:54:51,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 09:54:51,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:51,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 09:54:51,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:54:51,439 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-14 09:54:51,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2022-12-14 09:54:51,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:51,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:54:51,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:51,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929767169] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:54:51,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1997736888] [2022-12-14 09:54:51,693 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-12-14 09:54:51,693 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:54:51,693 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:54:51,694 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:54:51,694 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:54:51,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:51,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:54:51,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:54:51,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:54:51,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:54:51,865 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:54:52,262 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '601#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (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_#t~nondet13#1| 127) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet13#1|)) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 09:54:52,262 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:54:52,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:54:52,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2022-12-14 09:54:52,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426143484] [2022-12-14 09:54:52,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:54:52,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 09:54:52,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:54:52,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 09:54:52,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-12-14 09:54:52,264 INFO L87 Difference]: Start difference. First operand 23 states and 27 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) [2022-12-14 09:54:52,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:54:52,460 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2022-12-14 09:54:52,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:54:52,460 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 [2022-12-14 09:54:52,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:54:52,460 INFO L225 Difference]: With dead ends: 53 [2022-12-14 09:54:52,461 INFO L226 Difference]: Without dead ends: 53 [2022-12-14 09:54:52,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2022-12-14 09:54:52,461 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 107 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:54:52,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 126 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:54:52,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-12-14 09:54:52,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 20. [2022-12-14 09:54:52,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:52,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-12-14 09:54:52,463 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 6 [2022-12-14 09:54:52,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:54:52,463 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-12-14 09:54:52,463 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) [2022-12-14 09:54:52,463 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-12-14 09:54:52,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 09:54:52,464 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:54:52,464 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:54:52,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 09:54:52,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 09:54:52,665 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:54:52,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:54:52,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1543939753, now seen corresponding path program 1 times [2022-12-14 09:54:52,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:54:52,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612896545] [2022-12-14 09:54:52,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:52,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:54:52,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:52,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:52,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:54:52,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612896545] [2022-12-14 09:54:52,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612896545] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:54:52,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:54:52,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:54:52,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511845797] [2022-12-14 09:54:52,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:54:52,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:54:52,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:54:52,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:54:52,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:54:52,755 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:52,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:54:52,789 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2022-12-14 09:54:52,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:54:52,790 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 09:54:52,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:54:52,790 INFO L225 Difference]: With dead ends: 19 [2022-12-14 09:54:52,790 INFO L226 Difference]: Without dead ends: 19 [2022-12-14 09:54:52,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:54:52,791 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:54:52,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 19 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:54:52,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-12-14 09:54:52,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-12-14 09:54:52,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:52,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-12-14 09:54:52,793 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 7 [2022-12-14 09:54:52,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:54:52,794 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-12-14 09:54:52,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:52,794 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-12-14 09:54:52,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 09:54:52,794 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:54:52,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:54:52,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 09:54:52,795 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:54:52,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:54:52,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1543939754, now seen corresponding path program 1 times [2022-12-14 09:54:52,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:54:52,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612679714] [2022-12-14 09:54:52,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:52,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:54:52,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:52,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:52,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:54:52,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612679714] [2022-12-14 09:54:52,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612679714] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:54:52,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:54:52,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:54:52,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547959591] [2022-12-14 09:54:52,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:54:52,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:54:52,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:54:52,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:54:52,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:54:52,919 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:53,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:54:53,007 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-12-14 09:54:53,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:54:53,007 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 09:54:53,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:54:53,007 INFO L225 Difference]: With dead ends: 21 [2022-12-14 09:54:53,008 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 09:54:53,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-14 09:54:53,008 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 43 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:54:53,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 26 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:54:53,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 09:54:53,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-12-14 09:54:53,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.411764705882353) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:53,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-12-14 09:54:53,010 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 7 [2022-12-14 09:54:53,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:54:53,010 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-12-14 09:54:53,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:53,011 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-12-14 09:54:53,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 09:54:53,011 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:54:53,011 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:54:53,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 09:54:53,011 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:54:53,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:54:53,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1962424369, now seen corresponding path program 1 times [2022-12-14 09:54:53,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:54:53,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922974498] [2022-12-14 09:54:53,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:53,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:54:53,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:53,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:53,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:54:53,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922974498] [2022-12-14 09:54:53,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922974498] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:54:53,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:54:53,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:54:53,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614298552] [2022-12-14 09:54:53,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:54:53,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:54:53,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:54:53,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:54:53,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:54:53,053 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:53,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:54:53,088 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-12-14 09:54:53,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:54:53,088 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 09:54:53,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:54:53,088 INFO L225 Difference]: With dead ends: 20 [2022-12-14 09:54:53,089 INFO L226 Difference]: Without dead ends: 20 [2022-12-14 09:54:53,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:54:53,089 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:54:53,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 23 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:54:53,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-14 09:54:53,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-12-14 09:54:53,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:53,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-12-14 09:54:53,092 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 9 [2022-12-14 09:54:53,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:54:53,092 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-12-14 09:54:53,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:53,092 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-12-14 09:54:53,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 09:54:53,092 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:54:53,093 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:54:53,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 09:54:53,093 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:54:53,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:54:53,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1962424370, now seen corresponding path program 1 times [2022-12-14 09:54:53,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:54:53,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974047433] [2022-12-14 09:54:53,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:53,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:54:53,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:53,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:53,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:54:53,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974047433] [2022-12-14 09:54:53,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974047433] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:54:53,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:54:53,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:54:53,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635884746] [2022-12-14 09:54:53,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:54:53,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:54:53,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:54:53,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:54:53,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:54:53,196 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:53,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:54:53,247 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2022-12-14 09:54:53,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:54:53,247 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 09:54:53,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:54:53,248 INFO L225 Difference]: With dead ends: 23 [2022-12-14 09:54:53,248 INFO L226 Difference]: Without dead ends: 23 [2022-12-14 09:54:53,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-14 09:54:53,249 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 37 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:54:53,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 28 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:54:53,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-14 09:54:53,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-12-14 09:54:53,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:53,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-12-14 09:54:53,251 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 9 [2022-12-14 09:54:53,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:54:53,251 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-12-14 09:54:53,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:53,252 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-12-14 09:54:53,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 09:54:53,252 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:54:53,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:54:53,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 09:54:53,252 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:54:53,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:54:53,253 INFO L85 PathProgramCache]: Analyzing trace with hash -509512412, now seen corresponding path program 1 times [2022-12-14 09:54:53,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:54:53,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470735721] [2022-12-14 09:54:53,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:53,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:54:53,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:53,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:53,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:54:53,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470735721] [2022-12-14 09:54:53,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470735721] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:54:53,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:54:53,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:54:53,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482130073] [2022-12-14 09:54:53,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:54:53,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:54:53,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:54:53,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:54:53,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:54:53,368 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:53,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:54:53,388 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-12-14 09:54:53,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:54:53,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 09:54:53,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:54:53,388 INFO L225 Difference]: With dead ends: 21 [2022-12-14 09:54:53,389 INFO L226 Difference]: Without dead ends: 19 [2022-12-14 09:54:53,389 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 [2022-12-14 09:54:53,389 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:54:53,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 20 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:54:53,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-12-14 09:54:53,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-12-14 09:54:53,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:53,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-12-14 09:54:53,392 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 12 [2022-12-14 09:54:53,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:54:53,392 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-12-14 09:54:53,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:53,392 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-12-14 09:54:53,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 09:54:53,392 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:54:53,393 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:54:53,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 09:54:53,393 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:54:53,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:54:53,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1385034421, now seen corresponding path program 1 times [2022-12-14 09:54:53,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:54:53,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545966723] [2022-12-14 09:54:53,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:53,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:54:53,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:53,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:53,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:54:53,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545966723] [2022-12-14 09:54:53,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545966723] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:54:53,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:54:53,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 09:54:53,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585389867] [2022-12-14 09:54:53,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:54:53,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 09:54:53,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:54:53,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 09:54:53,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-14 09:54:53,579 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 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) [2022-12-14 09:54:53,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:54:53,690 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-12-14 09:54:53,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 09:54:53,691 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 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 [2022-12-14 09:54:53,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:54:53,691 INFO L225 Difference]: With dead ends: 34 [2022-12-14 09:54:53,691 INFO L226 Difference]: Without dead ends: 34 [2022-12-14 09:54:53,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-12-14 09:54:53,692 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 27 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:54:53,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 54 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:54:53,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-12-14 09:54:53,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-12-14 09:54:53,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.2666666666666666) 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) [2022-12-14 09:54:53,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-12-14 09:54:53,695 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 13 [2022-12-14 09:54:53,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:54:53,695 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-12-14 09:54:53,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 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) [2022-12-14 09:54:53,695 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-12-14 09:54:53,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 09:54:53,696 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:54:53,696 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:54:53,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 09:54:53,696 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:54:53,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:54:53,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1385036599, now seen corresponding path program 1 times [2022-12-14 09:54:53,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:54:53,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554559738] [2022-12-14 09:54:53,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:53,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:54:53,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:53,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:54:53,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554559738] [2022-12-14 09:54:53,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554559738] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:54:53,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:54:53,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 09:54:53,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856815578] [2022-12-14 09:54:53,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:54:53,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 09:54:53,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:54:53,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 09:54:53,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-12-14 09:54:53,854 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 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) [2022-12-14 09:54:53,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:54:53,957 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2022-12-14 09:54:53,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 09:54:53,957 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 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 [2022-12-14 09:54:53,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:54:53,958 INFO L225 Difference]: With dead ends: 59 [2022-12-14 09:54:53,958 INFO L226 Difference]: Without dead ends: 51 [2022-12-14 09:54:53,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2022-12-14 09:54:53,959 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 52 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:54:53,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 54 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:54:53,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-12-14 09:54:53,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2022-12-14 09:54:53,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 43 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) [2022-12-14 09:54:53,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-12-14 09:54:53,962 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 13 [2022-12-14 09:54:53,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:54:53,962 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-12-14 09:54:53,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 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) [2022-12-14 09:54:53,962 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-12-14 09:54:53,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 09:54:53,962 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:54:53,963 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:54:53,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 09:54:53,963 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:54:53,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:54:53,963 INFO L85 PathProgramCache]: Analyzing trace with hash 425709525, now seen corresponding path program 1 times [2022-12-14 09:54:53,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:54:53,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640417862] [2022-12-14 09:54:53,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:53,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:54:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:54,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:54,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:54:54,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640417862] [2022-12-14 09:54:54,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640417862] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:54:54,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199615712] [2022-12-14 09:54:54,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:54,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:54:54,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:54:54,214 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:54:54,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 09:54:54,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:54,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 09:54:54,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:54:54,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:54,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:54:54,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 09:54:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:54,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199615712] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:54:54,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1501864605] [2022-12-14 09:54:54,488 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:54:54,488 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:54:54,488 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:54:54,489 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:54:54,489 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:54:54,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:54,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:54:54,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:54:54,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:54:54,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:54:54,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:54:54,743 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:54:54,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:54:55,051 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:54:56,470 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1254#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 09:54:56,470 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:54:56,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:54:56,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-12-14 09:54:56,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041522943] [2022-12-14 09:54:56,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:54:56,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 09:54:56,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:54:56,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 09:54:56,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 09:54:56,472 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 21 states, 20 states have (on average 1.75) internal successors, (35), 21 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) [2022-12-14 09:54:56,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:54:56,707 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-12-14 09:54:56,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 09:54:56,707 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.75) internal successors, (35), 21 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) Word has length 15 [2022-12-14 09:54:56,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:54:56,708 INFO L225 Difference]: With dead ends: 60 [2022-12-14 09:54:56,708 INFO L226 Difference]: Without dead ends: 60 [2022-12-14 09:54:56,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=220, Invalid=1420, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 09:54:56,708 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 124 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:54:56,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 73 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:54:56,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-14 09:54:56,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2022-12-14 09:54:56,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 50 states have (on average 1.22) internal successors, (61), 51 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:56,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2022-12-14 09:54:56,710 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 15 [2022-12-14 09:54:56,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:54:56,711 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2022-12-14 09:54:56,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.75) internal successors, (35), 21 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) [2022-12-14 09:54:56,711 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2022-12-14 09:54:56,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 09:54:56,711 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:54:56,711 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:54:56,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 09:54:56,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 09:54:56,913 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:54:56,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:54:56,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1261874588, now seen corresponding path program 1 times [2022-12-14 09:54:56,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:54:56,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465776029] [2022-12-14 09:54:56,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:56,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:54:56,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:57,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:54:57,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465776029] [2022-12-14 09:54:57,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465776029] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:54:57,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378568762] [2022-12-14 09:54:57,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:57,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:54:57,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:54:57,092 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:54:57,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 09:54:57,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:57,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 09:54:57,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:54:57,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:57,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:54:57,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 09:54:57,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:57,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378568762] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:54:57,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [800590559] [2022-12-14 09:54:57,379 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:54:57,379 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:54:57,380 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:54:57,380 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:54:57,380 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:54:57,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:57,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:54:57,433 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 11 treesize of output 7 [2022-12-14 09:54:57,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:54:57,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:54:57,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:54:57,587 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:54:57,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:54:58,073 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:54:59,615 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1498#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 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_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 09:54:59,615 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:54:59,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:54:59,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-12-14 09:54:59,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066266193] [2022-12-14 09:54:59,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:54:59,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 09:54:59,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:54:59,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 09:54:59,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2022-12-14 09:54:59,616 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:59,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:54:59,788 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2022-12-14 09:54:59,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 09:54:59,788 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 09:54:59,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:54:59,789 INFO L225 Difference]: With dead ends: 73 [2022-12-14 09:54:59,789 INFO L226 Difference]: Without dead ends: 73 [2022-12-14 09:54:59,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=190, Invalid=1216, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 09:54:59,789 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 142 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:54:59,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 96 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:54:59,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-12-14 09:54:59,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2022-12-14 09:54:59,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 68 states have (on average 1.2058823529411764) internal successors, (82), 69 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:59,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2022-12-14 09:54:59,792 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 15 [2022-12-14 09:54:59,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:54:59,792 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2022-12-14 09:54:59,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:59,792 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2022-12-14 09:54:59,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 09:54:59,792 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:54:59,792 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:54:59,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 09:54:59,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:54:59,994 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:54:59,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:54:59,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1001715366, now seen corresponding path program 2 times [2022-12-14 09:54:59,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:54:59,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424338727] [2022-12-14 09:54:59,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:59,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:55:00,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:00,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:55:00,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424338727] [2022-12-14 09:55:00,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424338727] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:55:00,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251294974] [2022-12-14 09:55:00,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:55:00,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:55:00,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:55:00,275 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:55:00,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 09:55:00,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 09:55:00,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:55:00,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-14 09:55:00,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:00,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:55:00,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 09:55:00,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:00,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:55:00,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-14 09:55:00,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:55:00,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:00,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251294974] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:55:00,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1972940769] [2022-12-14 09:55:00,575 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:55:00,575 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:55:00,575 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:55:00,576 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:55:00,576 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:55:00,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:00,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:55:00,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:55:00,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:55:00,678 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 [2022-12-14 09:55:00,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:55:00,749 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:55:00,750 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 25 treesize of output 24 [2022-12-14 09:55:01,038 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:55:02,777 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1796#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 09:55:02,777 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:55:02,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:55:02,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 23 [2022-12-14 09:55:02,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984898454] [2022-12-14 09:55:02,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:55:02,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 09:55:02,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:55:02,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 09:55:02,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 09:55:02,778 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:03,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:55:03,236 INFO L93 Difference]: Finished difference Result 119 states and 133 transitions. [2022-12-14 09:55:03,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 09:55:03,237 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 09:55:03,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:55:03,238 INFO L225 Difference]: With dead ends: 119 [2022-12-14 09:55:03,238 INFO L226 Difference]: Without dead ends: 107 [2022-12-14 09:55:03,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=384, Invalid=2166, Unknown=0, NotChecked=0, Total=2550 [2022-12-14 09:55:03,239 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 166 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:55:03,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 133 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:55:03,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-12-14 09:55:03,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 98. [2022-12-14 09:55:03,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 96 states have (on average 1.1875) internal successors, (114), 97 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) [2022-12-14 09:55:03,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 114 transitions. [2022-12-14 09:55:03,244 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 114 transitions. Word has length 19 [2022-12-14 09:55:03,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:55:03,245 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 114 transitions. [2022-12-14 09:55:03,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:03,245 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 114 transitions. [2022-12-14 09:55:03,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 09:55:03,246 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:55:03,246 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:55:03,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 09:55:03,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 09:55:03,448 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:55:03,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:55:03,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1182371976, now seen corresponding path program 3 times [2022-12-14 09:55:03,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:55:03,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279570786] [2022-12-14 09:55:03,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:03,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:55:03,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:03,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:03,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:55:03,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279570786] [2022-12-14 09:55:03,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279570786] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:55:03,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392066323] [2022-12-14 09:55:03,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:55:03,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:55:03,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:55:03,695 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:55:03,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 09:55:03,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:55:03,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:55:03,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-14 09:55:03,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:03,767 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 09:55:03,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 09:55:03,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:03,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:55:04,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:04,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392066323] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:55:04,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1477601165] [2022-12-14 09:55:04,042 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:55:04,042 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:55:04,042 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:55:04,042 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:55:04,042 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:55:04,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:04,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:55:04,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:55:04,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:55:04,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:55:04,174 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 [2022-12-14 09:55:04,214 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:55:04,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:55:04,705 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:55:06,504 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2204#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 09:55:06,504 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:55:06,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:55:06,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-12-14 09:55:06,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068032515] [2022-12-14 09:55:06,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:55:06,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 09:55:06,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:55:06,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 09:55:06,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1314, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 09:55:06,505 INFO L87 Difference]: Start difference. First operand 98 states and 114 transitions. Second operand has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:06,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:55:06,785 INFO L93 Difference]: Finished difference Result 125 states and 141 transitions. [2022-12-14 09:55:06,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 09:55:06,786 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 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 [2022-12-14 09:55:06,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:55:06,786 INFO L225 Difference]: With dead ends: 125 [2022-12-14 09:55:06,786 INFO L226 Difference]: Without dead ends: 125 [2022-12-14 09:55:06,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=356, Invalid=2094, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 09:55:06,787 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 186 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:55:06,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 168 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:55:06,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-12-14 09:55:06,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 110. [2022-12-14 09:55:06,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 108 states have (on average 1.1851851851851851) internal successors, (128), 109 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) [2022-12-14 09:55:06,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 128 transitions. [2022-12-14 09:55:06,789 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 128 transitions. Word has length 21 [2022-12-14 09:55:06,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:55:06,790 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 128 transitions. [2022-12-14 09:55:06,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:06,790 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 128 transitions. [2022-12-14 09:55:06,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 09:55:06,790 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:55:06,790 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:55:06,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 09:55:06,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:55:06,991 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:55:06,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:55:06,992 INFO L85 PathProgramCache]: Analyzing trace with hash -894735633, now seen corresponding path program 2 times [2022-12-14 09:55:06,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:55:06,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513688309] [2022-12-14 09:55:06,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:06,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:55:07,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:07,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:55:07,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513688309] [2022-12-14 09:55:07,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513688309] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:55:07,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939282996] [2022-12-14 09:55:07,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:55:07,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:55:07,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:55:07,405 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:55:07,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 09:55:07,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 09:55:07,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:55:07,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-14 09:55:07,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:07,493 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-14 09:55:07,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2022-12-14 09:55:07,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:55:07,703 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 09:55:07,703 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 16 treesize of output 22 [2022-12-14 09:55:07,710 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 3 [2022-12-14 09:55:08,209 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 09:55:08,209 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 74 treesize of output 67 [2022-12-14 09:55:08,220 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 09:55:08,220 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 66 treesize of output 54 [2022-12-14 09:55:08,236 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:08,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:55:08,412 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:55:08,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 09:55:08,419 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:55:08,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-14 09:55:08,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:55:08,766 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:08,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939282996] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:55:08,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2084818888] [2022-12-14 09:55:08,768 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:55:08,768 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:55:08,768 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:55:08,768 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:55:08,768 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:55:08,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:08,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:55:08,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:55:08,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:55:08,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:55:08,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:55:08,942 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:55:08,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:55:09,308 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:55:11,488 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2624#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 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_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 09:55:11,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:55:11,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:55:11,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-12-14 09:55:11,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808758720] [2022-12-14 09:55:11,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:55:11,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 09:55:11,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:55:11,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 09:55:11,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1671, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 09:55:11,490 INFO L87 Difference]: Start difference. First operand 110 states and 128 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:13,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:55:13,987 INFO L93 Difference]: Finished difference Result 191 states and 214 transitions. [2022-12-14 09:55:13,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-14 09:55:13,988 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-14 09:55:13,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:55:13,988 INFO L225 Difference]: With dead ends: 191 [2022-12-14 09:55:13,988 INFO L226 Difference]: Without dead ends: 155 [2022-12-14 09:55:13,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=561, Invalid=4131, Unknown=0, NotChecked=0, Total=4692 [2022-12-14 09:55:13,989 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 301 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 09:55:13,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 241 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 09:55:13,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-12-14 09:55:13,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 135. [2022-12-14 09:55:13,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 133 states have (on average 1.1954887218045114) internal successors, (159), 134 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:13,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 159 transitions. [2022-12-14 09:55:13,992 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 159 transitions. Word has length 21 [2022-12-14 09:55:13,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:55:13,992 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 159 transitions. [2022-12-14 09:55:13,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:13,992 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 159 transitions. [2022-12-14 09:55:13,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 09:55:13,993 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:55:13,993 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 09:55:13,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 09:55:14,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:55:14,195 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:55:14,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:55:14,196 INFO L85 PathProgramCache]: Analyzing trace with hash -2116047970, now seen corresponding path program 3 times [2022-12-14 09:55:14,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:55:14,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703993374] [2022-12-14 09:55:14,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:14,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:55:14,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:14,359 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:14,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:55:14,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703993374] [2022-12-14 09:55:14,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703993374] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:55:14,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901492466] [2022-12-14 09:55:14,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:55:14,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:55:14,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:55:14,360 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:55:14,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 09:55:14,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:55:14,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:55:14,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 09:55:14,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:14,502 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:14,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:55:14,614 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 5 treesize of output 3 [2022-12-14 09:55:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:14,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901492466] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:55:14,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1108824378] [2022-12-14 09:55:14,633 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:55:14,633 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:55:14,633 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:55:14,633 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:55:14,633 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:55:14,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:14,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:55:14,687 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 [2022-12-14 09:55:14,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:55:14,731 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 [2022-12-14 09:55:14,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:55:14,799 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:55:14,799 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 [2022-12-14 09:55:15,165 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:55:17,136 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3165#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 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_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 09:55:17,136 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:55:17,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:55:17,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-12-14 09:55:17,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870495709] [2022-12-14 09:55:17,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:55:17,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 09:55:17,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:55:17,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 09:55:17,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2022-12-14 09:55:17,138 INFO L87 Difference]: Start difference. First operand 135 states and 159 transitions. Second operand has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) [2022-12-14 09:55:17,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:55:17,391 INFO L93 Difference]: Finished difference Result 187 states and 213 transitions. [2022-12-14 09:55:17,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 09:55:17,391 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) Word has length 23 [2022-12-14 09:55:17,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:55:17,392 INFO L225 Difference]: With dead ends: 187 [2022-12-14 09:55:17,392 INFO L226 Difference]: Without dead ends: 187 [2022-12-14 09:55:17,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=189, Invalid=1293, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 09:55:17,393 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 133 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:55:17,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 182 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:55:17,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-12-14 09:55:17,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 167. [2022-12-14 09:55:17,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 165 states have (on average 1.187878787878788) internal successors, (196), 166 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:17,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 196 transitions. [2022-12-14 09:55:17,397 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 196 transitions. Word has length 23 [2022-12-14 09:55:17,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:55:17,397 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 196 transitions. [2022-12-14 09:55:17,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) [2022-12-14 09:55:17,397 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 196 transitions. [2022-12-14 09:55:17,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 09:55:17,398 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:55:17,398 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:55:17,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 09:55:17,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 09:55:17,600 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:55:17,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:55:17,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1425858691, now seen corresponding path program 4 times [2022-12-14 09:55:17,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:55:17,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56059969] [2022-12-14 09:55:17,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:17,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:55:17,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:17,873 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:17,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:55:17,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56059969] [2022-12-14 09:55:17,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56059969] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:55:17,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349581208] [2022-12-14 09:55:17,874 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:55:17,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:55:17,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:55:17,875 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:55:17,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 09:55:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:17,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-14 09:55:17,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:18,019 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 [2022-12-14 09:55:18,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:55:18,294 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:55:18,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-12-14 09:55:18,298 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:18,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:55:18,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-14 09:55:18,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-14 09:55:18,560 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:18,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349581208] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:55:18,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [798840614] [2022-12-14 09:55:18,561 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:55:18,561 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:55:18,561 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:55:18,561 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:55:18,561 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:55:18,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:18,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:55:18,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:55:18,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:55:18,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:55:18,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:55:18,717 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:55:18,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:55:18,936 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:55:20,911 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3726#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 09:55:20,911 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:55:20,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:55:20,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-12-14 09:55:20,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622342436] [2022-12-14 09:55:20,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:55:20,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 09:55:20,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:55:20,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 09:55:20,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1965, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 09:55:20,913 INFO L87 Difference]: Start difference. First operand 167 states and 196 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:21,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:55:21,751 INFO L93 Difference]: Finished difference Result 283 states and 320 transitions. [2022-12-14 09:55:21,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 09:55:21,752 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-14 09:55:21,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:55:21,753 INFO L225 Difference]: With dead ends: 283 [2022-12-14 09:55:21,753 INFO L226 Difference]: Without dead ends: 243 [2022-12-14 09:55:21,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=521, Invalid=3769, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 09:55:21,756 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 200 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:55:21,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 419 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:55:21,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-12-14 09:55:21,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 219. [2022-12-14 09:55:21,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 217 states have (on average 1.1797235023041475) internal successors, (256), 218 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:21,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 256 transitions. [2022-12-14 09:55:21,759 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 256 transitions. Word has length 25 [2022-12-14 09:55:21,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:55:21,759 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 256 transitions. [2022-12-14 09:55:21,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:21,760 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 256 transitions. [2022-12-14 09:55:21,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 09:55:21,761 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:55:21,761 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:55:21,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 09:55:21,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:55:21,962 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:55:21,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:55:21,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1989474075, now seen corresponding path program 5 times [2022-12-14 09:55:21,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:55:21,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793629203] [2022-12-14 09:55:21,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:21,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:55:22,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:22,228 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:22,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:55:22,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793629203] [2022-12-14 09:55:22,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793629203] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:55:22,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382593508] [2022-12-14 09:55:22,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:55:22,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:55:22,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:55:22,229 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:55:22,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 09:55:22,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 09:55:22,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:55:22,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-14 09:55:22,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:22,306 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 09:55:22,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 09:55:22,453 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:22,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:55:22,666 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:22,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382593508] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:55:22,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [333227978] [2022-12-14 09:55:22,667 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:55:22,667 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:55:22,668 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:55:22,668 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:55:22,668 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:55:22,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:22,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:55:22,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:55:22,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:55:22,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:55:22,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:55:22,839 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:55:22,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:55:23,045 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:55:24,568 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4470#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 09:55:24,568 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:55:24,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:55:24,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 35 [2022-12-14 09:55:24,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753095187] [2022-12-14 09:55:24,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:55:24,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 09:55:24,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:55:24,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 09:55:24,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=2022, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 09:55:24,570 INFO L87 Difference]: Start difference. First operand 219 states and 256 transitions. Second operand has 36 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:25,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:55:25,028 INFO L93 Difference]: Finished difference Result 274 states and 312 transitions. [2022-12-14 09:55:25,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 09:55:25,029 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 36 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 27 [2022-12-14 09:55:25,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:55:25,031 INFO L225 Difference]: With dead ends: 274 [2022-12-14 09:55:25,031 INFO L226 Difference]: Without dead ends: 274 [2022-12-14 09:55:25,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=541, Invalid=3241, Unknown=0, NotChecked=0, Total=3782 [2022-12-14 09:55:25,033 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 250 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:55:25,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 276 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:55:25,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-12-14 09:55:25,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 239. [2022-12-14 09:55:25,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 237 states have (on average 1.1814345991561181) internal successors, (280), 238 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:25,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 280 transitions. [2022-12-14 09:55:25,038 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 280 transitions. Word has length 27 [2022-12-14 09:55:25,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:55:25,038 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 280 transitions. [2022-12-14 09:55:25,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:25,038 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 280 transitions. [2022-12-14 09:55:25,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 09:55:25,038 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:55:25,038 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 09:55:25,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 09:55:25,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:55:25,240 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:55:25,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:55:25,241 INFO L85 PathProgramCache]: Analyzing trace with hash -167481175, now seen corresponding path program 4 times [2022-12-14 09:55:25,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:55:25,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229446474] [2022-12-14 09:55:25,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:25,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:55:25,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:25,598 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:25,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:55:25,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229446474] [2022-12-14 09:55:25,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229446474] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:55:25,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900588977] [2022-12-14 09:55:25,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:55:25,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:55:25,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:55:25,600 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:55:25,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 09:55:25,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:25,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-14 09:55:25,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:25,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-14 09:55:25,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:55:25,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 09:55:26,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:55:26,105 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:55:26,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-12-14 09:55:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:26,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:55:26,241 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:55:26,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 09:55:26,245 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:55:26,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2022-12-14 09:55:26,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:55:26,484 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:26,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900588977] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:55:26,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [923503655] [2022-12-14 09:55:26,486 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:55:26,486 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:55:26,486 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:55:26,486 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:55:26,486 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:55:26,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:26,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:55:26,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:55:26,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:55:26,591 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 [2022-12-14 09:55:26,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:55:26,675 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:55:26,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:55:27,043 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:55:29,385 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5225#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 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_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 09:55:29,385 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:55:29,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:55:29,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 33 [2022-12-14 09:55:29,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555717537] [2022-12-14 09:55:29,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:55:29,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 09:55:29,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:55:29,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 09:55:29,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1917, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 09:55:29,386 INFO L87 Difference]: Start difference. First operand 239 states and 280 transitions. Second operand has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:30,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:55:30,079 INFO L93 Difference]: Finished difference Result 432 states and 488 transitions. [2022-12-14 09:55:30,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 09:55:30,080 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-12-14 09:55:30,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:55:30,081 INFO L225 Difference]: With dead ends: 432 [2022-12-14 09:55:30,081 INFO L226 Difference]: Without dead ends: 336 [2022-12-14 09:55:30,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=359, Invalid=3301, Unknown=0, NotChecked=0, Total=3660 [2022-12-14 09:55:30,082 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 204 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:55:30,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 422 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:55:30,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-12-14 09:55:30,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 270. [2022-12-14 09:55:30,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 268 states have (on average 1.1865671641791045) internal successors, (318), 269 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:30,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 318 transitions. [2022-12-14 09:55:30,088 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 318 transitions. Word has length 29 [2022-12-14 09:55:30,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:55:30,089 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 318 transitions. [2022-12-14 09:55:30,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:30,089 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 318 transitions. [2022-12-14 09:55:30,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 09:55:30,089 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:55:30,090 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:55:30,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 09:55:30,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:55:30,291 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:55:30,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:55:30,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1469112928, now seen corresponding path program 6 times [2022-12-14 09:55:30,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:55:30,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773966224] [2022-12-14 09:55:30,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:30,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:55:30,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:30,585 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:30,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:55:30,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773966224] [2022-12-14 09:55:30,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773966224] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:55:30,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843156601] [2022-12-14 09:55:30,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:55:30,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:55:30,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:55:30,586 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:55:30,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 09:55:30,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:55:30,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:55:30,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 66 conjunts are in the unsatisfiable core [2022-12-14 09:55:30,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:30,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:55:32,925 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-12-14 09:55:32,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 26 [2022-12-14 09:55:32,929 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 27 refuted. 5 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:32,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:55:33,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2022-12-14 09:55:33,222 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:55:33,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 34 [2022-12-14 09:55:33,383 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:33,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843156601] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:55:33,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [532079661] [2022-12-14 09:55:33,384 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:55:33,384 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:55:33,384 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:55:33,385 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:55:33,385 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:55:33,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:33,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:55:33,433 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 11 treesize of output 7 [2022-12-14 09:55:33,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:55:33,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:55:33,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:55:33,544 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:55:33,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:55:33,817 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:55:36,252 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6194#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 09:55:36,252 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:55:36,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:55:36,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 19] total 45 [2022-12-14 09:55:36,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130813423] [2022-12-14 09:55:36,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:55:36,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-14 09:55:36,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:55:36,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-14 09:55:36,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=2934, Unknown=4, NotChecked=0, Total=3192 [2022-12-14 09:55:36,253 INFO L87 Difference]: Start difference. First operand 270 states and 318 transitions. Second operand has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:57,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:55:57,338 INFO L93 Difference]: Finished difference Result 474 states and 537 transitions. [2022-12-14 09:55:57,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-12-14 09:55:57,339 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 45 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 31 [2022-12-14 09:55:57,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:55:57,339 INFO L225 Difference]: With dead ends: 474 [2022-12-14 09:55:57,339 INFO L226 Difference]: Without dead ends: 394 [2022-12-14 09:55:57,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 3012 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=1394, Invalid=10592, Unknown=4, NotChecked=0, Total=11990 [2022-12-14 09:55:57,341 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 453 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 13 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:55:57,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 557 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1161 Invalid, 9 Unknown, 0 Unchecked, 5.2s Time] [2022-12-14 09:55:57,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-12-14 09:55:57,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 336. [2022-12-14 09:55:57,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 334 states have (on average 1.1826347305389222) internal successors, (395), 335 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:57,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 395 transitions. [2022-12-14 09:55:57,347 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 395 transitions. Word has length 31 [2022-12-14 09:55:57,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:55:57,347 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 395 transitions. [2022-12-14 09:55:57,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:57,347 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 395 transitions. [2022-12-14 09:55:57,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 09:55:57,347 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:55:57,347 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-12-14 09:55:57,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 09:55:57,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 09:55:57,549 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:55:57,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:55:57,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1346334120, now seen corresponding path program 5 times [2022-12-14 09:55:57,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:55:57,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206645333] [2022-12-14 09:55:57,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:57,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:55:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:57,760 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:57,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:55:57,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206645333] [2022-12-14 09:55:57,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206645333] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:55:57,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428333344] [2022-12-14 09:55:57,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:55:57,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:55:57,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:55:57,762 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:55:57,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 09:55:57,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 09:55:57,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:55:57,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-14 09:55:57,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:57,993 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:57,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:55:58,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 09:55:58,179 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:58,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428333344] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:55:58,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1125793553] [2022-12-14 09:55:58,180 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:55:58,180 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:55:58,180 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:55:58,180 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:55:58,180 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:55:58,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:58,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:55:58,219 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 11 treesize of output 7 [2022-12-14 09:55:58,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:55:58,271 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 [2022-12-14 09:55:58,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:55:58,342 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:55:58,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:55:58,644 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:56:00,638 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7327#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 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_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 09:56:00,638 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:56:00,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:56:00,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-12-14 09:56:00,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248078123] [2022-12-14 09:56:00,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:56:00,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 09:56:00,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:56:00,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 09:56:00,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 09:56:00,639 INFO L87 Difference]: Start difference. First operand 336 states and 395 transitions. Second operand has 25 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:00,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:56:00,957 INFO L93 Difference]: Finished difference Result 470 states and 541 transitions. [2022-12-14 09:56:00,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 09:56:00,958 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-12-14 09:56:00,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:56:00,959 INFO L225 Difference]: With dead ends: 470 [2022-12-14 09:56:00,959 INFO L226 Difference]: Without dead ends: 470 [2022-12-14 09:56:00,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=295, Invalid=1867, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 09:56:00,959 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 193 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:56:00,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 224 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:56:00,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-12-14 09:56:00,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 404. [2022-12-14 09:56:00,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 402 states have (on average 1.1791044776119404) internal successors, (474), 403 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:00,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 474 transitions. [2022-12-14 09:56:00,965 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 474 transitions. Word has length 31 [2022-12-14 09:56:00,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:56:00,966 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 474 transitions. [2022-12-14 09:56:00,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:00,966 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 474 transitions. [2022-12-14 09:56:00,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 09:56:00,966 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:56:00,966 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:56:00,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 09:56:01,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 09:56:01,168 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:56:01,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:56:01,169 INFO L85 PathProgramCache]: Analyzing trace with hash -988002626, now seen corresponding path program 7 times [2022-12-14 09:56:01,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:56:01,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981560385] [2022-12-14 09:56:01,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:56:01,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:56:01,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:56:01,497 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:01,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:56:01,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981560385] [2022-12-14 09:56:01,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981560385] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:56:01,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122690526] [2022-12-14 09:56:01,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:56:01,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:56:01,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:56:01,499 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:56:01,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 09:56:01,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:56:01,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-14 09:56:01,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:56:01,681 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:01,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:56:01,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 09:56:01,913 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:01,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122690526] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:56:01,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [899156364] [2022-12-14 09:56:01,914 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:56:01,914 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:56:01,914 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:56:01,914 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:56:01,914 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:56:01,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:01,931 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 [2022-12-14 09:56:01,958 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 11 treesize of output 7 [2022-12-14 09:56:01,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:56:01,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:56:02,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:56:02,055 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:56:02,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:56:02,282 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:56:03,812 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8457#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 09:56:03,812 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:56:03,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:56:03,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-12-14 09:56:03,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113335101] [2022-12-14 09:56:03,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:56:03,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 09:56:03,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:56:03,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 09:56:03,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1717, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 09:56:03,814 INFO L87 Difference]: Start difference. First operand 404 states and 474 transitions. Second operand has 32 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:04,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:56:04,483 INFO L93 Difference]: Finished difference Result 495 states and 567 transitions. [2022-12-14 09:56:04,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 09:56:04,483 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 32 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 33 [2022-12-14 09:56:04,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:56:04,484 INFO L225 Difference]: With dead ends: 495 [2022-12-14 09:56:04,484 INFO L226 Difference]: Without dead ends: 495 [2022-12-14 09:56:04,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=500, Invalid=3160, Unknown=0, NotChecked=0, Total=3660 [2022-12-14 09:56:04,485 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 252 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:56:04,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 363 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:56:04,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-12-14 09:56:04,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 432. [2022-12-14 09:56:04,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 430 states have (on average 1.1813953488372093) internal successors, (508), 431 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:04,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 508 transitions. [2022-12-14 09:56:04,491 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 508 transitions. Word has length 33 [2022-12-14 09:56:04,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:56:04,491 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 508 transitions. [2022-12-14 09:56:04,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:04,491 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 508 transitions. [2022-12-14 09:56:04,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 09:56:04,492 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:56:04,492 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:56:04,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 09:56:04,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:56:04,694 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:56:04,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:56:04,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1112546365, now seen corresponding path program 8 times [2022-12-14 09:56:04,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:56:04,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328716203] [2022-12-14 09:56:04,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:56:04,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:56:04,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:56:05,032 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:05,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:56:05,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328716203] [2022-12-14 09:56:05,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328716203] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:56:05,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367654902] [2022-12-14 09:56:05,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:56:05,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:56:05,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:56:05,033 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:56:05,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 09:56:05,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 09:56:05,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:56:05,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 70 conjunts are in the unsatisfiable core [2022-12-14 09:56:05,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:56:05,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:56:05,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 09:56:05,402 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:05,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:56:05,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-14 09:56:05,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:56:05,563 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:05,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367654902] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:56:05,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [145154181] [2022-12-14 09:56:05,564 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:56:05,564 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:56:05,564 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:56:05,564 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:56:05,565 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:56:05,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:05,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:56:05,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:56:05,647 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 [2022-12-14 09:56:05,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:56:05,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:56:05,742 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:56:05,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:56:05,962 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:56:07,989 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9678#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 09:56:07,989 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:56:07,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:56:07,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 32 [2022-12-14 09:56:07,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956797231] [2022-12-14 09:56:07,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:56:07,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 09:56:07,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:56:07,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 09:56:07,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1737, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 09:56:07,990 INFO L87 Difference]: Start difference. First operand 432 states and 508 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:08,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:56:08,930 INFO L93 Difference]: Finished difference Result 681 states and 780 transitions. [2022-12-14 09:56:08,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-14 09:56:08,931 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 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 37 [2022-12-14 09:56:08,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:56:08,934 INFO L225 Difference]: With dead ends: 681 [2022-12-14 09:56:08,934 INFO L226 Difference]: Without dead ends: 585 [2022-12-14 09:56:08,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=529, Invalid=4441, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 09:56:08,935 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 355 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:56:08,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 757 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 965 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:56:08,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-12-14 09:56:08,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 532. [2022-12-14 09:56:08,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 530 states have (on average 1.181132075471698) internal successors, (626), 531 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:08,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 626 transitions. [2022-12-14 09:56:08,942 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 626 transitions. Word has length 37 [2022-12-14 09:56:08,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:56:08,942 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 626 transitions. [2022-12-14 09:56:08,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:08,942 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 626 transitions. [2022-12-14 09:56:08,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 09:56:08,943 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:56:08,943 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2022-12-14 09:56:08,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 09:56:09,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-14 09:56:09,143 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:56:09,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:56:09,144 INFO L85 PathProgramCache]: Analyzing trace with hash -2073566237, now seen corresponding path program 6 times [2022-12-14 09:56:09,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:56:09,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723569161] [2022-12-14 09:56:09,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:56:09,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:56:09,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:56:09,511 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:09,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:56:09,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723569161] [2022-12-14 09:56:09,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723569161] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:56:09,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877797653] [2022-12-14 09:56:09,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:56:09,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:56:09,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:56:09,513 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:56:09,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 09:56:09,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:56:09,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:56:09,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 92 conjunts are in the unsatisfiable core [2022-12-14 09:56:09,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:56:09,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:56:09,811 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 09:56:09,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-12-14 09:56:09,817 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 3 [2022-12-14 09:56:10,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:10,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:56:10,435 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-12-14 09:56:10,436 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 6 case distinctions, treesize of input 32 treesize of output 21 [2022-12-14 09:56:10,440 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:10,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:56:10,673 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_534 (Array Int Int)) (|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse0 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_534) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (not (= (select v_ArrVal_534 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0)) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)))) is different from false [2022-12-14 09:56:10,680 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:56:10,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 34 [2022-12-14 09:56:10,688 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:56:10,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 57 [2022-12-14 09:56:10,698 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:56:10,698 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 27 treesize of output 37 [2022-12-14 09:56:11,073 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 14 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:11,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877797653] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:56:11,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1521114127] [2022-12-14 09:56:11,074 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:56:11,074 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:56:11,075 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:56:11,075 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:56:11,075 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:56:11,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:11,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:56:11,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:56:11,146 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 [2022-12-14 09:56:11,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:56:11,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:56:11,252 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:56:11,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:56:11,609 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:56:14,218 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11220#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 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_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 09:56:14,218 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:56:14,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:56:14,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 20] total 46 [2022-12-14 09:56:14,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85247695] [2022-12-14 09:56:14,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:56:14,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-14 09:56:14,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:56:14,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-14 09:56:14,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=3113, Unknown=1, NotChecked=112, Total=3422 [2022-12-14 09:56:14,220 INFO L87 Difference]: Start difference. First operand 532 states and 626 transitions. Second operand has 47 states, 47 states have (on average 1.8085106382978724) internal successors, (85), 46 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:17,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:56:17,165 INFO L93 Difference]: Finished difference Result 1200 states and 1377 transitions. [2022-12-14 09:56:17,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-14 09:56:17,166 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.8085106382978724) internal successors, (85), 46 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-12-14 09:56:17,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:56:17,168 INFO L225 Difference]: With dead ends: 1200 [2022-12-14 09:56:17,168 INFO L226 Difference]: Without dead ends: 774 [2022-12-14 09:56:17,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1612 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=764, Invalid=7789, Unknown=7, NotChecked=182, Total=8742 [2022-12-14 09:56:17,169 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 527 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 1696 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 1823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1696 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 09:56:17,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 933 Invalid, 1823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1696 Invalid, 1 Unknown, 117 Unchecked, 0.9s Time] [2022-12-14 09:56:17,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-12-14 09:56:17,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 571. [2022-12-14 09:56:17,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 569 states have (on average 1.1827768014059754) internal successors, (673), 570 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:17,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 673 transitions. [2022-12-14 09:56:17,177 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 673 transitions. Word has length 37 [2022-12-14 09:56:17,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:56:17,177 INFO L495 AbstractCegarLoop]: Abstraction has 571 states and 673 transitions. [2022-12-14 09:56:17,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.8085106382978724) internal successors, (85), 46 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:17,177 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 673 transitions. [2022-12-14 09:56:17,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 09:56:17,178 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:56:17,178 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:56:17,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 09:56:17,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-14 09:56:17,378 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:56:17,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:56:17,379 INFO L85 PathProgramCache]: Analyzing trace with hash -149602719, now seen corresponding path program 9 times [2022-12-14 09:56:17,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:56:17,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538808858] [2022-12-14 09:56:17,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:56:17,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:56:17,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:56:17,713 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:17,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:56:17,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538808858] [2022-12-14 09:56:17,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538808858] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:56:17,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375444120] [2022-12-14 09:56:17,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:56:17,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:56:17,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:56:17,714 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:56:17,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 09:56:17,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:56:17,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:56:17,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 64 conjunts are in the unsatisfiable core [2022-12-14 09:56:17,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:56:17,822 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 09:56:17,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 09:56:17,991 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 16 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:17,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:56:18,375 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 16 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:18,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375444120] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:56:18,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [613257679] [2022-12-14 09:56:18,376 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:56:18,376 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:56:18,376 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:56:18,377 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:56:18,377 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:56:18,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:18,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:56:18,423 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 [2022-12-14 09:56:18,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:56:18,468 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 [2022-12-14 09:56:18,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:56:18,533 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:56:18,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:56:18,732 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:56:20,212 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13343#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 09:56:20,213 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:56:20,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:56:20,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 41 [2022-12-14 09:56:20,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883717060] [2022-12-14 09:56:20,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:56:20,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-14 09:56:20,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:56:20,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-14 09:56:20,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=2594, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 09:56:20,214 INFO L87 Difference]: Start difference. First operand 571 states and 673 transitions. Second operand has 42 states, 41 states have (on average 2.341463414634146) internal successors, (96), 42 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) [2022-12-14 09:56:21,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:56:21,119 INFO L93 Difference]: Finished difference Result 691 states and 795 transitions. [2022-12-14 09:56:21,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 09:56:21,120 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.341463414634146) internal successors, (96), 42 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 39 [2022-12-14 09:56:21,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:56:21,122 INFO L225 Difference]: With dead ends: 691 [2022-12-14 09:56:21,122 INFO L226 Difference]: Without dead ends: 691 [2022-12-14 09:56:21,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=804, Invalid=4598, Unknown=0, NotChecked=0, Total=5402 [2022-12-14 09:56:21,123 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 346 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:56:21,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 582 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1086 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:56:21,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-12-14 09:56:21,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 603. [2022-12-14 09:56:21,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 601 states have (on average 1.1846921797004992) internal successors, (712), 602 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:21,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 712 transitions. [2022-12-14 09:56:21,132 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 712 transitions. Word has length 39 [2022-12-14 09:56:21,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:56:21,132 INFO L495 AbstractCegarLoop]: Abstraction has 603 states and 712 transitions. [2022-12-14 09:56:21,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.341463414634146) internal successors, (96), 42 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) [2022-12-14 09:56:21,133 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 712 transitions. [2022-12-14 09:56:21,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 09:56:21,133 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:56:21,133 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 09:56:21,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 09:56:21,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:56:21,335 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:56:21,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:56:21,336 INFO L85 PathProgramCache]: Analyzing trace with hash -281352558, now seen corresponding path program 7 times [2022-12-14 09:56:21,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:56:21,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54900336] [2022-12-14 09:56:21,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:56:21,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:56:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:56:21,566 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:21,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:56:21,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54900336] [2022-12-14 09:56:21,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54900336] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:56:21,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608657059] [2022-12-14 09:56:21,567 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:56:21,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:56:21,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:56:21,568 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:56:21,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 09:56:21,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:56:21,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-14 09:56:21,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:56:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:21,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:56:21,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 09:56:21,888 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:21,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608657059] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:56:21,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [837288789] [2022-12-14 09:56:21,889 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:56:21,889 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:56:21,889 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:56:21,889 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:56:21,889 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:56:21,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:21,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:56:21,934 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 11 treesize of output 7 [2022-12-14 09:56:21,964 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 [2022-12-14 09:56:21,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:56:22,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:56:22,065 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:56:22,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:56:22,480 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:56:24,666 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14942#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 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_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 09:56:24,666 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:56:24,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:56:24,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2022-12-14 09:56:24,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65801995] [2022-12-14 09:56:24,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:56:24,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 09:56:24,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:56:24,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 09:56:24,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1203, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 09:56:24,668 INFO L87 Difference]: Start difference. First operand 603 states and 712 transitions. Second operand has 25 states, 24 states have (on average 3.0) internal successors, (72), 24 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) [2022-12-14 09:56:25,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:56:25,156 INFO L93 Difference]: Finished difference Result 877 states and 1019 transitions. [2022-12-14 09:56:25,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 09:56:25,156 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.0) internal successors, (72), 24 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 [2022-12-14 09:56:25,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:56:25,158 INFO L225 Difference]: With dead ends: 877 [2022-12-14 09:56:25,158 INFO L226 Difference]: Without dead ends: 877 [2022-12-14 09:56:25,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=293, Invalid=2059, Unknown=0, NotChecked=0, Total=2352 [2022-12-14 09:56:25,158 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 224 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:56:25,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 407 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:56:25,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2022-12-14 09:56:25,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 701. [2022-12-14 09:56:25,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 699 states have (on average 1.1831187410586552) internal successors, (827), 700 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:25,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 827 transitions. [2022-12-14 09:56:25,165 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 827 transitions. Word has length 39 [2022-12-14 09:56:25,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:56:25,166 INFO L495 AbstractCegarLoop]: Abstraction has 701 states and 827 transitions. [2022-12-14 09:56:25,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.0) internal successors, (72), 24 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) [2022-12-14 09:56:25,166 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 827 transitions. [2022-12-14 09:56:25,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 09:56:25,166 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:56:25,166 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:56:25,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 09:56:25,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-14 09:56:25,368 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:56:25,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:56:25,368 INFO L85 PathProgramCache]: Analyzing trace with hash -716287514, now seen corresponding path program 10 times [2022-12-14 09:56:25,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:56:25,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131943096] [2022-12-14 09:56:25,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:56:25,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:56:25,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:56:25,763 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:25,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:56:25,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131943096] [2022-12-14 09:56:25,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131943096] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:56:25,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206104468] [2022-12-14 09:56:25,763 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:56:25,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:56:25,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:56:25,764 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:56:25,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 09:56:25,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:56:25,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 79 conjunts are in the unsatisfiable core [2022-12-14 09:56:25,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:56:26,019 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 [2022-12-14 09:56:26,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:56:26,533 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:56:26,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-12-14 09:56:26,538 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:26,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:56:26,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-14 09:56:26,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-14 09:56:26,937 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:26,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206104468] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:56:26,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1525763226] [2022-12-14 09:56:26,939 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:56:26,939 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:56:26,939 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:56:26,939 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:56:26,940 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:56:26,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:26,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:56:26,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:56:27,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:56:27,037 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 [2022-12-14 09:56:27,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:56:27,103 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:56:27,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:56:27,299 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:56:29,185 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16858#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 09:56:29,185 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:56:29,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:56:29,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 49 [2022-12-14 09:56:29,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76344556] [2022-12-14 09:56:29,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:56:29,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-14 09:56:29,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:56:29,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-14 09:56:29,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=3531, Unknown=0, NotChecked=0, Total=3782 [2022-12-14 09:56:29,187 INFO L87 Difference]: Start difference. First operand 701 states and 827 transitions. Second operand has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:31,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:56:31,058 INFO L93 Difference]: Finished difference Result 1077 states and 1242 transitions. [2022-12-14 09:56:31,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-14 09:56:31,059 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-12-14 09:56:31,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:56:31,060 INFO L225 Difference]: With dead ends: 1077 [2022-12-14 09:56:31,060 INFO L226 Difference]: Without dead ends: 923 [2022-12-14 09:56:31,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2206 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=755, Invalid=7801, Unknown=0, NotChecked=0, Total=8556 [2022-12-14 09:56:31,061 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 336 mSDsluCounter, 1744 mSDsCounter, 0 mSdLazyCounter, 2374 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 1817 SdHoareTripleChecker+Invalid, 2385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 09:56:31,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 1817 Invalid, 2385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2374 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 09:56:31,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2022-12-14 09:56:31,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 845. [2022-12-14 09:56:31,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 843 states have (on average 1.1838671411625148) internal successors, (998), 844 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:31,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 998 transitions. [2022-12-14 09:56:31,069 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 998 transitions. Word has length 43 [2022-12-14 09:56:31,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:56:31,070 INFO L495 AbstractCegarLoop]: Abstraction has 845 states and 998 transitions. [2022-12-14 09:56:31,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:31,070 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 998 transitions. [2022-12-14 09:56:31,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 09:56:31,070 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:56:31,071 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:56:31,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 09:56:31,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:56:31,271 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:56:31,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:56:31,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1172356612, now seen corresponding path program 11 times [2022-12-14 09:56:31,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:56:31,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325026149] [2022-12-14 09:56:31,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:56:31,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:56:31,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:56:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 16 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:31,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:56:31,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325026149] [2022-12-14 09:56:31,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325026149] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:56:31,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267863513] [2022-12-14 09:56:31,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:56:31,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:56:31,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:56:31,706 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:56:31,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 09:56:31,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-14 09:56:31,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:56:31,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-14 09:56:31,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:56:32,255 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 25 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:32,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:56:32,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 09:56:32,572 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 25 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:32,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267863513] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:56:32,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2063302886] [2022-12-14 09:56:32,573 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:56:32,573 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:56:32,573 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:56:32,573 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:56:32,573 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:56:32,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:32,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:56:32,621 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 [2022-12-14 09:56:32,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:56:32,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:56:32,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:56:32,748 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:56:32,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:56:32,956 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:56:34,460 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19165#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 09:56:34,460 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:56:34,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:56:34,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-12-14 09:56:34,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160749923] [2022-12-14 09:56:34,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:56:34,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-14 09:56:34,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:56:34,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-14 09:56:34,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=3082, Unknown=0, NotChecked=0, Total=3422 [2022-12-14 09:56:34,461 INFO L87 Difference]: Start difference. First operand 845 states and 998 transitions. Second operand has 47 states, 46 states have (on average 2.5869565217391304) internal successors, (119), 47 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:35,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:56:35,493 INFO L93 Difference]: Finished difference Result 998 states and 1153 transitions. [2022-12-14 09:56:35,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 09:56:35,493 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.5869565217391304) internal successors, (119), 47 states have internal predecessors, (119), 0 states have call successors, (0), 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 [2022-12-14 09:56:35,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:56:35,495 INFO L225 Difference]: With dead ends: 998 [2022-12-14 09:56:35,495 INFO L226 Difference]: Without dead ends: 998 [2022-12-14 09:56:35,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 87 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1987 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=960, Invalid=5682, Unknown=0, NotChecked=0, Total=6642 [2022-12-14 09:56:35,495 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 312 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:56:35,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 708 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1266 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:56:35,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2022-12-14 09:56:35,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 881. [2022-12-14 09:56:35,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 879 states have (on average 1.1854379977246872) internal successors, (1042), 880 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:35,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1042 transitions. [2022-12-14 09:56:35,504 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1042 transitions. Word has length 45 [2022-12-14 09:56:35,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:56:35,504 INFO L495 AbstractCegarLoop]: Abstraction has 881 states and 1042 transitions. [2022-12-14 09:56:35,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.5869565217391304) internal successors, (119), 47 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:35,504 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1042 transitions. [2022-12-14 09:56:35,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 09:56:35,505 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:56:35,505 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 09:56:35,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 09:56:35,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:56:35,706 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:56:35,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:56:35,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1207739549, now seen corresponding path program 8 times [2022-12-14 09:56:35,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:56:35,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442049490] [2022-12-14 09:56:35,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:56:35,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:56:35,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:56:36,178 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 10 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:36,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:56:36,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442049490] [2022-12-14 09:56:36,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442049490] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:56:36,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042306353] [2022-12-14 09:56:36,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:56:36,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:56:36,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:56:36,179 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:56:36,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 09:56:36,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 09:56:36,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:56:36,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 75 conjunts are in the unsatisfiable core [2022-12-14 09:56:36,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:56:36,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-14 09:56:36,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:56:36,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 09:56:36,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 09:56:36,591 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 10 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:36,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:56:36,672 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:56:36,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 09:56:36,676 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:56:36,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-14 09:56:36,800 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 10 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:36,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042306353] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:56:36,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1826293929] [2022-12-14 09:56:36,801 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:56:36,801 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:56:36,801 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:56:36,801 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:56:36,801 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:56:36,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:36,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:56:36,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:56:36,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:56:36,897 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 [2022-12-14 09:56:36,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:56:36,969 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:56:36,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:56:37,288 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:56:39,197 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21398#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 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_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 09:56:39,197 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:56:39,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:56:39,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 31 [2022-12-14 09:56:39,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485202000] [2022-12-14 09:56:39,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:56:39,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 09:56:39,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:56:39,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 09:56:39,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1751, Unknown=5, NotChecked=0, Total=1892 [2022-12-14 09:56:39,198 INFO L87 Difference]: Start difference. First operand 881 states and 1042 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:40,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:56:40,065 INFO L93 Difference]: Finished difference Result 1752 states and 2026 transitions. [2022-12-14 09:56:40,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 09:56:40,065 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-12-14 09:56:40,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:56:40,067 INFO L225 Difference]: With dead ends: 1752 [2022-12-14 09:56:40,067 INFO L226 Difference]: Without dead ends: 1260 [2022-12-14 09:56:40,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=397, Invalid=4020, Unknown=5, NotChecked=0, Total=4422 [2022-12-14 09:56:40,067 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 363 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:56:40,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 971 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:56:40,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2022-12-14 09:56:40,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 930. [2022-12-14 09:56:40,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 928 states have (on average 1.1864224137931034) internal successors, (1101), 929 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:40,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1101 transitions. [2022-12-14 09:56:40,076 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1101 transitions. Word has length 45 [2022-12-14 09:56:40,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:56:40,076 INFO L495 AbstractCegarLoop]: Abstraction has 930 states and 1101 transitions. [2022-12-14 09:56:40,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:40,076 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1101 transitions. [2022-12-14 09:56:40,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 09:56:40,077 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:56:40,077 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-12-14 09:56:40,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 09:56:40,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:56:40,278 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:56:40,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:56:40,279 INFO L85 PathProgramCache]: Analyzing trace with hash 326469708, now seen corresponding path program 9 times [2022-12-14 09:56:40,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:56:40,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771068627] [2022-12-14 09:56:40,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:56:40,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:56:40,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:56:40,581 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:40,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:56:40,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771068627] [2022-12-14 09:56:40,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771068627] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:56:40,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468253215] [2022-12-14 09:56:40,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:56:40,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:56:40,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:56:40,582 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:56:40,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 09:56:40,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:56:40,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:56:40,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 63 conjunts are in the unsatisfiable core [2022-12-14 09:56:40,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:56:40,801 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:40,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:56:41,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 09:56:41,043 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:41,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468253215] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:56:41,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [752988387] [2022-12-14 09:56:41,044 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:56:41,044 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:56:41,044 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:56:41,044 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:56:41,044 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:56:41,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:41,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:56:41,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:56:41,120 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 [2022-12-14 09:56:41,144 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 [2022-12-14 09:56:41,184 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 [2022-12-14 09:56:41,224 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:56:41,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:56:41,570 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:56:43,446 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24441#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 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_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 09:56:43,446 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:56:43,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:56:43,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 25 [2022-12-14 09:56:43,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015886668] [2022-12-14 09:56:43,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:56:43,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 09:56:43,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:56:43,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 09:56:43,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1341, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 09:56:43,447 INFO L87 Difference]: Start difference. First operand 930 states and 1101 transitions. Second operand has 27 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:43,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:56:43,906 INFO L93 Difference]: Finished difference Result 1388 states and 1624 transitions. [2022-12-14 09:56:43,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 09:56:43,907 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-12-14 09:56:43,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:56:43,908 INFO L225 Difference]: With dead ends: 1388 [2022-12-14 09:56:43,909 INFO L226 Difference]: Without dead ends: 1388 [2022-12-14 09:56:43,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 111 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=354, Invalid=2402, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 09:56:43,909 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 242 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:56:43,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 543 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:56:43,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2022-12-14 09:56:43,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1058. [2022-12-14 09:56:43,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1056 states have (on average 1.1856060606060606) internal successors, (1252), 1057 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:43,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 1252 transitions. [2022-12-14 09:56:43,919 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 1252 transitions. Word has length 47 [2022-12-14 09:56:43,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:56:43,919 INFO L495 AbstractCegarLoop]: Abstraction has 1058 states and 1252 transitions. [2022-12-14 09:56:43,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:43,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 1252 transitions. [2022-12-14 09:56:43,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 09:56:43,920 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:56:43,920 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:56:43,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-14 09:56:44,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:56:44,121 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:56:44,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:56:44,122 INFO L85 PathProgramCache]: Analyzing trace with hash -851752951, now seen corresponding path program 12 times [2022-12-14 09:56:44,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:56:44,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659837860] [2022-12-14 09:56:44,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:56:44,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:56:44,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:56:44,570 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:44,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:56:44,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659837860] [2022-12-14 09:56:44,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659837860] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:56:44,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670002417] [2022-12-14 09:56:44,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:56:44,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:56:44,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:56:44,572 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:56:44,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 09:56:44,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:56:44,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:56:44,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 88 conjunts are in the unsatisfiable core [2022-12-14 09:56:44,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:56:44,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:56:44,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 09:56:44,934 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:44,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:56:44,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-14 09:56:44,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:56:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:45,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670002417] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:56:45,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [944033601] [2022-12-14 09:56:45,084 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:56:45,084 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:56:45,084 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:56:45,084 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:56:45,084 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:56:45,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:45,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:56:45,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:56:45,171 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 [2022-12-14 09:56:45,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:56:45,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:56:45,262 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:56:45,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:56:45,479 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:56:47,500 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27253#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 09:56:47,500 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:56:47,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:56:47,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 38 [2022-12-14 09:56:47,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442004305] [2022-12-14 09:56:47,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:56:47,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-14 09:56:47,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:56:47,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-14 09:56:47,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=2279, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 09:56:47,501 INFO L87 Difference]: Start difference. First operand 1058 states and 1252 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:48,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:56:48,835 INFO L93 Difference]: Finished difference Result 1585 states and 1838 transitions. [2022-12-14 09:56:48,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-14 09:56:48,835 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 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 49 [2022-12-14 09:56:48,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:56:48,837 INFO L225 Difference]: With dead ends: 1585 [2022-12-14 09:56:48,837 INFO L226 Difference]: Without dead ends: 1361 [2022-12-14 09:56:48,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1638 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=645, Invalid=6495, Unknown=0, NotChecked=0, Total=7140 [2022-12-14 09:56:48,838 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 344 mSDsluCounter, 1572 mSDsCounter, 0 mSdLazyCounter, 1902 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 1659 SdHoareTripleChecker+Invalid, 1913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 09:56:48,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 1659 Invalid, 1913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1902 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 09:56:48,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2022-12-14 09:56:48,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1254. [2022-12-14 09:56:48,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1252 states have (on average 1.1869009584664536) internal successors, (1486), 1253 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:48,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1486 transitions. [2022-12-14 09:56:48,848 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1486 transitions. Word has length 49 [2022-12-14 09:56:48,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:56:48,848 INFO L495 AbstractCegarLoop]: Abstraction has 1254 states and 1486 transitions. [2022-12-14 09:56:48,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:48,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1486 transitions. [2022-12-14 09:56:48,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 09:56:48,849 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:56:48,850 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:56:48,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-14 09:56:49,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-14 09:56:49,051 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:56:49,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:56:49,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1548199335, now seen corresponding path program 13 times [2022-12-14 09:56:49,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:56:49,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784605685] [2022-12-14 09:56:49,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:56:49,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:56:49,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:56:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:49,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:56:49,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784605685] [2022-12-14 09:56:49,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784605685] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:56:49,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81991981] [2022-12-14 09:56:49,453 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:56:49,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:56:49,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:56:49,454 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:56:49,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 09:56:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:56:49,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 81 conjunts are in the unsatisfiable core [2022-12-14 09:56:49,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:56:49,716 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:49,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:56:49,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 09:56:50,028 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:50,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81991981] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:56:50,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [953679620] [2022-12-14 09:56:50,029 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:56:50,030 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:56:50,030 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:56:50,030 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:56:50,030 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:56:50,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:50,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:56:50,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:56:50,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:56:50,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:56:50,158 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 [2022-12-14 09:56:50,195 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:56:50,195 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 [2022-12-14 09:56:50,388 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:56:52,264 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30518#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 09:56:52,264 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:56:52,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:56:52,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 43 [2022-12-14 09:56:52,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373628643] [2022-12-14 09:56:52,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:56:52,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 09:56:52,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:56:52,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 09:56:52,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=2798, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 09:56:52,265 INFO L87 Difference]: Start difference. First operand 1254 states and 1486 transitions. Second operand has 44 states, 43 states have (on average 2.488372093023256) internal successors, (107), 44 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:53,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:56:53,282 INFO L93 Difference]: Finished difference Result 1463 states and 1698 transitions. [2022-12-14 09:56:53,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-14 09:56:53,283 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.488372093023256) internal successors, (107), 44 states have internal predecessors, (107), 0 states have call successors, (0), 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 [2022-12-14 09:56:53,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:56:53,285 INFO L225 Difference]: With dead ends: 1463 [2022-12-14 09:56:53,285 INFO L226 Difference]: Without dead ends: 1463 [2022-12-14 09:56:53,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 109 SyntacticMatches, 8 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1771 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=970, Invalid=5672, Unknown=0, NotChecked=0, Total=6642 [2022-12-14 09:56:53,286 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 446 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:56:53,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 800 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:56:53,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2022-12-14 09:56:53,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 1298. [2022-12-14 09:56:53,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1296 states have (on average 1.1882716049382716) internal successors, (1540), 1297 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:53,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 1540 transitions. [2022-12-14 09:56:53,296 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 1540 transitions. Word has length 51 [2022-12-14 09:56:53,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:56:53,296 INFO L495 AbstractCegarLoop]: Abstraction has 1298 states and 1540 transitions. [2022-12-14 09:56:53,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.488372093023256) internal successors, (107), 44 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:53,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 1540 transitions. [2022-12-14 09:56:53,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 09:56:53,297 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:56:53,297 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2022-12-14 09:56:53,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-14 09:56:53,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-14 09:56:53,498 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:56:53,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:56:53,499 INFO L85 PathProgramCache]: Analyzing trace with hash 323064535, now seen corresponding path program 10 times [2022-12-14 09:56:53,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:56:53,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266543959] [2022-12-14 09:56:53,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:56:53,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:56:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:56:53,936 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 12 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:53,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:56:53,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266543959] [2022-12-14 09:56:53,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266543959] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:56:53,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418687459] [2022-12-14 09:56:53,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:56:53,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:56:53,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:56:53,937 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:56:53,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 09:56:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:56:54,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 91 conjunts are in the unsatisfiable core [2022-12-14 09:56:54,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:56:54,031 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 10 treesize of output 8 [2022-12-14 09:56:54,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:56:54,251 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 16 treesize of output 18 [2022-12-14 09:56:54,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:56:54,599 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:56:54,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-12-14 09:56:54,604 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 12 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:54,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:56:54,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 treesize of output 13 [2022-12-14 09:56:54,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:56:54,760 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 12 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:54,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418687459] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:56:54,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [754582700] [2022-12-14 09:56:54,761 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:56:54,761 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:56:54,761 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:56:54,761 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:56:54,761 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:56:54,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:56:54,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:56:54,799 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 11 treesize of output 7 [2022-12-14 09:56:54,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:56:54,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:56:54,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:56:54,917 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:56:54,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:56:55,215 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:56:57,500 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33694#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 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_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 09:56:57,500 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:56:57,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:56:57,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-12-14 09:56:57,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919597039] [2022-12-14 09:56:57,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:56:57,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-14 09:56:57,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:56:57,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-14 09:56:57,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2396, Unknown=0, NotChecked=0, Total=2550 [2022-12-14 09:56:57,501 INFO L87 Difference]: Start difference. First operand 1298 states and 1540 transitions. Second operand has 39 states, 39 states have (on average 2.6923076923076925) internal successors, (105), 38 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:58,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:56:58,833 INFO L93 Difference]: Finished difference Result 2675 states and 3117 transitions. [2022-12-14 09:56:58,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-14 09:56:58,833 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6923076923076925) internal successors, (105), 38 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-12-14 09:56:58,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:56:58,836 INFO L225 Difference]: With dead ends: 2675 [2022-12-14 09:56:58,836 INFO L226 Difference]: Without dead ends: 1905 [2022-12-14 09:56:58,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 125 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=440, Invalid=5412, Unknown=0, NotChecked=0, Total=5852 [2022-12-14 09:56:58,836 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 342 mSDsluCounter, 1530 mSDsCounter, 0 mSdLazyCounter, 2041 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 1604 SdHoareTripleChecker+Invalid, 2050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 09:56:58,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 1604 Invalid, 2050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2041 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 09:56:58,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1905 states. [2022-12-14 09:56:58,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1905 to 1353. [2022-12-14 09:56:58,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1351 states have (on average 1.1887490747594374) internal successors, (1606), 1352 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:58,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 1606 transitions. [2022-12-14 09:56:58,848 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 1606 transitions. Word has length 53 [2022-12-14 09:56:58,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:56:58,849 INFO L495 AbstractCegarLoop]: Abstraction has 1353 states and 1606 transitions. [2022-12-14 09:56:58,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.6923076923076925) internal successors, (105), 38 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:58,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 1606 transitions. [2022-12-14 09:56:58,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 09:56:58,849 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:56:58,850 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:56:58,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-14 09:56:59,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:56:59,051 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:56:59,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:56:59,052 INFO L85 PathProgramCache]: Analyzing trace with hash 13608492, now seen corresponding path program 14 times [2022-12-14 09:56:59,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:56:59,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105432683] [2022-12-14 09:56:59,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:56:59,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:56:59,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:56:59,516 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:59,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:56:59,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105432683] [2022-12-14 09:56:59,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105432683] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:56:59,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624691105] [2022-12-14 09:56:59,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:56:59,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:56:59,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:56:59,517 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:56:59,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 09:56:59,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-14 09:56:59,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:56:59,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 100 conjunts are in the unsatisfiable core [2022-12-14 09:56:59,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:56:59,846 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 [2022-12-14 09:56:59,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 09:56:59,978 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:59,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:57:00,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-14 09:57:00,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:57:00,134 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:00,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624691105] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:57:00,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1933439737] [2022-12-14 09:57:00,135 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:57:00,136 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:57:00,136 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:57:00,136 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:57:00,136 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:57:00,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:00,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:57:00,179 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 11 treesize of output 7 [2022-12-14 09:57:00,206 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 [2022-12-14 09:57:00,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:57:00,257 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 [2022-12-14 09:57:00,286 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:57:00,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:57:00,485 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:57:02,398 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '38151#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 09:57:02,398 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:57:02,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:57:02,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 41 [2022-12-14 09:57:02,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177796766] [2022-12-14 09:57:02,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:57:02,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-14 09:57:02,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:57:02,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-14 09:57:02,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2577, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 09:57:02,399 INFO L87 Difference]: Start difference. First operand 1353 states and 1606 transitions. Second operand has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:04,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:57:04,515 INFO L93 Difference]: Finished difference Result 2007 states and 2336 transitions. [2022-12-14 09:57:04,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-14 09:57:04,515 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-12-14 09:57:04,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:57:04,517 INFO L225 Difference]: With dead ends: 2007 [2022-12-14 09:57:04,517 INFO L226 Difference]: Without dead ends: 1701 [2022-12-14 09:57:04,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1905 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=703, Invalid=7669, Unknown=0, NotChecked=0, Total=8372 [2022-12-14 09:57:04,518 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 434 mSDsluCounter, 1972 mSDsCounter, 0 mSdLazyCounter, 2472 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 2073 SdHoareTripleChecker+Invalid, 2484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 09:57:04,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 2073 Invalid, 2484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2472 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 09:57:04,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2022-12-14 09:57:04,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1575. [2022-12-14 09:57:04,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1573 states have (on average 1.1900826446280992) internal successors, (1872), 1574 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:04,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 1872 transitions. [2022-12-14 09:57:04,530 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 1872 transitions. Word has length 55 [2022-12-14 09:57:04,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:57:04,530 INFO L495 AbstractCegarLoop]: Abstraction has 1575 states and 1872 transitions. [2022-12-14 09:57:04,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:04,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 1872 transitions. [2022-12-14 09:57:04,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 09:57:04,532 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:57:04,532 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2022-12-14 09:57:04,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-14 09:57:04,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-14 09:57:04,733 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:57:04,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:57:04,734 INFO L85 PathProgramCache]: Analyzing trace with hash -269527162, now seen corresponding path program 11 times [2022-12-14 09:57:04,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:57:04,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888185510] [2022-12-14 09:57:04,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:57:04,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:57:04,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:57:05,120 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 16 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:05,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:57:05,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888185510] [2022-12-14 09:57:05,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888185510] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:57:05,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991540646] [2022-12-14 09:57:05,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:57:05,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:57:05,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:57:05,121 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:57:05,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-14 09:57:05,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-14 09:57:05,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:57:05,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-14 09:57:05,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:57:05,523 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 25 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:05,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:57:05,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 09:57:05,791 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 25 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:05,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991540646] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:57:05,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [976805774] [2022-12-14 09:57:05,792 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:57:05,792 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:57:05,793 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:57:05,793 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:57:05,793 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:57:05,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:05,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:57:05,835 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 11 treesize of output 7 [2022-12-14 09:57:05,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:57:05,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:57:05,931 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 [2022-12-14 09:57:05,968 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:57:05,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:57:06,309 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:57:08,242 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '42185#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 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_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 09:57:08,242 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:57:08,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:57:08,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 36 [2022-12-14 09:57:08,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707982907] [2022-12-14 09:57:08,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:57:08,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-14 09:57:08,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:57:08,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-14 09:57:08,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=2185, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 09:57:08,243 INFO L87 Difference]: Start difference. First operand 1575 states and 1872 transitions. Second operand has 38 states, 37 states have (on average 3.675675675675676) internal successors, (136), 37 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:08,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:57:08,832 INFO L93 Difference]: Finished difference Result 2323 states and 2740 transitions. [2022-12-14 09:57:08,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 09:57:08,832 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 3.675675675675676) internal successors, (136), 37 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-12-14 09:57:08,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:57:08,835 INFO L225 Difference]: With dead ends: 2323 [2022-12-14 09:57:08,835 INFO L226 Difference]: Without dead ends: 2323 [2022-12-14 09:57:08,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 125 SyntacticMatches, 7 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=610, Invalid=3680, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 09:57:08,836 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 377 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:57:08,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 680 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:57:08,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2022-12-14 09:57:08,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 1771. [2022-12-14 09:57:08,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1771 states, 1769 states have (on average 1.1899378179762579) internal successors, (2105), 1770 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:08,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1771 states to 1771 states and 2105 transitions. [2022-12-14 09:57:08,852 INFO L78 Accepts]: Start accepts. Automaton has 1771 states and 2105 transitions. Word has length 55 [2022-12-14 09:57:08,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:57:08,852 INFO L495 AbstractCegarLoop]: Abstraction has 1771 states and 2105 transitions. [2022-12-14 09:57:08,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 3.675675675675676) internal successors, (136), 37 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:08,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1771 states and 2105 transitions. [2022-12-14 09:57:08,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 09:57:08,853 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:57:08,853 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:57:08,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-14 09:57:09,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-14 09:57:09,054 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:57:09,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:57:09,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1618662730, now seen corresponding path program 15 times [2022-12-14 09:57:09,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:57:09,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306914288] [2022-12-14 09:57:09,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:57:09,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:57:09,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:57:09,587 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 36 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:09,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:57:09,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306914288] [2022-12-14 09:57:09,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306914288] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:57:09,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573871050] [2022-12-14 09:57:09,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:57:09,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:57:09,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:57:09,588 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:57:09,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-14 09:57:09,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:57:09,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:57:09,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 96 conjunts are in the unsatisfiable core [2022-12-14 09:57:09,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:57:09,703 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 09:57:09,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 09:57:09,968 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 49 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:09,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:57:10,593 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 49 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:10,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573871050] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:57:10,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [299869315] [2022-12-14 09:57:10,594 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:57:10,594 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:57:10,594 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:57:10,594 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:57:10,594 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:57:10,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:10,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:57:10,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:57:10,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:57:10,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:57:10,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:57:10,761 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:57:10,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:57:11,034 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:57:13,621 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '46716#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 09:57:13,621 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:57:13,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:57:13,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 55 [2022-12-14 09:57:13,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355600313] [2022-12-14 09:57:13,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:57:13,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-14 09:57:13,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:57:13,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-14 09:57:13,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=508, Invalid=4184, Unknown=0, NotChecked=0, Total=4692 [2022-12-14 09:57:13,623 INFO L87 Difference]: Start difference. First operand 1771 states and 2105 transitions. Second operand has 57 states, 56 states have (on average 2.482142857142857) internal successors, (139), 56 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:15,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:57:15,296 INFO L93 Difference]: Finished difference Result 2044 states and 2382 transitions. [2022-12-14 09:57:15,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-14 09:57:15,296 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 2.482142857142857) internal successors, (139), 56 states have internal predecessors, (139), 0 states have call successors, (0), 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 [2022-12-14 09:57:15,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:57:15,298 INFO L225 Difference]: With dead ends: 2044 [2022-12-14 09:57:15,299 INFO L226 Difference]: Without dead ends: 2044 [2022-12-14 09:57:15,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2444 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1626, Invalid=7880, Unknown=0, NotChecked=0, Total=9506 [2022-12-14 09:57:15,299 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 630 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 1559 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 1561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 09:57:15,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [630 Valid, 920 Invalid, 1561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1559 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 09:57:15,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2022-12-14 09:57:15,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 1823. [2022-12-14 09:57:15,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1823 states, 1821 states have (on average 1.1911037891268534) internal successors, (2169), 1822 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) [2022-12-14 09:57:15,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1823 states to 1823 states and 2169 transitions. [2022-12-14 09:57:15,313 INFO L78 Accepts]: Start accepts. Automaton has 1823 states and 2169 transitions. Word has length 57 [2022-12-14 09:57:15,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:57:15,314 INFO L495 AbstractCegarLoop]: Abstraction has 1823 states and 2169 transitions. [2022-12-14 09:57:15,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 2.482142857142857) internal successors, (139), 56 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:15,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1823 states and 2169 transitions. [2022-12-14 09:57:15,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 09:57:15,315 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:57:15,315 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:57:15,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-14 09:57:15,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-12-14 09:57:15,516 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:57:15,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:57:15,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1389120591, now seen corresponding path program 16 times [2022-12-14 09:57:15,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:57:15,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608754274] [2022-12-14 09:57:15,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:57:15,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:57:15,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:57:16,124 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:16,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:57:16,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608754274] [2022-12-14 09:57:16,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608754274] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:57:16,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390391472] [2022-12-14 09:57:16,124 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:57:16,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:57:16,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:57:16,125 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:57:16,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-14 09:57:16,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:57:16,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 110 conjunts are in the unsatisfiable core [2022-12-14 09:57:16,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:57:16,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:57:16,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 09:57:16,484 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:16,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:57:16,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-14 09:57:16,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:57:16,634 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:16,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390391472] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:57:16,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [857451118] [2022-12-14 09:57:16,634 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:57:16,635 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:57:16,635 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:57:16,635 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:57:16,635 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:57:16,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:16,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:57:16,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:57:16,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:57:16,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:57:16,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:57:16,807 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:57:16,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:57:17,002 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:57:18,900 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '51057#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 09:57:18,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:57:18,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:57:18,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 44 [2022-12-14 09:57:18,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638851553] [2022-12-14 09:57:18,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:57:18,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 09:57:18,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:57:18,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 09:57:18,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=2893, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 09:57:18,901 INFO L87 Difference]: Start difference. First operand 1823 states and 2169 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:21,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:57:21,129 INFO L93 Difference]: Finished difference Result 2603 states and 3043 transitions. [2022-12-14 09:57:21,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-14 09:57:21,129 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 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 [2022-12-14 09:57:21,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:57:21,132 INFO L225 Difference]: With dead ends: 2603 [2022-12-14 09:57:21,132 INFO L226 Difference]: Without dead ends: 2263 [2022-12-14 09:57:21,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 150 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2194 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=761, Invalid=8941, Unknown=0, NotChecked=0, Total=9702 [2022-12-14 09:57:21,133 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 455 mSDsluCounter, 2887 mSDsCounter, 0 mSdLazyCounter, 3383 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 3002 SdHoareTripleChecker+Invalid, 3397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 3383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:57:21,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 3002 Invalid, 3397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 3383 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 09:57:21,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2022-12-14 09:57:21,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 2107. [2022-12-14 09:57:21,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2107 states, 2105 states have (on average 1.192874109263658) internal successors, (2511), 2106 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:21,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2107 states to 2107 states and 2511 transitions. [2022-12-14 09:57:21,153 INFO L78 Accepts]: Start accepts. Automaton has 2107 states and 2511 transitions. Word has length 61 [2022-12-14 09:57:21,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:57:21,153 INFO L495 AbstractCegarLoop]: Abstraction has 2107 states and 2511 transitions. [2022-12-14 09:57:21,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:21,153 INFO L276 IsEmpty]: Start isEmpty. Operand 2107 states and 2511 transitions. [2022-12-14 09:57:21,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 09:57:21,155 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:57:21,155 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2022-12-14 09:57:21,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-14 09:57:21,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-12-14 09:57:21,356 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:57:21,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:57:21,356 INFO L85 PathProgramCache]: Analyzing trace with hash 386764433, now seen corresponding path program 12 times [2022-12-14 09:57:21,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:57:21,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486288650] [2022-12-14 09:57:21,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:57:21,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:57:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:57:21,938 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 14 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:21,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:57:21,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486288650] [2022-12-14 09:57:21,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486288650] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:57:21,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388231493] [2022-12-14 09:57:21,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:57:21,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:57:21,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:57:21,940 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:57:21,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-14 09:57:22,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:57:22,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:57:22,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 125 conjunts are in the unsatisfiable core [2022-12-14 09:57:22,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:57:22,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:57:22,414 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-12-14 09:57:22,415 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 24 treesize of output 33 [2022-12-14 09:57:23,765 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-12-14 09:57:23,766 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 56 treesize of output 62 [2022-12-14 09:57:23,872 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 14 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:23,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:57:24,821 INFO L321 Elim1Store]: treesize reduction 26, result has 60.6 percent of original size [2022-12-14 09:57:24,821 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 312 treesize of output 320 [2022-12-14 09:57:24,841 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:57:24,841 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 54 treesize of output 54 [2022-12-14 09:57:24,857 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 20 treesize of output 18 [2022-12-14 09:57:25,010 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:57:25,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 113 treesize of output 146 [2022-12-14 09:57:26,088 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 17 proven. 159 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:26,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388231493] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:57:26,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [666221560] [2022-12-14 09:57:26,089 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:57:26,089 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:57:26,089 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:57:26,089 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:57:26,089 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:57:26,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:26,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:57:26,133 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 11 treesize of output 7 [2022-12-14 09:57:26,158 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 [2022-12-14 09:57:26,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:57:26,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:57:26,255 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:57:26,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:57:26,583 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:57:29,533 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '56295#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 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_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 09:57:29,533 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:57:29,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:57:29,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26, 26] total 69 [2022-12-14 09:57:29,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215585204] [2022-12-14 09:57:29,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:57:29,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-12-14 09:57:29,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:57:29,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-12-14 09:57:29,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=6397, Unknown=0, NotChecked=0, Total=6642 [2022-12-14 09:57:29,534 INFO L87 Difference]: Start difference. First operand 2107 states and 2511 transitions. Second operand has 70 states, 70 states have (on average 2.5142857142857142) internal successors, (176), 69 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:36,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:57:36,771 INFO L93 Difference]: Finished difference Result 4428 states and 5203 transitions. [2022-12-14 09:57:36,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-14 09:57:36,772 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.5142857142857142) internal successors, (176), 69 states have internal predecessors, (176), 0 states have call successors, (0), 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 [2022-12-14 09:57:36,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:57:36,775 INFO L225 Difference]: With dead ends: 4428 [2022-12-14 09:57:36,775 INFO L226 Difference]: Without dead ends: 3024 [2022-12-14 09:57:36,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=926, Invalid=15586, Unknown=0, NotChecked=0, Total=16512 [2022-12-14 09:57:36,776 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 801 mSDsluCounter, 2946 mSDsCounter, 0 mSdLazyCounter, 4643 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 801 SdHoareTripleChecker+Valid, 3027 SdHoareTripleChecker+Invalid, 4660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 4643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:57:36,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [801 Valid, 3027 Invalid, 4660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 4643 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 09:57:36,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2022-12-14 09:57:36,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 2170. [2022-12-14 09:57:36,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2168 states have (on average 1.1928044280442804) internal successors, (2586), 2169 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:36,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 2586 transitions. [2022-12-14 09:57:36,795 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 2586 transitions. Word has length 61 [2022-12-14 09:57:36,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:57:36,795 INFO L495 AbstractCegarLoop]: Abstraction has 2170 states and 2586 transitions. [2022-12-14 09:57:36,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.5142857142857142) internal successors, (176), 69 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:36,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 2586 transitions. [2022-12-14 09:57:36,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 09:57:36,796 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:57:36,796 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:57:36,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-12-14 09:57:36,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:57:36,997 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:57:36,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:57:36,998 INFO L85 PathProgramCache]: Analyzing trace with hash 2115185901, now seen corresponding path program 17 times [2022-12-14 09:57:36,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:57:36,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633911953] [2022-12-14 09:57:36,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:57:37,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:57:37,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:57:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 49 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:37,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:57:37,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633911953] [2022-12-14 09:57:37,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633911953] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:57:37,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571368031] [2022-12-14 09:57:37,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:57:37,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:57:37,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:57:37,610 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:57:37,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-14 09:57:37,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-12-14 09:57:37,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:57:37,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 83 conjunts are in the unsatisfiable core [2022-12-14 09:57:37,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:57:38,254 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 64 proven. 179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:38,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:57:38,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 09:57:38,811 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 64 proven. 179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:38,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571368031] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:57:38,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1727567369] [2022-12-14 09:57:38,813 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:57:38,813 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:57:38,813 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:57:38,813 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:57:38,813 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:57:38,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:38,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:57:38,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:57:38,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:57:38,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:57:38,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:57:38,992 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:57:38,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:57:39,191 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:57:41,005 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '63433#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 09:57:41,005 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:57:41,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:57:41,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 61 [2022-12-14 09:57:41,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032266242] [2022-12-14 09:57:41,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:57:41,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-12-14 09:57:41,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:57:41,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-12-14 09:57:41,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=576, Invalid=4826, Unknown=0, NotChecked=0, Total=5402 [2022-12-14 09:57:41,006 INFO L87 Difference]: Start difference. First operand 2170 states and 2586 transitions. Second operand has 62 states, 61 states have (on average 2.737704918032787) internal successors, (167), 62 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:42,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:57:42,306 INFO L93 Difference]: Finished difference Result 2492 states and 2912 transitions. [2022-12-14 09:57:42,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-14 09:57:42,306 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 2.737704918032787) internal successors, (167), 62 states have internal predecessors, (167), 0 states have call successors, (0), 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 [2022-12-14 09:57:42,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:57:42,310 INFO L225 Difference]: With dead ends: 2492 [2022-12-14 09:57:42,310 INFO L226 Difference]: Without dead ends: 2492 [2022-12-14 09:57:42,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 129 SyntacticMatches, 10 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3397 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1712, Invalid=9418, Unknown=0, NotChecked=0, Total=11130 [2022-12-14 09:57:42,310 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 645 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 951 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:57:42,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [645 Valid, 951 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1242 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:57:42,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2022-12-14 09:57:42,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 2226. [2022-12-14 09:57:42,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2226 states, 2224 states have (on average 1.193794964028777) internal successors, (2655), 2225 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:42,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 2655 transitions. [2022-12-14 09:57:42,328 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 2655 transitions. Word has length 63 [2022-12-14 09:57:42,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:57:42,328 INFO L495 AbstractCegarLoop]: Abstraction has 2226 states and 2655 transitions. [2022-12-14 09:57:42,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 2.737704918032787) internal successors, (167), 62 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:42,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 2655 transitions. [2022-12-14 09:57:42,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 09:57:42,329 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:57:42,329 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2022-12-14 09:57:42,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-14 09:57:42,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:57:42,530 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:57:42,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:57:42,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1233177536, now seen corresponding path program 13 times [2022-12-14 09:57:42,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:57:42,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042131416] [2022-12-14 09:57:42,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:57:42,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:57:42,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:57:42,953 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 36 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:42,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:57:42,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042131416] [2022-12-14 09:57:42,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042131416] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:57:42,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829702640] [2022-12-14 09:57:42,953 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:57:42,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:57:42,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:57:42,954 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:57:42,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-14 09:57:43,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:57:43,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 81 conjunts are in the unsatisfiable core [2022-12-14 09:57:43,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:57:43,199 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 36 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:43,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:57:43,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 09:57:43,564 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 36 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:43,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829702640] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:57:43,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1898430666] [2022-12-14 09:57:43,565 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:57:43,565 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:57:43,565 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:57:43,565 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:57:43,565 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:57:43,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:43,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:57:43,605 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 11 treesize of output 7 [2022-12-14 09:57:43,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:57:43,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:57:43,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:57:43,715 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:57:43,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:57:44,036 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:57:46,273 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '68632#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 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_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 09:57:46,273 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:57:46,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:57:46,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 31 [2022-12-14 09:57:46,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967282486] [2022-12-14 09:57:46,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:57:46,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 09:57:46,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:57:46,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 09:57:46,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1803, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 09:57:46,275 INFO L87 Difference]: Start difference. First operand 2226 states and 2655 transitions. Second operand has 33 states, 32 states have (on average 3.46875) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:47,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:57:47,033 INFO L93 Difference]: Finished difference Result 3406 states and 4039 transitions. [2022-12-14 09:57:47,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 09:57:47,034 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.46875) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 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 [2022-12-14 09:57:47,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:57:47,038 INFO L225 Difference]: With dead ends: 3406 [2022-12-14 09:57:47,038 INFO L226 Difference]: Without dead ends: 3406 [2022-12-14 09:57:47,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 155 SyntacticMatches, 8 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=506, Invalid=3400, Unknown=0, NotChecked=0, Total=3906 [2022-12-14 09:57:47,038 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 317 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 1424 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 09:57:47,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 896 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1424 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 09:57:47,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3406 states. [2022-12-14 09:57:47,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3406 to 2468. [2022-12-14 09:57:47,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2468 states, 2466 states have (on average 1.1938361719383617) internal successors, (2944), 2467 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:47,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2468 states to 2468 states and 2944 transitions. [2022-12-14 09:57:47,060 INFO L78 Accepts]: Start accepts. Automaton has 2468 states and 2944 transitions. Word has length 63 [2022-12-14 09:57:47,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:57:47,060 INFO L495 AbstractCegarLoop]: Abstraction has 2468 states and 2944 transitions. [2022-12-14 09:57:47,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.46875) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:47,060 INFO L276 IsEmpty]: Start isEmpty. Operand 2468 states and 2944 transitions. [2022-12-14 09:57:47,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 09:57:47,061 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:57:47,061 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:57:47,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-14 09:57:47,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:57:47,262 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:57:47,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:57:47,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1218831758, now seen corresponding path program 18 times [2022-12-14 09:57:47,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:57:47,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408696971] [2022-12-14 09:57:47,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:57:47,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:57:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:57:47,935 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 20 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:47,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:57:47,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408696971] [2022-12-14 09:57:47,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408696971] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:57:47,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128129999] [2022-12-14 09:57:47,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:57:47,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:57:47,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:57:47,936 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:57:47,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-14 09:57:48,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:57:48,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:57:48,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 118 conjunts are in the unsatisfiable core [2022-12-14 09:57:48,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:57:48,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:57:48,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 09:57:48,450 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 20 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:48,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:57:48,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-14 09:57:48,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:57:48,607 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 20 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:48,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128129999] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:57:48,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1371148466] [2022-12-14 09:57:48,608 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:57:48,608 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:57:48,608 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:57:48,608 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:57:48,608 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:57:48,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:48,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:57:48,658 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 11 treesize of output 7 [2022-12-14 09:57:48,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:57:48,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:57:48,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:57:48,769 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:57:48,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:57:48,961 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:57:51,000 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '74997#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 09:57:51,000 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:57:51,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:57:51,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 47 [2022-12-14 09:57:51,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545235119] [2022-12-14 09:57:51,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:57:51,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-14 09:57:51,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:57:51,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-14 09:57:51,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=3227, Unknown=0, NotChecked=0, Total=3422 [2022-12-14 09:57:51,001 INFO L87 Difference]: Start difference. First operand 2468 states and 2944 transitions. Second operand has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:53,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:57:53,434 INFO L93 Difference]: Finished difference Result 3459 states and 4059 transitions. [2022-12-14 09:57:53,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-12-14 09:57:53,435 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-12-14 09:57:53,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:57:53,438 INFO L225 Difference]: With dead ends: 3459 [2022-12-14 09:57:53,438 INFO L226 Difference]: Without dead ends: 3019 [2022-12-14 09:57:53,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 167 SyntacticMatches, 3 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2503 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=819, Invalid=10311, Unknown=0, NotChecked=0, Total=11130 [2022-12-14 09:57:53,438 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 699 mSDsluCounter, 3270 mSDsCounter, 0 mSdLazyCounter, 3815 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 3399 SdHoareTripleChecker+Invalid, 3830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 3815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:57:53,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [699 Valid, 3399 Invalid, 3830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 3815 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 09:57:53,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2022-12-14 09:57:53,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 2824. [2022-12-14 09:57:53,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2824 states, 2822 states have (on average 1.1956059532246635) internal successors, (3374), 2823 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:53,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 3374 transitions. [2022-12-14 09:57:53,465 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 3374 transitions. Word has length 67 [2022-12-14 09:57:53,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:57:53,465 INFO L495 AbstractCegarLoop]: Abstraction has 2824 states and 3374 transitions. [2022-12-14 09:57:53,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:53,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 3374 transitions. [2022-12-14 09:57:53,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-14 09:57:53,466 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:57:53,466 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:57:53,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-14 09:57:53,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:57:53,667 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:57:53,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:57:53,668 INFO L85 PathProgramCache]: Analyzing trace with hash -267285360, now seen corresponding path program 19 times [2022-12-14 09:57:53,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:57:53,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341518321] [2022-12-14 09:57:53,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:57:53,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:57:53,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:57:54,394 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 64 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:54,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:57:54,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341518321] [2022-12-14 09:57:54,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341518321] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:57:54,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622732324] [2022-12-14 09:57:54,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:57:54,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:57:54,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:57:54,395 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:57:54,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-14 09:57:54,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:57:54,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 108 conjunts are in the unsatisfiable core [2022-12-14 09:57:54,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:57:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 81 proven. 219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:54,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:57:55,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 09:57:55,378 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 81 proven. 219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:55,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622732324] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:57:55,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1585449945] [2022-12-14 09:57:55,379 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:57:55,379 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:57:55,379 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:57:55,379 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:57:55,380 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:57:55,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:57:55,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:57:55,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:57:55,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:57:55,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:57:55,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:57:55,536 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:57:55,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:57:55,728 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:57:57,877 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '81850#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 09:57:57,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:57:57,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:57:57,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 55 [2022-12-14 09:57:57,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380990158] [2022-12-14 09:57:57,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:57:57,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-12-14 09:57:57,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:57:57,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-12-14 09:57:57,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=4142, Unknown=0, NotChecked=0, Total=4556 [2022-12-14 09:57:57,879 INFO L87 Difference]: Start difference. First operand 2824 states and 3374 transitions. Second operand has 56 states, 55 states have (on average 2.6) internal successors, (143), 56 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:59,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:57:59,606 INFO L93 Difference]: Finished difference Result 3199 states and 3753 transitions. [2022-12-14 09:57:59,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 09:57:59,606 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.6) internal successors, (143), 56 states have internal predecessors, (143), 0 states have call successors, (0), 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 [2022-12-14 09:57:59,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:57:59,611 INFO L225 Difference]: With dead ends: 3199 [2022-12-14 09:57:59,611 INFO L226 Difference]: Without dead ends: 3199 [2022-12-14 09:57:59,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 154 SyntacticMatches, 11 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2885 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1600, Invalid=8906, Unknown=0, NotChecked=0, Total=10506 [2022-12-14 09:57:59,611 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 536 mSDsluCounter, 1664 mSDsCounter, 0 mSdLazyCounter, 2831 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 1736 SdHoareTripleChecker+Invalid, 2833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 09:57:59,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 1736 Invalid, 2833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2831 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 09:57:59,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3199 states. [2022-12-14 09:57:59,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3199 to 2884. [2022-12-14 09:57:59,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2884 states, 2882 states have (on average 1.1963913948646774) internal successors, (3448), 2883 states have internal predecessors, (3448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:59,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2884 states to 2884 states and 3448 transitions. [2022-12-14 09:57:59,633 INFO L78 Accepts]: Start accepts. Automaton has 2884 states and 3448 transitions. Word has length 69 [2022-12-14 09:57:59,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:57:59,633 INFO L495 AbstractCegarLoop]: Abstraction has 2884 states and 3448 transitions. [2022-12-14 09:57:59,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.6) internal successors, (143), 56 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:59,634 INFO L276 IsEmpty]: Start isEmpty. Operand 2884 states and 3448 transitions. [2022-12-14 09:57:59,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-14 09:57:59,635 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:57:59,635 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2022-12-14 09:57:59,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-14 09:57:59,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-12-14 09:57:59,836 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:57:59,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:57:59,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1064339509, now seen corresponding path program 14 times [2022-12-14 09:57:59,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:57:59,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717138644] [2022-12-14 09:57:59,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:57:59,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:57:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 16 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:00,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:58:00,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717138644] [2022-12-14 09:58:00,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717138644] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:58:00,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873228182] [2022-12-14 09:58:00,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:58:00,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:58:00,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:58:00,544 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:58:00,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-14 09:58:00,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-14 09:58:00,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:58:00,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 105 conjunts are in the unsatisfiable core [2022-12-14 09:58:00,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:58:00,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-14 09:58:00,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:58:01,010 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 16 treesize of output 18 [2022-12-14 09:58:01,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 09:58:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 16 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:01,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:58:01,091 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1402 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1402) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 7 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-12-14 09:58:01,094 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:58:01,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 09:58:01,097 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:58:01,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-14 09:58:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 16 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:01,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873228182] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:58:01,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [729167544] [2022-12-14 09:58:01,192 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:58:01,192 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:58:01,192 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:58:01,192 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:58:01,192 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:58:01,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:01,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:58:01,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:58:01,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:58:01,277 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 [2022-12-14 09:58:01,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:58:01,349 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:58:01,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:58:01,692 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:58:03,437 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '88452#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 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_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 09:58:03,437 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:58:03,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:58:03,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 28 [2022-12-14 09:58:03,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427521018] [2022-12-14 09:58:03,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:58:03,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 09:58:03,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:58:03,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 09:58:03,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1449, Unknown=1, NotChecked=76, Total=1640 [2022-12-14 09:58:03,438 INFO L87 Difference]: Start difference. First operand 2884 states and 3448 transitions. Second operand has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 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) [2022-12-14 09:58:04,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:58:04,670 INFO L93 Difference]: Finished difference Result 6257 states and 7394 transitions. [2022-12-14 09:58:04,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-14 09:58:04,670 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 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 69 [2022-12-14 09:58:04,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:58:04,673 INFO L225 Difference]: With dead ends: 6257 [2022-12-14 09:58:04,673 INFO L226 Difference]: Without dead ends: 4317 [2022-12-14 09:58:04,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 186 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=388, Invalid=5017, Unknown=1, NotChecked=144, Total=5550 [2022-12-14 09:58:04,674 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 392 mSDsluCounter, 1986 mSDsCounter, 0 mSdLazyCounter, 2574 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 2088 SdHoareTripleChecker+Invalid, 2762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 09:58:04,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 2088 Invalid, 2762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2574 Invalid, 0 Unknown, 178 Unchecked, 0.7s Time] [2022-12-14 09:58:04,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4317 states. [2022-12-14 09:58:04,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4317 to 2957. [2022-12-14 09:58:04,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2957 states, 2955 states have (on average 1.1962774957698816) internal successors, (3535), 2956 states have internal predecessors, (3535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:58:04,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2957 states to 2957 states and 3535 transitions. [2022-12-14 09:58:04,700 INFO L78 Accepts]: Start accepts. Automaton has 2957 states and 3535 transitions. Word has length 69 [2022-12-14 09:58:04,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:58:04,700 INFO L495 AbstractCegarLoop]: Abstraction has 2957 states and 3535 transitions. [2022-12-14 09:58:04,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 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) [2022-12-14 09:58:04,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2957 states and 3535 transitions. [2022-12-14 09:58:04,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 09:58:04,701 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:58:04,702 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2022-12-14 09:58:04,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-14 09:58:04,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-12-14 09:58:04,903 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:58:04,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:58:04,904 INFO L85 PathProgramCache]: Analyzing trace with hash -715915654, now seen corresponding path program 15 times [2022-12-14 09:58:04,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:58:04,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041073725] [2022-12-14 09:58:04,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:04,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:58:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:05,368 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 49 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:05,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:58:05,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041073725] [2022-12-14 09:58:05,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041073725] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:58:05,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385458323] [2022-12-14 09:58:05,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:58:05,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:58:05,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:58:05,370 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:58:05,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-14 09:58:05,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:58:05,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:58:05,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 95 conjunts are in the unsatisfiable core [2022-12-14 09:58:05,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:58:05,939 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 49 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:05,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:58:06,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-12-14 09:58:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 49 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:06,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385458323] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:58:06,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [818097027] [2022-12-14 09:58:06,440 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:58:06,440 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:58:06,440 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:58:06,440 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:58:06,440 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:58:06,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:06,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:58:06,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:58:06,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:58:06,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:58:06,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:58:06,609 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:58:06,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:58:06,960 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:58:08,991 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '98220#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 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_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 09:58:08,991 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:58:08,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:58:08,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 52 [2022-12-14 09:58:08,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317857812] [2022-12-14 09:58:08,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:58:08,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-14 09:58:08,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:58:08,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-14 09:58:08,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=3857, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 09:58:08,992 INFO L87 Difference]: Start difference. First operand 2957 states and 3535 transitions. Second operand has 54 states, 53 states have (on average 3.1132075471698113) internal successors, (165), 53 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:58:10,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:58:10,018 INFO L93 Difference]: Finished difference Result 4605 states and 5483 transitions. [2022-12-14 09:58:10,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 09:58:10,018 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 3.1132075471698113) internal successors, (165), 53 states have internal predecessors, (165), 0 states have call successors, (0), 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 [2022-12-14 09:58:10,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:58:10,024 INFO L225 Difference]: With dead ends: 4605 [2022-12-14 09:58:10,024 INFO L226 Difference]: Without dead ends: 4605 [2022-12-14 09:58:10,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1705 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1225, Invalid=6085, Unknown=0, NotChecked=0, Total=7310 [2022-12-14 09:58:10,025 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 663 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 2006 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 2006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 09:58:10,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 1193 Invalid, 2006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2006 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 09:58:10,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4605 states. [2022-12-14 09:58:10,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4605 to 3245. [2022-12-14 09:58:10,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3245 states, 3243 states have (on average 1.196423065063213) internal successors, (3880), 3244 states have internal predecessors, (3880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:58:10,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3245 states to 3245 states and 3880 transitions. [2022-12-14 09:58:10,067 INFO L78 Accepts]: Start accepts. Automaton has 3245 states and 3880 transitions. Word has length 71 [2022-12-14 09:58:10,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:58:10,068 INFO L495 AbstractCegarLoop]: Abstraction has 3245 states and 3880 transitions. [2022-12-14 09:58:10,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 3.1132075471698113) internal successors, (165), 53 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:58:10,068 INFO L276 IsEmpty]: Start isEmpty. Operand 3245 states and 3880 transitions. [2022-12-14 09:58:10,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 09:58:10,070 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:58:10,070 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:58:10,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-14 09:58:10,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:58:10,271 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:58:10,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:58:10,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1040838805, now seen corresponding path program 20 times [2022-12-14 09:58:10,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:58:10,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237748035] [2022-12-14 09:58:10,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:10,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:58:10,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:10,943 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 22 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:10,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:58:10,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237748035] [2022-12-14 09:58:10,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237748035] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:58:10,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256977017] [2022-12-14 09:58:10,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:58:10,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:58:10,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:58:10,944 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:58:10,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-14 09:58:11,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-12-14 09:58:11,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:58:11,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 130 conjunts are in the unsatisfiable core [2022-12-14 09:58:11,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:58:11,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:58:11,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 09:58:11,596 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 22 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:11,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:58:11,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-14 09:58:11,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:58:11,846 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 22 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:11,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256977017] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:58:11,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1697736811] [2022-12-14 09:58:11,847 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:58:11,848 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:58:11,848 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:58:11,848 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:58:11,848 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:58:11,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:11,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:58:11,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:58:11,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:58:11,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:58:11,980 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 [2022-12-14 09:58:12,024 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:58:12,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:58:12,231 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:58:14,135 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '106604#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 09:58:14,135 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:58:14,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:58:14,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 50 [2022-12-14 09:58:14,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108646830] [2022-12-14 09:58:14,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:58:14,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-14 09:58:14,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:58:14,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-14 09:58:14,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=3579, Unknown=0, NotChecked=0, Total=3782 [2022-12-14 09:58:14,136 INFO L87 Difference]: Start difference. First operand 3245 states and 3880 transitions. Second operand has 50 states, 50 states have (on average 2.18) internal successors, (109), 50 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:58:16,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:58:16,983 INFO L93 Difference]: Finished difference Result 4471 states and 5264 transitions. [2022-12-14 09:58:16,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-12-14 09:58:16,983 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.18) internal successors, (109), 50 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-12-14 09:58:16,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:58:16,988 INFO L225 Difference]: With dead ends: 4471 [2022-12-14 09:58:16,988 INFO L226 Difference]: Without dead ends: 3919 [2022-12-14 09:58:16,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 184 SyntacticMatches, 3 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2833 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=877, Invalid=11779, Unknown=0, NotChecked=0, Total=12656 [2022-12-14 09:58:16,989 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 681 mSDsluCounter, 4136 mSDsCounter, 0 mSdLazyCounter, 4637 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 4279 SdHoareTripleChecker+Invalid, 4653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 4637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:58:16,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [681 Valid, 4279 Invalid, 4653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 4637 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 09:58:16,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3919 states. [2022-12-14 09:58:17,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3919 to 3681. [2022-12-14 09:58:17,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3681 states, 3679 states have (on average 1.1981516716499048) internal successors, (4408), 3680 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:58:17,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3681 states to 3681 states and 4408 transitions. [2022-12-14 09:58:17,029 INFO L78 Accepts]: Start accepts. Automaton has 3681 states and 4408 transitions. Word has length 73 [2022-12-14 09:58:17,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:58:17,029 INFO L495 AbstractCegarLoop]: Abstraction has 3681 states and 4408 transitions. [2022-12-14 09:58:17,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.18) internal successors, (109), 50 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:58:17,030 INFO L276 IsEmpty]: Start isEmpty. Operand 3681 states and 4408 transitions. [2022-12-14 09:58:17,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-14 09:58:17,032 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:58:17,032 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:58:17,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-12-14 09:58:17,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-12-14 09:58:17,232 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:58:17,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:58:17,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1965108173, now seen corresponding path program 21 times [2022-12-14 09:58:17,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:58:17,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492024268] [2022-12-14 09:58:17,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:17,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:58:17,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:17,963 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 81 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:17,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:58:17,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492024268] [2022-12-14 09:58:17,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492024268] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:58:17,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952433109] [2022-12-14 09:58:17,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:58:17,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:58:17,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:58:17,965 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:58:17,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-14 09:58:18,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:58:18,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:58:18,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 123 conjunts are in the unsatisfiable core [2022-12-14 09:58:18,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:58:18,140 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 09:58:18,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 09:58:18,571 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 100 proven. 263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:18,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:58:19,518 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 100 proven. 263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:19,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952433109] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:58:19,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1519079711] [2022-12-14 09:58:19,518 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:58:19,519 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:58:19,519 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:58:19,519 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:58:19,519 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:58:19,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:19,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:58:19,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:58:19,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:58:19,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:58:19,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:58:19,672 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:58:19,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:58:19,872 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:58:22,149 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '115386#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 09:58:22,149 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:58:22,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:58:22,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 70 [2022-12-14 09:58:22,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885013527] [2022-12-14 09:58:22,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:58:22,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-12-14 09:58:22,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:58:22,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-12-14 09:58:22,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=771, Invalid=6201, Unknown=0, NotChecked=0, Total=6972 [2022-12-14 09:58:22,150 INFO L87 Difference]: Start difference. First operand 3681 states and 4408 transitions. Second operand has 72 states, 71 states have (on average 2.5492957746478875) internal successors, (181), 71 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) [2022-12-14 09:58:24,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:58:24,454 INFO L93 Difference]: Finished difference Result 4140 states and 4872 transitions. [2022-12-14 09:58:24,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-14 09:58:24,454 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 2.5492957746478875) internal successors, (181), 71 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 75 [2022-12-14 09:58:24,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:58:24,457 INFO L225 Difference]: With dead ends: 4140 [2022-12-14 09:58:24,457 INFO L226 Difference]: Without dead ends: 4140 [2022-12-14 09:58:24,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3725 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2615, Invalid=12147, Unknown=0, NotChecked=0, Total=14762 [2022-12-14 09:58:24,458 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 797 mSDsluCounter, 1633 mSDsCounter, 0 mSdLazyCounter, 2604 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 797 SdHoareTripleChecker+Valid, 1710 SdHoareTripleChecker+Invalid, 2606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:58:24,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [797 Valid, 1710 Invalid, 2606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2604 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 09:58:24,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4140 states. [2022-12-14 09:58:24,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4140 to 3749. [2022-12-14 09:58:24,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3749 states, 3747 states have (on average 1.1988257272484655) internal successors, (4492), 3748 states have internal predecessors, (4492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:58:24,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3749 states to 3749 states and 4492 transitions. [2022-12-14 09:58:24,486 INFO L78 Accepts]: Start accepts. Automaton has 3749 states and 4492 transitions. Word has length 75 [2022-12-14 09:58:24,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:58:24,486 INFO L495 AbstractCegarLoop]: Abstraction has 3749 states and 4492 transitions. [2022-12-14 09:58:24,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 2.5492957746478875) internal successors, (181), 71 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) [2022-12-14 09:58:24,487 INFO L276 IsEmpty]: Start isEmpty. Operand 3749 states and 4492 transitions. [2022-12-14 09:58:24,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 09:58:24,488 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:58:24,488 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2022-12-14 09:58:24,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-12-14 09:58:24,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:58:24,689 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:58:24,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:58:24,689 INFO L85 PathProgramCache]: Analyzing trace with hash 390999685, now seen corresponding path program 16 times [2022-12-14 09:58:24,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:58:24,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009832955] [2022-12-14 09:58:24,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:24,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:58:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:25,352 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 18 proven. 280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:25,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:58:25,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009832955] [2022-12-14 09:58:25,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009832955] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:58:25,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145315217] [2022-12-14 09:58:25,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:58:25,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:58:25,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:58:25,354 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:58:25,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-14 09:58:25,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:25,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 114 conjunts are in the unsatisfiable core [2022-12-14 09:58:25,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:58:25,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-14 09:58:25,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:58:25,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 09:58:26,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:58:26,730 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:58:26,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-12-14 09:58:26,736 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 18 proven. 280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:26,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:58:26,937 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:58:26,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 09:58:26,942 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:58:26,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2022-12-14 09:58:26,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:58:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 18 proven. 280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:27,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145315217] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:58:27,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1107918201] [2022-12-14 09:58:27,566 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:58:27,567 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:58:27,567 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:58:27,567 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:58:27,567 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:58:27,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:27,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:58:27,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:58:27,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:58:27,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:58:27,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:58:27,722 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:58:27,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:58:28,073 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:58:30,391 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '123883#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 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_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 09:58:30,391 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:58:30,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:58:30,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 63 [2022-12-14 09:58:30,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713507839] [2022-12-14 09:58:30,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:58:30,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-12-14 09:58:30,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:58:30,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-12-14 09:58:30,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=5477, Unknown=0, NotChecked=0, Total=5700 [2022-12-14 09:58:30,392 INFO L87 Difference]: Start difference. First operand 3749 states and 4492 transitions. Second operand has 64 states, 64 states have (on average 2.671875) internal successors, (171), 63 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) [2022-12-14 09:58:33,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:58:33,533 INFO L93 Difference]: Finished difference Result 8314 states and 9867 transitions. [2022-12-14 09:58:33,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-14 09:58:33,534 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.671875) internal successors, (171), 63 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 77 [2022-12-14 09:58:33,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:58:33,537 INFO L225 Difference]: With dead ends: 8314 [2022-12-14 09:58:33,537 INFO L226 Difference]: Without dead ends: 5718 [2022-12-14 09:58:33,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2982 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=692, Invalid=12190, Unknown=0, NotChecked=0, Total=12882 [2022-12-14 09:58:33,538 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 663 mSDsluCounter, 4289 mSDsCounter, 0 mSdLazyCounter, 5243 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 4405 SdHoareTripleChecker+Invalid, 5254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 5243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 09:58:33,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 4405 Invalid, 5254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 5243 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 09:58:33,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5718 states. [2022-12-14 09:58:33,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5718 to 3828. [2022-12-14 09:58:33,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 3826 states have (on average 1.1986408782017772) internal successors, (4586), 3827 states have internal predecessors, (4586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:58:33,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 4586 transitions. [2022-12-14 09:58:33,577 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 4586 transitions. Word has length 77 [2022-12-14 09:58:33,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:58:33,577 INFO L495 AbstractCegarLoop]: Abstraction has 3828 states and 4586 transitions. [2022-12-14 09:58:33,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.671875) internal successors, (171), 63 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) [2022-12-14 09:58:33,577 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 4586 transitions. [2022-12-14 09:58:33,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-12-14 09:58:33,579 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:58:33,579 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:58:33,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-12-14 09:58:33,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:58:33,780 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:58:33,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:58:33,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1680560456, now seen corresponding path program 22 times [2022-12-14 09:58:33,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:58:33,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799190752] [2022-12-14 09:58:33,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:33,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:58:33,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 24 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:34,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:58:34,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799190752] [2022-12-14 09:58:34,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799190752] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:58:34,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018609172] [2022-12-14 09:58:34,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:58:34,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:58:34,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:58:34,567 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:58:34,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-14 09:58:34,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:34,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 140 conjunts are in the unsatisfiable core [2022-12-14 09:58:34,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:58:35,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:58:35,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 09:58:35,168 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 24 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:35,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:58:35,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-14 09:58:35,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:58:35,407 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 24 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:35,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018609172] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:58:35,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1652653929] [2022-12-14 09:58:35,408 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:58:35,409 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:58:35,409 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:58:35,409 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:58:35,409 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:58:35,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:35,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:58:35,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:58:35,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:58:35,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:58:35,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:58:35,578 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:58:35,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:58:35,780 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:58:37,742 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '136634#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 09:58:37,742 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:58:37,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:58:37,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 53 [2022-12-14 09:58:37,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079246480] [2022-12-14 09:58:37,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:58:37,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-14 09:58:37,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:58:37,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-14 09:58:37,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=3949, Unknown=0, NotChecked=0, Total=4160 [2022-12-14 09:58:37,743 INFO L87 Difference]: Start difference. First operand 3828 states and 4586 transitions. Second operand has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:58:40,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:58:40,582 INFO L93 Difference]: Finished difference Result 5241 states and 6184 transitions. [2022-12-14 09:58:40,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-12-14 09:58:40,583 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-12-14 09:58:40,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:58:40,585 INFO L225 Difference]: With dead ends: 5241 [2022-12-14 09:58:40,585 INFO L226 Difference]: Without dead ends: 4565 [2022-12-14 09:58:40,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 201 SyntacticMatches, 3 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 3184 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=935, Invalid=13345, Unknown=0, NotChecked=0, Total=14280 [2022-12-14 09:58:40,586 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 670 mSDsluCounter, 4589 mSDsCounter, 0 mSdLazyCounter, 5142 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 4746 SdHoareTripleChecker+Invalid, 5159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 5142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:58:40,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 4746 Invalid, 5159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 5142 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 09:58:40,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4565 states. [2022-12-14 09:58:40,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4565 to 4302. [2022-12-14 09:58:40,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4302 states, 4300 states have (on average 1.2002325581395348) internal successors, (5161), 4301 states have internal predecessors, (5161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:58:40,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4302 states to 4302 states and 5161 transitions. [2022-12-14 09:58:40,634 INFO L78 Accepts]: Start accepts. Automaton has 4302 states and 5161 transitions. Word has length 79 [2022-12-14 09:58:40,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:58:40,634 INFO L495 AbstractCegarLoop]: Abstraction has 4302 states and 5161 transitions. [2022-12-14 09:58:40,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:58:40,634 INFO L276 IsEmpty]: Start isEmpty. Operand 4302 states and 5161 transitions. [2022-12-14 09:58:40,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-12-14 09:58:40,637 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:58:40,637 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2022-12-14 09:58:40,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-12-14 09:58:40,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-12-14 09:58:40,838 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:58:40,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:58:40,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1425315380, now seen corresponding path program 17 times [2022-12-14 09:58:40,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:58:40,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572918343] [2022-12-14 09:58:40,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:40,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:58:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:41,408 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 49 proven. 266 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:41,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:58:41,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572918343] [2022-12-14 09:58:41,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572918343] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:58:41,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38619007] [2022-12-14 09:58:41,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:58:41,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:58:41,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:58:41,409 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:58:41,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-14 09:58:41,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-12-14 09:58:41,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:58:41,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 84 conjunts are in the unsatisfiable core [2022-12-14 09:58:41,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:58:41,611 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 09:58:41,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 09:58:42,000 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 64 proven. 251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:42,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:58:42,684 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 64 proven. 251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:42,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38619007] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:58:42,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1873508835] [2022-12-14 09:58:42,685 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:58:42,685 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:58:42,685 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:58:42,686 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:58:42,686 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:58:42,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:42,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:58:42,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:58:42,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:58:42,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:58:42,834 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 [2022-12-14 09:58:42,878 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:58:42,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:58:43,263 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:58:45,759 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '146838#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 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_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 09:58:45,759 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:58:45,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:58:45,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 69 [2022-12-14 09:58:45,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598792433] [2022-12-14 09:58:45,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:58:45,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-12-14 09:58:45,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:58:45,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-12-14 09:58:45,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=714, Invalid=6092, Unknown=0, NotChecked=0, Total=6806 [2022-12-14 09:58:45,761 INFO L87 Difference]: Start difference. First operand 4302 states and 5161 transitions. Second operand has 71 states, 70 states have (on average 3.3857142857142857) internal successors, (237), 70 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:58:46,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:58:46,970 INFO L93 Difference]: Finished difference Result 6580 states and 7872 transitions. [2022-12-14 09:58:46,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-14 09:58:46,971 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 3.3857142857142857) internal successors, (237), 70 states have internal predecessors, (237), 0 states have call successors, (0), 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 79 [2022-12-14 09:58:46,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:58:46,974 INFO L225 Difference]: With dead ends: 6580 [2022-12-14 09:58:46,974 INFO L226 Difference]: Without dead ends: 6580 [2022-12-14 09:58:46,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3148 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1776, Invalid=9144, Unknown=0, NotChecked=0, Total=10920 [2022-12-14 09:58:46,975 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 662 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 1714 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 1714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 09:58:46,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [662 Valid, 1121 Invalid, 1714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1714 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 09:58:46,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6580 states. [2022-12-14 09:58:47,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6580 to 4690. [2022-12-14 09:58:47,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4690 states, 4688 states have (on average 1.2005119453924915) internal successors, (5628), 4689 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:58:47,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4690 states to 4690 states and 5628 transitions. [2022-12-14 09:58:47,015 INFO L78 Accepts]: Start accepts. Automaton has 4690 states and 5628 transitions. Word has length 79 [2022-12-14 09:58:47,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:58:47,016 INFO L495 AbstractCegarLoop]: Abstraction has 4690 states and 5628 transitions. [2022-12-14 09:58:47,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 3.3857142857142857) internal successors, (237), 70 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:58:47,016 INFO L276 IsEmpty]: Start isEmpty. Operand 4690 states and 5628 transitions. [2022-12-14 09:58:47,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-14 09:58:47,017 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:58:47,017 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:58:47,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-12-14 09:58:47,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:58:47,219 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:58:47,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:58:47,220 INFO L85 PathProgramCache]: Analyzing trace with hash -968105002, now seen corresponding path program 23 times [2022-12-14 09:58:47,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:58:47,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748615506] [2022-12-14 09:58:47,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:47,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:58:47,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:48,014 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 100 proven. 332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:48,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:58:48,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748615506] [2022-12-14 09:58:48,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748615506] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:58:48,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921489811] [2022-12-14 09:58:48,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:58:48,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:58:48,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:58:48,015 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:58:48,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-14 09:58:48,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-12-14 09:58:48,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:58:48,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 105 conjunts are in the unsatisfiable core [2022-12-14 09:58:48,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:58:48,351 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 09:58:48,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 09:58:49,024 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 121 proven. 311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:49,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:58:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 121 proven. 311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:50,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921489811] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:58:50,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1447041364] [2022-12-14 09:58:50,213 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:58:50,213 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:58:50,213 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:58:50,213 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:58:50,213 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:58:50,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:50,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:58:50,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:58:50,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:58:50,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:58:50,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:58:50,370 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:58:50,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:58:50,549 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:58:52,600 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '158734#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 09:58:52,600 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:58:52,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:58:52,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 89 [2022-12-14 09:58:52,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170834265] [2022-12-14 09:58:52,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:58:52,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-12-14 09:58:52,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:58:52,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-12-14 09:58:52,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1134, Invalid=9168, Unknown=0, NotChecked=0, Total=10302 [2022-12-14 09:58:52,601 INFO L87 Difference]: Start difference. First operand 4690 states and 5628 transitions. Second operand has 90 states, 89 states have (on average 2.7191011235955056) internal successors, (242), 90 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:58:55,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:58:55,071 INFO L93 Difference]: Finished difference Result 5241 states and 6185 transitions. [2022-12-14 09:58:55,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-12-14 09:58:55,071 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 89 states have (on average 2.7191011235955056) internal successors, (242), 90 states have internal predecessors, (242), 0 states have call successors, (0), 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 [2022-12-14 09:58:55,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:58:55,074 INFO L225 Difference]: With dead ends: 5241 [2022-12-14 09:58:55,074 INFO L226 Difference]: Without dead ends: 5241 [2022-12-14 09:58:55,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5672 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=3394, Invalid=16912, Unknown=0, NotChecked=0, Total=20306 [2022-12-14 09:58:55,075 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 703 mSDsluCounter, 1643 mSDsCounter, 0 mSdLazyCounter, 2456 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 1725 SdHoareTripleChecker+Invalid, 2458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 09:58:55,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [703 Valid, 1725 Invalid, 2458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2456 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 09:58:55,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5241 states. [2022-12-14 09:58:55,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5241 to 4766. [2022-12-14 09:58:55,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4766 states, 4764 states have (on average 1.2010915197313181) internal successors, (5722), 4765 states have internal predecessors, (5722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:58:55,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4766 states to 4766 states and 5722 transitions. [2022-12-14 09:58:55,111 INFO L78 Accepts]: Start accepts. Automaton has 4766 states and 5722 transitions. Word has length 81 [2022-12-14 09:58:55,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:58:55,111 INFO L495 AbstractCegarLoop]: Abstraction has 4766 states and 5722 transitions. [2022-12-14 09:58:55,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 89 states have (on average 2.7191011235955056) internal successors, (242), 90 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:58:55,111 INFO L276 IsEmpty]: Start isEmpty. Operand 4766 states and 5722 transitions. [2022-12-14 09:58:55,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-14 09:58:55,113 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:58:55,113 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:58:55,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-12-14 09:58:55,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:58:55,314 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:58:55,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:58:55,315 INFO L85 PathProgramCache]: Analyzing trace with hash 890975451, now seen corresponding path program 24 times [2022-12-14 09:58:55,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:58:55,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362033390] [2022-12-14 09:58:55,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:55,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:58:55,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:56,281 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 26 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:56,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:58:56,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362033390] [2022-12-14 09:58:56,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362033390] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:58:56,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670172038] [2022-12-14 09:58:56,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:58:56,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:58:56,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:58:56,283 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:58:56,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-14 09:58:56,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:58:56,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:58:56,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 152 conjunts are in the unsatisfiable core [2022-12-14 09:58:56,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:58:56,829 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 [2022-12-14 09:58:58,272 INFO L321 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2022-12-14 09:58:58,273 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 28 treesize of output 18 [2022-12-14 09:58:58,276 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 27 proven. 455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:58,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:58:59,124 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 31 treesize of output 27 [2022-12-14 09:58:59,126 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:58:59,127 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 31 treesize of output 23 [2022-12-14 09:58:59,322 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 30 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:59,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670172038] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:58:59,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [520392936] [2022-12-14 09:58:59,323 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:58:59,323 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:58:59,324 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:58:59,324 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:58:59,324 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:58:59,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:59,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:58:59,372 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 [2022-12-14 09:58:59,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:58:59,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:58:59,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:58:59,485 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:58:59,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:58:59,695 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:59:02,209 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '169424#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 09:59:02,209 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:59:02,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:59:02,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 35] total 85 [2022-12-14 09:59:02,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897004713] [2022-12-14 09:59:02,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:59:02,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-12-14 09:59:02,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:59:02,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-12-14 09:59:02,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=8941, Unknown=0, NotChecked=0, Total=9312 [2022-12-14 09:59:02,210 INFO L87 Difference]: Start difference. First operand 4766 states and 5722 transitions. Second operand has 85 states, 85 states have (on average 2.611764705882353) internal successors, (222), 85 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:59:12,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:59:12,890 INFO L93 Difference]: Finished difference Result 6596 states and 7765 transitions. [2022-12-14 09:59:12,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-12-14 09:59:12,891 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.611764705882353) internal successors, (222), 85 states have internal predecessors, (222), 0 states have call successors, (0), 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 [2022-12-14 09:59:12,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:59:12,894 INFO L225 Difference]: With dead ends: 6596 [2022-12-14 09:59:12,894 INFO L226 Difference]: Without dead ends: 5868 [2022-12-14 09:59:12,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 13 DeprecatedPredicates, 9457 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=1970, Invalid=33562, Unknown=0, NotChecked=0, Total=35532 [2022-12-14 09:59:12,895 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 1242 mSDsluCounter, 7702 mSDsCounter, 0 mSdLazyCounter, 8399 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1242 SdHoareTripleChecker+Valid, 7920 SdHoareTripleChecker+Invalid, 8426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 8399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:59:12,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1242 Valid, 7920 Invalid, 8426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 8399 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-12-14 09:59:12,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5868 states. [2022-12-14 09:59:12,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5868 to 5330. [2022-12-14 09:59:12,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5330 states, 5328 states have (on average 1.2027027027027026) internal successors, (6408), 5329 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:59:12,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5330 states to 5330 states and 6408 transitions. [2022-12-14 09:59:12,932 INFO L78 Accepts]: Start accepts. Automaton has 5330 states and 6408 transitions. Word has length 85 [2022-12-14 09:59:12,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:59:12,932 INFO L495 AbstractCegarLoop]: Abstraction has 5330 states and 6408 transitions. [2022-12-14 09:59:12,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.611764705882353) internal successors, (222), 85 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:59:12,933 INFO L276 IsEmpty]: Start isEmpty. Operand 5330 states and 6408 transitions. [2022-12-14 09:59:12,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-14 09:59:12,934 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:59:12,934 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2022-12-14 09:59:12,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-12-14 09:59:13,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:59:13,135 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:59:13,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:59:13,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1691839809, now seen corresponding path program 18 times [2022-12-14 09:59:13,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:59:13,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232503445] [2022-12-14 09:59:13,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:59:13,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:59:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:59:14,033 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 20 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:59:14,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:59:14,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232503445] [2022-12-14 09:59:14,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232503445] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:59:14,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444827101] [2022-12-14 09:59:14,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:59:14,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:59:14,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:59:14,035 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:59:14,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-14 09:59:14,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:59:14,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:59:14,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 148 conjunts are in the unsatisfiable core [2022-12-14 09:59:14,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:59:14,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:59:14,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:14,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-12-14 09:59:16,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:59:16,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:16,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:59:16,761 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-12-14 09:59:16,761 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 6 case distinctions, treesize of input 34 treesize of output 21 [2022-12-14 09:59:16,768 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 20 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:59:16,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:59:17,105 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:59:17,105 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 85 treesize of output 75 [2022-12-14 09:59:17,927 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 26 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:59:17,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444827101] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:59:17,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [670972077] [2022-12-14 09:59:17,928 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:59:17,928 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:59:17,928 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:59:17,928 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:59:17,928 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:59:17,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:17,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:59:17,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:59:17,999 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 [2022-12-14 09:59:18,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:59:18,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:59:18,087 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:59:18,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:59:18,459 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:59:21,402 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '182126#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 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_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 09:59:21,403 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:59:21,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:59:21,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 32, 31] total 75 [2022-12-14 09:59:21,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159459010] [2022-12-14 09:59:21,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:59:21,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-12-14 09:59:21,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:59:21,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-12-14 09:59:21,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=7371, Unknown=0, NotChecked=0, Total=7656 [2022-12-14 09:59:21,404 INFO L87 Difference]: Start difference. First operand 5330 states and 6408 transitions. Second operand has 76 states, 76 states have (on average 2.539473684210526) internal successors, (193), 75 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:59:28,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:59:28,107 INFO L93 Difference]: Finished difference Result 11883 states and 14173 transitions. [2022-12-14 09:59:28,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-12-14 09:59:28,108 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.539473684210526) internal successors, (193), 75 states have internal predecessors, (193), 0 states have call successors, (0), 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 [2022-12-14 09:59:28,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:59:28,112 INFO L225 Difference]: With dead ends: 11883 [2022-12-14 09:59:28,112 INFO L226 Difference]: Without dead ends: 7957 [2022-12-14 09:59:28,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6042 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=1442, Invalid=25948, Unknown=0, NotChecked=0, Total=27390 [2022-12-14 09:59:28,113 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 1327 mSDsluCounter, 4520 mSDsCounter, 0 mSdLazyCounter, 6230 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1327 SdHoareTripleChecker+Valid, 4642 SdHoareTripleChecker+Invalid, 6251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 6230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:59:28,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1327 Valid, 4642 Invalid, 6251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 6230 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 09:59:28,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7957 states. [2022-12-14 09:59:28,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7957 to 5417. [2022-12-14 09:59:28,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5417 states, 5415 states have (on average 1.2024007386888274) internal successors, (6511), 5416 states have internal predecessors, (6511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:59:28,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5417 states to 5417 states and 6511 transitions. [2022-12-14 09:59:28,175 INFO L78 Accepts]: Start accepts. Automaton has 5417 states and 6511 transitions. Word has length 85 [2022-12-14 09:59:28,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:59:28,175 INFO L495 AbstractCegarLoop]: Abstraction has 5417 states and 6511 transitions. [2022-12-14 09:59:28,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.539473684210526) internal successors, (193), 75 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:59:28,175 INFO L276 IsEmpty]: Start isEmpty. Operand 5417 states and 6511 transitions. [2022-12-14 09:59:28,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 09:59:28,178 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:59:28,179 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:59:28,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-12-14 09:59:28,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:59:28,380 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:59:28,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:59:28,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1200724857, now seen corresponding path program 25 times [2022-12-14 09:59:28,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:59:28,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389140951] [2022-12-14 09:59:28,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:59:28,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:59:28,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:59:29,250 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 121 proven. 386 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:59:29,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:59:29,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389140951] [2022-12-14 09:59:29,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389140951] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:59:29,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321103847] [2022-12-14 09:59:29,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:59:29,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:59:29,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:59:29,251 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:59:29,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-14 09:59:29,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:59:29,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 135 conjunts are in the unsatisfiable core [2022-12-14 09:59:29,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:59:29,752 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 144 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:59:29,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:59:30,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 09:59:30,426 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 144 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:59:30,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321103847] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:59:30,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1711835809] [2022-12-14 09:59:30,427 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:59:30,427 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:59:30,427 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:59:30,428 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:59:30,428 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:59:30,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:30,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:59:30,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:59:30,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:59:30,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:59:30,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:59:30,577 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:59:30,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:59:30,807 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:59:32,651 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '200178#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 09:59:32,651 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:59:32,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:59:32,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 67 [2022-12-14 09:59:32,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923172039] [2022-12-14 09:59:32,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:59:32,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-14 09:59:32,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:59:32,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-14 09:59:32,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=582, Invalid=5738, Unknown=0, NotChecked=0, Total=6320 [2022-12-14 09:59:32,653 INFO L87 Difference]: Start difference. First operand 5417 states and 6511 transitions. Second operand has 68 states, 67 states have (on average 2.671641791044776) internal successors, (179), 68 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:59:34,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:59:34,888 INFO L93 Difference]: Finished difference Result 6037 states and 7137 transitions. [2022-12-14 09:59:34,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-12-14 09:59:34,888 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 2.671641791044776) internal successors, (179), 68 states have internal predecessors, (179), 0 states have call successors, (0), 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 87 [2022-12-14 09:59:34,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:59:34,891 INFO L225 Difference]: With dead ends: 6037 [2022-12-14 09:59:34,891 INFO L226 Difference]: Without dead ends: 6037 [2022-12-14 09:59:34,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 199 SyntacticMatches, 14 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4258 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2401, Invalid=12851, Unknown=0, NotChecked=0, Total=15252 [2022-12-14 09:59:34,892 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 985 mSDsluCounter, 1931 mSDsCounter, 0 mSdLazyCounter, 3093 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 985 SdHoareTripleChecker+Valid, 2018 SdHoareTripleChecker+Invalid, 3095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 09:59:34,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [985 Valid, 2018 Invalid, 3095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3093 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 09:59:34,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6037 states. [2022-12-14 09:59:34,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6037 to 5497. [2022-12-14 09:59:34,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5497 states, 5495 states have (on average 1.202911737943585) internal successors, (6610), 5496 states have internal predecessors, (6610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:59:34,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5497 states to 5497 states and 6610 transitions. [2022-12-14 09:59:34,935 INFO L78 Accepts]: Start accepts. Automaton has 5497 states and 6610 transitions. Word has length 87 [2022-12-14 09:59:34,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:59:34,935 INFO L495 AbstractCegarLoop]: Abstraction has 5497 states and 6610 transitions. [2022-12-14 09:59:34,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 2.671641791044776) internal successors, (179), 68 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:59:34,935 INFO L276 IsEmpty]: Start isEmpty. Operand 5497 states and 6610 transitions. [2022-12-14 09:59:34,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 09:59:34,937 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:59:34,937 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2022-12-14 09:59:34,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-12-14 09:59:35,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-12-14 09:59:35,138 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:59:35,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:59:35,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1237329042, now seen corresponding path program 19 times [2022-12-14 09:59:35,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:59:35,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149427348] [2022-12-14 09:59:35,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:59:35,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:59:35,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:59:35,862 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 64 proven. 326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:59:35,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:59:35,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149427348] [2022-12-14 09:59:35,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149427348] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:59:35,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810175685] [2022-12-14 09:59:35,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:59:35,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:59:35,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:59:35,863 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:59:35,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-12-14 09:59:35,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:59:35,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 108 conjunts are in the unsatisfiable core [2022-12-14 09:59:36,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:59:36,333 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 81 proven. 309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:59:36,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:59:36,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 09:59:36,855 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 81 proven. 309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:59:36,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810175685] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:59:36,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1266347020] [2022-12-14 09:59:36,856 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:59:36,856 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:59:36,856 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:59:36,856 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:59:36,856 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:59:36,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:36,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:59:36,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:59:36,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:59:36,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:59:36,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:59:36,997 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:59:36,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:59:37,311 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:59:39,691 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '212383#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 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_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 09:59:39,691 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:59:39,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:59:39,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 53 [2022-12-14 09:59:39,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229194751] [2022-12-14 09:59:39,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:59:39,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-14 09:59:39,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:59:39,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-14 09:59:39,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=4031, Unknown=0, NotChecked=0, Total=4422 [2022-12-14 09:59:39,692 INFO L87 Difference]: Start difference. First operand 5497 states and 6610 transitions. Second operand has 55 states, 54 states have (on average 3.2962962962962963) internal successors, (178), 54 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:59:41,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:59:41,298 INFO L93 Difference]: Finished difference Result 8667 states and 10402 transitions. [2022-12-14 09:59:41,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-14 09:59:41,298 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 3.2962962962962963) internal successors, (178), 54 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2022-12-14 09:59:41,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:59:41,304 INFO L225 Difference]: With dead ends: 8667 [2022-12-14 09:59:41,304 INFO L226 Difference]: Without dead ends: 8667 [2022-12-14 09:59:41,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 208 SyntacticMatches, 11 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2392 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1227, Invalid=6963, Unknown=0, NotChecked=0, Total=8190 [2022-12-14 09:59:41,304 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 565 mSDsluCounter, 1560 mSDsCounter, 0 mSdLazyCounter, 2598 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1625 SdHoareTripleChecker+Invalid, 2598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:59:41,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 1625 Invalid, 2598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2598 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 09:59:41,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8667 states. [2022-12-14 09:59:41,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8667 to 5947. [2022-12-14 09:59:41,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5947 states, 5945 states have (on average 1.2031959629941127) internal successors, (7153), 5946 states have internal predecessors, (7153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:59:41,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5947 states to 5947 states and 7153 transitions. [2022-12-14 09:59:41,354 INFO L78 Accepts]: Start accepts. Automaton has 5947 states and 7153 transitions. Word has length 87 [2022-12-14 09:59:41,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:59:41,354 INFO L495 AbstractCegarLoop]: Abstraction has 5947 states and 7153 transitions. [2022-12-14 09:59:41,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 3.2962962962962963) internal successors, (178), 54 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:59:41,354 INFO L276 IsEmpty]: Start isEmpty. Operand 5947 states and 7153 transitions. [2022-12-14 09:59:41,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-12-14 09:59:41,356 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:59:41,356 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:59:41,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-12-14 09:59:41,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-12-14 09:59:41,558 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:59:41,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:59:41,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1482267906, now seen corresponding path program 26 times [2022-12-14 09:59:41,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:59:41,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077402010] [2022-12-14 09:59:41,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:59:41,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:59:41,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:59:42,698 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 28 proven. 533 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:59:42,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:59:42,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077402010] [2022-12-14 09:59:42,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077402010] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:59:42,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044636807] [2022-12-14 09:59:42,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:59:42,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:59:42,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:59:42,699 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:59:42,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-12-14 09:59:43,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-12-14 09:59:43,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:59:43,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 160 conjunts are in the unsatisfiable core [2022-12-14 09:59:43,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:59:43,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:59:43,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 09:59:43,733 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 28 proven. 533 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:59:43,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:59:43,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-14 09:59:43,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:59:43,950 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 28 proven. 533 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:59:43,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044636807] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:59:43,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1994455963] [2022-12-14 09:59:43,951 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:59:43,951 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:59:43,951 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:59:43,952 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:59:43,952 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:59:43,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:43,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:59:43,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:59:44,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:59:44,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:59:44,073 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 [2022-12-14 09:59:44,110 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:59:44,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:59:44,319 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:59:46,354 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '227656#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 09:59:46,354 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:59:46,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:59:46,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 59 [2022-12-14 09:59:46,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170039420] [2022-12-14 09:59:46,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:59:46,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-12-14 09:59:46,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:59:46,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-12-14 09:59:46,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=4743, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 09:59:46,355 INFO L87 Difference]: Start difference. First operand 5947 states and 7153 transitions. Second operand has 59 states, 59 states have (on average 2.2542372881355934) internal successors, (133), 59 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:59:50,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:59:50,561 INFO L93 Difference]: Finished difference Result 7841 states and 9304 transitions. [2022-12-14 09:59:50,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-12-14 09:59:50,562 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.2542372881355934) internal successors, (133), 59 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-12-14 09:59:50,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:59:50,566 INFO L225 Difference]: With dead ends: 7841 [2022-12-14 09:59:50,566 INFO L226 Difference]: Without dead ends: 6971 [2022-12-14 09:59:50,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 235 SyntacticMatches, 3 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 3950 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1051, Invalid=16771, Unknown=0, NotChecked=0, Total=17822 [2022-12-14 09:59:50,567 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 793 mSDsluCounter, 6126 mSDsCounter, 0 mSdLazyCounter, 6681 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 6311 SdHoareTripleChecker+Invalid, 6701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 6681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:59:50,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [793 Valid, 6311 Invalid, 6701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 6681 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 09:59:50,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6971 states. [2022-12-14 09:59:50,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6971 to 6611. [2022-12-14 09:59:50,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6611 states, 6609 states have (on average 1.2047208352246936) internal successors, (7962), 6610 states have internal predecessors, (7962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:59:50,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6611 states to 6611 states and 7962 transitions. [2022-12-14 09:59:50,616 INFO L78 Accepts]: Start accepts. Automaton has 6611 states and 7962 transitions. Word has length 91 [2022-12-14 09:59:50,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:59:50,616 INFO L495 AbstractCegarLoop]: Abstraction has 6611 states and 7962 transitions. [2022-12-14 09:59:50,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.2542372881355934) internal successors, (133), 59 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:59:50,617 INFO L276 IsEmpty]: Start isEmpty. Operand 6611 states and 7962 transitions. [2022-12-14 09:59:50,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-14 09:59:50,619 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:59:50,619 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:59:50,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-12-14 09:59:50,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:59:50,820 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:59:50,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:59:50,821 INFO L85 PathProgramCache]: Analyzing trace with hash -347022564, now seen corresponding path program 27 times [2022-12-14 09:59:50,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:59:50,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604946585] [2022-12-14 09:59:50,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:59:50,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:59:50,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:59:51,759 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 144 proven. 444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:59:51,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:59:51,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604946585] [2022-12-14 09:59:51,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604946585] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:59:51,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461837205] [2022-12-14 09:59:51,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:59:51,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:59:51,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:59:51,761 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:59:51,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-12-14 09:59:52,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:59:52,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:59:52,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 150 conjunts are in the unsatisfiable core [2022-12-14 09:59:52,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:59:52,037 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 09:59:52,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 09:59:52,481 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 169 proven. 419 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:59:52,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:59:53,631 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 169 proven. 419 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:59:53,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461837205] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:59:53,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1019412369] [2022-12-14 09:59:53,633 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 09:59:53,633 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:59:53,633 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:59:53,633 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:59:53,633 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:59:53,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:53,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:59:53,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:59:53,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:59:53,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:59:53,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:59:53,798 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 09:59:53,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 09:59:54,002 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:59:55,909 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '242885#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 09:59:55,909 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:59:55,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:59:55,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 85 [2022-12-14 09:59:55,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103304734] [2022-12-14 09:59:55,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:59:55,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-12-14 09:59:55,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:59:55,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-12-14 09:59:55,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=8616, Unknown=0, NotChecked=0, Total=9702 [2022-12-14 09:59:55,911 INFO L87 Difference]: Start difference. First operand 6611 states and 7962 transitions. Second operand has 87 states, 86 states have (on average 2.5930232558139537) internal successors, (223), 86 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:59:58,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:59:58,401 INFO L93 Difference]: Finished difference Result 7304 states and 8661 transitions. [2022-12-14 09:59:58,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-12-14 09:59:58,401 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 2.5930232558139537) internal successors, (223), 86 states have internal predecessors, (223), 0 states have call successors, (0), 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 93 [2022-12-14 09:59:58,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:59:58,405 INFO L225 Difference]: With dead ends: 7304 [2022-12-14 09:59:58,405 INFO L226 Difference]: Without dead ends: 7304 [2022-12-14 09:59:58,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5310 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3836, Invalid=17334, Unknown=0, NotChecked=0, Total=21170 [2022-12-14 09:59:58,406 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 984 mSDsluCounter, 2396 mSDsCounter, 0 mSdLazyCounter, 3903 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 984 SdHoareTripleChecker+Valid, 2494 SdHoareTripleChecker+Invalid, 3905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:59:58,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [984 Valid, 2494 Invalid, 3905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3903 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 09:59:58,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7304 states. [2022-12-14 09:59:58,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7304 to 6695. [2022-12-14 09:59:58,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6695 states, 6693 states have (on average 1.205139698192141) internal successors, (8066), 6694 states have internal predecessors, (8066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:59:58,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6695 states to 6695 states and 8066 transitions. [2022-12-14 09:59:58,456 INFO L78 Accepts]: Start accepts. Automaton has 6695 states and 8066 transitions. Word has length 93 [2022-12-14 09:59:58,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:59:58,456 INFO L495 AbstractCegarLoop]: Abstraction has 6695 states and 8066 transitions. [2022-12-14 09:59:58,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 2.5930232558139537) internal successors, (223), 86 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:59:58,457 INFO L276 IsEmpty]: Start isEmpty. Operand 6695 states and 8066 transitions. [2022-12-14 09:59:58,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-14 09:59:58,462 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:59:58,462 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2022-12-14 09:59:58,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-12-14 09:59:58,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:59:58,664 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 09:59:58,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:59:58,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1571453831, now seen corresponding path program 20 times [2022-12-14 09:59:58,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:59:58,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589616604] [2022-12-14 09:59:58,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:59:58,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:59:58,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:59:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 22 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:59:59,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:59:59,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589616604] [2022-12-14 09:59:59,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589616604] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:59:59,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871159605] [2022-12-14 09:59:59,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:59:59,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:59:59,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:59:59,845 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:59:59,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-12-14 10:00:00,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-12-14 10:00:00,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:00:00,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 137 conjunts are in the unsatisfiable core [2022-12-14 10:00:00,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:00:00,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 10:00:00,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:00:00,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 10:00:00,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 10:00:00,834 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 22 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:00:00,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:00:00,981 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:00:00,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 10:00:00,985 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:00:00,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-14 10:00:01,168 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 22 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:00:01,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871159605] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:00:01,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [692905143] [2022-12-14 10:00:01,169 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 10:00:01,169 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:00:01,169 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:00:01,169 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:00:01,169 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:00:01,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:00:01,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:00:01,205 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 [2022-12-14 10:00:01,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:00:01,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:00:01,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:00:01,333 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:00:01,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:00:01,740 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:00:04,027 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '257592#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 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_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:00:04,027 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:00:04,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:00:04,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 49 [2022-12-14 10:00:04,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904201933] [2022-12-14 10:00:04,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:00:04,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-14 10:00:04,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:00:04,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-14 10:00:04,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=3597, Unknown=7, NotChecked=0, Total=3782 [2022-12-14 10:00:04,029 INFO L87 Difference]: Start difference. First operand 6695 states and 8066 transitions. Second operand has 50 states, 50 states have (on average 2.52) internal successors, (126), 49 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:00:07,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:00:07,345 INFO L93 Difference]: Finished difference Result 15290 states and 18298 transitions. [2022-12-14 10:00:07,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-12-14 10:00:07,345 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.52) internal successors, (126), 49 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2022-12-14 10:00:07,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:00:07,350 INFO L225 Difference]: With dead ends: 15290 [2022-12-14 10:00:07,350 INFO L226 Difference]: Without dead ends: 10334 [2022-12-14 10:00:07,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 244 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2182 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=679, Invalid=11086, Unknown=7, NotChecked=0, Total=11772 [2022-12-14 10:00:07,351 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 673 mSDsluCounter, 4746 mSDsCounter, 0 mSdLazyCounter, 5727 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 4890 SdHoareTripleChecker+Invalid, 5740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 5727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 10:00:07,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 4890 Invalid, 5740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 5727 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 10:00:07,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10334 states. [2022-12-14 10:00:07,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10334 to 6792. [2022-12-14 10:00:07,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6792 states, 6790 states have (on average 1.204860088365243) internal successors, (8181), 6791 states have internal predecessors, (8181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:00:07,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6792 states to 6792 states and 8181 transitions. [2022-12-14 10:00:07,417 INFO L78 Accepts]: Start accepts. Automaton has 6792 states and 8181 transitions. Word has length 93 [2022-12-14 10:00:07,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:00:07,417 INFO L495 AbstractCegarLoop]: Abstraction has 6792 states and 8181 transitions. [2022-12-14 10:00:07,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.52) internal successors, (126), 49 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:00:07,418 INFO L276 IsEmpty]: Start isEmpty. Operand 6792 states and 8181 transitions. [2022-12-14 10:00:07,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-12-14 10:00:07,422 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:00:07,422 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2022-12-14 10:00:07,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-12-14 10:00:07,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:00:07,623 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 10:00:07,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:00:07,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1349299752, now seen corresponding path program 21 times [2022-12-14 10:00:07,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:00:07,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922753538] [2022-12-14 10:00:07,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:07,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:00:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:08,416 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 100 proven. 373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:00:08,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:00:08,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922753538] [2022-12-14 10:00:08,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922753538] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:00:08,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244356537] [2022-12-14 10:00:08,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:00:08,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:00:08,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:00:08,418 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:00:08,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-12-14 10:00:08,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:00:08,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:00:08,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 122 conjunts are in the unsatisfiable core [2022-12-14 10:00:08,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:00:09,257 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 100 proven. 373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:00:09,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:00:09,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-12-14 10:00:10,057 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 100 proven. 373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:00:10,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244356537] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:00:10,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [436351856] [2022-12-14 10:00:10,058 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 10:00:10,058 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:00:10,058 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:00:10,058 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:00:10,058 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:00:10,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:00:10,082 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 [2022-12-14 10:00:10,105 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 [2022-12-14 10:00:10,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:00:10,155 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 [2022-12-14 10:00:10,188 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 [2022-12-14 10:00:10,227 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:00:10,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:00:10,578 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:00:12,702 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '280413#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 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_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:00:12,702 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:00:12,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:00:12,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 67 [2022-12-14 10:00:12,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264003146] [2022-12-14 10:00:12,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:00:12,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-12-14 10:00:12,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:00:12,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-12-14 10:00:12,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=667, Invalid=5813, Unknown=0, NotChecked=0, Total=6480 [2022-12-14 10:00:12,703 INFO L87 Difference]: Start difference. First operand 6792 states and 8181 transitions. Second operand has 69 states, 68 states have (on average 3.2205882352941178) internal successors, (219), 68 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) [2022-12-14 10:00:14,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:00:14,259 INFO L93 Difference]: Finished difference Result 10846 states and 13050 transitions. [2022-12-14 10:00:14,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-14 10:00:14,259 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 3.2205882352941178) internal successors, (219), 68 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 95 [2022-12-14 10:00:14,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:00:14,265 INFO L225 Difference]: With dead ends: 10846 [2022-12-14 10:00:14,265 INFO L226 Difference]: Without dead ends: 10846 [2022-12-14 10:00:14,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2593 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1972, Invalid=9370, Unknown=0, NotChecked=0, Total=11342 [2022-12-14 10:00:14,266 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 651 mSDsluCounter, 1810 mSDsCounter, 0 mSdLazyCounter, 3069 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 1877 SdHoareTripleChecker+Invalid, 3069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 10:00:14,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 1877 Invalid, 3069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3069 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 10:00:14,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10846 states. [2022-12-14 10:00:14,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10846 to 7304. [2022-12-14 10:00:14,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7304 states, 7302 states have (on average 1.2051492741714598) internal successors, (8800), 7303 states have internal predecessors, (8800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:00:14,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 8800 transitions. [2022-12-14 10:00:14,327 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 8800 transitions. Word has length 95 [2022-12-14 10:00:14,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:00:14,327 INFO L495 AbstractCegarLoop]: Abstraction has 7304 states and 8800 transitions. [2022-12-14 10:00:14,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 3.2205882352941178) internal successors, (219), 68 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) [2022-12-14 10:00:14,327 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 8800 transitions. [2022-12-14 10:00:14,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-12-14 10:00:14,329 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:00:14,329 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:00:14,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-12-14 10:00:14,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:00:14,531 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 10:00:14,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:00:14,532 INFO L85 PathProgramCache]: Analyzing trace with hash -727246559, now seen corresponding path program 28 times [2022-12-14 10:00:14,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:00:14,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035704975] [2022-12-14 10:00:14,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:14,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:00:14,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:15,577 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 30 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:00:15,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:00:15,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035704975] [2022-12-14 10:00:15,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035704975] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:00:15,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361622107] [2022-12-14 10:00:15,577 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:00:15,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:00:15,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:00:15,578 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:00:15,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-12-14 10:00:15,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:15,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 170 conjunts are in the unsatisfiable core [2022-12-14 10:00:15,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:00:16,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:00:16,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 10:00:16,348 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 30 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:00:16,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:00:16,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-14 10:00:16,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:00:16,605 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 30 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:00:16,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361622107] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:00:16,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [703133104] [2022-12-14 10:00:16,606 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 10:00:16,606 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:00:16,606 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:00:16,607 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:00:16,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:00:16,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:00:16,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:00:16,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:00:16,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:00:16,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:00:16,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:00:16,763 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:00:16,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:00:16,962 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:00:19,145 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '299265#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 10:00:19,146 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:00:19,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:00:19,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 62 [2022-12-14 10:00:19,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4742194] [2022-12-14 10:00:19,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:00:19,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-12-14 10:00:19,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:00:19,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-12-14 10:00:19,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=5167, Unknown=0, NotChecked=0, Total=5402 [2022-12-14 10:00:19,147 INFO L87 Difference]: Start difference. First operand 7304 states and 8800 transitions. Second operand has 62 states, 62 states have (on average 2.274193548387097) internal successors, (141), 62 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:00:23,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:00:23,831 INFO L93 Difference]: Finished difference Result 9517 states and 11318 transitions. [2022-12-14 10:00:23,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-12-14 10:00:23,832 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.274193548387097) internal successors, (141), 62 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2022-12-14 10:00:23,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:00:23,836 INFO L225 Difference]: With dead ends: 9517 [2022-12-14 10:00:23,836 INFO L226 Difference]: Without dead ends: 8493 [2022-12-14 10:00:23,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 252 SyntacticMatches, 3 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 4364 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1109, Invalid=18631, Unknown=0, NotChecked=0, Total=19740 [2022-12-14 10:00:23,837 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 805 mSDsluCounter, 7663 mSDsCounter, 0 mSdLazyCounter, 8314 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 7862 SdHoareTripleChecker+Invalid, 8335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 8314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:00:23,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [805 Valid, 7862 Invalid, 8335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 8314 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 10:00:23,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8493 states. [2022-12-14 10:00:23,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8493 to 8076. [2022-12-14 10:00:23,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8076 states, 8074 states have (on average 1.2065890512756998) internal successors, (9742), 8075 states have internal predecessors, (9742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:00:23,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8076 states to 8076 states and 9742 transitions. [2022-12-14 10:00:23,894 INFO L78 Accepts]: Start accepts. Automaton has 8076 states and 9742 transitions. Word has length 97 [2022-12-14 10:00:23,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:00:23,894 INFO L495 AbstractCegarLoop]: Abstraction has 8076 states and 9742 transitions. [2022-12-14 10:00:23,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.274193548387097) internal successors, (141), 62 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:00:23,894 INFO L276 IsEmpty]: Start isEmpty. Operand 8076 states and 9742 transitions. [2022-12-14 10:00:23,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-12-14 10:00:23,897 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:00:23,897 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:00:23,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-12-14 10:00:24,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-12-14 10:00:24,098 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 10:00:24,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:00:24,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1335001791, now seen corresponding path program 29 times [2022-12-14 10:00:24,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:00:24,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235887862] [2022-12-14 10:00:24,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:24,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:00:24,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:25,177 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 169 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:00:25,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:00:25,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235887862] [2022-12-14 10:00:25,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235887862] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:00:25,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335017745] [2022-12-14 10:00:25,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:00:25,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:00:25,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:00:25,178 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:00:25,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-12-14 10:00:25,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-12-14 10:00:25,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:00:25,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 125 conjunts are in the unsatisfiable core [2022-12-14 10:00:25,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:00:26,362 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 196 proven. 479 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:00:26,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:00:27,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 10:00:27,420 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 196 proven. 479 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:00:27,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335017745] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:00:27,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [721779442] [2022-12-14 10:00:27,421 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 10:00:27,421 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:00:27,421 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:00:27,421 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:00:27,421 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:00:27,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:00:27,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:00:27,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:00:27,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:00:27,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:00:27,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:00:27,586 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:00:27,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:00:27,793 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:00:29,842 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '317684#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 10:00:29,842 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:00:29,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:00:29,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 91 [2022-12-14 10:00:29,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181726108] [2022-12-14 10:00:29,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:00:29,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-12-14 10:00:29,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:00:29,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-12-14 10:00:29,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1242, Invalid=9470, Unknown=0, NotChecked=0, Total=10712 [2022-12-14 10:00:29,844 INFO L87 Difference]: Start difference. First operand 8076 states and 9742 transitions. Second operand has 92 states, 91 states have (on average 2.89010989010989) internal successors, (263), 92 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:00:32,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:00:32,847 INFO L93 Difference]: Finished difference Result 8881 states and 10554 transitions. [2022-12-14 10:00:32,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-12-14 10:00:32,847 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 2.89010989010989) internal successors, (263), 92 states have internal predecessors, (263), 0 states have call successors, (0), 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 99 [2022-12-14 10:00:32,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:00:32,851 INFO L225 Difference]: With dead ends: 8881 [2022-12-14 10:00:32,851 INFO L226 Difference]: Without dead ends: 8881 [2022-12-14 10:00:32,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 213 SyntacticMatches, 16 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7410 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=3869, Invalid=19693, Unknown=0, NotChecked=0, Total=23562 [2022-12-14 10:00:32,852 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 800 mSDsluCounter, 2266 mSDsCounter, 0 mSdLazyCounter, 3451 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 2369 SdHoareTripleChecker+Invalid, 3453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:00:32,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [800 Valid, 2369 Invalid, 3453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3451 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 10:00:32,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8881 states. [2022-12-14 10:00:32,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8881 to 8168. [2022-12-14 10:00:32,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8168 states, 8166 states have (on average 1.2069556698506) internal successors, (9856), 8167 states have internal predecessors, (9856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:00:32,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8168 states to 8168 states and 9856 transitions. [2022-12-14 10:00:32,915 INFO L78 Accepts]: Start accepts. Automaton has 8168 states and 9856 transitions. Word has length 99 [2022-12-14 10:00:32,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:00:32,915 INFO L495 AbstractCegarLoop]: Abstraction has 8168 states and 9856 transitions. [2022-12-14 10:00:32,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 2.89010989010989) internal successors, (263), 92 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:00:32,916 INFO L276 IsEmpty]: Start isEmpty. Operand 8168 states and 9856 transitions. [2022-12-14 10:00:32,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 10:00:32,919 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:00:32,919 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2022-12-14 10:00:32,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-12-14 10:00:33,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:00:33,120 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 10:00:33,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:00:33,121 INFO L85 PathProgramCache]: Analyzing trace with hash 929293235, now seen corresponding path program 22 times [2022-12-14 10:00:33,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:00:33,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988351861] [2022-12-14 10:00:33,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:33,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:00:33,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:34,367 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 24 proven. 517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:00:34,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:00:34,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988351861] [2022-12-14 10:00:34,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988351861] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:00:34,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921598046] [2022-12-14 10:00:34,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:00:34,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:00:34,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:00:34,368 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:00:34,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-12-14 10:00:34,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:34,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 180 conjunts are in the unsatisfiable core [2022-12-14 10:00:34,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:00:35,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:00:35,258 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 10:00:35,258 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 16 treesize of output 22 [2022-12-14 10:00:35,264 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 3 [2022-12-14 10:00:37,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:00:37,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:00:37,908 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-12-14 10:00:37,909 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 6 case distinctions, treesize of input 32 treesize of output 21 [2022-12-14 10:00:37,913 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 24 proven. 517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:00:37,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:00:38,887 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:00:38,888 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 34 [2022-12-14 10:00:38,896 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:00:38,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 57 [2022-12-14 10:00:38,907 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:00:38,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 10:00:40,620 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 31 proven. 510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:00:40,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921598046] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:00:40,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [358261714] [2022-12-14 10:00:40,621 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 10:00:40,621 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:00:40,621 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:00:40,621 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:00:40,621 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:00:40,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:00:40,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:00:40,657 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 11 treesize of output 7 [2022-12-14 10:00:40,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:00:40,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:00:40,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:00:40,770 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:00:40,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:00:41,051 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:00:43,775 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '335542#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 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_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:00:43,775 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:00:43,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:00:43,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 39, 39] total 96 [2022-12-14 10:00:43,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033210921] [2022-12-14 10:00:43,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:00:43,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-12-14 10:00:43,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:00:43,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-12-14 10:00:43,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=11455, Unknown=0, NotChecked=0, Total=11772 [2022-12-14 10:00:43,776 INFO L87 Difference]: Start difference. First operand 8168 states and 9856 transitions. Second operand has 97 states, 97 states have (on average 2.6082474226804124) internal successors, (253), 96 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:01:00,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:01:00,447 INFO L93 Difference]: Finished difference Result 22401 states and 26912 transitions. [2022-12-14 10:01:00,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-12-14 10:01:00,448 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.6082474226804124) internal successors, (253), 96 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-12-14 10:01:00,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:01:00,455 INFO L225 Difference]: With dead ends: 22401 [2022-12-14 10:01:00,456 INFO L226 Difference]: Without dead ends: 13199 [2022-12-14 10:01:00,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9718 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=2270, Invalid=47682, Unknown=0, NotChecked=0, Total=49952 [2022-12-14 10:01:00,458 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 2254 mSDsluCounter, 8916 mSDsCounter, 0 mSdLazyCounter, 12839 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2254 SdHoareTripleChecker+Valid, 9062 SdHoareTripleChecker+Invalid, 12866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 12839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:01:00,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2254 Valid, 9062 Invalid, 12866 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [27 Valid, 12839 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-12-14 10:01:00,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13199 states. [2022-12-14 10:01:00,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13199 to 8271. [2022-12-14 10:01:00,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8271 states, 8269 states have (on average 1.206675535131213) internal successors, (9978), 8270 states have internal predecessors, (9978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:01:00,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8271 states to 8271 states and 9978 transitions. [2022-12-14 10:01:00,547 INFO L78 Accepts]: Start accepts. Automaton has 8271 states and 9978 transitions. Word has length 101 [2022-12-14 10:01:00,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:01:00,547 INFO L495 AbstractCegarLoop]: Abstraction has 8271 states and 9978 transitions. [2022-12-14 10:01:00,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.6082474226804124) internal successors, (253), 96 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:01:00,547 INFO L276 IsEmpty]: Start isEmpty. Operand 8271 states and 9978 transitions. [2022-12-14 10:01:00,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-12-14 10:01:00,549 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:01:00,549 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:01:00,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-12-14 10:01:00,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:01:00,750 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 10:01:00,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:01:00,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1790326596, now seen corresponding path program 30 times [2022-12-14 10:01:00,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:01:00,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676987062] [2022-12-14 10:01:00,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:01:00,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:01:00,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:01:02,122 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 32 proven. 705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:01:02,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:01:02,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676987062] [2022-12-14 10:01:02,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676987062] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:01:02,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801650079] [2022-12-14 10:01:02,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:01:02,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:01:02,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:01:02,123 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:01:02,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-12-14 10:01:02,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:01:02,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:01:02,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 178 conjunts are in the unsatisfiable core [2022-12-14 10:01:02,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:01:02,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:01:03,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 10:01:03,035 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 32 proven. 705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:01:03,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:01:03,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-14 10:01:03,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:01:03,323 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 32 proven. 705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:01:03,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801650079] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:01:03,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [572860567] [2022-12-14 10:01:03,324 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 10:01:03,324 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:01:03,324 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:01:03,324 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:01:03,324 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:01:03,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:01:03,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:01:03,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:01:03,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:01:03,423 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 14 treesize of output 10 [2022-12-14 10:01:03,463 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 [2022-12-14 10:01:03,500 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:01:03,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:01:03,727 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:01:05,895 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '367133#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 10:01:05,896 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:01:05,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:01:05,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 65 [2022-12-14 10:01:05,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624749906] [2022-12-14 10:01:05,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:01:05,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-12-14 10:01:05,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:01:05,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-12-14 10:01:05,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=5609, Unknown=0, NotChecked=0, Total=5852 [2022-12-14 10:01:05,897 INFO L87 Difference]: Start difference. First operand 8271 states and 9978 transitions. Second operand has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:01:10,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:01:10,594 INFO L93 Difference]: Finished difference Result 10731 states and 12780 transitions. [2022-12-14 10:01:10,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-12-14 10:01:10,594 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 0 states have call successors, (0), 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 103 [2022-12-14 10:01:10,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:01:10,599 INFO L225 Difference]: With dead ends: 10731 [2022-12-14 10:01:10,599 INFO L226 Difference]: Without dead ends: 9541 [2022-12-14 10:01:10,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 269 SyntacticMatches, 3 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 4799 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1167, Invalid=20589, Unknown=0, NotChecked=0, Total=21756 [2022-12-14 10:01:10,601 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 878 mSDsluCounter, 8629 mSDsCounter, 0 mSdLazyCounter, 9112 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 8842 SdHoareTripleChecker+Invalid, 9134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 9112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:01:10,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [878 Valid, 8842 Invalid, 9134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 9112 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 10:01:10,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9541 states. [2022-12-14 10:01:10,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9541 to 9093. [2022-12-14 10:01:10,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9093 states, 9091 states have (on average 1.2080079199208007) internal successors, (10982), 9092 states have internal predecessors, (10982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:01:10,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9093 states to 9093 states and 10982 transitions. [2022-12-14 10:01:10,664 INFO L78 Accepts]: Start accepts. Automaton has 9093 states and 10982 transitions. Word has length 103 [2022-12-14 10:01:10,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:01:10,664 INFO L495 AbstractCegarLoop]: Abstraction has 9093 states and 10982 transitions. [2022-12-14 10:01:10,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:01:10,665 INFO L276 IsEmpty]: Start isEmpty. Operand 9093 states and 10982 transitions. [2022-12-14 10:01:10,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-12-14 10:01:10,667 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:01:10,667 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2022-12-14 10:01:10,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-12-14 10:01:10,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:01:10,869 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 10:01:10,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:01:10,870 INFO L85 PathProgramCache]: Analyzing trace with hash 789180002, now seen corresponding path program 23 times [2022-12-14 10:01:10,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:01:10,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727705197] [2022-12-14 10:01:10,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:01:10,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:01:10,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:01:11,753 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 121 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:01:11,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:01:11,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727705197] [2022-12-14 10:01:11,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727705197] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:01:11,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905397863] [2022-12-14 10:01:11,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:01:11,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:01:11,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:01:11,755 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:01:11,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-12-14 10:01:12,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-12-14 10:01:12,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:01:12,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 104 conjunts are in the unsatisfiable core [2022-12-14 10:01:12,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:01:12,472 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 121 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:01:12,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:01:12,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 10:01:13,050 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 121 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:01:13,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905397863] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:01:13,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [894478047] [2022-12-14 10:01:13,051 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 10:01:13,051 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:01:13,051 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:01:13,052 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:01:13,052 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:01:13,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:01:13,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:01:13,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:01:13,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:01:13,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:01:13,184 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 [2022-12-14 10:01:13,217 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:01:13,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:01:13,523 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:01:15,503 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '387784#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 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_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:01:15,503 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:01:15,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:01:15,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 59 [2022-12-14 10:01:15,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147348771] [2022-12-14 10:01:15,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:01:15,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-12-14 10:01:15,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:01:15,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-12-14 10:01:15,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=652, Invalid=4604, Unknown=0, NotChecked=0, Total=5256 [2022-12-14 10:01:15,504 INFO L87 Difference]: Start difference. First operand 9093 states and 10982 transitions. Second operand has 61 states, 60 states have (on average 4.216666666666667) internal successors, (253), 60 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:01:16,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:01:16,886 INFO L93 Difference]: Finished difference Result 14249 states and 17197 transitions. [2022-12-14 10:01:16,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-14 10:01:16,886 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 4.216666666666667) internal successors, (253), 60 states have internal predecessors, (253), 0 states have call successors, (0), 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 103 [2022-12-14 10:01:16,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:01:16,895 INFO L225 Difference]: With dead ends: 14249 [2022-12-14 10:01:16,895 INFO L226 Difference]: Without dead ends: 14249 [2022-12-14 10:01:16,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 252 SyntacticMatches, 13 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2296 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1609, Invalid=8491, Unknown=0, NotChecked=0, Total=10100 [2022-12-14 10:01:16,896 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 566 mSDsluCounter, 1613 mSDsCounter, 0 mSdLazyCounter, 2560 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 1686 SdHoareTripleChecker+Invalid, 2560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 10:01:16,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 1686 Invalid, 2560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2560 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 10:01:16,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14249 states. [2022-12-14 10:01:16,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14249 to 9737. [2022-12-14 10:01:16,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9737 states, 9735 states have (on average 1.2083204930662559) internal successors, (11763), 9736 states have internal predecessors, (11763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:01:16,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9737 states to 9737 states and 11763 transitions. [2022-12-14 10:01:16,981 INFO L78 Accepts]: Start accepts. Automaton has 9737 states and 11763 transitions. Word has length 103 [2022-12-14 10:01:16,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:01:16,981 INFO L495 AbstractCegarLoop]: Abstraction has 9737 states and 11763 transitions. [2022-12-14 10:01:16,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 4.216666666666667) internal successors, (253), 60 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:01:16,981 INFO L276 IsEmpty]: Start isEmpty. Operand 9737 states and 11763 transitions. [2022-12-14 10:01:16,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-12-14 10:01:16,984 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:01:16,984 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:01:16,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-12-14 10:01:17,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:01:17,185 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 10:01:17,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:01:17,186 INFO L85 PathProgramCache]: Analyzing trace with hash -574131614, now seen corresponding path program 31 times [2022-12-14 10:01:17,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:01:17,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655336192] [2022-12-14 10:01:17,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:01:17,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:01:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:01:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 196 proven. 572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:01:18,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:01:18,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655336192] [2022-12-14 10:01:18,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655336192] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:01:18,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264251853] [2022-12-14 10:01:18,351 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:01:18,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:01:18,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:01:18,352 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:01:18,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-12-14 10:01:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:01:18,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 162 conjunts are in the unsatisfiable core [2022-12-14 10:01:18,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:01:19,031 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 225 proven. 543 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:01:19,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:01:19,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 10:01:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 225 proven. 543 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:01:20,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264251853] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:01:20,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [566767938] [2022-12-14 10:01:20,070 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 10:01:20,070 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:01:20,070 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:01:20,070 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:01:20,070 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:01:20,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:01:20,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:01:20,113 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 [2022-12-14 10:01:20,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:01:20,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:01:20,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:01:20,227 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:01:20,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:01:20,437 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:01:22,411 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '412542#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 10:01:22,411 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:01:22,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:01:22,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 79 [2022-12-14 10:01:22,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235142102] [2022-12-14 10:01:22,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:01:22,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-12-14 10:01:22,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:01:22,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-12-14 10:01:22,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=7586, Unknown=0, NotChecked=0, Total=8372 [2022-12-14 10:01:22,412 INFO L87 Difference]: Start difference. First operand 9737 states and 11763 transitions. Second operand has 80 states, 79 states have (on average 2.721518987341772) internal successors, (215), 80 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:01:25,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:01:25,561 INFO L93 Difference]: Finished difference Result 10662 states and 12696 transitions. [2022-12-14 10:01:25,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-12-14 10:01:25,562 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 2.721518987341772) internal successors, (215), 80 states have internal predecessors, (215), 0 states have call successors, (0), 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 105 [2022-12-14 10:01:25,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:01:25,567 INFO L225 Difference]: With dead ends: 10662 [2022-12-14 10:01:25,567 INFO L226 Difference]: Without dead ends: 10662 [2022-12-14 10:01:25,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 244 SyntacticMatches, 17 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5881 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3373, Invalid=17507, Unknown=0, NotChecked=0, Total=20880 [2022-12-14 10:01:25,569 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 999 mSDsluCounter, 3102 mSDsCounter, 0 mSdLazyCounter, 4778 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 999 SdHoareTripleChecker+Valid, 3210 SdHoareTripleChecker+Invalid, 4780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:01:25,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [999 Valid, 3210 Invalid, 4780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4778 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 10:01:25,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10662 states. [2022-12-14 10:01:25,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10662 to 9837. [2022-12-14 10:01:25,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9837 states, 9835 states have (on average 1.2086426029486528) internal successors, (11887), 9836 states have internal predecessors, (11887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:01:25,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9837 states to 9837 states and 11887 transitions. [2022-12-14 10:01:25,642 INFO L78 Accepts]: Start accepts. Automaton has 9837 states and 11887 transitions. Word has length 105 [2022-12-14 10:01:25,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:01:25,642 INFO L495 AbstractCegarLoop]: Abstraction has 9837 states and 11887 transitions. [2022-12-14 10:01:25,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 2.721518987341772) internal successors, (215), 80 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:01:25,643 INFO L276 IsEmpty]: Start isEmpty. Operand 9837 states and 11887 transitions. [2022-12-14 10:01:25,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-14 10:01:25,645 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:01:25,646 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:01:25,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-12-14 10:01:25,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-12-14 10:01:25,847 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 10:01:25,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:01:25,848 INFO L85 PathProgramCache]: Analyzing trace with hash -271278745, now seen corresponding path program 32 times [2022-12-14 10:01:25,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:01:25,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233561446] [2022-12-14 10:01:25,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:01:25,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:01:25,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:01:27,219 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 34 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:01:27,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:01:27,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233561446] [2022-12-14 10:01:27,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233561446] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:01:27,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404187068] [2022-12-14 10:01:27,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:01:27,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:01:27,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:01:27,221 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:01:27,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-12-14 10:01:28,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-12-14 10:01:28,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:01:28,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 198 conjunts are in the unsatisfiable core [2022-12-14 10:01:28,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:01:28,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:01:28,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 10:01:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 34 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:01:28,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:01:29,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-14 10:01:29,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:01:29,643 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 34 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:01:29,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404187068] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:01:29,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [502146262] [2022-12-14 10:01:29,644 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 10:01:29,644 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:01:29,644 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:01:29,644 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:01:29,644 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:01:29,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:01:29,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:01:29,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:01:29,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:01:29,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:01:29,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:01:29,818 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:01:29,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:01:30,027 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:01:33,184 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '433889#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 10:01:33,184 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:01:33,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:01:33,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 82 [2022-12-14 10:01:33,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833870370] [2022-12-14 10:01:33,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:01:33,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-12-14 10:01:33,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:01:33,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-12-14 10:01:33,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=8452, Unknown=0, NotChecked=0, Total=8742 [2022-12-14 10:01:33,185 INFO L87 Difference]: Start difference. First operand 9837 states and 11887 transitions. Second operand has 82 states, 82 states have (on average 2.658536585365854) internal successors, (218), 82 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:01:40,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:01:40,245 INFO L93 Difference]: Finished difference Result 12543 states and 14973 transitions. [2022-12-14 10:01:40,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-12-14 10:01:40,246 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.658536585365854) internal successors, (218), 82 states have internal predecessors, (218), 0 states have call successors, (0), 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 109 [2022-12-14 10:01:40,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:01:40,251 INFO L225 Difference]: With dead ends: 12543 [2022-12-14 10:01:40,251 INFO L226 Difference]: Without dead ends: 11283 [2022-12-14 10:01:40,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 273 SyntacticMatches, 2 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7060 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=1206, Invalid=26850, Unknown=0, NotChecked=0, Total=28056 [2022-12-14 10:01:40,252 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 763 mSDsluCounter, 11777 mSDsCounter, 0 mSdLazyCounter, 13442 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 12004 SdHoareTripleChecker+Invalid, 13466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 13442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:01:40,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [763 Valid, 12004 Invalid, 13466 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [24 Valid, 13442 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-12-14 10:01:40,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11283 states. [2022-12-14 10:01:40,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11283 to 10777. [2022-12-14 10:01:40,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10777 states, 10775 states have (on average 1.2099303944315545) internal successors, (13037), 10776 states have internal predecessors, (13037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:01:40,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10777 states to 10777 states and 13037 transitions. [2022-12-14 10:01:40,326 INFO L78 Accepts]: Start accepts. Automaton has 10777 states and 13037 transitions. Word has length 109 [2022-12-14 10:01:40,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:01:40,326 INFO L495 AbstractCegarLoop]: Abstraction has 10777 states and 13037 transitions. [2022-12-14 10:01:40,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.658536585365854) internal successors, (218), 82 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:01:40,326 INFO L276 IsEmpty]: Start isEmpty. Operand 10777 states and 13037 transitions. [2022-12-14 10:01:40,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-14 10:01:40,329 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:01:40,329 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2022-12-14 10:01:40,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-12-14 10:01:40,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-12-14 10:01:40,530 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 10:01:40,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:01:40,531 INFO L85 PathProgramCache]: Analyzing trace with hash 2000326765, now seen corresponding path program 24 times [2022-12-14 10:01:40,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:01:40,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577720518] [2022-12-14 10:01:40,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:01:40,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:01:40,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:01:41,922 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 26 proven. 612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:01:41,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:01:41,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577720518] [2022-12-14 10:01:41,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577720518] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:01:41,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940064558] [2022-12-14 10:01:41,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:01:41,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:01:41,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:01:41,923 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:01:41,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-12-14 10:01:42,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:01:42,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:01:42,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 188 conjunts are in the unsatisfiable core [2022-12-14 10:01:42,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:01:42,888 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 [2022-12-14 10:01:42,981 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 10:01:42,981 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 16 treesize of output 22 [2022-12-14 10:01:42,985 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 3 [2022-12-14 10:01:45,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:01:45,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:01:45,715 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-12-14 10:01:45,715 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 6 case distinctions, treesize of input 32 treesize of output 21 [2022-12-14 10:01:45,721 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 26 proven. 612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:01:45,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:01:46,921 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int) (v_ArrVal_2944 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2944) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ 12 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (not (= (select v_ArrVal_2944 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0)) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)))) is different from false [2022-12-14 10:01:46,927 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:01:46,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 34 [2022-12-14 10:01:46,935 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:01:46,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 57 [2022-12-14 10:01:46,945 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:01:46,945 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 27 treesize of output 37 [2022-12-14 10:01:48,655 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 33 proven. 605 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:01:48,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940064558] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:01:48,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2052465158] [2022-12-14 10:01:48,656 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 10:01:48,656 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:01:48,656 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:01:48,656 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:01:48,656 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:01:48,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:01:48,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:01:48,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:01:48,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:01:48,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:01:48,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:01:48,793 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:01:48,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:01:49,129 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:01:52,752 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '458120#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 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_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:01:52,752 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:01:52,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:01:52,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 40, 40] total 102 [2022-12-14 10:01:52,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149118819] [2022-12-14 10:01:52,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:01:52,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-12-14 10:01:52,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:01:52,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-12-14 10:01:52,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=12558, Unknown=1, NotChecked=224, Total=13110 [2022-12-14 10:01:52,755 INFO L87 Difference]: Start difference. First operand 10777 states and 13037 transitions. Second operand has 103 states, 103 states have (on average 2.8058252427184467) internal successors, (289), 102 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:01:58,235 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 12 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))) (and (= 0 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) (or (= 13 |c_ULTIMATE.start_main_~length1~0#1|) (= |c_ULTIMATE.start_main_~length1~0#1| 1)) (= |c_ULTIMATE.start_main_~i~0#1| 0) (not (= |c_ULTIMATE.start_main_~nondetString1~0#1.base| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)) (or (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) (= .cse0 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) (<= 0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int) (v_ArrVal_2944 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2944) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse1 .cse0) 0) (not (= (select v_ArrVal_2944 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0)) (= (select .cse1 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)))) (<= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0))) is different from false [2022-12-14 10:02:07,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:02:07,190 INFO L93 Difference]: Finished difference Result 27848 states and 33547 transitions. [2022-12-14 10:02:07,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-12-14 10:02:07,191 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.8058252427184467) internal successors, (289), 102 states have internal predecessors, (289), 0 states have call successors, (0), 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 109 [2022-12-14 10:02:07,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:02:07,200 INFO L225 Difference]: With dead ends: 27848 [2022-12-14 10:02:07,200 INFO L226 Difference]: Without dead ends: 16824 [2022-12-14 10:02:07,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 6262 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=1538, Invalid=38268, Unknown=2, NotChecked=794, Total=40602 [2022-12-14 10:02:07,202 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 1505 mSDsluCounter, 10426 mSDsCounter, 0 mSdLazyCounter, 14142 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1505 SdHoareTripleChecker+Valid, 10586 SdHoareTripleChecker+Invalid, 14516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 14142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 354 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-12-14 10:02:07,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1505 Valid, 10586 Invalid, 14516 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [20 Valid, 14142 Invalid, 0 Unknown, 354 Unchecked, 5.7s Time] [2022-12-14 10:02:07,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16824 states. [2022-12-14 10:02:07,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16824 to 10888. [2022-12-14 10:02:07,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10888 states, 10886 states have (on average 1.2096270439096086) internal successors, (13168), 10887 states have internal predecessors, (13168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:02:07,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10888 states to 10888 states and 13168 transitions. [2022-12-14 10:02:07,303 INFO L78 Accepts]: Start accepts. Automaton has 10888 states and 13168 transitions. Word has length 109 [2022-12-14 10:02:07,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:02:07,304 INFO L495 AbstractCegarLoop]: Abstraction has 10888 states and 13168 transitions. [2022-12-14 10:02:07,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.8058252427184467) internal successors, (289), 102 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:02:07,304 INFO L276 IsEmpty]: Start isEmpty. Operand 10888 states and 13168 transitions. [2022-12-14 10:02:07,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 10:02:07,307 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:02:07,308 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:02:07,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-12-14 10:02:07,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:02:07,509 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 10:02:07,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:02:07,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1422428677, now seen corresponding path program 33 times [2022-12-14 10:02:07,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:02:07,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627864518] [2022-12-14 10:02:07,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:02:07,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:02:07,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:02:09,320 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 225 proven. 642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:02:09,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:02:09,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627864518] [2022-12-14 10:02:09,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627864518] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:02:09,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358295702] [2022-12-14 10:02:09,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:02:09,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:02:09,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:02:09,321 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:02:09,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-12-14 10:02:09,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:02:09,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:02:09,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 177 conjunts are in the unsatisfiable core [2022-12-14 10:02:09,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:02:09,816 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 10:02:09,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 10:02:10,442 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 256 proven. 611 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:02:10,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:02:12,371 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 256 proven. 611 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:02:12,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358295702] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:02:12,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2049653599] [2022-12-14 10:02:12,372 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 10:02:12,372 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:02:12,372 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:02:12,372 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:02:12,373 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:02:12,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:02:12,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:02:12,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:02:12,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:02:12,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:02:12,481 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 [2022-12-14 10:02:12,528 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:02:12,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:02:12,700 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:02:15,141 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '497804#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 10:02:15,141 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:02:15,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:02:15,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 100 [2022-12-14 10:02:15,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11812911] [2022-12-14 10:02:15,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:02:15,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-12-14 10:02:15,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:02:15,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-12-14 10:02:15,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1453, Invalid=11429, Unknown=0, NotChecked=0, Total=12882 [2022-12-14 10:02:15,143 INFO L87 Difference]: Start difference. First operand 10888 states and 13168 transitions. Second operand has 102 states, 101 states have (on average 2.623762376237624) internal successors, (265), 101 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:02:19,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:02:19,960 INFO L93 Difference]: Finished difference Result 11902 states and 14190 transitions. [2022-12-14 10:02:19,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-12-14 10:02:19,961 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 101 states have (on average 2.623762376237624) internal successors, (265), 101 states have internal predecessors, (265), 0 states have call successors, (0), 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 111 [2022-12-14 10:02:19,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:02:19,966 INFO L225 Difference]: With dead ends: 11902 [2022-12-14 10:02:19,966 INFO L226 Difference]: Without dead ends: 11902 [2022-12-14 10:02:19,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7206 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=5289, Invalid=23441, Unknown=0, NotChecked=0, Total=28730 [2022-12-14 10:02:19,967 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 1468 mSDsluCounter, 2886 mSDsCounter, 0 mSdLazyCounter, 4925 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1468 SdHoareTripleChecker+Valid, 2977 SdHoareTripleChecker+Invalid, 4927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 10:02:19,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1468 Valid, 2977 Invalid, 4927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4925 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 10:02:19,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11902 states. [2022-12-14 10:02:20,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11902 to 10992. [2022-12-14 10:02:20,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10992 states, 10990 states have (on average 1.2099181073703367) internal successors, (13297), 10991 states have internal predecessors, (13297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:02:20,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10992 states to 10992 states and 13297 transitions. [2022-12-14 10:02:20,050 INFO L78 Accepts]: Start accepts. Automaton has 10992 states and 13297 transitions. Word has length 111 [2022-12-14 10:02:20,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:02:20,050 INFO L495 AbstractCegarLoop]: Abstraction has 10992 states and 13297 transitions. [2022-12-14 10:02:20,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 101 states have (on average 2.623762376237624) internal successors, (265), 101 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:02:20,050 INFO L276 IsEmpty]: Start isEmpty. Operand 10992 states and 13297 transitions. [2022-12-14 10:02:20,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 10:02:20,054 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:02:20,054 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2022-12-14 10:02:20,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-12-14 10:02:20,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:02:20,255 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 10:02:20,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:02:20,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1878948892, now seen corresponding path program 25 times [2022-12-14 10:02:20,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:02:20,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145798966] [2022-12-14 10:02:20,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:02:20,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:02:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:02:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 144 proven. 519 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:02:21,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:02:21,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145798966] [2022-12-14 10:02:21,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145798966] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:02:21,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397236262] [2022-12-14 10:02:21,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:02:21,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:02:21,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:02:21,323 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:02:21,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-12-14 10:02:21,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:02:21,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 135 conjunts are in the unsatisfiable core [2022-12-14 10:02:21,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:02:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 144 proven. 519 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:02:21,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:02:22,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 10:02:22,300 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 144 proven. 519 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:02:22,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397236262] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:02:22,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1775216166] [2022-12-14 10:02:22,301 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 10:02:22,301 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:02:22,301 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:02:22,301 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:02:22,301 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:02:22,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:02:22,334 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 [2022-12-14 10:02:22,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:02:22,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:02:22,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:02:22,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:02:22,474 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:02:22,475 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 25 treesize of output 24 [2022-12-14 10:02:22,840 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:02:25,020 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '521533#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 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_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:02:25,020 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:02:25,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:02:25,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 49 [2022-12-14 10:02:25,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011370341] [2022-12-14 10:02:25,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:02:25,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 10:02:25,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:02:25,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 10:02:25,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=3573, Unknown=0, NotChecked=0, Total=3906 [2022-12-14 10:02:25,021 INFO L87 Difference]: Start difference. First operand 10992 states and 13297 transitions. Second operand has 51 states, 50 states have (on average 3.9) internal successors, (195), 50 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:02:26,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:02:26,881 INFO L93 Difference]: Finished difference Result 17668 states and 21368 transitions. [2022-12-14 10:02:26,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-14 10:02:26,881 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 3.9) internal successors, (195), 50 states have internal predecessors, (195), 0 states have call successors, (0), 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 111 [2022-12-14 10:02:26,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:02:26,892 INFO L225 Difference]: With dead ends: 17668 [2022-12-14 10:02:26,892 INFO L226 Difference]: Without dead ends: 17668 [2022-12-14 10:02:26,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 287 SyntacticMatches, 14 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1154, Invalid=7402, Unknown=0, NotChecked=0, Total=8556 [2022-12-14 10:02:26,893 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 590 mSDsluCounter, 2293 mSDsCounter, 0 mSdLazyCounter, 3569 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 2372 SdHoareTripleChecker+Invalid, 3569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:02:26,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [590 Valid, 2372 Invalid, 3569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3569 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 10:02:26,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17668 states. [2022-12-14 10:02:26,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17668 to 11714. [2022-12-14 10:02:26,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11714 states, 11712 states have (on average 1.2102117486338797) internal successors, (14174), 11713 states have internal predecessors, (14174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:02:26,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11714 states to 11714 states and 14174 transitions. [2022-12-14 10:02:26,999 INFO L78 Accepts]: Start accepts. Automaton has 11714 states and 14174 transitions. Word has length 111 [2022-12-14 10:02:26,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:02:26,999 INFO L495 AbstractCegarLoop]: Abstraction has 11714 states and 14174 transitions. [2022-12-14 10:02:26,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 3.9) internal successors, (195), 50 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:02:26,999 INFO L276 IsEmpty]: Start isEmpty. Operand 11714 states and 14174 transitions. [2022-12-14 10:02:27,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 10:02:27,003 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:02:27,003 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:02:27,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-12-14 10:02:27,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:02:27,204 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 10:02:27,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:02:27,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1265314698, now seen corresponding path program 34 times [2022-12-14 10:02:27,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:02:27,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319753028] [2022-12-14 10:02:27,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:02:27,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:02:27,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:02:28,661 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 36 proven. 901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:02:28,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:02:28,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319753028] [2022-12-14 10:02:28,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319753028] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:02:28,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052833506] [2022-12-14 10:02:28,661 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:02:28,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:02:28,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:02:28,662 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:02:28,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-12-14 10:02:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:02:28,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 200 conjunts are in the unsatisfiable core [2022-12-14 10:02:28,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:02:29,232 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 [2022-12-14 10:02:29,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 10:02:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 36 proven. 901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:02:29,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:02:29,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-14 10:02:29,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:02:29,704 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 36 proven. 901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:02:29,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052833506] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:02:29,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1784962515] [2022-12-14 10:02:29,705 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 10:02:29,705 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:02:29,705 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:02:29,705 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:02:29,706 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:02:29,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:02:29,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:02:29,751 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 11 treesize of output 7 [2022-12-14 10:02:29,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:02:29,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:02:29,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:02:29,866 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:02:29,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:02:30,070 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:02:32,381 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '551742#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 10:02:32,381 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:02:32,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:02:32,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 71 [2022-12-14 10:02:32,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54688799] [2022-12-14 10:02:32,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:02:32,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-12-14 10:02:32,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:02:32,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-12-14 10:02:32,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=6547, Unknown=0, NotChecked=0, Total=6806 [2022-12-14 10:02:32,382 INFO L87 Difference]: Start difference. First operand 11714 states and 14174 transitions. Second operand has 71 states, 71 states have (on average 2.323943661971831) internal successors, (165), 71 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:02:38,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:02:38,804 INFO L93 Difference]: Finished difference Result 14799 states and 17697 transitions. [2022-12-14 10:02:38,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-12-14 10:02:38,805 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.323943661971831) internal successors, (165), 71 states have internal predecessors, (165), 0 states have call successors, (0), 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 115 [2022-12-14 10:02:38,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:02:38,812 INFO L225 Difference]: With dead ends: 14799 [2022-12-14 10:02:38,812 INFO L226 Difference]: Without dead ends: 13355 [2022-12-14 10:02:38,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 303 SyntacticMatches, 3 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 5733 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1283, Invalid=24799, Unknown=0, NotChecked=0, Total=26082 [2022-12-14 10:02:38,814 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 990 mSDsluCounter, 10406 mSDsCounter, 0 mSdLazyCounter, 11020 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 990 SdHoareTripleChecker+Valid, 10647 SdHoareTripleChecker+Invalid, 11045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 11020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:02:38,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [990 Valid, 10647 Invalid, 11045 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [25 Valid, 11020 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-12-14 10:02:38,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13355 states. [2022-12-14 10:02:38,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13355 to 12782. [2022-12-14 10:02:38,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12782 states, 12780 states have (on average 1.2114241001564945) internal successors, (15482), 12781 states have internal predecessors, (15482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:02:38,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12782 states to 12782 states and 15482 transitions. [2022-12-14 10:02:38,911 INFO L78 Accepts]: Start accepts. Automaton has 12782 states and 15482 transitions. Word has length 115 [2022-12-14 10:02:38,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:02:38,911 INFO L495 AbstractCegarLoop]: Abstraction has 12782 states and 15482 transitions. [2022-12-14 10:02:38,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.323943661971831) internal successors, (165), 71 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:02:38,911 INFO L276 IsEmpty]: Start isEmpty. Operand 12782 states and 15482 transitions. [2022-12-14 10:02:38,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-12-14 10:02:38,915 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:02:38,915 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:02:38,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-12-14 10:02:39,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:02:39,116 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 10:02:39,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:02:39,117 INFO L85 PathProgramCache]: Analyzing trace with hash -757683800, now seen corresponding path program 35 times [2022-12-14 10:02:39,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:02:39,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866322162] [2022-12-14 10:02:39,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:02:39,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:02:39,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:02:40,714 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 256 proven. 716 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:02:40,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:02:40,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866322162] [2022-12-14 10:02:40,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866322162] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:02:40,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468830894] [2022-12-14 10:02:40,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:02:40,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:02:40,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:02:40,715 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:02:40,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-12-14 10:02:41,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-12-14 10:02:41,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:02:41,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 146 conjunts are in the unsatisfiable core [2022-12-14 10:02:41,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:02:42,481 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 289 proven. 683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:02:42,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:02:43,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 10:02:44,074 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 289 proven. 683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:02:44,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468830894] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:02:44,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1391554951] [2022-12-14 10:02:44,075 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 10:02:44,075 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:02:44,075 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:02:44,075 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:02:44,075 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:02:44,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:02:44,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:02:44,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:02:44,144 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 [2022-12-14 10:02:44,158 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 [2022-12-14 10:02:44,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:02:44,232 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:02:44,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:02:44,418 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:02:47,248 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '580296#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 10:02:47,248 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:02:47,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:02:47,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 106 [2022-12-14 10:02:47,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454534460] [2022-12-14 10:02:47,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:02:47,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-12-14 10:02:47,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:02:47,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-12-14 10:02:47,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1683, Invalid=12359, Unknown=0, NotChecked=0, Total=14042 [2022-12-14 10:02:47,250 INFO L87 Difference]: Start difference. First operand 12782 states and 15482 transitions. Second operand has 107 states, 106 states have (on average 2.9339622641509435) internal successors, (311), 107 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:02:50,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:02:50,861 INFO L93 Difference]: Finished difference Result 13889 states and 16597 transitions. [2022-12-14 10:02:50,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-12-14 10:02:50,861 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 106 states have (on average 2.9339622641509435) internal successors, (311), 107 states have internal predecessors, (311), 0 states have call successors, (0), 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 117 [2022-12-14 10:02:50,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:02:50,868 INFO L225 Difference]: With dead ends: 13889 [2022-12-14 10:02:50,868 INFO L226 Difference]: Without dead ends: 13889 [2022-12-14 10:02:50,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 255 SyntacticMatches, 19 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9973 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=5285, Invalid=26221, Unknown=0, NotChecked=0, Total=31506 [2022-12-14 10:02:50,870 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 1027 mSDsluCounter, 2991 mSDsCounter, 0 mSdLazyCounter, 4188 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1027 SdHoareTripleChecker+Valid, 3115 SdHoareTripleChecker+Invalid, 4190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:02:50,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1027 Valid, 3115 Invalid, 4190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4188 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 10:02:50,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13889 states. [2022-12-14 10:02:50,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13889 to 12890. [2022-12-14 10:02:50,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12890 states, 12888 states have (on average 1.2116697703289883) internal successors, (15616), 12889 states have internal predecessors, (15616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:02:50,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12890 states to 12890 states and 15616 transitions. [2022-12-14 10:02:50,976 INFO L78 Accepts]: Start accepts. Automaton has 12890 states and 15616 transitions. Word has length 117 [2022-12-14 10:02:50,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:02:50,976 INFO L495 AbstractCegarLoop]: Abstraction has 12890 states and 15616 transitions. [2022-12-14 10:02:50,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 106 states have (on average 2.9339622641509435) internal successors, (311), 107 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:02:50,976 INFO L276 IsEmpty]: Start isEmpty. Operand 12890 states and 15616 transitions. [2022-12-14 10:02:50,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-12-14 10:02:50,981 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:02:50,981 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2022-12-14 10:02:50,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-12-14 10:02:51,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-12-14 10:02:51,182 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 10:02:51,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:02:51,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1863871143, now seen corresponding path program 26 times [2022-12-14 10:02:51,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:02:51,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65381360] [2022-12-14 10:02:51,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:02:51,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:02:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:02:52,964 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 28 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:02:52,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:02:52,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65381360] [2022-12-14 10:02:52,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65381360] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:02:52,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793956116] [2022-12-14 10:02:52,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:02:52,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:02:52,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:02:52,966 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:02:52,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-12-14 10:02:53,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-12-14 10:02:53,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:02:53,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 167 conjunts are in the unsatisfiable core [2022-12-14 10:02:53,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:02:53,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 10:02:54,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:02:54,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 10:02:54,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 10:02:54,681 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 28 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:02:54,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:02:54,782 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3354 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3354) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 13 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-12-14 10:02:54,785 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:02:54,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 10:02:54,788 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:02:54,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-14 10:02:55,066 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 28 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:02:55,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793956116] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:02:55,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1159805241] [2022-12-14 10:02:55,067 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 10:02:55,067 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:02:55,067 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:02:55,067 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:02:55,067 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:02:55,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:02:55,089 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 [2022-12-14 10:02:55,118 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 11 treesize of output 7 [2022-12-14 10:02:55,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:02:55,184 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 [2022-12-14 10:02:55,233 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 [2022-12-14 10:02:55,272 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:02:55,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:02:55,606 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:02:58,661 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '607963#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 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_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:02:58,662 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:02:58,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:02:58,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 35, 35] total 61 [2022-12-14 10:02:58,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122188007] [2022-12-14 10:02:58,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:02:58,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-12-14 10:02:58,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:02:58,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-12-14 10:02:58,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=5078, Unknown=1, NotChecked=142, Total=5402 [2022-12-14 10:02:58,663 INFO L87 Difference]: Start difference. First operand 12890 states and 15616 transitions. Second operand has 62 states, 62 states have (on average 2.564516129032258) internal successors, (159), 61 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:03:07,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:03:07,125 INFO L93 Difference]: Finished difference Result 30435 states and 36718 transitions. [2022-12-14 10:03:07,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-12-14 10:03:07,126 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.564516129032258) internal successors, (159), 61 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2022-12-14 10:03:07,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:03:07,138 INFO L225 Difference]: With dead ends: 30435 [2022-12-14 10:03:07,138 INFO L226 Difference]: Without dead ends: 20319 [2022-12-14 10:03:07,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 313 SyntacticMatches, 3 SemanticMatches, 145 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 3701 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=896, Invalid=20277, Unknown=1, NotChecked=288, Total=21462 [2022-12-14 10:03:07,139 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 1097 mSDsluCounter, 8924 mSDsCounter, 0 mSdLazyCounter, 11001 mSolverCounterSat, 17 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1097 SdHoareTripleChecker+Valid, 9110 SdHoareTripleChecker+Invalid, 11409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 11001 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 385 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:03:07,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1097 Valid, 9110 Invalid, 11409 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [17 Valid, 11001 Invalid, 6 Unknown, 385 Unchecked, 4.1s Time] [2022-12-14 10:03:07,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20319 states. [2022-12-14 10:03:07,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20319 to 13011. [2022-12-14 10:03:07,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13011 states, 13009 states have (on average 1.211392113152433) internal successors, (15759), 13010 states have internal predecessors, (15759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:03:07,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13011 states to 13011 states and 15759 transitions. [2022-12-14 10:03:07,268 INFO L78 Accepts]: Start accepts. Automaton has 13011 states and 15759 transitions. Word has length 117 [2022-12-14 10:03:07,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:03:07,268 INFO L495 AbstractCegarLoop]: Abstraction has 13011 states and 15759 transitions. [2022-12-14 10:03:07,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.564516129032258) internal successors, (159), 61 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:03:07,268 INFO L276 IsEmpty]: Start isEmpty. Operand 13011 states and 15759 transitions. [2022-12-14 10:03:07,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-12-14 10:03:07,272 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:03:07,273 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2022-12-14 10:03:07,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-12-14 10:03:07,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:03:07,473 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 10:03:07,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:03:07,474 INFO L85 PathProgramCache]: Analyzing trace with hash 562640726, now seen corresponding path program 27 times [2022-12-14 10:03:07,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:03:07,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582790053] [2022-12-14 10:03:07,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:03:07,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:03:07,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:03:08,559 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 144 proven. 626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:03:08,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:03:08,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582790053] [2022-12-14 10:03:08,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582790053] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:03:08,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657621155] [2022-12-14 10:03:08,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:03:08,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:03:08,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:03:08,560 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:03:08,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-12-14 10:03:09,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:03:09,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:03:09,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 149 conjunts are in the unsatisfiable core [2022-12-14 10:03:09,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:03:09,781 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 169 proven. 601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:03:09,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:03:10,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-12-14 10:03:10,887 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 169 proven. 601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:03:10,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657621155] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:03:10,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [167692685] [2022-12-14 10:03:10,888 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 10:03:10,888 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:03:10,888 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:03:10,888 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:03:10,888 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:03:10,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:03:10,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:03:10,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:03:10,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:03:10,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:03:11,010 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 14 treesize of output 10 [2022-12-14 10:03:11,047 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:03:11,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:03:11,367 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:03:13,952 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '652359#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 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_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:03:13,952 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:03:13,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:03:13,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 82 [2022-12-14 10:03:13,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559855322] [2022-12-14 10:03:13,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:03:13,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-12-14 10:03:13,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:03:13,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-12-14 10:03:13,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=911, Invalid=8209, Unknown=0, NotChecked=0, Total=9120 [2022-12-14 10:03:13,954 INFO L87 Difference]: Start difference. First operand 13011 states and 15759 transitions. Second operand has 84 states, 83 states have (on average 3.289156626506024) internal successors, (273), 83 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:03:16,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:03:16,684 INFO L93 Difference]: Finished difference Result 21119 states and 25585 transitions. [2022-12-14 10:03:16,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 10:03:16,684 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 3.289156626506024) internal successors, (273), 83 states have internal predecessors, (273), 0 states have call successors, (0), 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 119 [2022-12-14 10:03:16,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:03:16,697 INFO L225 Difference]: With dead ends: 21119 [2022-12-14 10:03:16,697 INFO L226 Difference]: Without dead ends: 21119 [2022-12-14 10:03:16,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3677 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2828, Invalid=13684, Unknown=0, NotChecked=0, Total=16512 [2022-12-14 10:03:16,698 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 1142 mSDsluCounter, 2631 mSDsCounter, 0 mSdLazyCounter, 4280 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1142 SdHoareTripleChecker+Valid, 2720 SdHoareTripleChecker+Invalid, 4280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:03:16,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1142 Valid, 2720 Invalid, 4280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4280 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 10:03:16,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21119 states. [2022-12-14 10:03:16,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21119 to 13811. [2022-12-14 10:03:16,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13811 states, 13809 states have (on average 1.2116735462379606) internal successors, (16732), 13810 states have internal predecessors, (16732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:03:16,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13811 states to 13811 states and 16732 transitions. [2022-12-14 10:03:16,835 INFO L78 Accepts]: Start accepts. Automaton has 13811 states and 16732 transitions. Word has length 119 [2022-12-14 10:03:16,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:03:16,835 INFO L495 AbstractCegarLoop]: Abstraction has 13811 states and 16732 transitions. [2022-12-14 10:03:16,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 83 states have (on average 3.289156626506024) internal successors, (273), 83 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:03:16,835 INFO L276 IsEmpty]: Start isEmpty. Operand 13811 states and 16732 transitions. [2022-12-14 10:03:16,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-14 10:03:16,840 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:03:16,840 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:03:16,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-12-14 10:03:17,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:03:17,041 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 10:03:17,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:03:17,042 INFO L85 PathProgramCache]: Analyzing trace with hash -800407123, now seen corresponding path program 36 times [2022-12-14 10:03:17,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:03:17,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112391762] [2022-12-14 10:03:17,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:03:17,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:03:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:03:18,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 38 proven. 1008 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:03:18,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:03:18,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112391762] [2022-12-14 10:03:18,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112391762] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:03:18,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805921138] [2022-12-14 10:03:18,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:03:18,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:03:18,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:03:18,578 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:03:18,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-12-14 10:03:19,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:03:19,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:03:19,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 208 conjunts are in the unsatisfiable core [2022-12-14 10:03:19,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:03:19,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:03:19,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 10:03:19,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 38 proven. 1008 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:03:19,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:03:19,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-14 10:03:19,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:03:19,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 38 proven. 1008 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:03:19,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805921138] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:03:19,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1678203222] [2022-12-14 10:03:19,996 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 10:03:19,996 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:03:19,996 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:03:19,996 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:03:19,996 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:03:20,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:03:20,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:03:20,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:03:20,068 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 [2022-12-14 10:03:20,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:03:20,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:03:20,146 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:03:20,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:03:20,346 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:03:23,027 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '688161#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 10:03:23,027 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:03:23,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:03:23,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 74 [2022-12-14 10:03:23,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490884202] [2022-12-14 10:03:23,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:03:23,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-12-14 10:03:23,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:03:23,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-12-14 10:03:23,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=7043, Unknown=0, NotChecked=0, Total=7310 [2022-12-14 10:03:23,028 INFO L87 Difference]: Start difference. First operand 13811 states and 16732 transitions. Second operand has 74 states, 74 states have (on average 2.3378378378378377) internal successors, (173), 74 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:03:29,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:03:29,709 INFO L93 Difference]: Finished difference Result 17299 states and 20720 transitions. [2022-12-14 10:03:29,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-12-14 10:03:29,710 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.3378378378378377) internal successors, (173), 74 states have internal predecessors, (173), 0 states have call successors, (0), 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 121 [2022-12-14 10:03:29,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:03:29,718 INFO L225 Difference]: With dead ends: 17299 [2022-12-14 10:03:29,719 INFO L226 Difference]: Without dead ends: 15659 [2022-12-14 10:03:29,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 320 SyntacticMatches, 3 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 6231 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1341, Invalid=27051, Unknown=0, NotChecked=0, Total=28392 [2022-12-14 10:03:29,720 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 1303 mSDsluCounter, 11024 mSDsCounter, 0 mSdLazyCounter, 11794 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1303 SdHoareTripleChecker+Valid, 11279 SdHoareTripleChecker+Invalid, 11820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 11794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:03:29,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1303 Valid, 11279 Invalid, 11820 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [26 Valid, 11794 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-12-14 10:03:29,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15659 states. [2022-12-14 10:03:29,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15659 to 15015. [2022-12-14 10:03:29,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15015 states, 15013 states have (on average 1.2128155598481316) internal successors, (18208), 15014 states have internal predecessors, (18208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:03:29,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15015 states to 15015 states and 18208 transitions. [2022-12-14 10:03:29,839 INFO L78 Accepts]: Start accepts. Automaton has 15015 states and 18208 transitions. Word has length 121 [2022-12-14 10:03:29,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:03:29,839 INFO L495 AbstractCegarLoop]: Abstraction has 15015 states and 18208 transitions. [2022-12-14 10:03:29,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.3378378378378377) internal successors, (173), 74 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:03:29,840 INFO L276 IsEmpty]: Start isEmpty. Operand 15015 states and 18208 transitions. [2022-12-14 10:03:29,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 10:03:29,844 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:03:29,844 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:03:29,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-12-14 10:03:30,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:03:30,045 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 10:03:30,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:03:30,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1603973451, now seen corresponding path program 37 times [2022-12-14 10:03:30,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:03:30,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241776602] [2022-12-14 10:03:30,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:03:30,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:03:30,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:03:31,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 289 proven. 794 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:03:31,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:03:31,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241776602] [2022-12-14 10:03:31,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241776602] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:03:31,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086629128] [2022-12-14 10:03:31,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:03:31,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:03:31,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:03:31,965 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:03:31,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-12-14 10:03:32,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:03:32,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 189 conjunts are in the unsatisfiable core [2022-12-14 10:03:32,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:03:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 324 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:03:32,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:03:33,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 10:03:34,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 324 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:03:34,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086629128] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:03:34,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [971511048] [2022-12-14 10:03:34,446 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 10:03:34,446 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:03:34,446 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:03:34,446 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:03:34,446 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:03:34,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:03:34,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:03:34,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:03:34,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:03:34,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:03:34,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:03:34,603 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:03:34,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:03:34,781 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:03:37,381 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '721477#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 10:03:37,382 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:03:37,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:03:37,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 91 [2022-12-14 10:03:37,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322494687] [2022-12-14 10:03:37,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:03:37,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-12-14 10:03:37,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:03:37,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-12-14 10:03:37,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1015, Invalid=9697, Unknown=0, NotChecked=0, Total=10712 [2022-12-14 10:03:37,383 INFO L87 Difference]: Start difference. First operand 15015 states and 18208 transitions. Second operand has 92 states, 91 states have (on average 2.758241758241758) internal successors, (251), 92 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:03:42,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:03:42,732 INFO L93 Difference]: Finished difference Result 16262 states and 19464 transitions. [2022-12-14 10:03:42,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-12-14 10:03:42,732 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 2.758241758241758) internal successors, (251), 92 states have internal predecessors, (251), 0 states have call successors, (0), 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 123 [2022-12-14 10:03:42,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:03:42,741 INFO L225 Difference]: With dead ends: 16262 [2022-12-14 10:03:42,741 INFO L226 Difference]: Without dead ends: 16262 [2022-12-14 10:03:42,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 289 SyntacticMatches, 20 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7801 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=4505, Invalid=22885, Unknown=0, NotChecked=0, Total=27390 [2022-12-14 10:03:42,742 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 1033 mSDsluCounter, 3872 mSDsCounter, 0 mSdLazyCounter, 6686 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1033 SdHoareTripleChecker+Valid, 3976 SdHoareTripleChecker+Invalid, 6688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:03:42,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1033 Valid, 3976 Invalid, 6688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6686 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 10:03:42,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16262 states. [2022-12-14 10:03:42,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16262 to 15131. [2022-12-14 10:03:42,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15131 states, 15129 states have (on average 1.213034569370084) internal successors, (18352), 15130 states have internal predecessors, (18352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:03:42,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15131 states to 15131 states and 18352 transitions. [2022-12-14 10:03:42,870 INFO L78 Accepts]: Start accepts. Automaton has 15131 states and 18352 transitions. Word has length 123 [2022-12-14 10:03:42,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:03:42,870 INFO L495 AbstractCegarLoop]: Abstraction has 15131 states and 18352 transitions. [2022-12-14 10:03:42,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 2.758241758241758) internal successors, (251), 92 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:03:42,870 INFO L276 IsEmpty]: Start isEmpty. Operand 15131 states and 18352 transitions. [2022-12-14 10:03:42,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 10:03:42,875 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:03:42,875 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2022-12-14 10:03:42,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-12-14 10:03:43,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:03:43,076 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 10:03:43,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:03:43,077 INFO L85 PathProgramCache]: Analyzing trace with hash 2056540769, now seen corresponding path program 28 times [2022-12-14 10:03:43,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:03:43,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564894940] [2022-12-14 10:03:43,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:03:43,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:03:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:03:44,797 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 30 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:03:44,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:03:44,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564894940] [2022-12-14 10:03:44,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564894940] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:03:44,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212461409] [2022-12-14 10:03:44,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:03:44,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:03:44,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:03:44,798 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:03:44,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-12-14 10:03:45,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:03:45,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 199 conjunts are in the unsatisfiable core [2022-12-14 10:03:45,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:03:45,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:03:45,879 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-12-14 10:03:45,879 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 36 [2022-12-14 10:03:49,351 INFO L321 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2022-12-14 10:03:49,351 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 25 treesize of output 13 [2022-12-14 10:03:49,356 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 30 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:03:49,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:03:50,432 INFO L321 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2022-12-14 10:03:50,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 100 treesize of output 109 [2022-12-14 10:03:50,442 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:03:50,443 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 41 treesize of output 43 [2022-12-14 10:03:50,452 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 20 treesize of output 18 [2022-12-14 10:03:50,564 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:03:50,564 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 137 treesize of output 150 [2022-12-14 10:03:52,382 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 31 proven. 825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:03:52,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212461409] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:03:52,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1357901843] [2022-12-14 10:03:52,383 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 10:03:52,383 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:03:52,383 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:03:52,383 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:03:52,383 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:03:52,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:03:52,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:03:52,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:03:52,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:03:52,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:03:52,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:03:52,632 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:03:52,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:03:52,907 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:03:56,323 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '753860#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 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_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:03:56,323 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:03:56,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:03:56,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 42, 42] total 109 [2022-12-14 10:03:56,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223159396] [2022-12-14 10:03:56,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:03:56,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-12-14 10:03:56,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:03:56,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-12-14 10:03:56,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=14428, Unknown=0, NotChecked=0, Total=14762 [2022-12-14 10:03:56,325 INFO L87 Difference]: Start difference. First operand 15131 states and 18352 transitions. Second operand has 110 states, 110 states have (on average 3.0090909090909093) internal successors, (331), 109 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:04:13,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:04:13,995 INFO L93 Difference]: Finished difference Result 36116 states and 43650 transitions. [2022-12-14 10:04:13,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-12-14 10:04:13,995 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 3.0090909090909093) internal successors, (331), 109 states have internal predecessors, (331), 0 states have call successors, (0), 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 125 [2022-12-14 10:04:13,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:04:14,011 INFO L225 Difference]: With dead ends: 36116 [2022-12-14 10:04:14,011 INFO L226 Difference]: Without dead ends: 24108 [2022-12-14 10:04:14,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8696 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=1795, Invalid=49507, Unknown=0, NotChecked=0, Total=51302 [2022-12-14 10:04:14,013 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 2044 mSDsluCounter, 14401 mSDsCounter, 0 mSdLazyCounter, 17633 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2044 SdHoareTripleChecker+Valid, 14597 SdHoareTripleChecker+Invalid, 17656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 17633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:04:14,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2044 Valid, 14597 Invalid, 17656 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [23 Valid, 17633 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2022-12-14 10:04:14,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24108 states. [2022-12-14 10:04:14,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24108 to 15258. [2022-12-14 10:04:14,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15258 states, 15256 states have (on average 1.212768746722601) internal successors, (18502), 15257 states have internal predecessors, (18502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:04:14,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15258 states to 15258 states and 18502 transitions. [2022-12-14 10:04:14,169 INFO L78 Accepts]: Start accepts. Automaton has 15258 states and 18502 transitions. Word has length 125 [2022-12-14 10:04:14,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:04:14,170 INFO L495 AbstractCegarLoop]: Abstraction has 15258 states and 18502 transitions. [2022-12-14 10:04:14,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 3.0090909090909093) internal successors, (331), 109 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:04:14,170 INFO L276 IsEmpty]: Start isEmpty. Operand 15258 states and 18502 transitions. [2022-12-14 10:04:14,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-12-14 10:04:14,175 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:04:14,176 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:04:14,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-12-14 10:04:14,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-12-14 10:04:14,377 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 10:04:14,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:04:14,378 INFO L85 PathProgramCache]: Analyzing trace with hash -961790000, now seen corresponding path program 38 times [2022-12-14 10:04:14,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:04:14,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904795058] [2022-12-14 10:04:14,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:04:14,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:04:14,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:04:16,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 40 proven. 1121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:04:16,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:04:16,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904795058] [2022-12-14 10:04:16,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904795058] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:04:16,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76203380] [2022-12-14 10:04:16,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:04:16,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:04:16,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:04:16,403 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:04:16,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-12-14 10:04:18,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2022-12-14 10:04:18,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:04:18,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 250 conjunts are in the unsatisfiable core [2022-12-14 10:04:18,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:04:18,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 10:04:19,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:04:19,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:04:24,131 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 10:04:24,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 13 [2022-12-14 10:04:24,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 40 proven. 1121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:04:24,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:04:26,534 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:04:26,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-12-14 10:04:26,538 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:04:26,538 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 27 treesize of output 31 [2022-12-14 10:04:26,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:04:26,551 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:04:26,551 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 34 treesize of output 37 [2022-12-14 10:04:34,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 40 proven. 1121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:04:34,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76203380] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:04:34,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [910224372] [2022-12-14 10:04:34,329 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 10:04:34,329 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:04:34,329 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:04:34,329 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:04:34,330 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:04:34,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:04:34,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:04:34,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:04:34,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:04:34,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:04:34,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:04:34,493 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:04:34,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:04:34,693 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:04:38,253 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '806334#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 10:04:38,253 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:04:38,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:04:38,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 49, 49] total 122 [2022-12-14 10:04:38,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307784507] [2022-12-14 10:04:38,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:04:38,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-12-14 10:04:38,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:04:38,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-12-14 10:04:38,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=17406, Unknown=3, NotChecked=0, Total=17822 [2022-12-14 10:04:38,255 INFO L87 Difference]: Start difference. First operand 15258 states and 18502 transitions. Second operand has 122 states, 122 states have (on average 2.4344262295081966) internal successors, (297), 122 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:05:01,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:05:01,391 INFO L93 Difference]: Finished difference Result 19212 states and 23002 transitions. [2022-12-14 10:05:01,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2022-12-14 10:05:01,391 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.4344262295081966) internal successors, (297), 122 states have internal predecessors, (297), 0 states have call successors, (0), 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 127 [2022-12-14 10:05:01,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:05:01,400 INFO L225 Difference]: With dead ends: 19212 [2022-12-14 10:05:01,401 INFO L226 Difference]: Without dead ends: 17286 [2022-12-14 10:05:01,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20553 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=2704, Invalid=81103, Unknown=3, NotChecked=0, Total=83810 [2022-12-14 10:05:01,403 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 1605 mSDsluCounter, 18099 mSDsCounter, 0 mSdLazyCounter, 20986 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1605 SdHoareTripleChecker+Valid, 18365 SdHoareTripleChecker+Invalid, 21033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 20986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2022-12-14 10:05:01,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1605 Valid, 18365 Invalid, 21033 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [47 Valid, 20986 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time] [2022-12-14 10:05:01,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17286 states. [2022-12-14 10:05:01,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17286 to 16524. [2022-12-14 10:05:01,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16524 states, 16522 states have (on average 1.213836097324779) internal successors, (20055), 16523 states have internal predecessors, (20055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:05:01,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16524 states to 16524 states and 20055 transitions. [2022-12-14 10:05:01,525 INFO L78 Accepts]: Start accepts. Automaton has 16524 states and 20055 transitions. Word has length 127 [2022-12-14 10:05:01,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:05:01,525 INFO L495 AbstractCegarLoop]: Abstraction has 16524 states and 20055 transitions. [2022-12-14 10:05:01,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.4344262295081966) internal successors, (297), 122 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:05:01,525 INFO L276 IsEmpty]: Start isEmpty. Operand 16524 states and 20055 transitions. [2022-12-14 10:05:01,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-12-14 10:05:01,530 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:05:01,530 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2022-12-14 10:05:01,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-12-14 10:05:01,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:05:01,731 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 10:05:01,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:05:01,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1606352880, now seen corresponding path program 29 times [2022-12-14 10:05:01,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:05:01,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693813688] [2022-12-14 10:05:01,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:05:01,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:05:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:05:02,964 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 169 proven. 716 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:05:02,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:05:02,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693813688] [2022-12-14 10:05:02,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693813688] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:05:02,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237250169] [2022-12-14 10:05:02,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:05:02,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:05:02,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:05:02,965 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:05:02,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-12-14 10:05:03,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-12-14 10:05:03,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:05:03,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 174 conjunts are in the unsatisfiable core [2022-12-14 10:05:03,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:05:04,870 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 885 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:05:04,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:05:05,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:05:06,475 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 196 proven. 689 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:05:06,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237250169] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:05:06,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2103084349] [2022-12-14 10:05:06,476 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 10:05:06,476 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:05:06,476 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:05:06,476 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:05:06,476 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:05:06,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:05:06,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:05:06,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:05:06,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:05:06,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:05:06,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:05:06,621 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:05:06,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:05:06,934 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:05:09,744 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '843254#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 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_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:05:09,744 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:05:09,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:05:09,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 101 [2022-12-14 10:05:09,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019359620] [2022-12-14 10:05:09,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:05:09,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-12-14 10:05:09,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:05:09,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-12-14 10:05:09,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1236, Invalid=11874, Unknown=0, NotChecked=0, Total=13110 [2022-12-14 10:05:09,745 INFO L87 Difference]: Start difference. First operand 16524 states and 20055 transitions. Second operand has 103 states, 102 states have (on average 3.6666666666666665) internal successors, (374), 102 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:05:12,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:05:12,462 INFO L93 Difference]: Finished difference Result 26339 states and 31976 transitions. [2022-12-14 10:05:12,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-14 10:05:12,463 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 102 states have (on average 3.6666666666666665) internal successors, (374), 102 states have internal predecessors, (374), 0 states have call successors, (0), 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 127 [2022-12-14 10:05:12,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:05:12,481 INFO L225 Difference]: With dead ends: 26339 [2022-12-14 10:05:12,481 INFO L226 Difference]: Without dead ends: 26339 [2022-12-14 10:05:12,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 300 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6562 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=2907, Invalid=19443, Unknown=0, NotChecked=0, Total=22350 [2022-12-14 10:05:12,482 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 1912 mSDsluCounter, 4175 mSDsCounter, 0 mSdLazyCounter, 5825 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1912 SdHoareTripleChecker+Valid, 4340 SdHoareTripleChecker+Invalid, 5825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 10:05:12,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1912 Valid, 4340 Invalid, 5825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5825 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 10:05:12,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26339 states. [2022-12-14 10:05:12,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26339 to 17488. [2022-12-14 10:05:12,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17488 states, 17486 states have (on average 1.2141141484616265) internal successors, (21230), 17487 states have internal predecessors, (21230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:05:12,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17488 states to 17488 states and 21230 transitions. [2022-12-14 10:05:12,655 INFO L78 Accepts]: Start accepts. Automaton has 17488 states and 21230 transitions. Word has length 127 [2022-12-14 10:05:12,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:05:12,655 INFO L495 AbstractCegarLoop]: Abstraction has 17488 states and 21230 transitions. [2022-12-14 10:05:12,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 102 states have (on average 3.6666666666666665) internal successors, (374), 102 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:05:12,656 INFO L276 IsEmpty]: Start isEmpty. Operand 17488 states and 21230 transitions. [2022-12-14 10:05:12,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-14 10:05:12,662 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:05:12,662 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:05:12,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-12-14 10:05:12,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:05:12,863 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 10:05:12,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:05:12,864 INFO L85 PathProgramCache]: Analyzing trace with hash -165314322, now seen corresponding path program 39 times [2022-12-14 10:05:12,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:05:12,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152269350] [2022-12-14 10:05:12,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:05:12,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:05:12,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:05:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 324 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:05:14,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:05:14,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152269350] [2022-12-14 10:05:14,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152269350] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:05:14,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390463681] [2022-12-14 10:05:14,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:05:14,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:05:14,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:05:14,736 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:05:14,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-12-14 10:05:15,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:05:15,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:05:15,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 204 conjunts are in the unsatisfiable core [2022-12-14 10:05:15,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:05:15,370 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 10:05:15,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 10:05:16,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 361 proven. 839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:05:16,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:05:18,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 361 proven. 839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:05:18,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390463681] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:05:18,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [955695064] [2022-12-14 10:05:18,882 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 10:05:18,882 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:05:18,882 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:05:18,882 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:05:18,882 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:05:18,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:05:18,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:05:18,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:05:18,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:05:18,965 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 [2022-12-14 10:05:18,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:05:19,021 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:05:19,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:05:19,226 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:05:21,945 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '888048#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 10:05:21,945 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:05:21,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:05:21,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 115 [2022-12-14 10:05:21,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265941947] [2022-12-14 10:05:21,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:05:21,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-12-14 10:05:21,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:05:21,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-12-14 10:05:21,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1905, Invalid=14607, Unknown=0, NotChecked=0, Total=16512 [2022-12-14 10:05:21,947 INFO L87 Difference]: Start difference. First operand 17488 states and 21230 transitions. Second operand has 117 states, 116 states have (on average 2.646551724137931) internal successors, (307), 116 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:05:27,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:05:27,466 INFO L93 Difference]: Finished difference Result 18883 states and 22635 transitions. [2022-12-14 10:05:27,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-12-14 10:05:27,466 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 116 states have (on average 2.646551724137931) internal successors, (307), 116 states have internal predecessors, (307), 0 states have call successors, (0), 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 129 [2022-12-14 10:05:27,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:05:27,476 INFO L225 Difference]: With dead ends: 18883 [2022-12-14 10:05:27,476 INFO L226 Difference]: Without dead ends: 18883 [2022-12-14 10:05:27,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9304 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=7007, Invalid=30435, Unknown=0, NotChecked=0, Total=37442 [2022-12-14 10:05:27,477 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 1411 mSDsluCounter, 4596 mSDsCounter, 0 mSdLazyCounter, 7334 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1411 SdHoareTripleChecker+Valid, 4730 SdHoareTripleChecker+Invalid, 7336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:05:27,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1411 Valid, 4730 Invalid, 7336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7334 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-12-14 10:05:27,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18883 states. [2022-12-14 10:05:27,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18883 to 17612. [2022-12-14 10:05:27,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17612 states, 17610 states have (on average 1.2143100511073255) internal successors, (21384), 17611 states have internal predecessors, (21384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:05:27,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17612 states to 17612 states and 21384 transitions. [2022-12-14 10:05:27,617 INFO L78 Accepts]: Start accepts. Automaton has 17612 states and 21384 transitions. Word has length 129 [2022-12-14 10:05:27,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:05:27,617 INFO L495 AbstractCegarLoop]: Abstraction has 17612 states and 21384 transitions. [2022-12-14 10:05:27,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 116 states have (on average 2.646551724137931) internal successors, (307), 116 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:05:27,617 INFO L276 IsEmpty]: Start isEmpty. Operand 17612 states and 21384 transitions. [2022-12-14 10:05:27,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-12-14 10:05:27,623 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:05:27,623 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:05:27,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-12-14 10:05:27,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:05:27,824 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 10:05:27,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:05:27,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1982891507, now seen corresponding path program 40 times [2022-12-14 10:05:27,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:05:27,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473022796] [2022-12-14 10:05:27,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:05:27,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:05:27,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:05:29,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 42 proven. 1240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:05:29,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:05:29,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473022796] [2022-12-14 10:05:29,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473022796] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:05:29,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073530256] [2022-12-14 10:05:29,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:05:29,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:05:29,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:05:29,635 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:05:29,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-12-14 10:05:29,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:05:29,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 230 conjunts are in the unsatisfiable core [2022-12-14 10:05:29,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:05:30,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:05:30,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 10:05:30,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 42 proven. 1240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:05:30,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:05:30,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-14 10:05:30,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:05:30,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 42 proven. 1240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:05:30,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073530256] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:05:30,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2116247358] [2022-12-14 10:05:30,936 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 10:05:30,936 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:05:30,936 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:05:30,937 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:05:30,937 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:05:30,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:05:30,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:05:30,983 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 [2022-12-14 10:05:31,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:05:31,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:05:31,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:05:31,079 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:05:31,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:05:31,345 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:05:34,384 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '925557#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 10:05:34,385 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:05:34,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:05:34,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 80 [2022-12-14 10:05:34,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60766687] [2022-12-14 10:05:34,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:05:34,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-12-14 10:05:34,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:05:34,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-12-14 10:05:34,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=8089, Unknown=0, NotChecked=0, Total=8372 [2022-12-14 10:05:34,386 INFO L87 Difference]: Start difference. First operand 17612 states and 21384 transitions. Second operand has 80 states, 80 states have (on average 2.3625) internal successors, (189), 80 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:05:42,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:05:42,648 INFO L93 Difference]: Finished difference Result 21713 states and 26080 transitions. [2022-12-14 10:05:42,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-12-14 10:05:42,649 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.3625) internal successors, (189), 80 states have internal predecessors, (189), 0 states have call successors, (0), 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 133 [2022-12-14 10:05:42,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:05:42,661 INFO L225 Difference]: With dead ends: 21713 [2022-12-14 10:05:42,661 INFO L226 Difference]: Without dead ends: 19777 [2022-12-14 10:05:42,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 354 SyntacticMatches, 3 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 7291 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1457, Invalid=31849, Unknown=0, NotChecked=0, Total=33306 [2022-12-14 10:05:42,663 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 1043 mSDsluCounter, 12835 mSDsCounter, 0 mSdLazyCounter, 13643 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1043 SdHoareTripleChecker+Valid, 13118 SdHoareTripleChecker+Invalid, 13672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 13643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:05:42,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1043 Valid, 13118 Invalid, 13672 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [29 Valid, 13643 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-12-14 10:05:42,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19777 states. [2022-12-14 10:05:42,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19777 to 19024. [2022-12-14 10:05:42,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19024 states, 19022 states have (on average 1.2153296183366629) internal successors, (23118), 19023 states have internal predecessors, (23118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:05:42,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19024 states to 19024 states and 23118 transitions. [2022-12-14 10:05:42,803 INFO L78 Accepts]: Start accepts. Automaton has 19024 states and 23118 transitions. Word has length 133 [2022-12-14 10:05:42,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:05:42,803 INFO L495 AbstractCegarLoop]: Abstraction has 19024 states and 23118 transitions. [2022-12-14 10:05:42,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.3625) internal successors, (189), 80 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:05:42,803 INFO L276 IsEmpty]: Start isEmpty. Operand 19024 states and 23118 transitions. [2022-12-14 10:05:42,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-12-14 10:05:42,809 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:05:42,809 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1] [2022-12-14 10:05:42,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-12-14 10:05:43,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:05:43,011 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 10:05:43,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:05:43,012 INFO L85 PathProgramCache]: Analyzing trace with hash 563947419, now seen corresponding path program 30 times [2022-12-14 10:05:43,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:05:43,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526823537] [2022-12-14 10:05:43,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:05:43,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:05:43,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:05:45,393 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 38 proven. 939 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:05:45,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:05:45,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526823537] [2022-12-14 10:05:45,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526823537] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:05:45,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930788175] [2022-12-14 10:05:45,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:05:45,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:05:45,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:05:45,394 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:05:45,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-12-14 10:05:45,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:05:45,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:05:45,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 886 conjuncts, 215 conjunts are in the unsatisfiable core [2022-12-14 10:05:45,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:05:46,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:05:46,712 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-12-14 10:05:46,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 33 [2022-12-14 10:05:49,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:05:49,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:05:49,707 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-12-14 10:05:49,707 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 6 case distinctions, treesize of input 32 treesize of output 21 [2022-12-14 10:05:49,713 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 32 proven. 945 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:05:49,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:05:50,547 INFO L321 Elim1Store]: treesize reduction 26, result has 60.6 percent of original size [2022-12-14 10:05:50,548 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 417 treesize of output 343 [2022-12-14 10:05:50,560 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:05:50,560 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 275 treesize of output 259 [2022-12-14 10:05:50,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:05:50,628 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 10:05:50,629 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 62 treesize of output 51 [2022-12-14 10:05:50,717 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:05:50,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 157 treesize of output 164 [2022-12-14 10:05:52,617 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 38 proven. 939 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:05:52,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930788175] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:05:52,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [379633804] [2022-12-14 10:05:52,618 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 10:05:52,618 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:05:52,618 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:05:52,618 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:05:52,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:05:52,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:05:52,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:05:52,660 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 11 treesize of output 7 [2022-12-14 10:05:52,687 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 [2022-12-14 10:05:52,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:05:52,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:05:52,782 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:05:52,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:05:53,083 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:05:57,006 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '967394#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 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_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:05:57,006 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:05:57,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:05:57,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 44, 44] total 113 [2022-12-14 10:05:57,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460115175] [2022-12-14 10:05:57,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:05:57,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-12-14 10:05:57,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:05:57,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-12-14 10:05:57,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=15379, Unknown=0, NotChecked=0, Total=15750 [2022-12-14 10:05:57,008 INFO L87 Difference]: Start difference. First operand 19024 states and 23118 transitions. Second operand has 114 states, 114 states have (on average 2.692982456140351) internal successors, (307), 113 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:06:19,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:06:19,427 INFO L93 Difference]: Finished difference Result 59977 states and 72773 transitions. [2022-12-14 10:06:19,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-12-14 10:06:19,428 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.692982456140351) internal successors, (307), 113 states have internal predecessors, (307), 0 states have call successors, (0), 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 133 [2022-12-14 10:06:19,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:06:19,448 INFO L225 Difference]: With dead ends: 59977 [2022-12-14 10:06:19,448 INFO L226 Difference]: Without dead ends: 30999 [2022-12-14 10:06:19,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14015 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=2359, Invalid=61397, Unknown=0, NotChecked=0, Total=63756 [2022-12-14 10:06:19,451 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 2767 mSDsluCounter, 14351 mSDsCounter, 0 mSdLazyCounter, 19339 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2767 SdHoareTripleChecker+Valid, 14557 SdHoareTripleChecker+Invalid, 19374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 19339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:06:19,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2767 Valid, 14557 Invalid, 19374 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [35 Valid, 19339 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2022-12-14 10:06:19,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30999 states. [2022-12-14 10:06:19,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30999 to 19159. [2022-12-14 10:06:19,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19159 states, 19157 states have (on average 1.2150649892989507) internal successors, (23277), 19158 states have internal predecessors, (23277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:06:19,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19159 states to 19159 states and 23277 transitions. [2022-12-14 10:06:19,677 INFO L78 Accepts]: Start accepts. Automaton has 19159 states and 23277 transitions. Word has length 133 [2022-12-14 10:06:19,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:06:19,677 INFO L495 AbstractCegarLoop]: Abstraction has 19159 states and 23277 transitions. [2022-12-14 10:06:19,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.692982456140351) internal successors, (307), 113 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:06:19,677 INFO L276 IsEmpty]: Start isEmpty. Operand 19159 states and 23277 transitions. [2022-12-14 10:06:19,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-12-14 10:06:19,682 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:06:19,682 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:06:19,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-12-14 10:06:19,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:06:19,883 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 10:06:19,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:06:19,884 INFO L85 PathProgramCache]: Analyzing trace with hash 250607761, now seen corresponding path program 41 times [2022-12-14 10:06:19,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:06:19,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142799268] [2022-12-14 10:06:19,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:06:19,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:06:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:06:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1323 backedges. 361 proven. 962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:06:21,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:06:21,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142799268] [2022-12-14 10:06:21,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142799268] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:06:21,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865088808] [2022-12-14 10:06:21,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:06:21,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:06:21,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:06:21,666 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:06:21,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-12-14 10:06:23,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-12-14 10:06:23,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:06:23,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 167 conjunts are in the unsatisfiable core [2022-12-14 10:06:23,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:06:25,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1323 backedges. 400 proven. 923 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:06:25,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:06:26,873 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 [2022-12-14 10:06:27,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1323 backedges. 400 proven. 923 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:06:27,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865088808] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:06:27,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [497203632] [2022-12-14 10:06:27,555 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 10:06:27,555 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:06:27,555 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:06:27,555 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:06:27,555 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:06:27,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:06:27,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:06:27,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:06:27,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:06:27,657 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 [2022-12-14 10:06:27,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:06:27,731 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:06:27,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:06:27,944 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:06:30,503 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1047722#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 10:06:30,503 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:06:30,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:06:30,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 121 [2022-12-14 10:06:30,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87635240] [2022-12-14 10:06:30,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:06:30,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-12-14 10:06:30,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:06:30,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-12-14 10:06:30,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2196, Invalid=15626, Unknown=0, NotChecked=0, Total=17822 [2022-12-14 10:06:30,505 INFO L87 Difference]: Start difference. First operand 19159 states and 23277 transitions. Second operand has 122 states, 121 states have (on average 2.9669421487603307) internal successors, (359), 122 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:06:35,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:06:35,378 INFO L93 Difference]: Finished difference Result 20663 states and 24791 transitions. [2022-12-14 10:06:35,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-12-14 10:06:35,378 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 121 states have (on average 2.9669421487603307) internal successors, (359), 122 states have internal predecessors, (359), 0 states have call successors, (0), 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 135 [2022-12-14 10:06:35,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:06:35,391 INFO L225 Difference]: With dead ends: 20663 [2022-12-14 10:06:35,391 INFO L226 Difference]: Without dead ends: 20663 [2022-12-14 10:06:35,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 297 SyntacticMatches, 22 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12915 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=6926, Invalid=33676, Unknown=0, NotChecked=0, Total=40602 [2022-12-14 10:06:35,393 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 1244 mSDsluCounter, 2874 mSDsCounter, 0 mSdLazyCounter, 3926 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1244 SdHoareTripleChecker+Valid, 3013 SdHoareTripleChecker+Invalid, 3928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:06:35,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1244 Valid, 3013 Invalid, 3928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3926 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 10:06:35,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20663 states. [2022-12-14 10:06:35,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20663 to 19287. [2022-12-14 10:06:35,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19287 states, 19285 states have (on average 1.2152450090744102) internal successors, (23436), 19286 states have internal predecessors, (23436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:06:35,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19287 states to 19287 states and 23436 transitions. [2022-12-14 10:06:35,557 INFO L78 Accepts]: Start accepts. Automaton has 19287 states and 23436 transitions. Word has length 135 [2022-12-14 10:06:35,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:06:35,557 INFO L495 AbstractCegarLoop]: Abstraction has 19287 states and 23436 transitions. [2022-12-14 10:06:35,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 121 states have (on average 2.9669421487603307) internal successors, (359), 122 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:06:35,558 INFO L276 IsEmpty]: Start isEmpty. Operand 19287 states and 23436 transitions. [2022-12-14 10:06:35,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-12-14 10:06:35,564 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:06:35,564 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2022-12-14 10:06:35,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-12-14 10:06:35,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2022-12-14 10:06:35,765 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 10:06:35,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:06:35,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1964291658, now seen corresponding path program 31 times [2022-12-14 10:06:35,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:06:35,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034797293] [2022-12-14 10:06:35,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:06:35,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:06:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:06:37,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 196 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:06:37,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:06:37,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034797293] [2022-12-14 10:06:37,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034797293] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:06:37,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072048275] [2022-12-14 10:06:37,151 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:06:37,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:06:37,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:06:37,152 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:06:37,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-12-14 10:06:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:06:37,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 162 conjunts are in the unsatisfiable core [2022-12-14 10:06:37,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:06:38,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 225 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:06:38,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:06:38,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 10:06:39,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 225 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:06:39,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072048275] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:06:39,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1699901768] [2022-12-14 10:06:39,154 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 10:06:39,154 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:06:39,154 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:06:39,154 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:06:39,154 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:06:39,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:06:39,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:06:39,193 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 11 treesize of output 7 [2022-12-14 10:06:39,219 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 [2022-12-14 10:06:39,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:06:39,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:06:39,315 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:06:39,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:06:39,608 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:06:41,621 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1088703#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 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_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:06:41,621 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:06:41,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:06:41,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 77 [2022-12-14 10:06:41,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784994550] [2022-12-14 10:06:41,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:06:41,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-12-14 10:06:41,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:06:41,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-12-14 10:06:41,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=757, Invalid=7433, Unknown=0, NotChecked=0, Total=8190 [2022-12-14 10:06:41,623 INFO L87 Difference]: Start difference. First operand 19287 states and 23436 transitions. Second operand has 79 states, 78 states have (on average 3.5128205128205128) internal successors, (274), 78 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:06:44,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:06:44,351 INFO L93 Difference]: Finished difference Result 31417 states and 38197 transitions. [2022-12-14 10:06:44,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-14 10:06:44,351 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 3.5128205128205128) internal successors, (274), 78 states have internal predecessors, (274), 0 states have call successors, (0), 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 135 [2022-12-14 10:06:44,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:06:44,372 INFO L225 Difference]: With dead ends: 31417 [2022-12-14 10:06:44,372 INFO L226 Difference]: Without dead ends: 31417 [2022-12-14 10:06:44,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 334 SyntacticMatches, 17 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4912 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2553, Invalid=13449, Unknown=0, NotChecked=0, Total=16002 [2022-12-14 10:06:44,373 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 1039 mSDsluCounter, 3190 mSDsCounter, 0 mSdLazyCounter, 5262 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1039 SdHoareTripleChecker+Valid, 3291 SdHoareTripleChecker+Invalid, 5262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:06:44,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1039 Valid, 3291 Invalid, 5262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5262 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 10:06:44,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31417 states. [2022-12-14 10:06:44,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31417 to 20345. [2022-12-14 10:06:44,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20345 states, 20343 states have (on average 1.2155041046060069) internal successors, (24727), 20344 states have internal predecessors, (24727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:06:44,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20345 states to 20345 states and 24727 transitions. [2022-12-14 10:06:44,579 INFO L78 Accepts]: Start accepts. Automaton has 20345 states and 24727 transitions. Word has length 135 [2022-12-14 10:06:44,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:06:44,579 INFO L495 AbstractCegarLoop]: Abstraction has 20345 states and 24727 transitions. [2022-12-14 10:06:44,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 3.5128205128205128) internal successors, (274), 78 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:06:44,579 INFO L276 IsEmpty]: Start isEmpty. Operand 20345 states and 24727 transitions. [2022-12-14 10:06:44,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-12-14 10:06:44,601 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:06:44,601 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:06:44,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-12-14 10:06:44,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:06:44,802 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 10:06:44,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:06:44,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1344244714, now seen corresponding path program 42 times [2022-12-14 10:06:44,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:06:44,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342319657] [2022-12-14 10:06:44,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:06:44,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:06:44,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:06:46,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 44 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:06:46,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:06:46,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342319657] [2022-12-14 10:06:46,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342319657] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:06:46,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854216974] [2022-12-14 10:06:46,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:06:46,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:06:46,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:06:46,704 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:06:46,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-12-14 10:06:47,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:06:47,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:06:47,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 238 conjunts are in the unsatisfiable core [2022-12-14 10:06:47,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:06:48,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:06:48,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 10:06:48,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 44 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:06:48,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:06:48,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-14 10:06:48,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:06:49,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 44 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:06:49,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854216974] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:06:49,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1070762858] [2022-12-14 10:06:49,122 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 10:06:49,122 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:06:49,122 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:06:49,122 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:06:49,122 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:06:49,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:06:49,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:06:49,174 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 11 treesize of output 7 [2022-12-14 10:06:49,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:06:49,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:06:49,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:06:49,298 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:06:49,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:06:49,506 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:06:52,002 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1141460#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 10:06:52,002 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:06:52,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:06:52,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 83 [2022-12-14 10:06:52,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865697958] [2022-12-14 10:06:52,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:06:52,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-12-14 10:06:52,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:06:52,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-12-14 10:06:52,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=8639, Unknown=0, NotChecked=0, Total=8930 [2022-12-14 10:06:52,004 INFO L87 Difference]: Start difference. First operand 20345 states and 24727 transitions. Second operand has 83 states, 83 states have (on average 2.3734939759036147) internal successors, (197), 83 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:00,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:07:00,466 INFO L93 Difference]: Finished difference Result 24909 states and 29958 transitions. [2022-12-14 10:07:00,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-12-14 10:07:00,467 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.3734939759036147) internal successors, (197), 83 states have internal predecessors, (197), 0 states have call successors, (0), 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 139 [2022-12-14 10:07:00,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:07:00,482 INFO L225 Difference]: With dead ends: 24909 [2022-12-14 10:07:00,483 INFO L226 Difference]: Without dead ends: 22747 [2022-12-14 10:07:00,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 371 SyntacticMatches, 3 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 7852 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=1515, Invalid=34395, Unknown=0, NotChecked=0, Total=35910 [2022-12-14 10:07:00,484 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 1200 mSDsluCounter, 15744 mSDsCounter, 0 mSdLazyCounter, 16593 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1200 SdHoareTripleChecker+Valid, 16041 SdHoareTripleChecker+Invalid, 16623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 16593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:07:00,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1200 Valid, 16041 Invalid, 16623 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [30 Valid, 16593 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-12-14 10:07:00,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22747 states. [2022-12-14 10:07:00,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22747 to 21913. [2022-12-14 10:07:00,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21913 states, 21911 states have (on average 1.2164666149422665) internal successors, (26654), 21912 states have internal predecessors, (26654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:00,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21913 states to 21913 states and 26654 transitions. [2022-12-14 10:07:00,649 INFO L78 Accepts]: Start accepts. Automaton has 21913 states and 26654 transitions. Word has length 139 [2022-12-14 10:07:00,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:07:00,649 INFO L495 AbstractCegarLoop]: Abstraction has 21913 states and 26654 transitions. [2022-12-14 10:07:00,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.3734939759036147) internal successors, (197), 83 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:00,649 INFO L276 IsEmpty]: Start isEmpty. Operand 21913 states and 26654 transitions. [2022-12-14 10:07:00,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-12-14 10:07:00,656 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:07:00,656 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:07:00,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-12-14 10:07:00,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:07:00,857 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 10:07:00,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:07:00,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1445267404, now seen corresponding path program 43 times [2022-12-14 10:07:00,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:07:00,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897857074] [2022-12-14 10:07:00,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:00,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:07:00,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:03,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 400 proven. 1052 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:03,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:07:03,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897857074] [2022-12-14 10:07:03,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897857074] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:07:03,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200719074] [2022-12-14 10:07:03,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:07:03,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:07:03,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:07:03,070 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:07:03,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-12-14 10:07:03,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:03,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 216 conjunts are in the unsatisfiable core [2022-12-14 10:07:03,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:04,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 441 proven. 1011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:04,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:05,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 10:07:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 441 proven. 1011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:06,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200719074] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:06,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [587490991] [2022-12-14 10:07:06,617 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 10:07:06,617 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:07:06,617 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:07:06,617 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:07:06,617 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:07:06,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:07:06,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:07:06,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:07:06,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:07:06,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:07:06,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:07:06,763 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:07:06,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:07:06,957 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:07:09,648 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1189428#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 10:07:09,648 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:07:09,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:07:09,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 103 [2022-12-14 10:07:09,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948885925] [2022-12-14 10:07:09,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:07:09,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-12-14 10:07:09,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:07:09,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-12-14 10:07:09,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1302, Invalid=12038, Unknown=0, NotChecked=0, Total=13340 [2022-12-14 10:07:09,650 INFO L87 Difference]: Start difference. First operand 21913 states and 26654 transitions. Second operand has 104 states, 103 states have (on average 2.7864077669902914) internal successors, (287), 104 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:15,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:07:15,447 INFO L93 Difference]: Finished difference Result 23530 states and 28281 transitions. [2022-12-14 10:07:15,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-12-14 10:07:15,447 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 103 states have (on average 2.7864077669902914) internal successors, (287), 104 states have internal predecessors, (287), 0 states have call successors, (0), 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 141 [2022-12-14 10:07:15,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:07:15,461 INFO L225 Difference]: With dead ends: 23530 [2022-12-14 10:07:15,461 INFO L226 Difference]: Without dead ends: 23530 [2022-12-14 10:07:15,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 334 SyntacticMatches, 23 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9889 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=5830, Invalid=28952, Unknown=0, NotChecked=0, Total=34782 [2022-12-14 10:07:15,463 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 1358 mSDsluCounter, 5296 mSDsCounter, 0 mSdLazyCounter, 8154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1358 SdHoareTripleChecker+Valid, 5446 SdHoareTripleChecker+Invalid, 8156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:07:15,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1358 Valid, 5446 Invalid, 8156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8154 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-14 10:07:15,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23530 states. [2022-12-14 10:07:15,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23530 to 22045. [2022-12-14 10:07:15,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22045 states, 22043 states have (on average 1.2166220568888082) internal successors, (26818), 22044 states have internal predecessors, (26818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:15,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22045 states to 22045 states and 26818 transitions. [2022-12-14 10:07:15,654 INFO L78 Accepts]: Start accepts. Automaton has 22045 states and 26818 transitions. Word has length 141 [2022-12-14 10:07:15,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:07:15,654 INFO L495 AbstractCegarLoop]: Abstraction has 22045 states and 26818 transitions. [2022-12-14 10:07:15,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 103 states have (on average 2.7864077669902914) internal successors, (287), 104 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:15,654 INFO L276 IsEmpty]: Start isEmpty. Operand 22045 states and 26818 transitions. [2022-12-14 10:07:15,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-12-14 10:07:15,661 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:07:15,661 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2022-12-14 10:07:15,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-12-14 10:07:15,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:07:15,862 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 10:07:15,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:07:15,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1987693141, now seen corresponding path program 32 times [2022-12-14 10:07:15,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:07:15,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240329329] [2022-12-14 10:07:15,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:15,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:07:15,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 34 proven. 1072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:17,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:07:17,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240329329] [2022-12-14 10:07:17,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240329329] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:07:17,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858240111] [2022-12-14 10:07:17,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:07:17,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:07:17,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:07:17,832 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:07:17,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-12-14 10:07:18,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-12-14 10:07:18,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:07:18,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 936 conjuncts, 197 conjunts are in the unsatisfiable core [2022-12-14 10:07:18,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:19,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 10:07:19,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:07:19,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 10:07:19,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 10:07:19,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 34 proven. 1072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:19,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:19,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 treesize of output 13 [2022-12-14 10:07:19,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:07:19,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 34 proven. 1072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:19,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858240111] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:19,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [938725916] [2022-12-14 10:07:19,616 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 10:07:19,617 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:07:19,617 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:07:19,617 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:07:19,617 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:07:19,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:07:19,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:07:19,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:07:19,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:07:19,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:07:19,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:07:19,770 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:07:19,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:07:20,074 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:07:22,863 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1236043#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 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_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:07:22,863 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:07:22,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:07:22,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 45 [2022-12-14 10:07:22,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823111011] [2022-12-14 10:07:22,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:07:22,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-14 10:07:22,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:07:22,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-14 10:07:22,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=3158, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 10:07:22,864 INFO L87 Difference]: Start difference. First operand 22045 states and 26818 transitions. Second operand has 46 states, 46 states have (on average 3.217391304347826) internal successors, (148), 45 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:27,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:07:27,266 INFO L93 Difference]: Finished difference Result 53276 states and 64634 transitions. [2022-12-14 10:07:27,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-12-14 10:07:27,266 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.217391304347826) internal successors, (148), 45 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2022-12-14 10:07:27,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:07:27,292 INFO L225 Difference]: With dead ends: 53276 [2022-12-14 10:07:27,292 INFO L226 Difference]: Without dead ends: 35280 [2022-12-14 10:07:27,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 402 SyntacticMatches, 5 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3268 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=692, Invalid=15564, Unknown=0, NotChecked=0, Total=16256 [2022-12-14 10:07:27,293 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 834 mSDsluCounter, 8014 mSDsCounter, 0 mSdLazyCounter, 9507 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 8242 SdHoareTripleChecker+Invalid, 9526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 9507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:07:27,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [834 Valid, 8242 Invalid, 9526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 9507 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-12-14 10:07:27,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35280 states. [2022-12-14 10:07:27,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35280 to 22190. [2022-12-14 10:07:27,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22190 states, 22188 states have (on average 1.2163782224625923) internal successors, (26989), 22189 states have internal predecessors, (26989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:27,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22190 states to 22190 states and 26989 transitions. [2022-12-14 10:07:27,533 INFO L78 Accepts]: Start accepts. Automaton has 22190 states and 26989 transitions. Word has length 141 [2022-12-14 10:07:27,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:07:27,533 INFO L495 AbstractCegarLoop]: Abstraction has 22190 states and 26989 transitions. [2022-12-14 10:07:27,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.217391304347826) internal successors, (148), 45 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:27,533 INFO L276 IsEmpty]: Start isEmpty. Operand 22190 states and 26989 transitions. [2022-12-14 10:07:27,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 10:07:27,540 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:07:27,540 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2022-12-14 10:07:27,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-12-14 10:07:27,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:07:27,741 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 10:07:27,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:07:27,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1286915580, now seen corresponding path program 33 times [2022-12-14 10:07:27,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:07:27,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664037510] [2022-12-14 10:07:27,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:27,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:07:27,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:29,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 225 proven. 914 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:29,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:07:29,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664037510] [2022-12-14 10:07:29,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664037510] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:07:29,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776807507] [2022-12-14 10:07:29,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:07:29,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:07:29,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:07:29,182 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:07:29,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-12-14 10:07:29,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:07:29,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:07:29,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 176 conjunts are in the unsatisfiable core [2022-12-14 10:07:29,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:30,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 256 proven. 883 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:30,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:31,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-12-14 10:07:32,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 256 proven. 883 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:32,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776807507] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:32,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [588530755] [2022-12-14 10:07:32,377 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 10:07:32,377 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:07:32,377 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:07:32,377 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:07:32,377 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:07:32,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:07:32,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:07:32,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:07:32,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:07:32,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:07:32,481 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 [2022-12-14 10:07:32,512 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:07:32,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:07:32,822 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:07:35,734 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1312612#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 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_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:07:35,734 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:07:35,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:07:35,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 97 [2022-12-14 10:07:35,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298528196] [2022-12-14 10:07:35,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:07:35,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-12-14 10:07:35,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:07:35,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-12-14 10:07:35,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1332, Invalid=10878, Unknown=0, NotChecked=0, Total=12210 [2022-12-14 10:07:35,736 INFO L87 Difference]: Start difference. First operand 22190 states and 26989 transitions. Second operand has 99 states, 98 states have (on average 3.336734693877551) internal successors, (327), 98 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:39,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:07:39,388 INFO L93 Difference]: Finished difference Result 36432 states and 44348 transitions. [2022-12-14 10:07:39,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-12-14 10:07:39,388 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 98 states have (on average 3.336734693877551) internal successors, (327), 98 states have internal predecessors, (327), 0 states have call successors, (0), 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 143 [2022-12-14 10:07:39,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:07:39,414 INFO L225 Difference]: With dead ends: 36432 [2022-12-14 10:07:39,414 INFO L226 Difference]: Without dead ends: 36432 [2022-12-14 10:07:39,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5782 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=4003, Invalid=18049, Unknown=0, NotChecked=0, Total=22052 [2022-12-14 10:07:39,416 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 1494 mSDsluCounter, 3678 mSDsCounter, 0 mSdLazyCounter, 6050 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1494 SdHoareTripleChecker+Valid, 3785 SdHoareTripleChecker+Invalid, 6050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:07:39,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1494 Valid, 3785 Invalid, 6050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6050 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 10:07:39,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36432 states. [2022-12-14 10:07:39,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36432 to 23342. [2022-12-14 10:07:39,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23342 states, 23340 states have (on average 1.21662382176521) internal successors, (28396), 23341 states have internal predecessors, (28396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:39,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23342 states to 23342 states and 28396 transitions. [2022-12-14 10:07:39,647 INFO L78 Accepts]: Start accepts. Automaton has 23342 states and 28396 transitions. Word has length 143 [2022-12-14 10:07:39,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:07:39,647 INFO L495 AbstractCegarLoop]: Abstraction has 23342 states and 28396 transitions. [2022-12-14 10:07:39,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 98 states have (on average 3.336734693877551) internal successors, (327), 98 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:39,647 INFO L276 IsEmpty]: Start isEmpty. Operand 23342 states and 28396 transitions. [2022-12-14 10:07:39,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 10:07:39,654 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:07:39,655 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:07:39,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-12-14 10:07:39,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:07:39,856 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 10:07:39,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:07:39,857 INFO L85 PathProgramCache]: Analyzing trace with hash -668145095, now seen corresponding path program 44 times [2022-12-14 10:07:39,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:07:39,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666893884] [2022-12-14 10:07:39,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:39,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:07:39,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:42,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 46 proven. 1496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:42,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:07:42,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666893884] [2022-12-14 10:07:42,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666893884] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:07:42,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566847720] [2022-12-14 10:07:42,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:07:42,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:07:42,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:07:42,101 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:07:42,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a0ed55-6a9b-466b-b757-dc9f83dcbd2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-12-14 10:07:44,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-12-14 10:07:44,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:07:44,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 283 conjunts are in the unsatisfiable core [2022-12-14 10:07:44,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:44,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 10:07:45,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:07:45,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:07:51,009 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 10:07:51,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 13 [2022-12-14 10:07:51,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 46 proven. 1496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:51,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:53,266 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1|) 0) (+ |ULTIMATE.start_main_~nondetString2~0#1.offset| 22)) 0)) is different from false [2022-12-14 10:07:53,273 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:07:53,273 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-12-14 10:07:53,277 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:07:53,278 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 27 treesize of output 31 [2022-12-14 10:07:53,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:07:53,290 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:07:53,290 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 34 treesize of output 37 [2022-12-14 10:07:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 46 proven. 1496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:55,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566847720] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:55,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [896286379] [2022-12-14 10:07:55,539 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 10:07:55,539 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:07:55,539 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:07:55,539 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:07:55,539 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:07:55,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:07:55,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:07:55,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:07:55,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:07:55,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:07:55,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:07:55,697 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:07:55,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:07:55,901 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:08:00,181 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1373474#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 10:08:00,181 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:08:00,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:08:00,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 55, 54] total 136 [2022-12-14 10:08:00,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770830165] [2022-12-14 10:08:00,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:08:00,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-12-14 10:08:00,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:08:00,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-12-14 10:08:00,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=21018, Unknown=1, NotChecked=290, Total=21756 [2022-12-14 10:08:00,183 INFO L87 Difference]: Start difference. First operand 23342 states and 28396 transitions. Second operand has 136 states, 136 states have (on average 2.4926470588235294) internal successors, (339), 136 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)