./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 382beab9cdcef42f6594628efe520684fdbc8c72ada26cb53ddf4918b8957d49 --- 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-6b4ec56 [2022-11-20 19:52:20,036 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 19:52:20,039 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 19:52:20,073 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 19:52:20,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 19:52:20,081 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 19:52:20,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 19:52:20,104 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 19:52:20,105 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 19:52:20,106 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 19:52:20,107 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 19:52:20,108 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 19:52:20,108 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 19:52:20,109 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 19:52:20,110 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 19:52:20,111 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 19:52:20,112 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 19:52:20,113 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 19:52:20,114 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 19:52:20,116 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 19:52:20,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 19:52:20,118 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 19:52:20,119 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 19:52:20,120 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 19:52:20,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 19:52:20,131 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 19:52:20,131 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 19:52:20,132 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 19:52:20,133 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 19:52:20,134 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 19:52:20,135 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 19:52:20,136 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 19:52:20,137 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 19:52:20,138 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 19:52:20,139 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 19:52:20,140 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 19:52:20,141 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 19:52:20,142 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 19:52:20,143 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 19:52:20,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 19:52:20,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 19:52:20,146 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-20 19:52:20,169 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 19:52:20,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 19:52:20,170 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 19:52:20,170 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 19:52:20,170 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 19:52:20,171 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 19:52:20,171 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 19:52:20,171 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 19:52:20,171 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 19:52:20,171 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 19:52:20,171 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 19:52:20,172 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 19:52:20,172 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 19:52:20,172 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 19:52:20,172 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 19:52:20,172 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 19:52:20,173 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 19:52:20,173 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 19:52:20,173 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 19:52:20,174 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 19:52:20,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 19:52:20,174 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 19:52:20,174 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 19:52:20,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 19:52:20,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 19:52:20,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 19:52:20,175 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 19:52:20,175 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 19:52:20,175 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 19:52:20,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 19:52:20,176 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 19:52:20,176 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 19:52:20,176 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 19:52:20,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 19:52:20,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 19:52:20,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:52:20,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 19:52:20,177 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 19:52:20,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 19:52:20,177 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 19:52:20,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 19:52:20,178 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 19:52:20,178 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_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 382beab9cdcef42f6594628efe520684fdbc8c72ada26cb53ddf4918b8957d49 [2022-11-20 19:52:20,521 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 19:52:20,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 19:52:20,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 19:52:20,555 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 19:52:20,556 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 19:52:20,557 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i [2022-11-20 19:52:23,665 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 19:52:23,957 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 19:52:23,979 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i [2022-11-20 19:52:24,011 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/data/0da304126/3359c9232ce146b385fa65d4583ba98f/FLAGafb03c844 [2022-11-20 19:52:24,035 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/data/0da304126/3359c9232ce146b385fa65d4583ba98f [2022-11-20 19:52:24,040 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 19:52:24,043 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 19:52:24,045 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 19:52:24,046 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 19:52:24,049 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 19:52:24,051 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:52:24" (1/1) ... [2022-11-20 19:52:24,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6882afd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:24, skipping insertion in model container [2022-11-20 19:52:24,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:52:24" (1/1) ... [2022-11-20 19:52:24,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 19:52:24,114 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 19:52:24,421 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:52:24,435 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 19:52:24,492 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:52:24,517 INFO L208 MainTranslator]: Completed translation [2022-11-20 19:52:24,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:24 WrapperNode [2022-11-20 19:52:24,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 19:52:24,519 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 19:52:24,519 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 19:52:24,519 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 19:52:24,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:24" (1/1) ... [2022-11-20 19:52:24,540 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:24" (1/1) ... [2022-11-20 19:52:24,560 INFO L138 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 92 [2022-11-20 19:52:24,561 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 19:52:24,561 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 19:52:24,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 19:52:24,562 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 19:52:24,571 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:24" (1/1) ... [2022-11-20 19:52:24,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:24" (1/1) ... [2022-11-20 19:52:24,574 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:24" (1/1) ... [2022-11-20 19:52:24,574 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:24" (1/1) ... [2022-11-20 19:52:24,580 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:24" (1/1) ... [2022-11-20 19:52:24,584 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:24" (1/1) ... [2022-11-20 19:52:24,586 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:24" (1/1) ... [2022-11-20 19:52:24,587 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:24" (1/1) ... [2022-11-20 19:52:24,589 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 19:52:24,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 19:52:24,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 19:52:24,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 19:52:24,591 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:24" (1/1) ... [2022-11-20 19:52:24,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:52:24,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:52:24,631 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 19:52:24,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 19:52:24,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 19:52:24,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 19:52:24,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 19:52:24,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 19:52:24,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 19:52:24,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 19:52:24,846 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 19:52:24,848 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 19:52:25,055 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 19:52:25,212 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 19:52:25,212 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 19:52:25,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:52:25 BoogieIcfgContainer [2022-11-20 19:52:25,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 19:52:25,218 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 19:52:25,218 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 19:52:25,221 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 19:52:25,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:52:24" (1/3) ... [2022-11-20 19:52:25,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9994f0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:52:25, skipping insertion in model container [2022-11-20 19:52:25,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:24" (2/3) ... [2022-11-20 19:52:25,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9994f0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:52:25, skipping insertion in model container [2022-11-20 19:52:25,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:52:25" (3/3) ... [2022-11-20 19:52:25,225 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrcmp-alloca-2.i [2022-11-20 19:52:25,244 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 19:52:25,244 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2022-11-20 19:52:25,300 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 19:52:25,306 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;@463916b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 19:52:25,307 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2022-11-20 19:52:25,311 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 15 states have (on average 2.6) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:25,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 19:52:25,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:25,318 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 19:52:25,319 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 19:52:25,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:25,324 INFO L85 PathProgramCache]: Analyzing trace with hash 145849, now seen corresponding path program 1 times [2022-11-20 19:52:25,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:52:25,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754695594] [2022-11-20 19:52:25,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:25,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:52:25,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:25,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:25,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:52:25,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754695594] [2022-11-20 19:52:25,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754695594] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:52:25,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:52:25,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 19:52:25,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683002812] [2022-11-20 19:52:25,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:52:25,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:52:25,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:52:25,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:52:25,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:52:25,744 INFO L87 Difference]: Start difference. First operand has 35 states, 15 states have (on average 2.6) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:25,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:25,810 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2022-11-20 19:52:25,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:52:25,813 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 [2022-11-20 19:52:25,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:25,821 INFO L225 Difference]: With dead ends: 33 [2022-11-20 19:52:25,821 INFO L226 Difference]: Without dead ends: 32 [2022-11-20 19:52:25,823 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 [2022-11-20 19:52:25,826 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:52:25,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 14 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 19:52:25,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-20 19:52:25,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-20 19:52:25,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 31 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:25,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-11-20 19:52:25,862 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 3 [2022-11-20 19:52:25,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:25,862 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-11-20 19:52:25,862 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) [2022-11-20 19:52:25,863 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-11-20 19:52:25,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 19:52:25,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:25,863 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 19:52:25,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 19:52:25,864 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 19:52:25,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:25,865 INFO L85 PathProgramCache]: Analyzing trace with hash 145850, now seen corresponding path program 1 times [2022-11-20 19:52:25,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:52:25,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498590382] [2022-11-20 19:52:25,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:25,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:52:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:26,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:26,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:52:26,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498590382] [2022-11-20 19:52:26,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498590382] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:52:26,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:52:26,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 19:52:26,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186848814] [2022-11-20 19:52:26,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:52:26,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:52:26,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:52:26,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:52:26,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:52:26,306 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:26,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:26,469 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2022-11-20 19:52:26,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 19:52:26,470 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 19:52:26,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:26,472 INFO L225 Difference]: With dead ends: 62 [2022-11-20 19:52:26,473 INFO L226 Difference]: Without dead ends: 62 [2022-11-20 19:52:26,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:52:26,482 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:52:26,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 40 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:52:26,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-20 19:52:26,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 34. [2022-11-20 19:52:26,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 17 states have (on average 2.235294117647059) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:26,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-11-20 19:52:26,490 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 3 [2022-11-20 19:52:26,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:26,490 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-11-20 19:52:26,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:26,491 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-11-20 19:52:26,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 19:52:26,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:26,491 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 19:52:26,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 19:52:26,492 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 19:52:26,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:26,493 INFO L85 PathProgramCache]: Analyzing trace with hash 4614496, now seen corresponding path program 1 times [2022-11-20 19:52:26,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:52:26,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514030570] [2022-11-20 19:52:26,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:26,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:52:26,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:26,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:26,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:52:26,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514030570] [2022-11-20 19:52:26,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514030570] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:52:26,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:52:26,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 19:52:26,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026610872] [2022-11-20 19:52:26,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:52:26,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:52:26,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:52:26,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:52:26,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:52:26,798 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:26,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:26,857 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-11-20 19:52:26,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:52:26,858 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-20 19:52:26,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:26,859 INFO L225 Difference]: With dead ends: 33 [2022-11-20 19:52:26,859 INFO L226 Difference]: Without dead ends: 33 [2022-11-20 19:52:26,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:52:26,868 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 13 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 [2022-11-20 19:52:26,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 13 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 19:52:26,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-20 19:52:26,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-20 19:52:26,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 2.176470588235294) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:26,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-11-20 19:52:26,880 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 4 [2022-11-20 19:52:26,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:26,881 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-11-20 19:52:26,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:26,881 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-11-20 19:52:26,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 19:52:26,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:26,882 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 19:52:26,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 19:52:26,883 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 19:52:26,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:26,891 INFO L85 PathProgramCache]: Analyzing trace with hash 4612192, now seen corresponding path program 1 times [2022-11-20 19:52:26,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:52:26,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652712650] [2022-11-20 19:52:26,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:26,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:52:26,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:26,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:26,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:52:26,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652712650] [2022-11-20 19:52:26,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652712650] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:52:26,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:52:26,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 19:52:26,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853512958] [2022-11-20 19:52:26,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:52:26,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:52:26,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:52:26,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:52:26,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:52:26,963 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:27,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:27,006 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-11-20 19:52:27,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:52:27,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-20 19:52:27,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:27,008 INFO L225 Difference]: With dead ends: 31 [2022-11-20 19:52:27,009 INFO L226 Difference]: Without dead ends: 31 [2022-11-20 19:52:27,010 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 [2022-11-20 19:52:27,011 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 13 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 [2022-11-20 19:52:27,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 13 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 19:52:27,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-20 19:52:27,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-20 19:52:27,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:27,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-11-20 19:52:27,017 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 4 [2022-11-20 19:52:27,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:27,017 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-11-20 19:52:27,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:27,017 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-11-20 19:52:27,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 19:52:27,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:27,017 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 19:52:27,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 19:52:27,018 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 19:52:27,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:27,018 INFO L85 PathProgramCache]: Analyzing trace with hash 4612193, now seen corresponding path program 1 times [2022-11-20 19:52:27,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:52:27,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790001874] [2022-11-20 19:52:27,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:27,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:52:27,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:27,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:27,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:52:27,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790001874] [2022-11-20 19:52:27,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790001874] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:52:27,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:52:27,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:52:27,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522326242] [2022-11-20 19:52:27,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:52:27,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 19:52:27,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:52:27,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 19:52:27,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:52:27,188 INFO L87 Difference]: Start difference. First operand 31 states and 35 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) [2022-11-20 19:52:27,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:27,293 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2022-11-20 19:52:27,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:52:27,294 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 [2022-11-20 19:52:27,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:27,294 INFO L225 Difference]: With dead ends: 55 [2022-11-20 19:52:27,294 INFO L226 Difference]: Without dead ends: 55 [2022-11-20 19:52:27,295 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 [2022-11-20 19:52:27,296 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:52:27,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 33 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:52:27,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-20 19:52:27,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2022-11-20 19:52:27,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 2.0) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:27,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-11-20 19:52:27,299 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 4 [2022-11-20 19:52:27,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:27,300 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-11-20 19:52:27,300 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) [2022-11-20 19:52:27,300 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-11-20 19:52:27,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 19:52:27,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:27,300 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 19:52:27,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 19:52:27,301 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 19:52:27,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:27,301 INFO L85 PathProgramCache]: Analyzing trace with hash 143049370, now seen corresponding path program 1 times [2022-11-20 19:52:27,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:52:27,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215327165] [2022-11-20 19:52:27,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:27,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:52:27,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:27,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:27,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:52:27,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215327165] [2022-11-20 19:52:27,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215327165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:52:27,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:52:27,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:52:27,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534701913] [2022-11-20 19:52:27,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:52:27,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 19:52:27,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:52:27,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 19:52:27,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:52:27,496 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:27,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:27,537 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2022-11-20 19:52:27,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:52:27,537 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 19:52:27,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:27,538 INFO L225 Difference]: With dead ends: 32 [2022-11-20 19:52:27,538 INFO L226 Difference]: Without dead ends: 32 [2022-11-20 19:52:27,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:52:27,539 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:52:27,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 11 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 19:52:27,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-20 19:52:27,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-20 19:52:27,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:27,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-11-20 19:52:27,543 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 5 [2022-11-20 19:52:27,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:27,543 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-11-20 19:52:27,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:27,544 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-11-20 19:52:27,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 19:52:27,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:27,544 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2022-11-20 19:52:27,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 19:52:27,545 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 19:52:27,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:27,545 INFO L85 PathProgramCache]: Analyzing trace with hash 140237547, now seen corresponding path program 1 times [2022-11-20 19:52:27,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:52:27,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555508460] [2022-11-20 19:52:27,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:27,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:52:27,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:27,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:27,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:52:27,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555508460] [2022-11-20 19:52:27,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555508460] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:52:27,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731592971] [2022-11-20 19:52:27,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:27,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:52:27,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:52:27,764 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:52:27,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 19:52:27,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:27,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 19:52:27,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:27,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:27,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-20 19:52:27,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 19:52:28,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:28,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:52:28,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:28,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731592971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:52:28,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [173640876] [2022-11-20 19:52:28,355 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-11-20 19:52:28,355 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:52:28,360 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:52:28,365 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:52:28,365 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:52:28,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:28,425 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 [2022-11-20 19:52:28,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:52:28,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:52:28,699 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:52:29,150 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '542#(and (not (<= (+ |ULTIMATE.start_main_~nondetString1~0#1.offset| |ULTIMATE.start_main_~i~0#1| 1) (select |#length| |ULTIMATE.start_main_~nondetString1~0#1.base|))) (< (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_#t~nondet15#1| 127) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet15#1|)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-20 19:52:29,150 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:52:29,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:52:29,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-11-20 19:52:29,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855385278] [2022-11-20 19:52:29,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 19:52:29,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 19:52:29,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:52:29,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 19:52:29,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-20 19:52:29,152 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:29,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:29,493 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2022-11-20 19:52:29,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 19:52:29,494 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 19:52:29,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:29,494 INFO L225 Difference]: With dead ends: 84 [2022-11-20 19:52:29,494 INFO L226 Difference]: Without dead ends: 84 [2022-11-20 19:52:29,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-11-20 19:52:29,495 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 219 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:52:29,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 154 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:52:29,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-20 19:52:29,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 29. [2022-11-20 19:52:29,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:29,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-11-20 19:52:29,499 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 5 [2022-11-20 19:52:29,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:29,499 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-11-20 19:52:29,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:29,500 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-11-20 19:52:29,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 19:52:29,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:29,500 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 19:52:29,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 19:52:29,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:52:29,705 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 19:52:29,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:29,706 INFO L85 PathProgramCache]: Analyzing trace with hash 139564695, now seen corresponding path program 1 times [2022-11-20 19:52:29,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:52:29,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528307942] [2022-11-20 19:52:29,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:29,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:52:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:29,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:29,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:52:29,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528307942] [2022-11-20 19:52:29,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528307942] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:52:29,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:52:29,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:52:29,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862679902] [2022-11-20 19:52:29,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:52:29,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 19:52:29,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:52:29,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 19:52:29,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:52:29,789 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:29,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:29,858 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-11-20 19:52:29,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 19:52:29,859 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 19:52:29,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:29,861 INFO L225 Difference]: With dead ends: 45 [2022-11-20 19:52:29,861 INFO L226 Difference]: Without dead ends: 45 [2022-11-20 19:52:29,862 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 [2022-11-20 19:52:29,863 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 105 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:52:29,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 16 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:52:29,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-20 19:52:29,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 35. [2022-11-20 19:52:29,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 2.0) internal successors, (46), 34 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:29,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-11-20 19:52:29,879 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 6 [2022-11-20 19:52:29,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:29,879 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-11-20 19:52:29,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:29,880 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-11-20 19:52:29,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 19:52:29,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:29,880 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 19:52:29,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 19:52:29,881 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 19:52:29,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:29,881 INFO L85 PathProgramCache]: Analyzing trace with hash 139564694, now seen corresponding path program 1 times [2022-11-20 19:52:29,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:52:29,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323371288] [2022-11-20 19:52:29,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:29,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:52:29,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:29,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:29,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:52:29,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323371288] [2022-11-20 19:52:29,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323371288] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:52:29,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:52:29,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:52:29,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250072640] [2022-11-20 19:52:29,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:52:29,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:52:29,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:52:29,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:52:29,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:52:29,930 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:29,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:29,969 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2022-11-20 19:52:29,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 19:52:29,970 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 19:52:29,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:29,970 INFO L225 Difference]: With dead ends: 32 [2022-11-20 19:52:29,971 INFO L226 Difference]: Without dead ends: 32 [2022-11-20 19:52:29,971 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 [2022-11-20 19:52:29,973 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 37 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:52:29,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 12 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 19:52:29,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-20 19:52:29,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-20 19:52:29,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:29,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-11-20 19:52:29,979 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 6 [2022-11-20 19:52:29,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:29,979 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-11-20 19:52:29,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:29,980 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-11-20 19:52:29,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 19:52:29,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:29,980 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-20 19:52:29,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 19:52:29,981 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 19:52:29,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:29,981 INFO L85 PathProgramCache]: Analyzing trace with hash 137416840, now seen corresponding path program 1 times [2022-11-20 19:52:29,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:52:29,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298702993] [2022-11-20 19:52:29,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:29,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:52:30,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:30,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:30,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:52:30,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298702993] [2022-11-20 19:52:30,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298702993] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:52:30,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994465743] [2022-11-20 19:52:30,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:30,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:52:30,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:52:30,266 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:52:30,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 19:52:30,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:30,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 19:52:30,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:30,383 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 19:52:30,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2022-11-20 19:52:30,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:30,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:52:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:30,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994465743] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:52:30,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1354641860] [2022-11-20 19:52:30,721 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-20 19:52:30,721 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:52:30,722 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:52:30,722 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:52:30,722 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:52:30,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:30,767 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 [2022-11-20 19:52:30,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:52:30,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:52:30,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:52:30,945 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:52:31,514 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '865#(and (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet17#1|)) (not (<= (+ |ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~i~1#1| 1) (select |#length| |ULTIMATE.start_main_~nondetString2~0#1.base|))) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= |ULTIMATE.start_main_#t~nondet17#1| 127) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 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 [2022-11-20 19:52:31,514 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:52:31,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:52:31,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2022-11-20 19:52:31,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552310966] [2022-11-20 19:52:31,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 19:52:31,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 19:52:31,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:52:31,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 19:52:31,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-11-20 19:52:31,516 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:31,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:31,816 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2022-11-20 19:52:31,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 19:52:31,817 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 19:52:31,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:31,817 INFO L225 Difference]: With dead ends: 80 [2022-11-20 19:52:31,818 INFO L226 Difference]: Without dead ends: 80 [2022-11-20 19:52:31,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-11-20 19:52:31,819 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 169 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:52:31,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 83 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:52:31,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-20 19:52:31,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 29. [2022-11-20 19:52:31,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:31,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-11-20 19:52:31,821 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 6 [2022-11-20 19:52:31,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:31,821 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-11-20 19:52:31,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:31,822 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-11-20 19:52:31,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 19:52:31,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:31,822 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:52:31,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 19:52:32,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 19:52:32,023 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 19:52:32,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:32,024 INFO L85 PathProgramCache]: Analyzing trace with hash 244834790, now seen corresponding path program 1 times [2022-11-20 19:52:32,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:52:32,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417138316] [2022-11-20 19:52:32,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:32,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:52:32,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:32,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:52:32,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417138316] [2022-11-20 19:52:32,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417138316] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:52:32,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:52:32,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 19:52:32,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736972294] [2022-11-20 19:52:32,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:52:32,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:52:32,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:52:32,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:52:32,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:52:32,063 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 3 states, 2 states have (on average 4.5) 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) [2022-11-20 19:52:32,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:32,095 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2022-11-20 19:52:32,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:52:32,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) 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 [2022-11-20 19:52:32,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:32,096 INFO L225 Difference]: With dead ends: 27 [2022-11-20 19:52:32,096 INFO L226 Difference]: Without dead ends: 27 [2022-11-20 19:52:32,097 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 [2022-11-20 19:52:32,097 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:52:32,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 12 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 19:52:32,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-20 19:52:32,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-20 19:52:32,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 26 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) [2022-11-20 19:52:32,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-11-20 19:52:32,105 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 9 [2022-11-20 19:52:32,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:32,105 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-11-20 19:52:32,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) 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) [2022-11-20 19:52:32,106 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-11-20 19:52:32,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 19:52:32,106 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:32,106 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:52:32,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 19:52:32,107 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 19:52:32,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:32,107 INFO L85 PathProgramCache]: Analyzing trace with hash 244834791, now seen corresponding path program 1 times [2022-11-20 19:52:32,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:52:32,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141470402] [2022-11-20 19:52:32,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:32,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:52:32,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:32,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:32,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:52:32,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141470402] [2022-11-20 19:52:32,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141470402] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:52:32,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:52:32,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 19:52:32,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743832904] [2022-11-20 19:52:32,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:52:32,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:52:32,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:52:32,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:52:32,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:52:32,262 INFO L87 Difference]: Start difference. First operand 27 states and 33 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) [2022-11-20 19:52:32,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:32,322 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-11-20 19:52:32,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 19:52:32,323 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 [2022-11-20 19:52:32,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:32,323 INFO L225 Difference]: With dead ends: 30 [2022-11-20 19:52:32,323 INFO L226 Difference]: Without dead ends: 30 [2022-11-20 19:52:32,324 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 [2022-11-20 19:52:32,324 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 36 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:52:32,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 10 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 19:52:32,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-20 19:52:32,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-11-20 19:52:32,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.5) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:32,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-11-20 19:52:32,330 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 9 [2022-11-20 19:52:32,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:32,331 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-11-20 19:52:32,331 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) [2022-11-20 19:52:32,331 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-11-20 19:52:32,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 19:52:32,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:32,332 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:52:32,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 19:52:32,333 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 19:52:32,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:32,334 INFO L85 PathProgramCache]: Analyzing trace with hash 244843864, now seen corresponding path program 1 times [2022-11-20 19:52:32,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:52:32,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770460397] [2022-11-20 19:52:32,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:32,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:52:32,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:32,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:32,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:52:32,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770460397] [2022-11-20 19:52:32,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770460397] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:52:32,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:52:32,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:52:32,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603137308] [2022-11-20 19:52:32,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:52:32,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:52:32,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:52:32,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:52:32,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:52:32,361 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 3 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) [2022-11-20 19:52:32,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:32,383 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-11-20 19:52:32,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:52:32,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 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 [2022-11-20 19:52:32,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:32,384 INFO L225 Difference]: With dead ends: 30 [2022-11-20 19:52:32,384 INFO L226 Difference]: Without dead ends: 30 [2022-11-20 19:52:32,384 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 [2022-11-20 19:52:32,385 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:52:32,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 19:52:32,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-20 19:52:32,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-20 19:52:32,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:32,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-11-20 19:52:32,396 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 9 [2022-11-20 19:52:32,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:32,396 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-11-20 19:52:32,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2022-11-20 19:52:32,397 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-11-20 19:52:32,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 19:52:32,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:32,397 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:52:32,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 19:52:32,398 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 19:52:32,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:32,399 INFO L85 PathProgramCache]: Analyzing trace with hash -936929896, now seen corresponding path program 1 times [2022-11-20 19:52:32,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:52:32,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279859670] [2022-11-20 19:52:32,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:32,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:52:32,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:32,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:32,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:52:32,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279859670] [2022-11-20 19:52:32,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279859670] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:52:32,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:52:32,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 19:52:32,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927690993] [2022-11-20 19:52:32,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:52:32,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 19:52:32,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:52:32,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 19:52:32,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:52:32,698 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:32,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:32,836 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2022-11-20 19:52:32,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 19:52:32,836 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 19:52:32,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:32,837 INFO L225 Difference]: With dead ends: 43 [2022-11-20 19:52:32,837 INFO L226 Difference]: Without dead ends: 43 [2022-11-20 19:52:32,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-20 19:52:32,838 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 26 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:52:32,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 56 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:52:32,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-20 19:52:32,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2022-11-20 19:52:32,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:32,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2022-11-20 19:52:32,840 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 11 [2022-11-20 19:52:32,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:32,840 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2022-11-20 19:52:32,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:32,841 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-11-20 19:52:32,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 19:52:32,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:32,842 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:52:32,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 19:52:32,842 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 19:52:32,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:32,843 INFO L85 PathProgramCache]: Analyzing trace with hash -928260867, now seen corresponding path program 1 times [2022-11-20 19:52:32,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:52:32,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802308498] [2022-11-20 19:52:32,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:32,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:52:32,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:32,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:32,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:52:32,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802308498] [2022-11-20 19:52:32,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802308498] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:52:32,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:52:32,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 19:52:32,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625920917] [2022-11-20 19:52:32,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:52:32,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:52:32,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:52:33,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:52:33,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:52:33,000 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:33,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:33,028 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-11-20 19:52:33,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 19:52:33,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 19:52:33,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:33,029 INFO L225 Difference]: With dead ends: 36 [2022-11-20 19:52:33,029 INFO L226 Difference]: Without dead ends: 26 [2022-11-20 19:52:33,031 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 [2022-11-20 19:52:33,032 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:52:33,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 22 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 19:52:33,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-20 19:52:33,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-20 19:52:33,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.380952380952381) 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) [2022-11-20 19:52:33,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-11-20 19:52:33,033 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 11 [2022-11-20 19:52:33,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:33,034 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-11-20 19:52:33,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:33,034 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-11-20 19:52:33,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 19:52:33,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:33,035 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:52:33,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 19:52:33,035 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 19:52:33,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:33,036 INFO L85 PathProgramCache]: Analyzing trace with hash -764840503, now seen corresponding path program 1 times [2022-11-20 19:52:33,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:52:33,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632222692] [2022-11-20 19:52:33,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:33,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:52:33,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:33,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:33,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:52:33,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632222692] [2022-11-20 19:52:33,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632222692] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:52:33,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348933454] [2022-11-20 19:52:33,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:33,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:52:33,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:52:33,242 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:52:33,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 19:52:33,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:33,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 19:52:33,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:33,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:33,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:52:33,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 19:52:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:33,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348933454] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:52:33,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [960749971] [2022-11-20 19:52:33,558 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-20 19:52:33,558 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:52:33,558 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:52:33,559 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:52:33,559 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:52:33,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:33,593 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 [2022-11-20 19:52:33,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:52:33,714 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 [2022-11-20 19:52:33,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:52:33,789 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-20 19:52:33,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-20 19:52:33,972 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:52:36,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [960749971] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:52:36,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:52:36,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6, 6, 6] total 25 [2022-11-20 19:52:36,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531003195] [2022-11-20 19:52:36,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:52:36,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 19:52:36,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:52:36,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 19:52:36,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2022-11-20 19:52:36,093 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:36,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:36,223 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2022-11-20 19:52:36,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 19:52:36,224 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 19:52:36,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:36,224 INFO L225 Difference]: With dead ends: 35 [2022-11-20 19:52:36,224 INFO L226 Difference]: Without dead ends: 28 [2022-11-20 19:52:36,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2022-11-20 19:52:36,225 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 38 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:52:36,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 36 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:52:36,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-20 19:52:36,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-11-20 19:52:36,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 26 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) [2022-11-20 19:52:36,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-11-20 19:52:36,227 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 13 [2022-11-20 19:52:36,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:36,227 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-11-20 19:52:36,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:36,227 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-11-20 19:52:36,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 19:52:36,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:36,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:52:36,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 19:52:36,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 19:52:36,429 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 19:52:36,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:36,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1120431230, now seen corresponding path program 1 times [2022-11-20 19:52:36,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:52:36,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693047489] [2022-11-20 19:52:36,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:36,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:52:36,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:36,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:52:36,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:52:36,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693047489] [2022-11-20 19:52:36,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693047489] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:52:36,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901316875] [2022-11-20 19:52:36,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:36,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:52:36,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:52:36,619 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:52:36,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 19:52:36,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:36,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 19:52:36,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:36,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:52:36,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:52:36,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 19:52:36,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:52:36,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901316875] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:52:36,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1340823869] [2022-11-20 19:52:36,945 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-20 19:52:36,946 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:52:36,946 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:52:36,946 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:52:36,946 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:52:36,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:36,980 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 [2022-11-20 19:52:37,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:52:37,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:52:37,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:52:37,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:52:37,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:52:37,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:52:37,339 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-20 19:52:37,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-20 19:52:37,679 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:52:39,270 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1589#(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_main_~i~1#1|) (<= 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_~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|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |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|) (<= 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 [2022-11-20 19:52:39,271 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:52:39,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:52:39,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-11-20 19:52:39,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995656041] [2022-11-20 19:52:39,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 19:52:39,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 19:52:39,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:52:39,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 19:52:39,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2022-11-20 19:52:39,275 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:39,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:39,468 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-11-20 19:52:39,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 19:52:39,469 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 19:52:39,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:39,469 INFO L225 Difference]: With dead ends: 36 [2022-11-20 19:52:39,469 INFO L226 Difference]: Without dead ends: 36 [2022-11-20 19:52:39,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 19:52:39,470 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 158 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:52:39,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 29 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:52:39,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-20 19:52:39,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2022-11-20 19:52:39,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.2608695652173914) 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) [2022-11-20 19:52:39,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-11-20 19:52:39,472 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 15 [2022-11-20 19:52:39,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:39,472 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-11-20 19:52:39,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:39,472 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-11-20 19:52:39,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 19:52:39,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:39,473 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:52:39,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 19:52:39,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 19:52:39,679 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 19:52:39,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:39,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1720400156, now seen corresponding path program 1 times [2022-11-20 19:52:39,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:52:39,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266347888] [2022-11-20 19:52:39,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:39,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:52:39,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:39,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:52:39,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:52:39,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266347888] [2022-11-20 19:52:39,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266347888] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:52:39,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758816719] [2022-11-20 19:52:39,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:39,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:52:39,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:52:39,882 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:52:39,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 19:52:39,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:39,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 19:52:39,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:40,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:52:40,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:52:40,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 19:52:40,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:52:40,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758816719] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:52:40,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [506573463] [2022-11-20 19:52:40,174 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-20 19:52:40,174 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:52:40,174 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:52:40,175 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:52:40,175 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:52:40,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:40,220 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 [2022-11-20 19:52:40,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:52:40,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:52:40,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:52:40,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:52:40,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:52:40,525 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-20 19:52:40,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-20 19:52:40,857 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:52:42,288 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1789#(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_main_~i~1#1|) (<= 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|) (<= 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|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_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 [2022-11-20 19:52:42,288 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:52:42,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:52:42,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-11-20 19:52:42,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297484694] [2022-11-20 19:52:42,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 19:52:42,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 19:52:42,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:52:42,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 19:52:42,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-11-20 19:52:42,290 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 15 states, 14 states have (on average 3.0) internal successors, (42), 15 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) [2022-11-20 19:52:42,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:42,450 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-11-20 19:52:42,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 19:52:42,451 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 15 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 18 [2022-11-20 19:52:42,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:42,452 INFO L225 Difference]: With dead ends: 36 [2022-11-20 19:52:42,452 INFO L226 Difference]: Without dead ends: 31 [2022-11-20 19:52:42,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2022-11-20 19:52:42,453 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 102 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:52:42,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 41 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:52:42,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-20 19:52:42,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2022-11-20 19:52:42,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:42,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-11-20 19:52:42,455 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 18 [2022-11-20 19:52:42,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:42,456 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-11-20 19:52:42,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 15 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) [2022-11-20 19:52:42,456 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-11-20 19:52:42,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 19:52:42,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:42,457 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:52:42,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 19:52:42,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 19:52:42,663 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 19:52:42,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:42,663 INFO L85 PathProgramCache]: Analyzing trace with hash -257821811, now seen corresponding path program 2 times [2022-11-20 19:52:42,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:52:42,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201136649] [2022-11-20 19:52:42,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:42,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:52:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:43,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:52:43,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:52:43,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201136649] [2022-11-20 19:52:43,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201136649] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:52:43,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674443884] [2022-11-20 19:52:43,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 19:52:43,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:52:43,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:52:43,178 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:52:43,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 19:52:43,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 19:52:43,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:52:43,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 19:52:43,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:43,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-20 19:52:43,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:52:43,826 INFO L321 Elim1Store]: treesize reduction 17, result has 43.3 percent of original size [2022-11-20 19:52:43,827 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 47 treesize of output 33 [2022-11-20 19:52:43,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:52:43,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:52:44,097 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:52:44,098 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 95 treesize of output 95 [2022-11-20 19:52:44,111 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 34 treesize of output 30 [2022-11-20 19:52:44,141 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:52:44,142 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 51 treesize of output 51 [2022-11-20 19:52:44,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:52:44,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674443884] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:52:44,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [714595459] [2022-11-20 19:52:44,444 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-20 19:52:44,444 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:52:44,445 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:52:44,445 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:52:44,445 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:52:44,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:44,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-20 19:52:44,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:52:44,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:52:44,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:52:44,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:52:44,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:52:44,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:52:44,870 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-20 19:52:44,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-20 19:52:45,230 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:52:47,613 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2019#(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_main_~i~1#1|) (<= 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_~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|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |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|) (<= 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 [2022-11-20 19:52:47,613 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:52:47,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:52:47,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 31 [2022-11-20 19:52:47,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146740042] [2022-11-20 19:52:47,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 19:52:47,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 19:52:47,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:52:47,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 19:52:47,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1629, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 19:52:47,615 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 32 states, 32 states have (on average 1.78125) internal successors, (57), 31 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) [2022-11-20 19:52:48,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:48,401 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2022-11-20 19:52:48,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-20 19:52:48,401 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.78125) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-20 19:52:48,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:48,402 INFO L225 Difference]: With dead ends: 71 [2022-11-20 19:52:48,402 INFO L226 Difference]: Without dead ends: 35 [2022-11-20 19:52:48,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=436, Invalid=3470, Unknown=0, NotChecked=0, Total=3906 [2022-11-20 19:52:48,404 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 65 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:52:48,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 88 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 130 Invalid, 0 Unknown, 59 Unchecked, 0.1s Time] [2022-11-20 19:52:48,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-20 19:52:48,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-11-20 19:52:48,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:48,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-11-20 19:52:48,406 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2022-11-20 19:52:48,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:48,406 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-11-20 19:52:48,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.78125) internal successors, (57), 31 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) [2022-11-20 19:52:48,406 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-11-20 19:52:48,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 19:52:48,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:48,407 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-20 19:52:48,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 19:52:48,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:52:48,613 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 19:52:48,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:48,613 INFO L85 PathProgramCache]: Analyzing trace with hash 313879267, now seen corresponding path program 3 times [2022-11-20 19:52:48,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:52:48,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66625356] [2022-11-20 19:52:48,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:48,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:52:48,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:48,871 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 19:52:48,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:52:48,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66625356] [2022-11-20 19:52:48,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66625356] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:52:48,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884355573] [2022-11-20 19:52:48,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 19:52:48,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:52:48,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:52:48,873 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:52:48,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 19:52:48,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 19:52:48,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:52:49,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 19:52:49,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 19:52:49,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:52:49,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 19:52:49,325 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 19:52:49,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884355573] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:52:49,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1510918199] [2022-11-20 19:52:49,327 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-20 19:52:49,327 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:52:49,327 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:52:49,327 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:52:49,327 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:52:49,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:49,361 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 [2022-11-20 19:52:49,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:52:49,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:52:49,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:52:49,544 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 19:52:49,545 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 84 treesize of output 83 [2022-11-20 19:52:49,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:52:49,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:52:49,660 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-20 19:52:49,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-20 19:52:50,148 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:52:52,999 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2332#(and (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s1#1.offset|))) (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |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_main_~i~1#1|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (not (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|))) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcmp_~s1#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|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcmp_~s1#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= (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|) (<= 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|) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1) (= |#NULL.base| 0))' at error location [2022-11-20 19:52:53,000 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:52:53,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:52:53,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2022-11-20 19:52:53,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043637082] [2022-11-20 19:52:53,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 19:52:53,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 19:52:53,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:52:53,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 19:52:53,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-11-20 19:52:53,003 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:53,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:53,277 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2022-11-20 19:52:53,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 19:52:53,278 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-20 19:52:53,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:53,278 INFO L225 Difference]: With dead ends: 44 [2022-11-20 19:52:53,279 INFO L226 Difference]: Without dead ends: 44 [2022-11-20 19:52:53,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=212, Invalid=1194, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 19:52:53,280 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 202 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:52:53,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 41 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:52:53,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-20 19:52:53,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2022-11-20 19:52:53,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:53,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-11-20 19:52:53,282 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 24 [2022-11-20 19:52:53,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:53,283 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-11-20 19:52:53,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:53,283 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-11-20 19:52:53,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 19:52:53,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:53,284 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-20 19:52:53,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 19:52:53,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:52:53,490 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 19:52:53,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:53,490 INFO L85 PathProgramCache]: Analyzing trace with hash 634788379, now seen corresponding path program 2 times [2022-11-20 19:52:53,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:52:53,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587216339] [2022-11-20 19:52:53,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:53,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:52:53,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 19:52:53,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:52:53,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587216339] [2022-11-20 19:52:53,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587216339] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:52:53,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67280362] [2022-11-20 19:52:53,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 19:52:53,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:52:53,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:52:53,819 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:52:53,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 19:52:53,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 19:52:53,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:52:53,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 19:52:53,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:54,062 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 19:52:54,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:52:54,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-20 19:52:54,235 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 19:52:54,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67280362] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:52:54,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [137103622] [2022-11-20 19:52:54,237 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-20 19:52:54,237 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:52:54,237 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:52:54,237 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:52:54,238 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:52:54,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:54,271 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 [2022-11-20 19:52:54,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:52:54,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:52:54,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:52:54,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:52:54,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:52:54,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:52:54,623 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-20 19:52:54,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-20 19:52:54,880 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:52:56,417 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2611#(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_main_~i~1#1|) (<= 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|) (<= 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|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_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 [2022-11-20 19:52:56,418 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:52:56,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:52:56,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2022-11-20 19:52:56,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941639364] [2022-11-20 19:52:56,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 19:52:56,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 19:52:56,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:52:56,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 19:52:56,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2022-11-20 19:52:56,420 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 20 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:56,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:56,670 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2022-11-20 19:52:56,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 19:52:56,671 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-20 19:52:56,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:56,671 INFO L225 Difference]: With dead ends: 42 [2022-11-20 19:52:56,671 INFO L226 Difference]: Without dead ends: 39 [2022-11-20 19:52:56,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=195, Invalid=1065, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 19:52:56,673 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 128 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:52:56,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 40 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:52:56,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-20 19:52:56,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2022-11-20 19:52:56,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:56,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2022-11-20 19:52:56,675 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 27 [2022-11-20 19:52:56,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:56,677 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2022-11-20 19:52:56,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:56,678 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2022-11-20 19:52:56,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 19:52:56,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:56,680 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-20 19:52:56,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 19:52:56,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:52:56,882 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 19:52:56,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:56,882 INFO L85 PathProgramCache]: Analyzing trace with hash 146313420, now seen corresponding path program 4 times [2022-11-20 19:52:56,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:52:56,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917942391] [2022-11-20 19:52:56,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:56,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:52:56,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:57,390 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 19:52:57,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:52:57,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917942391] [2022-11-20 19:52:57,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917942391] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:52:57,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8064814] [2022-11-20 19:52:57,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 19:52:57,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:52:57,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:52:57,395 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:52:57,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 19:52:57,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:57,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-20 19:52:57,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:57,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:52:58,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:52:58,246 INFO L321 Elim1Store]: treesize reduction 15, result has 53.1 percent of original size [2022-11-20 19:52:58,246 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 37 [2022-11-20 19:52:58,253 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 19:52:58,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:52:58,634 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:52:58,635 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 95 treesize of output 95 [2022-11-20 19:52:58,663 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 34 treesize of output 30 [2022-11-20 19:52:58,680 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:52:58,681 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 51 treesize of output 51 [2022-11-20 19:52:59,001 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 19:52:59,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8064814] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:52:59,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1717719568] [2022-11-20 19:52:59,007 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-20 19:52:59,007 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:52:59,008 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:52:59,008 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:52:59,008 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:52:59,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:59,046 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 [2022-11-20 19:52:59,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:52:59,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:52:59,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:52:59,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:52:59,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:52:59,300 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-20 19:52:59,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-20 19:52:59,548 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:53:01,500 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2917#(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_main_~i~1#1|) (<= 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_~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|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |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|) (<= 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 [2022-11-20 19:53:01,500 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:53:01,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:53:01,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 36 [2022-11-20 19:53:01,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845260022] [2022-11-20 19:53:01,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 19:53:01,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-20 19:53:01,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:53:01,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-20 19:53:01,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=2085, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 19:53:01,503 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:53:02,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:53:02,699 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2022-11-20 19:53:02,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-20 19:53:02,702 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-20 19:53:02,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:53:02,703 INFO L225 Difference]: With dead ends: 97 [2022-11-20 19:53:02,703 INFO L226 Difference]: Without dead ends: 44 [2022-11-20 19:53:02,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=414, Invalid=4842, Unknown=0, NotChecked=0, Total=5256 [2022-11-20 19:53:02,705 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 69 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:53:02,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 108 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 334 Invalid, 0 Unknown, 87 Unchecked, 0.2s Time] [2022-11-20 19:53:02,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-20 19:53:02,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-11-20 19:53:02,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 41 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:53:02,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2022-11-20 19:53:02,713 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 29 [2022-11-20 19:53:02,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:53:02,713 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2022-11-20 19:53:02,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:53:02,714 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2022-11-20 19:53:02,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-20 19:53:02,715 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:53:02,715 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-20 19:53:02,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 19:53:02,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:53:02,916 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 19:53:02,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:53:02,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1315320778, now seen corresponding path program 5 times [2022-11-20 19:53:02,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:53:02,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928591699] [2022-11-20 19:53:02,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:53:02,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:53:02,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:53:03,260 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 19:53:03,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:53:03,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928591699] [2022-11-20 19:53:03,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928591699] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:53:03,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113501830] [2022-11-20 19:53:03,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 19:53:03,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:53:03,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:53:03,263 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:53:03,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 19:53:03,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 19:53:03,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:53:03,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 19:53:03,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:53:03,607 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 19:53:03,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:53:03,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-20 19:53:03,870 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 19:53:03,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113501830] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:53:03,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1068670707] [2022-11-20 19:53:03,876 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-20 19:53:03,876 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:53:03,877 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:53:03,877 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:53:03,877 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:53:03,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:03,906 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 [2022-11-20 19:53:03,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:53:03,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:53:04,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:53:04,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:53:04,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:53:04,153 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-20 19:53:04,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-20 19:53:04,468 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:53:06,460 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3336#(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_main_~i~1#1|) (<= 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_~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|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |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|) (<= 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 [2022-11-20 19:53:06,460 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:53:06,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:53:06,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 25 [2022-11-20 19:53:06,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624680887] [2022-11-20 19:53:06,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 19:53:06,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 19:53:06,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:53:06,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 19:53:06,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 19:53:06,463 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 27 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:53:06,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:53:06,798 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2022-11-20 19:53:06,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 19:53:06,798 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-20 19:53:06,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:53:06,799 INFO L225 Difference]: With dead ends: 53 [2022-11-20 19:53:06,799 INFO L226 Difference]: Without dead ends: 53 [2022-11-20 19:53:06,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=295, Invalid=1685, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 19:53:06,800 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 249 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:53:06,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 48 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:53:06,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-20 19:53:06,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2022-11-20 19:53:06,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:53:06,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-11-20 19:53:06,802 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 33 [2022-11-20 19:53:06,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:53:06,803 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-11-20 19:53:06,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:53:06,803 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-11-20 19:53:06,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 19:53:06,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:53:06,803 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-20 19:53:06,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 19:53:07,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-20 19:53:07,009 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 19:53:07,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:53:07,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1733307416, now seen corresponding path program 3 times [2022-11-20 19:53:07,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:53:07,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623240052] [2022-11-20 19:53:07,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:53:07,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:53:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:53:07,378 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 19:53:07,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:53:07,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623240052] [2022-11-20 19:53:07,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623240052] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:53:07,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459213906] [2022-11-20 19:53:07,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 19:53:07,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:53:07,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:53:07,383 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:53:07,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 19:53:07,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 19:53:07,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:53:07,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 19:53:07,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:53:07,543 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 19:53:07,544 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 [2022-11-20 19:53:07,676 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 19:53:07,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:53:07,935 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 19:53:07,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459213906] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:53:07,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1642525695] [2022-11-20 19:53:07,938 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-20 19:53:07,939 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:53:07,939 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:53:07,939 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:53:07,939 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:53:07,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:07,964 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 [2022-11-20 19:53:08,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:53:08,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:53:08,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:53:08,121 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 19:53:08,121 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 84 treesize of output 83 [2022-11-20 19:53:08,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:53:08,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:53:08,230 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-20 19:53:08,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-20 19:53:08,597 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:53:11,215 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3694#(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_main_~i~1#1|) (<= 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|) (<= 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|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_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 [2022-11-20 19:53:11,215 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:53:11,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:53:11,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 25 [2022-11-20 19:53:11,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913967523] [2022-11-20 19:53:11,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 19:53:11,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 19:53:11,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:53:11,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 19:53:11,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1217, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 19:53:11,217 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 26 states, 25 states have (on average 3.16) internal successors, (79), 26 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:53:11,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:53:11,493 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2022-11-20 19:53:11,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 19:53:11,494 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.16) internal successors, (79), 26 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-20 19:53:11,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:53:11,494 INFO L225 Difference]: With dead ends: 51 [2022-11-20 19:53:11,494 INFO L226 Difference]: Without dead ends: 48 [2022-11-20 19:53:11,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=300, Invalid=1592, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 19:53:11,496 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 168 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:53:11,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 59 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:53:11,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-20 19:53:11,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-11-20 19:53:11,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 46 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) [2022-11-20 19:53:11,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2022-11-20 19:53:11,498 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 36 [2022-11-20 19:53:11,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:53:11,498 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2022-11-20 19:53:11,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.16) internal successors, (79), 26 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:53:11,499 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2022-11-20 19:53:11,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 19:53:11,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:53:11,500 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-20 19:53:11,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-20 19:53:11,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-20 19:53:11,705 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 19:53:11,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:53:11,706 INFO L85 PathProgramCache]: Analyzing trace with hash 738921305, now seen corresponding path program 6 times [2022-11-20 19:53:11,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:53:11,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406473804] [2022-11-20 19:53:11,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:53:11,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:53:11,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:53:12,323 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 19:53:12,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:53:12,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406473804] [2022-11-20 19:53:12,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406473804] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:53:12,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156912904] [2022-11-20 19:53:12,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 19:53:12,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:53:12,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:53:12,325 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:53:12,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 19:53:12,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 19:53:12,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:53:12,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-20 19:53:12,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:53:12,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:53:13,131 INFO L321 Elim1Store]: treesize reduction 24, result has 35.1 percent of original size [2022-11-20 19:53:13,131 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 33 [2022-11-20 19:53:13,136 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 19:53:13,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:53:13,588 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:53:13,588 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 95 treesize of output 95 [2022-11-20 19:53:13,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-11-20 19:53:13,633 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:53:13,633 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 39 treesize of output 39 [2022-11-20 19:53:13,790 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 19:53:13,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156912904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:53:13,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1513468576] [2022-11-20 19:53:13,791 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-20 19:53:13,791 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:53:13,791 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:53:13,792 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:53:13,792 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:53:13,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:13,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-20 19:53:13,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:53:13,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:53:13,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:53:13,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:53:14,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:53:14,072 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-20 19:53:14,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-20 19:53:14,314 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:53:16,165 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4074#(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_main_~i~1#1|) (<= 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_~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|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |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|) (<= 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 [2022-11-20 19:53:16,165 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:53:16,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:53:16,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 16] total 36 [2022-11-20 19:53:16,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687865807] [2022-11-20 19:53:16,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 19:53:16,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 19:53:16,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:53:16,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 19:53:16,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2017, Unknown=0, NotChecked=0, Total=2162 [2022-11-20 19:53:16,167 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 36 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:53:17,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:53:17,455 INFO L93 Difference]: Finished difference Result 123 states and 126 transitions. [2022-11-20 19:53:17,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-20 19:53:17,455 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 36 states have internal predecessors, (90), 0 states have call successors, (0), 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 38 [2022-11-20 19:53:17,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:53:17,456 INFO L225 Difference]: With dead ends: 123 [2022-11-20 19:53:17,456 INFO L226 Difference]: Without dead ends: 53 [2022-11-20 19:53:17,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 78 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=334, Invalid=4636, Unknown=0, NotChecked=0, Total=4970 [2022-11-20 19:53:17,458 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 45 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:53:17,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 147 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 346 Invalid, 0 Unknown, 145 Unchecked, 0.2s Time] [2022-11-20 19:53:17,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-20 19:53:17,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2022-11-20 19:53:17,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 50 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:53:17,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2022-11-20 19:53:17,460 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 38 [2022-11-20 19:53:17,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:53:17,460 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2022-11-20 19:53:17,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 36 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:53:17,461 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2022-11-20 19:53:17,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-20 19:53:17,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:53:17,461 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-20 19:53:17,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 19:53:17,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-20 19:53:17,668 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 19:53:17,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:53:17,668 INFO L85 PathProgramCache]: Analyzing trace with hash 151123247, now seen corresponding path program 7 times [2022-11-20 19:53:17,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:53:17,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753261544] [2022-11-20 19:53:17,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:53:17,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:53:17,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:53:18,056 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 19:53:18,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:53:18,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753261544] [2022-11-20 19:53:18,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753261544] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:53:18,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081192083] [2022-11-20 19:53:18,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 19:53:18,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:53:18,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:53:18,059 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:53:18,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 19:53:18,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:53:18,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 19:53:18,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:53:18,409 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 19:53:18,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:53:18,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 19:53:18,748 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 19:53:18,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081192083] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:53:18,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1546151244] [2022-11-20 19:53:18,749 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-20 19:53:18,749 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:53:18,750 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:53:18,750 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:53:18,750 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:53:18,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:18,782 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 [2022-11-20 19:53:18,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:53:18,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:53:18,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:53:18,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:53:18,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:53:19,028 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-20 19:53:19,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-20 19:53:19,290 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:53:20,906 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4585#(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_main_~i~1#1|) (<= 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_~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|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |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|) (<= 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 [2022-11-20 19:53:20,906 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:53:20,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:53:20,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 26 [2022-11-20 19:53:20,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974122216] [2022-11-20 19:53:20,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 19:53:20,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 19:53:20,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:53:20,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 19:53:20,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 19:53:20,908 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 28 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:53:21,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:53:21,294 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2022-11-20 19:53:21,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 19:53:21,294 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-20 19:53:21,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:53:21,295 INFO L225 Difference]: With dead ends: 62 [2022-11-20 19:53:21,295 INFO L226 Difference]: Without dead ends: 62 [2022-11-20 19:53:21,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=315, Invalid=1847, Unknown=0, NotChecked=0, Total=2162 [2022-11-20 19:53:21,296 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 349 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:53:21,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 68 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:53:21,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-20 19:53:21,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2022-11-20 19:53:21,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 50 states have (on average 1.1) internal successors, (55), 52 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:53:21,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2022-11-20 19:53:21,301 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 42 [2022-11-20 19:53:21,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:53:21,301 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2022-11-20 19:53:21,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:53:21,309 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2022-11-20 19:53:21,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 19:53:21,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:53:21,311 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-20 19:53:21,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 19:53:21,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-20 19:53:21,517 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 19:53:21,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:53:21,518 INFO L85 PathProgramCache]: Analyzing trace with hash 988273743, now seen corresponding path program 4 times [2022-11-20 19:53:21,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:53:21,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19955602] [2022-11-20 19:53:21,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:53:21,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:53:21,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:53:21,968 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 4 proven. 58 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 19:53:21,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:53:21,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19955602] [2022-11-20 19:53:21,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19955602] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:53:21,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253395308] [2022-11-20 19:53:21,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 19:53:21,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:53:21,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:53:21,970 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:53:21,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 19:53:22,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:53:22,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 19:53:22,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:53:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 19:53:22,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:53:22,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 19:53:22,589 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 19:53:22,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253395308] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:53:22,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1278780523] [2022-11-20 19:53:22,590 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-20 19:53:22,590 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:53:22,591 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:53:22,591 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:53:22,591 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:53:22,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:22,615 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 [2022-11-20 19:53:22,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:53:22,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:53:22,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:53:22,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:53:22,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:53:22,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:53:22,898 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-20 19:53:22,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-20 19:53:23,188 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:53:25,599 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5017#(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_main_~i~1#1|) (<= |ULTIMATE.start_main_#t~malloc12#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_#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|) (< (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ |ULTIMATE.start_cstrcmp_~s2#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~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_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~malloc13#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.offset|) (<= |ULTIMATE.start_cstrcmp_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.base|) (<= 0 |#NULL.offset|) (= |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 [2022-11-20 19:53:25,599 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:53:25,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:53:25,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 25 [2022-11-20 19:53:25,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673790846] [2022-11-20 19:53:25,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 19:53:25,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 19:53:25,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:53:25,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 19:53:25,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1162, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 19:53:25,602 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 26 states, 25 states have (on average 3.36) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:53:25,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:53:25,901 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2022-11-20 19:53:25,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 19:53:25,902 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.36) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-11-20 19:53:25,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:53:25,903 INFO L225 Difference]: With dead ends: 60 [2022-11-20 19:53:25,903 INFO L226 Difference]: Without dead ends: 57 [2022-11-20 19:53:25,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 99 SyntacticMatches, 10 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=289, Invalid=1603, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 19:53:25,904 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 233 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:53:25,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 72 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:53:25,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-20 19:53:25,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-11-20 19:53:25,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:53:25,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2022-11-20 19:53:25,907 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 45 [2022-11-20 19:53:25,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:53:25,907 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2022-11-20 19:53:25,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.36) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:53:25,908 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2022-11-20 19:53:25,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-20 19:53:25,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:53:25,908 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-20 19:53:25,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 19:53:26,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-20 19:53:26,114 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 19:53:26,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:53:26,114 INFO L85 PathProgramCache]: Analyzing trace with hash 543331840, now seen corresponding path program 8 times [2022-11-20 19:53:26,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:53:26,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219359374] [2022-11-20 19:53:26,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:53:26,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:53:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:53:26,834 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 17 proven. 54 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 19:53:26,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:53:26,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219359374] [2022-11-20 19:53:26,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219359374] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:53:26,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251158826] [2022-11-20 19:53:26,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 19:53:26,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:53:26,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:53:26,837 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:53:26,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 19:53:27,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 19:53:27,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:53:27,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-20 19:53:27,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:53:27,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 19:53:27,373 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 [2022-11-20 19:53:27,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-20 19:53:27,551 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 17 proven. 54 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 19:53:27,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:53:27,707 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:53:27,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-20 19:53:27,714 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:53:27,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-20 19:53:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 17 proven. 54 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 19:53:27,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251158826] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:53:27,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1700978971] [2022-11-20 19:53:27,976 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-20 19:53:27,976 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:53:27,977 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:53:27,977 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:53:27,977 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:53:28,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:28,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-20 19:53:28,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:53:28,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:53:28,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:53:28,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:53:28,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:53:28,260 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-20 19:53:28,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-20 19:53:28,503 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:53:30,235 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5463#(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_main_~i~1#1|) (<= 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_~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|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |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|) (<= 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 [2022-11-20 19:53:30,236 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:53:30,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:53:30,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 28 [2022-11-20 19:53:30,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837734167] [2022-11-20 19:53:30,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 19:53:30,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-20 19:53:30,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:53:30,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-20 19:53:30,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1426, Unknown=4, NotChecked=0, Total=1560 [2022-11-20 19:53:30,238 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:53:30,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:53:30,915 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2022-11-20 19:53:30,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 19:53:30,916 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-20 19:53:30,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:53:30,916 INFO L225 Difference]: With dead ends: 92 [2022-11-20 19:53:30,916 INFO L226 Difference]: Without dead ends: 59 [2022-11-20 19:53:30,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 113 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=263, Invalid=2385, Unknown=4, NotChecked=0, Total=2652 [2022-11-20 19:53:30,918 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 151 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 19:53:30,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 142 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 504 Invalid, 0 Unknown, 21 Unchecked, 0.3s Time] [2022-11-20 19:53:30,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-20 19:53:30,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-11-20 19:53:30,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 57 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:53:30,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2022-11-20 19:53:30,920 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 47 [2022-11-20 19:53:30,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:53:30,920 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2022-11-20 19:53:30,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:53:30,920 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2022-11-20 19:53:30,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-20 19:53:30,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:53:30,921 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-20 19:53:30,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 19:53:31,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:53:31,127 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 19:53:31,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:53:31,127 INFO L85 PathProgramCache]: Analyzing trace with hash 2052321713, now seen corresponding path program 9 times [2022-11-20 19:53:31,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:53:31,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882979899] [2022-11-20 19:53:31,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:53:31,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:53:31,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:53:31,592 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 9 proven. 71 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 19:53:31,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:53:31,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882979899] [2022-11-20 19:53:31,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882979899] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:53:31,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15142794] [2022-11-20 19:53:31,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 19:53:31,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:53:31,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:53:31,594 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:53:31,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbedbd17-42d4-4515-8316-3561e4c321c8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 19:53:31,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 19:53:31,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:53:31,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-20 19:53:31,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:53:31,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 19:53:34,727 INFO L321 Elim1Store]: treesize reduction 131, result has 66.0 percent of original size [2022-11-20 19:53:34,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 111 treesize of output 295 [2022-11-20 19:53:35,261 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 9 proven. 62 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 19:53:35,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:53:37,576 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:53:37,577 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 377 treesize of output 425 [2022-11-20 19:53:37,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2022-11-20 19:53:38,240 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:53:38,241 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 102 treesize of output 102 [2022-11-20 19:53:38,370 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 62 treesize of output 58 [2022-11-20 19:53:38,433 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 62 treesize of output 58 [2022-11-20 19:53:38,515 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 62 treesize of output 58 [2022-11-20 19:53:38,915 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 62 treesize of output 58 [2022-11-20 19:53:38,995 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:53:38,995 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 83 treesize of output 83 [2022-11-20 19:53:39,087 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 62 treesize of output 58 [2022-11-20 19:53:39,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2022-11-20 19:53:39,309 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:53:39,309 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 138 treesize of output 138 [2022-11-20 19:53:39,721 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 62 treesize of output 58 [2022-11-20 19:53:39,847 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:53:39,848 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 83 treesize of output 83 [2022-11-20 19:53:39,979 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 62 treesize of output 58 [2022-11-20 19:53:40,116 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:53:40,116 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 83 treesize of output 83 [2022-11-20 19:53:40,325 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:53:40,325 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 104 treesize of output 116 [2022-11-20 19:53:40,512 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:53:40,513 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 83 treesize of output 83 [2022-11-20 19:53:41,733 INFO L321 Elim1Store]: treesize reduction 10, result has 88.8 percent of original size [2022-11-20 19:53:41,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 301 treesize of output 311 [2022-11-20 19:53:45,271 INFO L321 Elim1Store]: treesize reduction 10, result has 75.6 percent of original size [2022-11-20 19:53:45,271 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 142 treesize of output 146 [2022-11-20 19:53:45,645 INFO L321 Elim1Store]: treesize reduction 20, result has 86.2 percent of original size [2022-11-20 19:53:45,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 236 treesize of output 314 [2022-11-20 19:53:53,099 INFO L321 Elim1Store]: treesize reduction 10, result has 88.8 percent of original size [2022-11-20 19:53:53,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 188 treesize of output 230 [2022-11-20 19:53:54,884 INFO L321 Elim1Store]: treesize reduction 10, result has 75.6 percent of original size [2022-11-20 19:53:54,884 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 153 treesize of output 157 [2022-11-20 19:53:55,499 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 186 treesize of output 150 [2022-11-20 19:53:55,897 INFO L321 Elim1Store]: treesize reduction 144, result has 0.7 percent of original size [2022-11-20 19:53:55,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 561 treesize of output 1 [2022-11-20 19:53:56,294 INFO L321 Elim1Store]: treesize reduction 10, result has 88.8 percent of original size [2022-11-20 19:53:56,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 451 treesize of output 443 [2022-11-20 19:54:05,666 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 166 treesize of output 142 [2022-11-20 19:54:05,848 INFO L321 Elim1Store]: treesize reduction 88, result has 1.1 percent of original size [2022-11-20 19:54:05,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 573 treesize of output 1 [2022-11-20 19:54:06,634 INFO L321 Elim1Store]: treesize reduction 88, result has 1.1 percent of original size [2022-11-20 19:54:06,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 346 treesize of output 1 [2022-11-20 19:54:06,697 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 137 treesize of output 117 [2022-11-20 19:54:06,828 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:54:06,828 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 180 treesize of output 190 [2022-11-20 19:54:07,403 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 148 treesize of output 128 [2022-11-20 19:54:07,773 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:54:07,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 3311 treesize of output 2825