./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-memory-alloca/cstrcmp-alloca-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-memory-alloca/cstrcmp-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 1f7000ceab0d3c085565adc32b7b32d00b21649ab807e7531fb2c94cf231de29 --- 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-8393723 [2022-11-19 08:25:04,064 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:25:04,070 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:25:04,103 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:25:04,106 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:25:04,110 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:25:04,112 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:25:04,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:25:04,116 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:25:04,117 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:25:04,118 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:25:04,119 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:25:04,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:25:04,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:25:04,122 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:25:04,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:25:04,124 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:25:04,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:25:04,127 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:25:04,129 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:25:04,130 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:25:04,131 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:25:04,133 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:25:04,134 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:25:04,137 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:25:04,138 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:25:04,138 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:25:04,139 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:25:04,140 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:25:04,141 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:25:04,141 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:25:04,142 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:25:04,143 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:25:04,144 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:25:04,145 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:25:04,146 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:25:04,147 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:25:04,147 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:25:04,148 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:25:04,149 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:25:04,149 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:25:04,150 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2022-11-19 08:25:04,172 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:25:04,172 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:25:04,173 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:25:04,173 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:25:04,174 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:25:04,174 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:25:04,175 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:25:04,175 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:25:04,175 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:25:04,176 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:25:04,176 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:25:04,176 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:25:04,176 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:25:04,177 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:25:04,177 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:25:04,177 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:25:04,177 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:25:04,178 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:25:04,179 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 08:25:04,179 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 08:25:04,179 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:25:04,179 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 08:25:04,180 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:25:04,180 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:25:04,180 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 08:25:04,181 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 08:25:04,181 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 08:25:04,181 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:25:04,181 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 08:25:04,182 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:25:04,182 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:25:04,182 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:25:04,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:25:04,183 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:25:04,183 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:25:04,183 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:25:04,184 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:25:04,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:25:04,184 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:25:04,184 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_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1f7000ceab0d3c085565adc32b7b32d00b21649ab807e7531fb2c94cf231de29 [2022-11-19 08:25:04,476 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:25:04,516 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:25:04,519 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:25:04,520 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:25:04,521 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:25:04,522 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/termination-memory-alloca/cstrcmp-alloca-1.i [2022-11-19 08:25:04,597 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/data/e150459b8/59c65682275e4ebba33a351a998143c4/FLAG548b40467 [2022-11-19 08:25:05,162 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:25:05,166 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/sv-benchmarks/c/termination-memory-alloca/cstrcmp-alloca-1.i [2022-11-19 08:25:05,193 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/data/e150459b8/59c65682275e4ebba33a351a998143c4/FLAG548b40467 [2022-11-19 08:25:05,437 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/data/e150459b8/59c65682275e4ebba33a351a998143c4 [2022-11-19 08:25:05,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:25:05,441 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:25:05,443 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:25:05,444 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:25:05,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:25:05,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:25:05" (1/1) ... [2022-11-19 08:25:05,457 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@489fd401 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:05, skipping insertion in model container [2022-11-19 08:25:05,457 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:25:05" (1/1) ... [2022-11-19 08:25:05,467 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:25:05,498 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:25:05,880 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:25:05,892 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:25:05,946 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:25:05,985 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:25:05,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:05 WrapperNode [2022-11-19 08:25:05,986 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:25:05,987 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:25:05,987 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:25:05,988 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:25:05,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:05" (1/1) ... [2022-11-19 08:25:06,008 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:05" (1/1) ... [2022-11-19 08:25:06,029 INFO L138 Inliner]: procedures = 111, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2022-11-19 08:25:06,029 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:25:06,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:25:06,030 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:25:06,031 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:25:06,040 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:05" (1/1) ... [2022-11-19 08:25:06,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:05" (1/1) ... [2022-11-19 08:25:06,043 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:05" (1/1) ... [2022-11-19 08:25:06,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:05" (1/1) ... [2022-11-19 08:25:06,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:05" (1/1) ... [2022-11-19 08:25:06,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:05" (1/1) ... [2022-11-19 08:25:06,054 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:05" (1/1) ... [2022-11-19 08:25:06,055 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:05" (1/1) ... [2022-11-19 08:25:06,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:25:06,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:25:06,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:25:06,059 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:25:06,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:05" (1/1) ... [2022-11-19 08:25:06,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:25:06,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:25:06,097 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:25:06,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:25:06,152 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 08:25:06,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 08:25:06,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 08:25:06,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 08:25:06,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:25:06,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:25:06,261 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:25:06,263 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:25:06,637 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:25:06,701 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:25:06,701 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 08:25:06,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:25:06 BoogieIcfgContainer [2022-11-19 08:25:06,704 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:25:06,706 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:25:06,706 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:25:06,711 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:25:06,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:25:05" (1/3) ... [2022-11-19 08:25:06,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e2ce4be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:25:06, skipping insertion in model container [2022-11-19 08:25:06,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:05" (2/3) ... [2022-11-19 08:25:06,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e2ce4be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:25:06, skipping insertion in model container [2022-11-19 08:25:06,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:25:06" (3/3) ... [2022-11-19 08:25:06,714 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrcmp-alloca-1.i [2022-11-19 08:25:06,734 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:25:06,734 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-11-19 08:25:06,800 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:25:06,817 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;@4d0f8284, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:25:06,817 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2022-11-19 08:25:06,822 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 26 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) [2022-11-19 08:25:06,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 08:25:06,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:06,830 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 08:25:06,831 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-19 08:25:06,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:06,837 INFO L85 PathProgramCache]: Analyzing trace with hash 3396, now seen corresponding path program 1 times [2022-11-19 08:25:06,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:06,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824039418] [2022-11-19 08:25:06,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:06,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:06,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:07,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:07,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:25:07,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824039418] [2022-11-19 08:25:07,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824039418] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:25:07,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:25:07,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:25:07,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160627528] [2022-11-19 08:25:07,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:25:07,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:25:07,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:25:07,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:25:07,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:25:07,233 INFO L87 Difference]: Start difference. First operand has 27 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 26 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) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:07,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:25:07,322 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2022-11-19 08:25:07,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:25:07,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-19 08:25:07,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:25:07,333 INFO L225 Difference]: With dead ends: 26 [2022-11-19 08:25:07,333 INFO L226 Difference]: Without dead ends: 25 [2022-11-19 08:25:07,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:25:07,340 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:25:07,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 11 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:25:07,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-19 08:25:07,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-19 08:25:07,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:07,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-11-19 08:25:07,376 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 2 [2022-11-19 08:25:07,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:25:07,377 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-11-19 08:25:07,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:07,378 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-11-19 08:25:07,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 08:25:07,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:07,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 08:25:07,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:25:07,381 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-19 08:25:07,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:07,382 INFO L85 PathProgramCache]: Analyzing trace with hash 3397, now seen corresponding path program 1 times [2022-11-19 08:25:07,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:07,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329300600] [2022-11-19 08:25:07,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:07,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:07,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:07,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:07,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:25:07,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329300600] [2022-11-19 08:25:07,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329300600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:25:07,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:25:07,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:25:07,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394683772] [2022-11-19 08:25:07,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:25:07,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:25:07,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:25:07,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:25:07,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:25:07,757 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:07,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:25:07,792 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2022-11-19 08:25:07,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:25:07,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-19 08:25:07,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:25:07,793 INFO L225 Difference]: With dead ends: 24 [2022-11-19 08:25:07,793 INFO L226 Difference]: Without dead ends: 24 [2022-11-19 08:25:07,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:25:07,795 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:25:07,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 11 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:25:07,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-19 08:25:07,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-19 08:25:07,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 11 states have (on average 2.272727272727273) internal successors, (25), 23 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) [2022-11-19 08:25:07,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-11-19 08:25:07,800 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 2 [2022-11-19 08:25:07,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:25:07,800 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-11-19 08:25:07,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:07,801 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-11-19 08:25:07,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 08:25:07,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:07,801 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 08:25:07,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:25:07,802 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-19 08:25:07,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:07,803 INFO L85 PathProgramCache]: Analyzing trace with hash 105265, now seen corresponding path program 1 times [2022-11-19 08:25:07,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:07,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234396130] [2022-11-19 08:25:07,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:07,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:07,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:07,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:25:07,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234396130] [2022-11-19 08:25:07,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234396130] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:25:07,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:25:07,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:25:07,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755844335] [2022-11-19 08:25:07,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:25:07,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:25:07,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:25:07,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:25:07,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:25:07,921 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:07,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:25:07,966 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2022-11-19 08:25:07,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:25:07,967 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 08:25:07,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:25:07,968 INFO L225 Difference]: With dead ends: 23 [2022-11-19 08:25:07,968 INFO L226 Difference]: Without dead ends: 23 [2022-11-19 08:25:07,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:25:07,971 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:25:07,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 10 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:25:07,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-19 08:25:07,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-19 08:25:07,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 22 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) [2022-11-19 08:25:07,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-11-19 08:25:07,977 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 3 [2022-11-19 08:25:07,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:25:07,978 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-11-19 08:25:07,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:07,978 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-11-19 08:25:07,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 08:25:07,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:07,979 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 08:25:07,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:25:07,980 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-19 08:25:07,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:07,983 INFO L85 PathProgramCache]: Analyzing trace with hash 105266, now seen corresponding path program 1 times [2022-11-19 08:25:07,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:07,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908850975] [2022-11-19 08:25:07,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:07,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:08,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:08,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:08,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:25:08,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908850975] [2022-11-19 08:25:08,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908850975] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:25:08,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:25:08,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:25:08,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497965529] [2022-11-19 08:25:08,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:25:08,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:25:08,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:25:08,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:25:08,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:25:08,231 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:08,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:25:08,282 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-11-19 08:25:08,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:25:08,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 08:25:08,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:25:08,284 INFO L225 Difference]: With dead ends: 22 [2022-11-19 08:25:08,284 INFO L226 Difference]: Without dead ends: 22 [2022-11-19 08:25:08,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:25:08,285 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:25:08,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 10 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:25:08,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-19 08:25:08,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-19 08:25:08,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 11 states have (on average 2.090909090909091) internal successors, (23), 21 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) [2022-11-19 08:25:08,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-11-19 08:25:08,289 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 3 [2022-11-19 08:25:08,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:25:08,290 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-11-19 08:25:08,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:08,290 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-11-19 08:25:08,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 08:25:08,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:08,291 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 08:25:08,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:25:08,291 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-19 08:25:08,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:08,298 INFO L85 PathProgramCache]: Analyzing trace with hash 3264731, now seen corresponding path program 1 times [2022-11-19 08:25:08,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:08,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62299447] [2022-11-19 08:25:08,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:08,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:08,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:08,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:08,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:25:08,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62299447] [2022-11-19 08:25:08,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62299447] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:25:08,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:25:08,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:25:08,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783103500] [2022-11-19 08:25:08,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:25:08,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:25:08,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:25:08,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:25:08,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:25:08,393 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:08,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:25:08,455 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-11-19 08:25:08,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:25:08,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-19 08:25:08,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:25:08,456 INFO L225 Difference]: With dead ends: 19 [2022-11-19 08:25:08,457 INFO L226 Difference]: Without dead ends: 19 [2022-11-19 08:25:08,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:25:08,458 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:25:08,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 6 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:25:08,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-19 08:25:08,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-19 08:25:08,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:08,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-11-19 08:25:08,462 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 4 [2022-11-19 08:25:08,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:25:08,462 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-11-19 08:25:08,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:08,463 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-11-19 08:25:08,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 08:25:08,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:08,464 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 08:25:08,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:25:08,464 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-19 08:25:08,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:08,465 INFO L85 PathProgramCache]: Analyzing trace with hash 3264732, now seen corresponding path program 1 times [2022-11-19 08:25:08,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:08,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834569416] [2022-11-19 08:25:08,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:08,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:08,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:08,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:25:08,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834569416] [2022-11-19 08:25:08,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834569416] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:25:08,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:25:08,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:25:08,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392337459] [2022-11-19 08:25:08,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:25:08,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:25:08,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:25:08,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:25:08,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:25:08,564 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:08,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:25:08,622 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2022-11-19 08:25:08,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:25:08,623 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-19 08:25:08,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:25:08,624 INFO L225 Difference]: With dead ends: 32 [2022-11-19 08:25:08,624 INFO L226 Difference]: Without dead ends: 32 [2022-11-19 08:25:08,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:25:08,625 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 46 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:25:08,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 12 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:25:08,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-19 08:25:08,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2022-11-19 08:25:08,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 24 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) [2022-11-19 08:25:08,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-11-19 08:25:08,630 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 4 [2022-11-19 08:25:08,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:25:08,630 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-11-19 08:25:08,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:08,630 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-11-19 08:25:08,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 08:25:08,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:08,631 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:25:08,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 08:25:08,632 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-19 08:25:08,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:08,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1523362560, now seen corresponding path program 1 times [2022-11-19 08:25:08,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:08,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662706098] [2022-11-19 08:25:08,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:08,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:08,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:08,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:08,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:25:08,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662706098] [2022-11-19 08:25:08,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662706098] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:25:08,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:25:08,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:25:08,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438204621] [2022-11-19 08:25:08,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:25:08,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:25:08,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:25:08,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:25:08,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:25:08,682 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:08,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:25:08,709 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2022-11-19 08:25:08,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:25:08,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 08:25:08,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:25:08,711 INFO L225 Difference]: With dead ends: 23 [2022-11-19 08:25:08,711 INFO L226 Difference]: Without dead ends: 23 [2022-11-19 08:25:08,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:25:08,712 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:25:08,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 8 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:25:08,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-19 08:25:08,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-19 08:25:08,720 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) [2022-11-19 08:25:08,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-11-19 08:25:08,721 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 7 [2022-11-19 08:25:08,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:25:08,721 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-11-19 08:25:08,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:08,722 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-11-19 08:25:08,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 08:25:08,722 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:08,723 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:25:08,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 08:25:08,723 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-19 08:25:08,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:08,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1523362559, now seen corresponding path program 1 times [2022-11-19 08:25:08,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:08,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280792536] [2022-11-19 08:25:08,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:08,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:08,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:08,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:25:08,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280792536] [2022-11-19 08:25:08,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280792536] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:25:08,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:25:08,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:25:08,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593554446] [2022-11-19 08:25:08,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:25:08,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:25:08,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:25:08,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:25:08,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:25:08,926 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:08,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:25:08,987 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-11-19 08:25:08,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:25:08,987 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 08:25:08,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:25:08,991 INFO L225 Difference]: With dead ends: 26 [2022-11-19 08:25:08,992 INFO L226 Difference]: Without dead ends: 26 [2022-11-19 08:25:08,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:25:08,998 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 14 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 [2022-11-19 08:25:08,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 14 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:25:09,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-19 08:25:09,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-11-19 08:25:09,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.5) internal successors, (27), 23 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) [2022-11-19 08:25:09,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-11-19 08:25:09,010 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 7 [2022-11-19 08:25:09,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:25:09,011 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-11-19 08:25:09,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:09,012 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-11-19 08:25:09,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 08:25:09,013 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:09,013 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:25:09,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 08:25:09,013 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-19 08:25:09,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:09,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1523353486, now seen corresponding path program 1 times [2022-11-19 08:25:09,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:09,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462749961] [2022-11-19 08:25:09,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:09,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:09,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:09,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:09,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:25:09,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462749961] [2022-11-19 08:25:09,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462749961] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:25:09,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:25:09,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:25:09,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523083055] [2022-11-19 08:25:09,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:25:09,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:25:09,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:25:09,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:25:09,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:25:09,060 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:09,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:25:09,101 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-11-19 08:25:09,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:25:09,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 08:25:09,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:25:09,103 INFO L225 Difference]: With dead ends: 26 [2022-11-19 08:25:09,103 INFO L226 Difference]: Without dead ends: 26 [2022-11-19 08:25:09,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:25:09,104 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:25:09,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:25:09,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-19 08:25:09,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-19 08:25:09,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.45) 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) [2022-11-19 08:25:09,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-11-19 08:25:09,108 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 7 [2022-11-19 08:25:09,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:25:09,109 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-11-19 08:25:09,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:09,109 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-11-19 08:25:09,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 08:25:09,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:09,110 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:25:09,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 08:25:09,111 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-19 08:25:09,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:09,111 INFO L85 PathProgramCache]: Analyzing trace with hash 632456201, now seen corresponding path program 1 times [2022-11-19 08:25:09,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:09,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883330290] [2022-11-19 08:25:09,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:09,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:09,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:09,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:25:09,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883330290] [2022-11-19 08:25:09,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883330290] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:25:09,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185968301] [2022-11-19 08:25:09,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:09,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:25:09,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:25:09,474 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:25:09,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:25:09,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:09,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-19 08:25:09,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:25:09,750 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 [2022-11-19 08:25:09,871 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-19 08:25:09,872 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 23 treesize of output 22 [2022-11-19 08:25:10,348 INFO L321 Elim1Store]: treesize reduction 42, result has 35.4 percent of original size [2022-11-19 08:25:10,348 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 56 treesize of output 46 [2022-11-19 08:25:10,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:10,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:25:10,833 INFO L321 Elim1Store]: treesize reduction 17, result has 54.1 percent of original size [2022-11-19 08:25:10,834 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 208 treesize of output 175 [2022-11-19 08:25:10,857 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:25:10,858 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 141 treesize of output 135 [2022-11-19 08:25:10,889 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 22 [2022-11-19 08:25:10,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:10,928 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:25:10,928 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 46 treesize of output 53 [2022-11-19 08:25:10,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:25:11,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:11,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185968301] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:25:11,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [932656335] [2022-11-19 08:25:11,061 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:25:11,061 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:25:11,067 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:25:11,072 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:25:11,073 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:25:11,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:11,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-19 08:25:11,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:25:11,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:11,258 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 [2022-11-19 08:25:11,774 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:25:13,287 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '570#(and (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|) (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.offset|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-19 08:25:13,288 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:25:13,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:25:13,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 21 [2022-11-19 08:25:13,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641189272] [2022-11-19 08:25:13,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:25:13,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-19 08:25:13,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:25:13,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-19 08:25:13,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-11-19 08:25:13,290 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 23 states, 22 states have (on average 1.2272727272727273) 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) [2022-11-19 08:25:13,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:25:13,659 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2022-11-19 08:25:13,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 08:25:13,660 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.2272727272727273) 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) Word has length 9 [2022-11-19 08:25:13,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:25:13,661 INFO L225 Difference]: With dead ends: 40 [2022-11-19 08:25:13,661 INFO L226 Difference]: Without dead ends: 40 [2022-11-19 08:25:13,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=169, Invalid=953, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 08:25:13,662 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 41 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:25:13,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 68 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 171 Invalid, 0 Unknown, 16 Unchecked, 0.2s Time] [2022-11-19 08:25:13,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-19 08:25:13,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 25. [2022-11-19 08:25:13,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:13,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-11-19 08:25:13,666 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 9 [2022-11-19 08:25:13,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:25:13,667 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-11-19 08:25:13,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.2272727272727273) 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) [2022-11-19 08:25:13,667 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-11-19 08:25:13,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 08:25:13,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:13,668 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:25:13,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:25:13,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 08:25:13,874 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-19 08:25:13,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:13,875 INFO L85 PathProgramCache]: Analyzing trace with hash 641132856, now seen corresponding path program 1 times [2022-11-19 08:25:13,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:13,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455550500] [2022-11-19 08:25:13,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:13,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:13,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:14,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:14,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:25:14,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455550500] [2022-11-19 08:25:14,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455550500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:25:14,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:25:14,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:25:14,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612469158] [2022-11-19 08:25:14,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:25:14,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:25:14,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:25:14,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:25:14,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:25:14,085 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:14,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:25:14,108 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-11-19 08:25:14,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:25:14,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 08:25:14,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:25:14,110 INFO L225 Difference]: With dead ends: 24 [2022-11-19 08:25:14,110 INFO L226 Difference]: Without dead ends: 20 [2022-11-19 08:25:14,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:25:14,111 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:25:14,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 14 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:25:14,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-19 08:25:14,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-19 08:25:14,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:14,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-11-19 08:25:14,114 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 9 [2022-11-19 08:25:14,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:25:14,114 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-11-19 08:25:14,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:14,115 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-11-19 08:25:14,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 08:25:14,115 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:14,115 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 08:25:14,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 08:25:14,116 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-19 08:25:14,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:14,116 INFO L85 PathProgramCache]: Analyzing trace with hash -517589324, now seen corresponding path program 1 times [2022-11-19 08:25:14,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:14,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016185059] [2022-11-19 08:25:14,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:14,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:14,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:14,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:14,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:25:14,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016185059] [2022-11-19 08:25:14,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016185059] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:25:14,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579865659] [2022-11-19 08:25:14,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:14,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:25:14,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:25:14,545 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:25:14,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:25:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:14,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-19 08:25:14,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:25:14,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:25:14,951 INFO L321 Elim1Store]: treesize reduction 3, result has 92.7 percent of original size [2022-11-19 08:25:14,952 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 48 treesize of output 58 [2022-11-19 08:25:15,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:15,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:25:15,420 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:25:15,421 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 91 treesize of output 91 [2022-11-19 08:25:15,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:25:15,461 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 32 treesize of output 30 [2022-11-19 08:25:15,479 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:25:15,479 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 49 treesize of output 49 [2022-11-19 08:25:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:15,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579865659] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:25:15,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1905133520] [2022-11-19 08:25:15,506 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:25:15,506 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:25:15,507 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:25:15,507 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:25:15,507 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:25:15,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:15,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-19 08:25:15,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:25:15,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:15,608 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 [2022-11-19 08:25:15,935 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:25:17,316 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '786#(and (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) |ULTIMATE.start_cstrcmp_#t~short5#1| (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ |ULTIMATE.start_cstrcmp_~s2#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.base|) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-19 08:25:17,317 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:25:17,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:25:17,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2022-11-19 08:25:17,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102097944] [2022-11-19 08:25:17,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:25:17,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 08:25:17,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:25:17,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 08:25:17,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2022-11-19 08:25:17,319 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:17,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:25:17,639 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2022-11-19 08:25:17,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 08:25:17,640 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 08:25:17,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:25:17,641 INFO L225 Difference]: With dead ends: 29 [2022-11-19 08:25:17,641 INFO L226 Difference]: Without dead ends: 24 [2022-11-19 08:25:17,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 08:25:17,642 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:25:17,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 33 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-19 08:25:17,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-19 08:25:17,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-11-19 08:25:17,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.15) internal successors, (23), 22 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) [2022-11-19 08:25:17,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2022-11-19 08:25:17,645 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 12 [2022-11-19 08:25:17,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:25:17,646 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2022-11-19 08:25:17,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:17,646 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2022-11-19 08:25:17,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 08:25:17,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:17,647 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-19 08:25:17,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:25:17,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 08:25:17,853 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-19 08:25:17,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:17,854 INFO L85 PathProgramCache]: Analyzing trace with hash 812893436, now seen corresponding path program 2 times [2022-11-19 08:25:17,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:17,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413206812] [2022-11-19 08:25:17,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:17,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:17,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:18,557 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:18,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:25:18,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413206812] [2022-11-19 08:25:18,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413206812] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:25:18,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261281652] [2022-11-19 08:25:18,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:25:18,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:25:18,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:25:18,563 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:25:18,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:25:18,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 08:25:18,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:25:18,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-19 08:25:18,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:25:18,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-19 08:25:18,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:25:18,775 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 [2022-11-19 08:25:19,051 INFO L321 Elim1Store]: treesize reduction 4, result has 85.2 percent of original size [2022-11-19 08:25:19,051 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 39 treesize of output 43 [2022-11-19 08:25:19,266 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:19,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:25:19,841 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:25:19,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 32 [2022-11-19 08:25:19,877 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:25:19,877 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 54 treesize of output 67 [2022-11-19 08:25:19,910 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:25:19,911 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 19 treesize of output 23 [2022-11-19 08:25:19,922 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 16 treesize of output 12 [2022-11-19 08:25:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:20,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261281652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:25:20,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [617295721] [2022-11-19 08:25:20,080 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:25:20,080 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:25:20,081 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:25:20,081 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:25:20,081 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:25:20,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:20,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-19 08:25:20,151 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 [2022-11-19 08:25:20,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:20,190 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 [2022-11-19 08:25:20,516 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:25:22,097 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '962#(and (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|) (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.offset|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-19 08:25:22,097 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:25:22,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:25:22,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 27 [2022-11-19 08:25:22,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619311056] [2022-11-19 08:25:22,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:25:22,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-19 08:25:22,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:25:22,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-19 08:25:22,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 08:25:22,100 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 29 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:22,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:25:22,887 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2022-11-19 08:25:22,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 08:25:22,888 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-19 08:25:22,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:25:22,888 INFO L225 Difference]: With dead ends: 44 [2022-11-19 08:25:22,889 INFO L226 Difference]: Without dead ends: 44 [2022-11-19 08:25:22,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=262, Invalid=1900, Unknown=0, NotChecked=0, Total=2162 [2022-11-19 08:25:22,890 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 71 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:25:22,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 17 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 88 Invalid, 0 Unknown, 110 Unchecked, 0.1s Time] [2022-11-19 08:25:22,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-19 08:25:22,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2022-11-19 08:25:22,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 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) [2022-11-19 08:25:22,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-11-19 08:25:22,894 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 14 [2022-11-19 08:25:22,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:25:22,894 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-11-19 08:25:22,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:22,895 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-11-19 08:25:22,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 08:25:22,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:22,896 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1] [2022-11-19 08:25:22,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-19 08:25:23,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 08:25:23,102 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-19 08:25:23,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:23,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1883991265, now seen corresponding path program 2 times [2022-11-19 08:25:23,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:23,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922482010] [2022-11-19 08:25:23,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:23,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:23,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:23,797 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:23,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:25:23,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922482010] [2022-11-19 08:25:23,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922482010] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:25:23,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647240719] [2022-11-19 08:25:23,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:25:23,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:25:23,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:25:23,800 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:25:23,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:25:23,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 08:25:23,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:25:23,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-19 08:25:23,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:25:24,024 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 [2022-11-19 08:25:29,628 INFO L321 Elim1Store]: treesize reduction 22, result has 82.4 percent of original size [2022-11-19 08:25:29,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 130 [2022-11-19 08:25:30,891 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:30,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:25:31,795 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:25:31,795 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 181 treesize of output 189 [2022-11-19 08:25:31,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:25:31,875 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 58 treesize of output 54 [2022-11-19 08:25:32,071 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:25:32,071 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 146 treesize of output 156 [2022-11-19 08:25:32,194 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:25:32,195 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 114 treesize of output 116 [2022-11-19 08:25:32,302 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:25:32,304 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 171 treesize of output 195 [2022-11-19 08:25:33,731 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:33,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647240719] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:25:33,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [158184674] [2022-11-19 08:25:33,734 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:25:33,734 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:25:33,734 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:25:33,735 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:25:33,735 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:25:33,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:33,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-19 08:25:33,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:25:33,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:33,826 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 [2022-11-19 08:25:34,062 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:25:35,733 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1197#(and (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) |ULTIMATE.start_cstrcmp_#t~short5#1| (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ |ULTIMATE.start_cstrcmp_~s2#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.base|) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-19 08:25:35,734 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:25:35,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:25:35,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 31 [2022-11-19 08:25:35,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009871331] [2022-11-19 08:25:35,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:25:35,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-19 08:25:35,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:25:35,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-19 08:25:35,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1404, Unknown=2, NotChecked=0, Total=1560 [2022-11-19 08:25:35,736 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 33 states, 32 states have (on average 1.53125) internal successors, (49), 32 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:37,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:25:37,189 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2022-11-19 08:25:37,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-19 08:25:37,190 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.53125) internal successors, (49), 32 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-19 08:25:37,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:25:37,190 INFO L225 Difference]: With dead ends: 40 [2022-11-19 08:25:37,191 INFO L226 Difference]: Without dead ends: 34 [2022-11-19 08:25:37,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=339, Invalid=2965, Unknown=2, NotChecked=0, Total=3306 [2022-11-19 08:25:37,193 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:25:37,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 17 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 144 Invalid, 0 Unknown, 103 Unchecked, 0.1s Time] [2022-11-19 08:25:37,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-19 08:25:37,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-11-19 08:25:37,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.1) internal successors, (33), 32 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:37,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2022-11-19 08:25:37,196 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 17 [2022-11-19 08:25:37,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:25:37,197 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2022-11-19 08:25:37,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.53125) internal successors, (49), 32 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:37,197 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2022-11-19 08:25:37,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:25:37,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:37,198 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1] [2022-11-19 08:25:37,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:25:37,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 08:25:37,406 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-19 08:25:37,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:37,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1516966172, now seen corresponding path program 3 times [2022-11-19 08:25:37,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:37,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420128827] [2022-11-19 08:25:37,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:37,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:37,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:38,159 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:38,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:25:38,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420128827] [2022-11-19 08:25:38,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420128827] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:25:38,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977876265] [2022-11-19 08:25:38,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:25:38,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:25:38,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:25:38,162 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:25:38,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:25:38,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:25:38,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:25:38,268 WARN L261 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 107 conjunts are in the unsatisfiable core [2022-11-19 08:25:38,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:25:38,302 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 [2022-11-19 08:25:38,373 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-19 08:25:38,373 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 23 treesize of output 22 [2022-11-19 08:25:40,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:40,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:40,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:40,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:40,724 INFO L321 Elim1Store]: treesize reduction 162, result has 22.5 percent of original size [2022-11-19 08:25:40,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 39 case distinctions, treesize of input 117 treesize of output 91 [2022-11-19 08:25:40,855 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:40,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:25:43,070 INFO L321 Elim1Store]: treesize reduction 74, result has 40.3 percent of original size [2022-11-19 08:25:43,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 833 treesize of output 662 [2022-11-19 08:25:43,112 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:25:43,113 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 532 treesize of output 490 [2022-11-19 08:25:43,138 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 16 treesize of output 12 [2022-11-19 08:25:43,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 529 treesize of output 473 [2022-11-19 08:25:43,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:43,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:43,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:43,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:43,509 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:25:43,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 16 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 20 case distinctions, treesize of input 168 treesize of output 307 [2022-11-19 08:25:47,036 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-11-19 08:25:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:47,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977876265] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:25:47,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [581167520] [2022-11-19 08:25:47,226 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:25:47,227 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:25:47,227 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:25:47,227 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:25:47,227 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:25:47,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:47,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-19 08:25:47,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:25:47,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:47,312 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 [2022-11-19 08:25:47,544 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:25:49,858 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1508#(and (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|) (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.offset|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-19 08:25:49,858 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:25:49,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:25:49,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 23, 23] total 55 [2022-11-19 08:25:49,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007261803] [2022-11-19 08:25:49,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:25:49,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-19 08:25:49,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:25:49,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-19 08:25:49,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=3504, Unknown=0, NotChecked=0, Total=4032 [2022-11-19 08:25:49,862 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 57 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 56 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:53,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:25:53,701 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2022-11-19 08:25:53,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-19 08:25:53,702 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 56 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 24 [2022-11-19 08:25:53,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:25:53,704 INFO L225 Difference]: With dead ends: 58 [2022-11-19 08:25:53,704 INFO L226 Difference]: Without dead ends: 58 [2022-11-19 08:25:53,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2887 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=1101, Invalid=8211, Unknown=0, NotChecked=0, Total=9312 [2022-11-19 08:25:53,707 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 91 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:25:53,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 6 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 288 Invalid, 0 Unknown, 56 Unchecked, 0.3s Time] [2022-11-19 08:25:53,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-19 08:25:53,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2022-11-19 08:25:53,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:53,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2022-11-19 08:25:53,712 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 24 [2022-11-19 08:25:53,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:25:53,712 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2022-11-19 08:25:53,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 56 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:53,713 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2022-11-19 08:25:53,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 08:25:53,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:53,713 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1] [2022-11-19 08:25:53,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-19 08:25:53,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 08:25:53,920 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-19 08:25:53,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:53,920 INFO L85 PathProgramCache]: Analyzing trace with hash 294595777, now seen corresponding path program 3 times [2022-11-19 08:25:53,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:53,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824951773] [2022-11-19 08:25:53,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:53,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:53,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:54,641 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:54,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:25:54,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824951773] [2022-11-19 08:25:54,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824951773] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:25:54,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511050325] [2022-11-19 08:25:54,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:25:54,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:25:54,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:25:54,645 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:25:54,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:25:54,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:25:54,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:25:54,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-19 08:25:54,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:25:54,787 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:25:54,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-19 08:25:54,821 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 13 treesize of output 9 [2022-11-19 08:25:56,856 INFO L321 Elim1Store]: treesize reduction 84, result has 27.0 percent of original size [2022-11-19 08:25:56,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 30 case distinctions, treesize of input 104 treesize of output 72 [2022-11-19 08:25:57,007 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:57,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:25:59,538 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:25:59,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 385 treesize of output 433 [2022-11-19 08:25:59,649 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 66 treesize of output 58 [2022-11-19 08:26:00,077 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 66 treesize of output 58 [2022-11-19 08:26:00,226 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 66 treesize of output 58 [2022-11-19 08:26:00,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 94 [2022-11-19 08:26:00,405 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 66 treesize of output 58 [2022-11-19 08:26:01,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 128 [2022-11-19 08:26:01,738 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 66 treesize of output 58 [2022-11-19 08:26:01,857 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 66 treesize of output 58 [2022-11-19 08:26:01,917 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 66 treesize of output 58 [2022-11-19 08:26:02,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 75 [2022-11-19 08:26:02,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 75 [2022-11-19 08:26:02,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 92 [2022-11-19 08:26:02,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 75 [2022-11-19 08:26:02,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 110 [2022-11-19 08:26:02,826 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:26:02,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 223 treesize of output 217 [2022-11-19 08:26:04,017 INFO L321 Elim1Store]: treesize reduction 8, result has 89.6 percent of original size [2022-11-19 08:26:04,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 200 treesize of output 220 [2022-11-19 08:26:05,152 INFO L321 Elim1Store]: treesize reduction 8, result has 79.5 percent of original size [2022-11-19 08:26:05,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 148 treesize of output 150 [2022-11-19 08:26:05,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 152 [2022-11-19 08:26:05,493 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:26:05,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 367 treesize of output 329 [2022-11-19 08:26:06,644 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:26:06,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 560 treesize of output 524 [2022-11-19 08:26:13,647 INFO L321 Elim1Store]: treesize reduction 8, result has 89.6 percent of original size [2022-11-19 08:26:13,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 298 treesize of output 306 [2022-11-19 08:26:15,918 INFO L321 Elim1Store]: treesize reduction 8, result has 79.5 percent of original size [2022-11-19 08:26:15,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 191 treesize of output 189 [2022-11-19 08:26:16,526 INFO L321 Elim1Store]: treesize reduction 16, result has 86.1 percent of original size [2022-11-19 08:26:16,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 201 treesize of output 243 [2022-11-19 08:26:18,102 INFO L321 Elim1Store]: treesize reduction 16, result has 79.2 percent of original size [2022-11-19 08:26:18,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 170 treesize of output 190 [2022-11-19 08:26:18,914 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:26:18,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 1904 treesize of output 1626 [2022-11-19 08:26:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:26:55,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511050325] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:26:55,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1766060016] [2022-11-19 08:26:55,658 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:26:55,658 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:26:55,659 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:26:55,659 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:26:55,659 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:26:55,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:26:55,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-19 08:26:55,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:26:55,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:26:55,749 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 [2022-11-19 08:26:55,929 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:26:58,306 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1901#(and (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) |ULTIMATE.start_cstrcmp_#t~short5#1| (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ |ULTIMATE.start_cstrcmp_~s2#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.base|) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-19 08:26:58,307 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:26:58,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:26:58,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 22, 22] total 54 [2022-11-19 08:26:58,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535306205] [2022-11-19 08:26:58,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:26:58,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-19 08:26:58,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:26:58,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-19 08:26:58,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=3531, Unknown=0, NotChecked=0, Total=3906 [2022-11-19 08:26:58,309 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 56 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 55 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:27:01,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:27:01,730 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2022-11-19 08:27:01,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-19 08:27:01,731 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 55 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-19 08:27:01,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:27:01,731 INFO L225 Difference]: With dead ends: 53 [2022-11-19 08:27:01,731 INFO L226 Difference]: Without dead ends: 53 [2022-11-19 08:27:01,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2613 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=760, Invalid=7982, Unknown=0, NotChecked=0, Total=8742 [2022-11-19 08:27:01,734 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:27:01,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 20 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 135 Unchecked, 0.1s Time] [2022-11-19 08:27:01,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-19 08:27:01,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-19 08:27:01,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 50 states have (on average 1.14) internal successors, (57), 52 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:27:01,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2022-11-19 08:27:01,740 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 27 [2022-11-19 08:27:01,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:27:01,740 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2022-11-19 08:27:01,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 55 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:27:01,741 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2022-11-19 08:27:01,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 08:27:01,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:27:01,742 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:27:01,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 08:27:01,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:27:01,947 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-19 08:27:01,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:27:01,947 INFO L85 PathProgramCache]: Analyzing trace with hash 542815258, now seen corresponding path program 1 times [2022-11-19 08:27:01,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:27:01,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404352757] [2022-11-19 08:27:01,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:27:01,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:27:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:27:02,763 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:27:02,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:27:02,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404352757] [2022-11-19 08:27:02,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404352757] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:27:02,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063728112] [2022-11-19 08:27:02,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:27:02,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:27:02,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:27:02,765 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:27:02,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731302cd-f62a-4536-8a53-bbc4bf0aa5d8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 08:27:02,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:27:02,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-19 08:27:02,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:27:02,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:27:05,644 INFO L321 Elim1Store]: treesize reduction 66, result has 83.4 percent of original size [2022-11-19 08:27:05,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 30 case distinctions, treesize of input 111 treesize of output 372