./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5bf92ba2f935aadbe2c0ae3d366f72b4144ff6b8b5ce7c503e628d249b478be5 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:35:19,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:35:19,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:35:20,020 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:35:20,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:35:20,025 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:35:20,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:35:20,031 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:35:20,033 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:35:20,034 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:35:20,035 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:35:20,036 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:35:20,036 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:35:20,037 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:35:20,038 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:35:20,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:35:20,040 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:35:20,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:35:20,043 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:35:20,045 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:35:20,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:35:20,047 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:35:20,049 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:35:20,050 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:35:20,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:35:20,053 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:35:20,054 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:35:20,055 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:35:20,055 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:35:20,056 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:35:20,057 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:35:20,057 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:35:20,058 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:35:20,059 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:35:20,060 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:35:20,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:35:20,061 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:35:20,062 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:35:20,062 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:35:20,063 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:35:20,064 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:35:20,065 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 07:35:20,089 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:35:20,089 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:35:20,090 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:35:20,090 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:35:20,091 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:35:20,091 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:35:20,091 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:35:20,091 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:35:20,092 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:35:20,092 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:35:20,092 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:35:20,092 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:35:20,093 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:35:20,093 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:35:20,093 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:35:20,093 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:35:20,094 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:35:20,094 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:35:20,094 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 07:35:20,095 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 07:35:20,095 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:35:20,095 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:35:20,095 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 07:35:20,096 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:35:20,096 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:35:20,096 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:35:20,096 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 07:35:20,097 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 07:35:20,097 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 07:35:20,097 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:35:20,097 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:35:20,097 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:35:20,098 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:35:20,098 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:35:20,098 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:35:20,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:35:20,099 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:35:20,099 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:35:20,099 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:35:20,099 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:35:20,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:35:20,099 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:35:20,100 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_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bf92ba2f935aadbe2c0ae3d366f72b4144ff6b8b5ce7c503e628d249b478be5 [2022-11-19 07:35:20,423 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:35:20,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:35:20,450 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:35:20,451 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:35:20,452 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:35:20,453 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i [2022-11-19 07:35:20,543 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/data/6ceae3b2d/284e913311e54051929684e83788a853/FLAG033b45b47 [2022-11-19 07:35:21,197 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:35:21,198 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i [2022-11-19 07:35:21,209 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/data/6ceae3b2d/284e913311e54051929684e83788a853/FLAG033b45b47 [2022-11-19 07:35:21,442 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/data/6ceae3b2d/284e913311e54051929684e83788a853 [2022-11-19 07:35:21,447 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:35:21,450 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:35:21,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:35:21,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:35:21,458 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:35:21,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:35:21" (1/1) ... [2022-11-19 07:35:21,462 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d4f115c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:21, skipping insertion in model container [2022-11-19 07:35:21,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:35:21" (1/1) ... [2022-11-19 07:35:21,472 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:35:21,532 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:35:22,003 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i[24494,24507] [2022-11-19 07:35:22,011 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:35:22,026 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:35:22,108 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i[24494,24507] [2022-11-19 07:35:22,110 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:35:22,144 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:35:22,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:22 WrapperNode [2022-11-19 07:35:22,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:35:22,146 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:35:22,146 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:35:22,146 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:35:22,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:22" (1/1) ... [2022-11-19 07:35:22,188 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:22" (1/1) ... [2022-11-19 07:35:22,211 INFO L138 Inliner]: procedures = 129, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 132 [2022-11-19 07:35:22,211 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:35:22,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:35:22,212 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:35:22,212 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:35:22,222 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:22" (1/1) ... [2022-11-19 07:35:22,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:22" (1/1) ... [2022-11-19 07:35:22,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:22" (1/1) ... [2022-11-19 07:35:22,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:22" (1/1) ... [2022-11-19 07:35:22,237 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:22" (1/1) ... [2022-11-19 07:35:22,247 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:22" (1/1) ... [2022-11-19 07:35:22,251 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:22" (1/1) ... [2022-11-19 07:35:22,263 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:22" (1/1) ... [2022-11-19 07:35:22,265 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:35:22,266 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:35:22,266 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:35:22,267 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:35:22,268 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:22" (1/1) ... [2022-11-19 07:35:22,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:35:22,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:22,304 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:35:22,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:35:22,348 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2022-11-19 07:35:22,349 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2022-11-19 07:35:22,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:35:22,349 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2022-11-19 07:35:22,349 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2022-11-19 07:35:22,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:35:22,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:35:22,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 07:35:22,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 07:35:22,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:35:22,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 07:35:22,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:35:22,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:35:22,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:35:22,502 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:35:22,504 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:35:22,545 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2022-11-19 07:35:22,885 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:35:22,970 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:35:22,970 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-19 07:35:22,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:35:22 BoogieIcfgContainer [2022-11-19 07:35:22,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:35:22,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:35:22,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:35:22,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:35:22,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:35:21" (1/3) ... [2022-11-19 07:35:22,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16665e23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:35:22, skipping insertion in model container [2022-11-19 07:35:22,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:22" (2/3) ... [2022-11-19 07:35:22,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16665e23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:35:22, skipping insertion in model container [2022-11-19 07:35:22,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:35:22" (3/3) ... [2022-11-19 07:35:22,997 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-2.i [2022-11-19 07:35:23,019 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:35:23,019 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2022-11-19 07:35:23,096 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:35:23,114 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;@6ed59999, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:35:23,116 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2022-11-19 07:35:23,121 INFO L276 IsEmpty]: Start isEmpty. Operand has 71 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 65 states have internal predecessors, (77), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:35:23,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:35:23,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:23,156 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:23,157 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-19 07:35:23,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:23,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1885357236, now seen corresponding path program 1 times [2022-11-19 07:35:23,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:23,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893676370] [2022-11-19 07:35:23,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:23,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:23,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:35:23,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:23,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893676370] [2022-11-19 07:35:23,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893676370] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:35:23,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:35:23,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:35:23,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604635853] [2022-11-19 07:35:23,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:35:23,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 07:35:23,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:23,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 07:35:23,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 07:35:23,433 INFO L87 Difference]: Start difference. First operand has 71 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 65 states have internal predecessors, (77), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:35:23,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:23,491 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2022-11-19 07:35:23,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 07:35:23,494 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-19 07:35:23,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:23,502 INFO L225 Difference]: With dead ends: 71 [2022-11-19 07:35:23,503 INFO L226 Difference]: Without dead ends: 66 [2022-11-19 07:35:23,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 07:35:23,508 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:23,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:35:23,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-19 07:35:23,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-11-19 07:35:23,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 37 states have (on average 1.837837837837838) internal successors, (68), 61 states have internal predecessors, (68), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:35:23,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2022-11-19 07:35:23,580 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 11 [2022-11-19 07:35:23,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:23,580 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2022-11-19 07:35:23,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:35:23,582 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2022-11-19 07:35:23,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 07:35:23,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:23,584 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:23,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:35:23,584 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-19 07:35:23,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:23,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1266102301, now seen corresponding path program 1 times [2022-11-19 07:35:23,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:23,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503379920] [2022-11-19 07:35:23,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:23,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:23,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:35:23,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:23,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503379920] [2022-11-19 07:35:23,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503379920] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:35:23,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:35:23,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:35:23,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122855681] [2022-11-19 07:35:23,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:35:23,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:35:23,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:23,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:35:23,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:35:23,763 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:35:23,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:23,890 INFO L93 Difference]: Finished difference Result 117 states and 133 transitions. [2022-11-19 07:35:23,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:35:23,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-11-19 07:35:23,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:23,893 INFO L225 Difference]: With dead ends: 117 [2022-11-19 07:35:23,893 INFO L226 Difference]: Without dead ends: 117 [2022-11-19 07:35:23,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:35:23,895 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 54 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:23,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 108 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:35:23,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-19 07:35:23,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 65. [2022-11-19 07:35:23,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 60 states have internal predecessors, (67), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:35:23,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2022-11-19 07:35:23,908 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 12 [2022-11-19 07:35:23,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:23,908 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2022-11-19 07:35:23,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:35:23,909 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2022-11-19 07:35:23,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 07:35:23,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:23,910 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:23,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:35:23,910 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-19 07:35:23,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:23,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1266102302, now seen corresponding path program 1 times [2022-11-19 07:35:23,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:23,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700634518] [2022-11-19 07:35:23,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:23,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:23,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:24,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:35:24,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:24,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700634518] [2022-11-19 07:35:24,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700634518] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:35:24,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:35:24,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:35:24,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071917502] [2022-11-19 07:35:24,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:35:24,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:35:24,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:24,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:35:24,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:35:24,048 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:35:24,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:24,156 INFO L93 Difference]: Finished difference Result 118 states and 133 transitions. [2022-11-19 07:35:24,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:35:24,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-11-19 07:35:24,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:24,158 INFO L225 Difference]: With dead ends: 118 [2022-11-19 07:35:24,159 INFO L226 Difference]: Without dead ends: 118 [2022-11-19 07:35:24,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:35:24,160 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 56 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:24,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 90 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:35:24,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-19 07:35:24,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 64. [2022-11-19 07:35:24,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 59 states have internal predecessors, (66), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:35:24,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2022-11-19 07:35:24,175 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 12 [2022-11-19 07:35:24,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:24,176 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2022-11-19 07:35:24,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:35:24,176 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2022-11-19 07:35:24,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 07:35:24,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:24,177 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:24,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:35:24,178 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-19 07:35:24,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:24,179 INFO L85 PathProgramCache]: Analyzing trace with hash -180423816, now seen corresponding path program 1 times [2022-11-19 07:35:24,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:24,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220337669] [2022-11-19 07:35:24,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:24,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:24,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:24,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:35:24,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:24,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220337669] [2022-11-19 07:35:24,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220337669] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:35:24,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701346323] [2022-11-19 07:35:24,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:24,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:24,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:24,359 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:35:24,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:35:24,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:24,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:35:24,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:24,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:35:24,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:35:24,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701346323] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:35:24,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:35:24,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-19 07:35:24,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073610285] [2022-11-19 07:35:24,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:35:24,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:35:24,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:24,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:35:24,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:35:24,622 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:35:24,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:24,793 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2022-11-19 07:35:24,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:35:24,794 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-11-19 07:35:24,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:24,797 INFO L225 Difference]: With dead ends: 66 [2022-11-19 07:35:24,797 INFO L226 Difference]: Without dead ends: 66 [2022-11-19 07:35:24,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:35:24,807 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 1 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:24,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 296 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:35:24,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-19 07:35:24,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-11-19 07:35:24,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 61 states have internal predecessors, (68), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:35:24,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2022-11-19 07:35:24,813 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 20 [2022-11-19 07:35:24,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:24,813 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2022-11-19 07:35:24,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:35:24,814 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2022-11-19 07:35:24,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 07:35:24,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:24,815 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:24,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:35:25,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-19 07:35:25,021 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-19 07:35:25,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:25,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1997525453, now seen corresponding path program 1 times [2022-11-19 07:35:25,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:25,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007791933] [2022-11-19 07:35:25,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:25,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:25,296 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:35:25,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:25,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007791933] [2022-11-19 07:35:25,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007791933] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:35:25,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116475421] [2022-11-19 07:35:25,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:25,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:25,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:25,312 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:35:25,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:35:25,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:25,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:35:25,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:25,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:35:25,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:35:25,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:35:25,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116475421] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:35:25,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [686592535] [2022-11-19 07:35:25,808 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-19 07:35:25,808 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:35:25,813 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:35:25,819 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:35:25,820 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:35:25,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:25,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:25,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:35:26,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:26,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:26,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:26,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:26,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:26,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-19 07:35:26,113 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 11 treesize of output 7 [2022-11-19 07:35:26,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:26,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:26,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 07:35:26,159 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 11 treesize of output 7 [2022-11-19 07:35:26,472 INFO L321 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2022-11-19 07:35:26,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 244 treesize of output 251 [2022-11-19 07:35:26,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:26,744 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:35:26,745 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 1 case distinctions, treesize of input 263 treesize of output 262 [2022-11-19 07:35:26,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:26,785 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-19 07:35:26,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 287 treesize of output 270 [2022-11-19 07:35:26,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:26,816 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-19 07:35:26,817 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 1 case distinctions, treesize of input 283 treesize of output 282 [2022-11-19 07:35:26,907 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 6 treesize of output 5 [2022-11-19 07:35:26,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-19 07:35:26,977 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 11 treesize of output 7 [2022-11-19 07:35:26,985 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 11 treesize of output 7 [2022-11-19 07:35:26,994 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 15 treesize of output 1 [2022-11-19 07:35:27,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-19 07:35:27,056 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 6 treesize of output 5 [2022-11-19 07:35:27,282 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 65 for LOIs [2022-11-19 07:35:27,416 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:35:29,672 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '939#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_sll_create_~head~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_create_#res#1.offset|) (<= (+ |ULTIMATE.start_sll_create_~len#1| 1) 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (not (= (select |#valid| |ULTIMATE.start_main_~#s~0#1.base|) 1)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~len~2#1| 2) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_create_#res#1.base|) (<= 2 |ULTIMATE.start_main_~len~2#1|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-19 07:35:29,672 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:35:29,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:35:29,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-11-19 07:35:29,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519685166] [2022-11-19 07:35:29,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:35:29,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 07:35:29,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:29,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 07:35:29,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2022-11-19 07:35:29,675 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand has 15 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 13 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:35:30,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:30,005 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2022-11-19 07:35:30,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 07:35:30,007 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 13 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 24 [2022-11-19 07:35:30,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:30,010 INFO L225 Difference]: With dead ends: 84 [2022-11-19 07:35:30,010 INFO L226 Difference]: Without dead ends: 84 [2022-11-19 07:35:30,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 07:35:30,011 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 12 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:30,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 405 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:35:30,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-19 07:35:30,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 70. [2022-11-19 07:35:30,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 43 states have (on average 1.6744186046511629) internal successors, (72), 65 states have internal predecessors, (72), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:35:30,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2022-11-19 07:35:30,018 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 24 [2022-11-19 07:35:30,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:30,018 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2022-11-19 07:35:30,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 13 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:35:30,019 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2022-11-19 07:35:30,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 07:35:30,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:30,020 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:30,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:35:30,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:30,228 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-19 07:35:30,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:30,228 INFO L85 PathProgramCache]: Analyzing trace with hash 398431086, now seen corresponding path program 2 times [2022-11-19 07:35:30,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:30,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905961027] [2022-11-19 07:35:30,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:30,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:30,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:30,471 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:35:30,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:30,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905961027] [2022-11-19 07:35:30,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905961027] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:35:30,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505177842] [2022-11-19 07:35:30,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:35:30,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:30,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:30,474 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:35:30,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:35:30,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 07:35:30,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:35:30,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:35:30,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:30,607 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:35:30,677 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:35:30,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 07:35:30,696 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:35:30,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 07:35:30,753 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:35:30,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:35:30,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505177842] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:35:30,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:35:30,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-19 07:35:30,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105246370] [2022-11-19 07:35:30,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:35:30,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:35:30,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:30,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:35:30,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:35:30,756 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:35:30,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:30,812 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2022-11-19 07:35:30,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:35:30,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-11-19 07:35:30,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:30,813 INFO L225 Difference]: With dead ends: 83 [2022-11-19 07:35:30,814 INFO L226 Difference]: Without dead ends: 83 [2022-11-19 07:35:30,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:35:30,815 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 53 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:30,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 67 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2022-11-19 07:35:30,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-19 07:35:30,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2022-11-19 07:35:30,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 67 states have internal predecessors, (75), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:35:30,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2022-11-19 07:35:30,836 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 28 [2022-11-19 07:35:30,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:30,836 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2022-11-19 07:35:30,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:35:30,837 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2022-11-19 07:35:30,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 07:35:30,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:30,838 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:30,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:35:31,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:31,039 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-19 07:35:31,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:31,039 INFO L85 PathProgramCache]: Analyzing trace with hash 398431087, now seen corresponding path program 1 times [2022-11-19 07:35:31,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:31,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849304636] [2022-11-19 07:35:31,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:31,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:31,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:31,222 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:35:31,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:31,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849304636] [2022-11-19 07:35:31,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849304636] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:35:31,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162576450] [2022-11-19 07:35:31,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:31,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:31,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:31,231 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:35:31,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:35:31,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:31,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 07:35:31,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:31,343 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:35:31,349 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:35:31,387 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:35:31,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 07:35:31,409 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:35:31,409 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 11 treesize of output 11 [2022-11-19 07:35:31,493 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:35:31,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 07:35:31,555 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 11 treesize of output 7 [2022-11-19 07:35:31,614 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:35:31,614 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 07:35:31,687 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:35:31,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:35:31,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-11-19 07:35:32,040 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:35:32,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162576450] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:35:32,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [153927296] [2022-11-19 07:35:32,042 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-19 07:35:32,043 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:35:32,043 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:35:32,043 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:35:32,044 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:35:32,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:32,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:32,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:35:32,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:32,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:32,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:32,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:32,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:32,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-19 07:35:32,166 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 11 treesize of output 7 [2022-11-19 07:35:32,174 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 11 treesize of output 7 [2022-11-19 07:35:32,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:32,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:32,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 07:35:32,354 INFO L321 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2022-11-19 07:35:32,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 244 treesize of output 251 [2022-11-19 07:35:32,565 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:35:32,565 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 1 case distinctions, treesize of input 260 treesize of output 259 [2022-11-19 07:35:32,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:32,596 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-19 07:35:32,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 304 treesize of output 287 [2022-11-19 07:35:32,623 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-19 07:35:32,624 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 1 case distinctions, treesize of input 300 treesize of output 299 [2022-11-19 07:35:32,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-19 07:35:32,704 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 6 treesize of output 5 [2022-11-19 07:35:32,720 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 11 treesize of output 7 [2022-11-19 07:35:32,729 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 11 treesize of output 7 [2022-11-19 07:35:32,736 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 15 treesize of output 1 [2022-11-19 07:35:32,760 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 6 treesize of output 5 [2022-11-19 07:35:32,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-19 07:35:32,922 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 65 for LOIs [2022-11-19 07:35:33,068 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:35:35,187 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1541#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_sll_create_~head~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_create_#res#1.offset|) (<= (+ |ULTIMATE.start_sll_create_~len#1| 1) 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (< (select |#length| |ULTIMATE.start_main_~#s~0#1.base|) (+ |ULTIMATE.start_main_~#s~0#1.offset| 4)) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~len~2#1| 2) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_create_#res#1.base|) (<= 2 |ULTIMATE.start_main_~len~2#1|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-19 07:35:35,188 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:35:35,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:35:35,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 7] total 15 [2022-11-19 07:35:35,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791396325] [2022-11-19 07:35:35,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:35:35,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 07:35:35,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:35,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 07:35:35,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-11-19 07:35:35,191 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand has 16 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 16 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:35:35,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:35,467 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2022-11-19 07:35:35,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:35:35,468 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 16 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 28 [2022-11-19 07:35:35,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:35,469 INFO L225 Difference]: With dead ends: 81 [2022-11-19 07:35:35,469 INFO L226 Difference]: Without dead ends: 81 [2022-11-19 07:35:35,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2022-11-19 07:35:35,470 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 220 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:35,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 216 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 180 Invalid, 0 Unknown, 55 Unchecked, 0.2s Time] [2022-11-19 07:35:35,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-19 07:35:35,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2022-11-19 07:35:35,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.553191489361702) internal successors, (73), 65 states have internal predecessors, (73), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:35:35,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2022-11-19 07:35:35,475 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 28 [2022-11-19 07:35:35,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:35,476 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2022-11-19 07:35:35,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 16 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:35:35,476 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2022-11-19 07:35:35,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 07:35:35,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:35,477 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:35,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:35:35,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:35,678 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-19 07:35:35,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:35,678 INFO L85 PathProgramCache]: Analyzing trace with hash 640267330, now seen corresponding path program 1 times [2022-11-19 07:35:35,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:35,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489465537] [2022-11-19 07:35:35,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:35,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:35,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:35,832 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:35:35,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:35,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489465537] [2022-11-19 07:35:35,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489465537] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:35:35,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:35:35,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:35:35,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639739206] [2022-11-19 07:35:35,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:35:35,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:35:35,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:35,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:35:35,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:35:35,836 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:35:35,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:35,980 INFO L93 Difference]: Finished difference Result 133 states and 149 transitions. [2022-11-19 07:35:35,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:35:35,981 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-11-19 07:35:35,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:35,983 INFO L225 Difference]: With dead ends: 133 [2022-11-19 07:35:35,983 INFO L226 Difference]: Without dead ends: 133 [2022-11-19 07:35:35,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:35:35,984 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 164 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:35,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 130 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:35:35,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-19 07:35:35,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 75. [2022-11-19 07:35:35,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 51 states have (on average 1.5686274509803921) internal successors, (80), 69 states have internal predecessors, (80), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:35:35,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2022-11-19 07:35:35,991 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 30 [2022-11-19 07:35:35,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:35,991 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2022-11-19 07:35:35,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:35:35,992 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2022-11-19 07:35:35,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 07:35:35,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:35,993 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:35,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:35:35,993 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-19 07:35:35,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:35,994 INFO L85 PathProgramCache]: Analyzing trace with hash 640267331, now seen corresponding path program 1 times [2022-11-19 07:35:35,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:35,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676417581] [2022-11-19 07:35:35,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:35,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:36,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:36,222 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:35:36,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:36,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676417581] [2022-11-19 07:35:36,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676417581] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:35:36,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:35:36,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:35:36,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282763028] [2022-11-19 07:35:36,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:35:36,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:35:36,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:36,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:35:36,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:35:36,225 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:35:36,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:36,434 INFO L93 Difference]: Finished difference Result 124 states and 138 transitions. [2022-11-19 07:35:36,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:35:36,435 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-11-19 07:35:36,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:36,436 INFO L225 Difference]: With dead ends: 124 [2022-11-19 07:35:36,436 INFO L226 Difference]: Without dead ends: 124 [2022-11-19 07:35:36,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:35:36,439 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 282 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:36,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 126 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:35:36,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-19 07:35:36,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 75. [2022-11-19 07:35:36,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 69 states have internal predecessors, (79), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:35:36,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2022-11-19 07:35:36,453 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 30 [2022-11-19 07:35:36,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:36,453 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2022-11-19 07:35:36,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:35:36,454 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2022-11-19 07:35:36,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-19 07:35:36,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:36,461 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:36,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 07:35:36,461 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-19 07:35:36,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:36,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1626473775, now seen corresponding path program 1 times [2022-11-19 07:35:36,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:36,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222378380] [2022-11-19 07:35:36,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:36,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:35:36,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:36,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222378380] [2022-11-19 07:35:36,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222378380] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:35:36,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:35:36,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:35:36,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14434201] [2022-11-19 07:35:36,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:35:36,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:35:36,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:36,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:35:36,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:35:36,571 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:35:36,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:36,678 INFO L93 Difference]: Finished difference Result 108 states and 121 transitions. [2022-11-19 07:35:36,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:35:36,679 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2022-11-19 07:35:36,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:36,680 INFO L225 Difference]: With dead ends: 108 [2022-11-19 07:35:36,680 INFO L226 Difference]: Without dead ends: 108 [2022-11-19 07:35:36,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:35:36,681 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 223 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:36,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 167 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:35:36,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-19 07:35:36,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2022-11-19 07:35:36,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 69 states have internal predecessors, (78), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:35:36,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2022-11-19 07:35:36,686 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 31 [2022-11-19 07:35:36,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:36,686 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2022-11-19 07:35:36,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:35:36,687 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2022-11-19 07:35:36,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-19 07:35:36,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:36,688 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:36,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 07:35:36,688 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-19 07:35:36,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:36,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1116640766, now seen corresponding path program 1 times [2022-11-19 07:35:36,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:36,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445553971] [2022-11-19 07:35:36,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:36,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:36,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:36,943 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:35:36,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:36,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445553971] [2022-11-19 07:35:36,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445553971] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:35:36,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949728376] [2022-11-19 07:35:36,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:36,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:36,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:36,946 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:35:36,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:35:37,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:37,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-19 07:35:37,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:37,064 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:35:37,089 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:35:37,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 07:35:37,128 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 11 treesize of output 7 [2022-11-19 07:35:37,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 07:35:37,407 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-11-19 07:35:37,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2022-11-19 07:35:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:35:37,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:35:37,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-11-19 07:35:37,512 INFO L321 Elim1Store]: treesize reduction 11, result has 64.5 percent of original size [2022-11-19 07:35:37,513 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 107 [2022-11-19 07:35:37,693 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:35:37,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949728376] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:35:37,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2103255483] [2022-11-19 07:35:37,697 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-19 07:35:37,697 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:35:37,697 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:35:37,697 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:35:37,698 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:35:37,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:37,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:37,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:35:37,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:37,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:37,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:37,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:37,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:37,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-19 07:35:37,832 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 11 treesize of output 7 [2022-11-19 07:35:37,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:37,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:37,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 07:35:37,858 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 11 treesize of output 7 [2022-11-19 07:35:38,007 INFO L321 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2022-11-19 07:35:38,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 244 treesize of output 251 [2022-11-19 07:35:38,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:38,250 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:35:38,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 263 treesize of output 262 [2022-11-19 07:35:38,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:38,285 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-19 07:35:38,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 287 treesize of output 270 [2022-11-19 07:35:38,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:38,315 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-19 07:35:38,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 283 treesize of output 282 [2022-11-19 07:35:38,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-19 07:35:38,386 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 6 treesize of output 5 [2022-11-19 07:35:38,402 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 15 treesize of output 1 [2022-11-19 07:35:38,408 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 11 treesize of output 7 [2022-11-19 07:35:38,417 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 11 treesize of output 7 [2022-11-19 07:35:38,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-19 07:35:38,447 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 6 treesize of output 5 [2022-11-19 07:35:38,722 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 65 for LOIs [2022-11-19 07:35:38,823 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:35:41,036 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2544#(and (= |ULTIMATE.start_main_~len~2#1| 2) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_sll_length_~len~0#1|) (not (= (select |#valid| |ULTIMATE.start_sll_length_~head#1.base|) 1)) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= (+ |ULTIMATE.start_sll_create_~len#1| 1) 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-19 07:35:41,037 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:35:41,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:35:41,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 15 [2022-11-19 07:35:41,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715529335] [2022-11-19 07:35:41,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:35:41,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 07:35:41,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:41,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 07:35:41,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2022-11-19 07:35:41,039 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 16 states, 15 states have (on average 3.2) internal successors, (48), 16 states have internal predecessors, (48), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:35:41,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:41,395 INFO L93 Difference]: Finished difference Result 109 states and 122 transitions. [2022-11-19 07:35:41,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 07:35:41,397 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.2) internal successors, (48), 16 states have internal predecessors, (48), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2022-11-19 07:35:41,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:41,399 INFO L225 Difference]: With dead ends: 109 [2022-11-19 07:35:41,399 INFO L226 Difference]: Without dead ends: 109 [2022-11-19 07:35:41,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=157, Invalid=1249, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 07:35:41,400 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 48 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:41,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 411 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 272 Invalid, 0 Unknown, 224 Unchecked, 0.2s Time] [2022-11-19 07:35:41,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-19 07:35:41,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 77. [2022-11-19 07:35:41,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 53 states have (on average 1.5471698113207548) internal successors, (82), 71 states have internal predecessors, (82), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:35:41,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2022-11-19 07:35:41,405 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 32 [2022-11-19 07:35:41,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:41,405 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2022-11-19 07:35:41,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.2) internal successors, (48), 16 states have internal predecessors, (48), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:35:41,406 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2022-11-19 07:35:41,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-19 07:35:41,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:41,407 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:41,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:35:41,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 07:35:41,612 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-19 07:35:41,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:41,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1116640767, now seen corresponding path program 1 times [2022-11-19 07:35:41,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:41,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876860530] [2022-11-19 07:35:41,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:41,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:41,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:42,063 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:35:42,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:42,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876860530] [2022-11-19 07:35:42,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876860530] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:35:42,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326671595] [2022-11-19 07:35:42,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:42,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:42,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:42,065 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:35:42,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:35:42,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:42,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-19 07:35:42,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:42,181 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:35:42,261 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:35:42,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 07:35:42,276 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:35:42,277 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 11 treesize of output 11 [2022-11-19 07:35:42,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:35:42,328 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 11 treesize of output 7 [2022-11-19 07:35:42,651 INFO L321 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2022-11-19 07:35:42,652 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 54 [2022-11-19 07:35:42,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:42,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 07:35:42,718 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:35:42,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:35:43,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326671595] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:35:43,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [366650951] [2022-11-19 07:35:43,003 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-19 07:35:43,003 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:35:43,003 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:35:43,004 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:35:43,004 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:35:43,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:43,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:43,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:35:43,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:43,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:43,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:43,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:43,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:43,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-19 07:35:43,107 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 11 treesize of output 7 [2022-11-19 07:35:43,115 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 11 treesize of output 7 [2022-11-19 07:35:43,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:43,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:43,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 07:35:43,269 INFO L321 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2022-11-19 07:35:43,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 244 treesize of output 251 [2022-11-19 07:35:43,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:43,449 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-19 07:35:43,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 264 treesize of output 247 [2022-11-19 07:35:43,477 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:35:43,477 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 1 case distinctions, treesize of input 260 treesize of output 259 [2022-11-19 07:35:43,501 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-19 07:35:43,502 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 1 case distinctions, treesize of input 300 treesize of output 299 [2022-11-19 07:35:43,575 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 6 treesize of output 5 [2022-11-19 07:35:43,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-19 07:35:43,597 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 15 treesize of output 1 [2022-11-19 07:35:43,607 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 11 treesize of output 7 [2022-11-19 07:35:43,615 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 11 treesize of output 7 [2022-11-19 07:35:43,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-19 07:35:43,646 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 6 treesize of output 5 [2022-11-19 07:35:43,935 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 65 for LOIs [2022-11-19 07:35:44,051 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:35:46,331 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2899#(and (= |ULTIMATE.start_main_~len~2#1| 2) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_sll_length_~len~0#1|) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= (+ |ULTIMATE.start_sll_create_~len#1| 1) 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (or (not (<= 0 |ULTIMATE.start_sll_length_~head#1.offset|)) (not (<= (+ |ULTIMATE.start_sll_length_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_length_~head#1.base|)))) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-19 07:35:46,331 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:35:46,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:35:46,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2022-11-19 07:35:46,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011702524] [2022-11-19 07:35:46,332 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:35:46,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 07:35:46,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:46,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 07:35:46,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 07:35:46,333 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand has 17 states, 16 states have (on average 2.8125) internal successors, (45), 17 states have internal predecessors, (45), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:35:47,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:47,097 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2022-11-19 07:35:47,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 07:35:47,098 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.8125) internal successors, (45), 17 states have internal predecessors, (45), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2022-11-19 07:35:47,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:47,099 INFO L225 Difference]: With dead ends: 94 [2022-11-19 07:35:47,099 INFO L226 Difference]: Without dead ends: 94 [2022-11-19 07:35:47,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=198, Invalid=1872, Unknown=0, NotChecked=0, Total=2070 [2022-11-19 07:35:47,101 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 38 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:47,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 580 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 376 Invalid, 0 Unknown, 154 Unchecked, 0.3s Time] [2022-11-19 07:35:47,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-19 07:35:47,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 77. [2022-11-19 07:35:47,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 53 states have (on average 1.528301886792453) internal successors, (81), 71 states have internal predecessors, (81), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:35:47,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2022-11-19 07:35:47,106 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 32 [2022-11-19 07:35:47,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:47,106 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2022-11-19 07:35:47,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.8125) internal successors, (45), 17 states have internal predecessors, (45), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:35:47,107 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2022-11-19 07:35:47,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-19 07:35:47,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:47,108 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:47,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-19 07:35:47,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:47,313 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-19 07:35:47,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:47,314 INFO L85 PathProgramCache]: Analyzing trace with hash 256200853, now seen corresponding path program 1 times [2022-11-19 07:35:47,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:47,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284968150] [2022-11-19 07:35:47,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:47,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:47,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:47,547 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:35:47,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:47,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284968150] [2022-11-19 07:35:47,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284968150] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:35:47,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365363274] [2022-11-19 07:35:47,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:47,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:47,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:47,549 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:35:47,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:35:47,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:47,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-19 07:35:47,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:47,712 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 11 treesize of output 7 [2022-11-19 07:35:47,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 07:35:47,929 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:35:47,929 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-11-19 07:35:47,933 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:35:47,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:35:47,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-11-19 07:35:48,026 INFO L321 Elim1Store]: treesize reduction 11, result has 64.5 percent of original size [2022-11-19 07:35:48,027 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 132 [2022-11-19 07:35:48,075 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:35:48,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365363274] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:35:48,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [812957500] [2022-11-19 07:35:48,078 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-19 07:35:48,078 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:35:48,078 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:35:48,078 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:35:48,079 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:35:48,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:48,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:48,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:35:48,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:48,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:48,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:48,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:48,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:48,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-19 07:35:48,199 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 11 treesize of output 7 [2022-11-19 07:35:48,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:48,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:48,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 07:35:48,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:35:48,376 INFO L321 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2022-11-19 07:35:48,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 244 treesize of output 251 [2022-11-19 07:35:48,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:48,557 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-19 07:35:48,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 267 treesize of output 250 [2022-11-19 07:35:48,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:48,585 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:35:48,585 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 1 case distinctions, treesize of input 263 treesize of output 262 [2022-11-19 07:35:48,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:48,613 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-19 07:35:48,614 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 1 case distinctions, treesize of input 283 treesize of output 282 [2022-11-19 07:35:48,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-19 07:35:48,676 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 6 treesize of output 5 [2022-11-19 07:35:48,690 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 11 treesize of output 7 [2022-11-19 07:35:48,697 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 15 treesize of output 1 [2022-11-19 07:35:48,703 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 11 treesize of output 7 [2022-11-19 07:35:48,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-19 07:35:48,732 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 6 treesize of output 5 [2022-11-19 07:35:48,998 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 65 for LOIs [2022-11-19 07:35:49,090 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:35:51,323 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3315#(and (= |ULTIMATE.start_sll_length_~head#1.base| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= |ULTIMATE.start_sll_length_#res#1| 2147483647) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= (+ |ULTIMATE.start_sll_create_~len#1| 1) 0) (<= 0 |ULTIMATE.start_sll_length_~len~0#1|) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (not (= (+ |ULTIMATE.start_main_~len~2#1| |ULTIMATE.start_main_~k~0#1|) |ULTIMATE.start_sll_length_#res#1|)) (= |ULTIMATE.start_main_~k~0#1| 0) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |#NULL.offset| 0) (= |ULTIMATE.start_sll_length_~head#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_sll_length_~len~0#1| |ULTIMATE.start_sll_length_#res#1|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_main_~len~2#1| 2) (<= 2 |ULTIMATE.start_main_~len~2#1|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-19 07:35:51,324 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:35:51,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:35:51,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 14 [2022-11-19 07:35:51,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623414710] [2022-11-19 07:35:51,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:35:51,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 07:35:51,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:51,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 07:35:51,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2022-11-19 07:35:51,326 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:35:51,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:51,539 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2022-11-19 07:35:51,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:35:51,539 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-11-19 07:35:51,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:51,540 INFO L225 Difference]: With dead ends: 93 [2022-11-19 07:35:51,540 INFO L226 Difference]: Without dead ends: 93 [2022-11-19 07:35:51,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 07:35:51,542 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 67 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:51,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 466 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 131 Invalid, 0 Unknown, 100 Unchecked, 0.1s Time] [2022-11-19 07:35:51,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-19 07:35:51,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2022-11-19 07:35:51,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 53 states have (on average 1.509433962264151) internal successors, (80), 71 states have internal predecessors, (80), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:35:51,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2022-11-19 07:35:51,546 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 33 [2022-11-19 07:35:51,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:51,547 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2022-11-19 07:35:51,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:35:51,547 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2022-11-19 07:35:51,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-19 07:35:51,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:51,548 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:51,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:35:51,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 07:35:51,759 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-19 07:35:51,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:51,760 INFO L85 PathProgramCache]: Analyzing trace with hash -649987910, now seen corresponding path program 2 times [2022-11-19 07:35:51,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:51,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591259578] [2022-11-19 07:35:51,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:51,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:51,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:52,244 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:35:52,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:52,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591259578] [2022-11-19 07:35:52,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591259578] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:35:52,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084335485] [2022-11-19 07:35:52,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:35:52,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:52,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:52,246 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:35:52,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:35:52,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 07:35:52,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:35:52,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-19 07:35:52,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:52,402 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:35:52,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:35:52,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:35:52,487 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:35:52,487 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 11 treesize of output 11 [2022-11-19 07:35:52,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-19 07:35:52,545 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 23 treesize of output 22 [2022-11-19 07:35:53,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:53,102 INFO L321 Elim1Store]: treesize reduction 76, result has 26.9 percent of original size [2022-11-19 07:35:53,102 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 104 treesize of output 79 [2022-11-19 07:35:53,138 INFO L321 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2022-11-19 07:35:53,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 25 [2022-11-19 07:35:53,145 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:35:53,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:35:53,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084335485] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:35:53,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [574841229] [2022-11-19 07:35:53,510 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-19 07:35:53,510 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:35:53,511 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:35:53,511 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:35:53,511 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:35:53,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:53,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:53,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:35:53,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:53,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:53,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:53,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:53,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:53,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-19 07:35:53,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:53,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:53,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 07:35:53,625 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 11 treesize of output 7 [2022-11-19 07:35:53,633 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 11 treesize of output 7 [2022-11-19 07:35:53,776 INFO L321 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2022-11-19 07:35:53,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 244 treesize of output 251 [2022-11-19 07:35:53,956 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:35:53,957 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 1 case distinctions, treesize of input 260 treesize of output 259 [2022-11-19 07:35:53,987 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:35:53,987 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 1 case distinctions, treesize of input 268 treesize of output 267 [2022-11-19 07:35:54,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:54,016 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-19 07:35:54,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 312 treesize of output 295 [2022-11-19 07:35:54,088 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 6 treesize of output 5 [2022-11-19 07:35:54,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-19 07:35:54,110 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 11 treesize of output 7 [2022-11-19 07:35:54,117 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 15 treesize of output 1 [2022-11-19 07:35:54,124 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 11 treesize of output 7 [2022-11-19 07:35:54,143 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 6 treesize of output 5 [2022-11-19 07:35:54,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-19 07:35:54,371 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 65 for LOIs [2022-11-19 07:35:54,463 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:35:56,709 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3663#(and (= |ULTIMATE.start_main_~len~2#1| 2) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_sll_length_~len~0#1|) (not (= (select |#valid| |ULTIMATE.start_sll_length_~head#1.base|) 1)) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= (+ |ULTIMATE.start_sll_create_~len#1| 1) 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-19 07:35:56,709 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:35:56,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:35:56,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2022-11-19 07:35:56,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180298784] [2022-11-19 07:35:56,709 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:35:56,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 07:35:56,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:56,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 07:35:56,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 07:35:56,711 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:35:57,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:57,268 INFO L93 Difference]: Finished difference Result 113 states and 127 transitions. [2022-11-19 07:35:57,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 07:35:57,269 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 34 [2022-11-19 07:35:57,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:57,269 INFO L225 Difference]: With dead ends: 113 [2022-11-19 07:35:57,270 INFO L226 Difference]: Without dead ends: 113 [2022-11-19 07:35:57,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=148, Invalid=1574, Unknown=0, NotChecked=0, Total=1722 [2022-11-19 07:35:57,271 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 59 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:57,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 790 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 319 Invalid, 0 Unknown, 41 Unchecked, 0.3s Time] [2022-11-19 07:35:57,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-19 07:35:57,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 96. [2022-11-19 07:35:57,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 70 states have (on average 1.4285714285714286) internal successors, (100), 88 states have internal predecessors, (100), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:35:57,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 108 transitions. [2022-11-19 07:35:57,275 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 108 transitions. Word has length 34 [2022-11-19 07:35:57,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:57,276 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 108 transitions. [2022-11-19 07:35:57,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:35:57,277 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 108 transitions. [2022-11-19 07:35:57,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-19 07:35:57,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:57,278 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:57,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:35:57,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 07:35:57,493 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-19 07:35:57,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:57,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1325286745, now seen corresponding path program 2 times [2022-11-19 07:35:57,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:57,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103890495] [2022-11-19 07:35:57,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:57,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:57,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:35:57,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:57,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103890495] [2022-11-19 07:35:57,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103890495] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:35:57,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877951390] [2022-11-19 07:35:57,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:35:57,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:57,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:57,846 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:35:57,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:35:57,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:35:57,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:35:57,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-19 07:35:57,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:58,084 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:35:58,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:35:58,324 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:35:58,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877951390] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:35:58,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1100217678] [2022-11-19 07:35:58,326 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-19 07:35:58,326 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:35:58,327 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:35:58,327 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:35:58,327 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:35:58,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:58,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:58,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:35:58,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:58,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:58,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:58,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:58,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:58,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-19 07:35:58,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:58,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:58,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 07:35:58,436 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 11 treesize of output 7 [2022-11-19 07:35:58,444 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 11 treesize of output 7 [2022-11-19 07:35:58,578 INFO L321 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2022-11-19 07:35:58,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 244 treesize of output 251 [2022-11-19 07:35:58,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:58,750 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:35:58,751 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 1 case distinctions, treesize of input 263 treesize of output 262 [2022-11-19 07:35:58,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:58,778 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-19 07:35:58,779 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 1 case distinctions, treesize of input 283 treesize of output 282 [2022-11-19 07:35:58,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:58,803 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-19 07:35:58,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 327 treesize of output 310 [2022-11-19 07:35:58,886 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 6 treesize of output 5 [2022-11-19 07:35:58,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-19 07:35:58,909 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 11 treesize of output 7 [2022-11-19 07:35:58,916 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 11 treesize of output 7 [2022-11-19 07:35:58,922 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 15 treesize of output 1 [2022-11-19 07:35:58,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-19 07:35:58,950 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 6 treesize of output 5 [2022-11-19 07:35:59,197 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 65 for LOIs [2022-11-19 07:35:59,291 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:36:01,817 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4127#(and (= |ULTIMATE.start_sll_length_~head#1.base| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= |ULTIMATE.start_sll_length_#res#1| 2147483647) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= (+ |ULTIMATE.start_sll_create_~len#1| 1) 0) (<= 0 |ULTIMATE.start_sll_length_~len~0#1|) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (not (= (+ |ULTIMATE.start_main_~len~2#1| |ULTIMATE.start_main_~k~0#1|) |ULTIMATE.start_sll_length_#res#1|)) (= |ULTIMATE.start_main_~k~0#1| 0) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |#NULL.offset| 0) (= |ULTIMATE.start_sll_length_~head#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_sll_length_~len~0#1| |ULTIMATE.start_sll_length_#res#1|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_main_~len~2#1| 2) (<= 2 |ULTIMATE.start_main_~len~2#1|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-19 07:36:01,817 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:36:01,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:36:01,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 14] total 22 [2022-11-19 07:36:01,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704969111] [2022-11-19 07:36:01,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:36:01,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 07:36:01,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:36:01,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 07:36:01,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1319, Unknown=0, NotChecked=0, Total=1482 [2022-11-19 07:36:01,820 INFO L87 Difference]: Start difference. First operand 96 states and 108 transitions. Second operand has 22 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 07:36:02,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:02,357 INFO L93 Difference]: Finished difference Result 309 states and 352 transitions. [2022-11-19 07:36:02,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 07:36:02,358 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-11-19 07:36:02,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:02,361 INFO L225 Difference]: With dead ends: 309 [2022-11-19 07:36:02,362 INFO L226 Difference]: Without dead ends: 309 [2022-11-19 07:36:02,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=211, Invalid=1769, Unknown=0, NotChecked=0, Total=1980 [2022-11-19 07:36:02,368 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 210 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:02,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 920 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:36:02,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-11-19 07:36:02,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 163. [2022-11-19 07:36:02,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 131 states have (on average 1.4351145038167938) internal successors, (188), 151 states have internal predecessors, (188), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-19 07:36:02,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 209 transitions. [2022-11-19 07:36:02,386 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 209 transitions. Word has length 35 [2022-11-19 07:36:02,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:02,387 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 209 transitions. [2022-11-19 07:36:02,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 07:36:02,387 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 209 transitions. [2022-11-19 07:36:02,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 07:36:02,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:02,391 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:02,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:36:02,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 07:36:02,596 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-19 07:36:02,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:02,597 INFO L85 PathProgramCache]: Analyzing trace with hash -212596561, now seen corresponding path program 1 times [2022-11-19 07:36:02,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:02,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279739167] [2022-11-19 07:36:02,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:02,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:02,719 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:36:02,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:02,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279739167] [2022-11-19 07:36:02,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279739167] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:36:02,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258663541] [2022-11-19 07:36:02,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:02,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:36:02,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:36:02,722 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:36:02,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:36:02,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:02,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:36:02,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:02,893 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:36:02,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:36:02,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258663541] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:02,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:36:02,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-19 07:36:02,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523121826] [2022-11-19 07:36:02,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:02,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:36:02,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:36:02,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:36:02,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:36:02,897 INFO L87 Difference]: Start difference. First operand 163 states and 209 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 07:36:02,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:02,995 INFO L93 Difference]: Finished difference Result 179 states and 203 transitions. [2022-11-19 07:36:02,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:36:02,996 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-11-19 07:36:02,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:02,997 INFO L225 Difference]: With dead ends: 179 [2022-11-19 07:36:02,997 INFO L226 Difference]: Without dead ends: 179 [2022-11-19 07:36:02,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:36:02,998 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 24 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:02,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 233 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:36:02,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-11-19 07:36:03,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 148. [2022-11-19 07:36:03,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 117 states have (on average 1.3076923076923077) internal successors, (153), 135 states have internal predecessors, (153), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-19 07:36:03,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 171 transitions. [2022-11-19 07:36:03,007 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 171 transitions. Word has length 37 [2022-11-19 07:36:03,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:03,008 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 171 transitions. [2022-11-19 07:36:03,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 07:36:03,008 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 171 transitions. [2022-11-19 07:36:03,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 07:36:03,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:03,010 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:03,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:36:03,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:36:03,221 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-19 07:36:03,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:03,221 INFO L85 PathProgramCache]: Analyzing trace with hash -2004636238, now seen corresponding path program 1 times [2022-11-19 07:36:03,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:03,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498128599] [2022-11-19 07:36:03,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:03,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:03,350 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:36:03,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:03,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498128599] [2022-11-19 07:36:03,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498128599] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:03,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:36:03,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:36:03,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034034633] [2022-11-19 07:36:03,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:03,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:36:03,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:36:03,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:36:03,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:36:03,352 INFO L87 Difference]: Start difference. First operand 148 states and 171 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:36:03,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:03,496 INFO L93 Difference]: Finished difference Result 187 states and 216 transitions. [2022-11-19 07:36:03,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:36:03,497 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2022-11-19 07:36:03,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:03,498 INFO L225 Difference]: With dead ends: 187 [2022-11-19 07:36:03,498 INFO L226 Difference]: Without dead ends: 187 [2022-11-19 07:36:03,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:36:03,499 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 115 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:03,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 119 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:36:03,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-11-19 07:36:03,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 153. [2022-11-19 07:36:03,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 123 states have (on average 1.3333333333333333) internal successors, (164), 140 states have internal predecessors, (164), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-19 07:36:03,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 182 transitions. [2022-11-19 07:36:03,506 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 182 transitions. Word has length 37 [2022-11-19 07:36:03,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:03,507 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 182 transitions. [2022-11-19 07:36:03,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:36:03,507 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 182 transitions. [2022-11-19 07:36:03,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 07:36:03,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:03,508 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:03,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-19 07:36:03,508 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-19 07:36:03,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:03,509 INFO L85 PathProgramCache]: Analyzing trace with hash -2004636237, now seen corresponding path program 1 times [2022-11-19 07:36:03,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:03,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057389175] [2022-11-19 07:36:03,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:03,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:03,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:36:03,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:03,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057389175] [2022-11-19 07:36:03,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057389175] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:03,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:36:03,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:36:03,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561525632] [2022-11-19 07:36:03,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:03,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:36:03,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:36:03,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:36:03,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:36:03,722 INFO L87 Difference]: Start difference. First operand 153 states and 182 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:36:03,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:03,918 INFO L93 Difference]: Finished difference Result 187 states and 215 transitions. [2022-11-19 07:36:03,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:36:03,919 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2022-11-19 07:36:03,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:03,920 INFO L225 Difference]: With dead ends: 187 [2022-11-19 07:36:03,920 INFO L226 Difference]: Without dead ends: 187 [2022-11-19 07:36:03,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:36:03,921 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 228 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:03,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 114 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:36:03,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-11-19 07:36:03,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 154. [2022-11-19 07:36:03,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 124 states have (on average 1.3225806451612903) internal successors, (164), 141 states have internal predecessors, (164), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-19 07:36:03,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 182 transitions. [2022-11-19 07:36:03,929 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 182 transitions. Word has length 37 [2022-11-19 07:36:03,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:03,929 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 182 transitions. [2022-11-19 07:36:03,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:36:03,929 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 182 transitions. [2022-11-19 07:36:03,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 07:36:03,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:03,930 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:03,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-19 07:36:03,931 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-19 07:36:03,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:03,931 INFO L85 PathProgramCache]: Analyzing trace with hash -2004634733, now seen corresponding path program 1 times [2022-11-19 07:36:03,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:03,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174487393] [2022-11-19 07:36:03,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:03,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:36:04,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:04,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174487393] [2022-11-19 07:36:04,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174487393] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:36:04,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23226916] [2022-11-19 07:36:04,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:04,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:36:04,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:36:04,072 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:36:04,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:36:04,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:04,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:36:04,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:04,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-19 07:36:04,288 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:36:04,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:36:04,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23226916] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:04,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:36:04,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 11 [2022-11-19 07:36:04,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215958196] [2022-11-19 07:36:04,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:04,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:36:04,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:36:04,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:36:04,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:36:04,291 INFO L87 Difference]: Start difference. First operand 154 states and 182 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:36:04,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:04,387 INFO L93 Difference]: Finished difference Result 173 states and 199 transitions. [2022-11-19 07:36:04,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:36:04,388 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2022-11-19 07:36:04,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:04,389 INFO L225 Difference]: With dead ends: 173 [2022-11-19 07:36:04,389 INFO L226 Difference]: Without dead ends: 173 [2022-11-19 07:36:04,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:36:04,390 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 64 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:04,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 252 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2022-11-19 07:36:04,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-11-19 07:36:04,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 154. [2022-11-19 07:36:04,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 124 states have (on average 1.314516129032258) internal successors, (163), 141 states have internal predecessors, (163), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-19 07:36:04,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 181 transitions. [2022-11-19 07:36:04,396 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 181 transitions. Word has length 37 [2022-11-19 07:36:04,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:04,397 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 181 transitions. [2022-11-19 07:36:04,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:36:04,397 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 181 transitions. [2022-11-19 07:36:04,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 07:36:04,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:04,398 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:04,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:36:04,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:36:04,607 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-19 07:36:04,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:04,608 INFO L85 PathProgramCache]: Analyzing trace with hash -81478527, now seen corresponding path program 1 times [2022-11-19 07:36:04,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:04,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213451097] [2022-11-19 07:36:04,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:04,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:04,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:04,727 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:36:04,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:04,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213451097] [2022-11-19 07:36:04,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213451097] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:36:04,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138051557] [2022-11-19 07:36:04,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:04,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:36:04,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:36:04,730 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:36:04,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:36:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:04,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:36:04,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:04,910 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:36:04,910 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:36:04,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138051557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:04,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:36:04,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2022-11-19 07:36:04,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409052990] [2022-11-19 07:36:04,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:04,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:36:04,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:36:04,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:36:04,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:36:04,913 INFO L87 Difference]: Start difference. First operand 154 states and 181 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:36:05,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:05,032 INFO L93 Difference]: Finished difference Result 177 states and 206 transitions. [2022-11-19 07:36:05,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:36:05,033 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2022-11-19 07:36:05,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:05,034 INFO L225 Difference]: With dead ends: 177 [2022-11-19 07:36:05,034 INFO L226 Difference]: Without dead ends: 177 [2022-11-19 07:36:05,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:36:05,035 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 27 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:05,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 225 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:36:05,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-11-19 07:36:05,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 152. [2022-11-19 07:36:05,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 122 states have (on average 1.3032786885245902) internal successors, (159), 140 states have internal predecessors, (159), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-19 07:36:05,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 177 transitions. [2022-11-19 07:36:05,041 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 177 transitions. Word has length 37 [2022-11-19 07:36:05,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:05,041 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 177 transitions. [2022-11-19 07:36:05,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:36:05,042 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 177 transitions. [2022-11-19 07:36:05,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 07:36:05,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:05,042 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:05,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:36:05,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:36:05,249 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-19 07:36:05,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:05,249 INFO L85 PathProgramCache]: Analyzing trace with hash -423681727, now seen corresponding path program 2 times [2022-11-19 07:36:05,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:05,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802669914] [2022-11-19 07:36:05,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:05,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:05,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:05,472 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:36:05,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:05,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802669914] [2022-11-19 07:36:05,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802669914] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:36:05,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051833658] [2022-11-19 07:36:05,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:36:05,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:36:05,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:36:05,475 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:36:05,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:36:05,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 07:36:05,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:36:05,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:36:05,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:05,690 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:36:05,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:36:05,861 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:36:05,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051833658] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:36:05,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [479045373] [2022-11-19 07:36:05,863 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-19 07:36:05,863 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:36:05,864 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:36:05,864 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:36:05,864 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:36:05,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:05,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:05,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:36:05,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:05,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:05,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:05,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:05,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:05,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-19 07:36:05,994 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 11 treesize of output 7 [2022-11-19 07:36:06,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:06,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:06,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 07:36:06,020 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 11 treesize of output 7 [2022-11-19 07:36:06,194 INFO L321 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2022-11-19 07:36:06,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 238 treesize of output 245 [2022-11-19 07:36:06,351 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:36:06,352 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 1 case distinctions, treesize of input 250 treesize of output 249 [2022-11-19 07:36:06,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:06,379 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-19 07:36:06,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 245 [2022-11-19 07:36:06,401 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:36:06,401 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 1 case distinctions, treesize of input 258 treesize of output 257 [2022-11-19 07:36:06,457 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 6 treesize of output 5 [2022-11-19 07:36:06,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-19 07:36:06,479 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 15 treesize of output 1 [2022-11-19 07:36:06,486 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 11 treesize of output 7 [2022-11-19 07:36:06,493 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 11 treesize of output 7 [2022-11-19 07:36:06,513 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 6 treesize of output 5 [2022-11-19 07:36:06,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-19 07:36:06,796 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 67 for LOIs [2022-11-19 07:36:06,955 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:36:08,827 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6918#(and (<= 0 (+ |ULTIMATE.start_sll_create_#in~len#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~k~0#1| 2147483648)) (= |ULTIMATE.start_sll_length_~head#1.base| 0) (<= |ULTIMATE.start_sll_length_#res#1| 2147483647) (<= |ULTIMATE.start_main_~len~2#1| 2147483647) (<= |ULTIMATE.start_main_~i~0#1| 0) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= (+ |ULTIMATE.start_sll_create_~len#1| 1) 0) (<= 0 |ULTIMATE.start_sll_length_~len~0#1|) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_sll_create_#in~len#1| 2147483647) (not (= (+ |ULTIMATE.start_main_~len~2#1| |ULTIMATE.start_main_~k~0#1|) |ULTIMATE.start_sll_length_#res#1|)) (<= |ULTIMATE.start_main_~k~0#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_sll_length_~head#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_sll_length_~len~0#1| |ULTIMATE.start_sll_length_#res#1|) (<= 0 (+ 2147483649 |ULTIMATE.start_sll_create_~len#1|)) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#NULL.offset|) (<= 0 (+ |ULTIMATE.start_main_~len~2#1| 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-19 07:36:08,827 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:36:08,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:36:08,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-11-19 07:36:08,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354133369] [2022-11-19 07:36:08,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:36:08,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 07:36:08,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:36:08,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 07:36:08,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2022-11-19 07:36:08,829 INFO L87 Difference]: Start difference. First operand 152 states and 177 transitions. Second operand has 16 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:36:09,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:09,213 INFO L93 Difference]: Finished difference Result 149 states and 173 transitions. [2022-11-19 07:36:09,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 07:36:09,213 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2022-11-19 07:36:09,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:09,214 INFO L225 Difference]: With dead ends: 149 [2022-11-19 07:36:09,214 INFO L226 Difference]: Without dead ends: 149 [2022-11-19 07:36:09,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 85 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 07:36:09,215 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 16 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:09,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 535 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:36:09,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-19 07:36:09,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 142. [2022-11-19 07:36:09,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 113 states have (on average 1.3185840707964602) internal successors, (149), 131 states have internal predecessors, (149), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-19 07:36:09,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 164 transitions. [2022-11-19 07:36:09,220 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 164 transitions. Word has length 37 [2022-11-19 07:36:09,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:09,221 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 164 transitions. [2022-11-19 07:36:09,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:36:09,221 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 164 transitions. [2022-11-19 07:36:09,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-19 07:36:09,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:09,227 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:09,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:36:09,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:36:09,428 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-19 07:36:09,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:09,428 INFO L85 PathProgramCache]: Analyzing trace with hash 800675287, now seen corresponding path program 1 times [2022-11-19 07:36:09,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:09,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208168233] [2022-11-19 07:36:09,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:09,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:09,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:09,719 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:36:09,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:09,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208168233] [2022-11-19 07:36:09,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208168233] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:36:09,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121024832] [2022-11-19 07:36:09,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:09,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:36:09,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:36:09,721 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:36:09,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 07:36:09,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:09,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-19 07:36:09,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:09,879 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:36:09,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:09,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-11-19 07:36:09,971 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:36:09,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 07:36:10,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:36:10,072 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:36:10,072 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2022-11-19 07:36:10,163 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:36:10,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 07:36:10,178 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:36:10,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:36:10,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-11-19 07:36:10,421 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:36:10,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121024832] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:36:10,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1165329378] [2022-11-19 07:36:10,423 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-19 07:36:10,423 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:36:10,424 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:36:10,424 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:36:10,424 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:36:10,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:10,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:10,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:36:10,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:10,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:10,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:10,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:10,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:10,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-19 07:36:10,544 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 11 treesize of output 7 [2022-11-19 07:36:10,553 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 11 treesize of output 7 [2022-11-19 07:36:10,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:10,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:10,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 07:36:10,707 INFO L321 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2022-11-19 07:36:10,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 241 treesize of output 248 [2022-11-19 07:36:10,884 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:36:10,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 257 treesize of output 256 [2022-11-19 07:36:10,912 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:36:10,912 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 1 case distinctions, treesize of input 265 treesize of output 264 [2022-11-19 07:36:10,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:10,940 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-19 07:36:10,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 309 treesize of output 292 [2022-11-19 07:36:11,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-19 07:36:11,007 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 6 treesize of output 5 [2022-11-19 07:36:11,021 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 15 treesize of output 1 [2022-11-19 07:36:11,027 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 11 treesize of output 7 [2022-11-19 07:36:11,034 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 11 treesize of output 7 [2022-11-19 07:36:11,057 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 6 treesize of output 5 [2022-11-19 07:36:11,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-19 07:36:11,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-19 07:36:11,275 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 6 treesize of output 5 [2022-11-19 07:36:11,369 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 26 for LOIs [2022-11-19 07:36:11,470 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:36:13,719 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7484#(and (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~k~0#1|) (<= 0 (+ |ULTIMATE.start_sll_create_#in~len#1| 2147483648)) (= |ULTIMATE.start_main_~i~0#1| 0) (= 1 (select |#valid| |ULTIMATE.start_sll_insert_~new_node~0#1.base|)) (= |ULTIMATE.start_sll_create_~head~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (= |ULTIMATE.start_sll_insert_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_main_~#s~0#1.offset| |ULTIMATE.start_sll_insert_#in~head#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_main_~len~2#1| 2147483647) (<= (+ |ULTIMATE.start_sll_create_~len#1| 1) 0) (<= |ULTIMATE.start_main_~k~0#1| 2147483647) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_sll_create_#in~len#1| 2147483647) (= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 0) (not (= |ULTIMATE.start_sll_insert_~new_node~0#1.base| 0)) (= |ULTIMATE.start_sll_insert_~head#1.offset| |ULTIMATE.start_sll_insert_#in~head#1.offset|) (= |ULTIMATE.start_sll_insert_~second_to_last~0#1.base| 0) (<= 0 (+ |ULTIMATE.start_main_~position~0#1| 2147483648)) (= (select |#length| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 4) (<= |ULTIMATE.start_main_~position~0#1| 2147483647) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_sll_insert_~position#1| |ULTIMATE.start_sll_insert_#in~position#1|) (= |ULTIMATE.start_sll_insert_#in~position#1| |ULTIMATE.start_main_~position~0#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (< |ULTIMATE.start_sll_insert_~new_node~0#1.base| |#StackHeapBarrier|) (<= 0 (+ 2147483649 |ULTIMATE.start_sll_create_~len#1|)) (= |ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 (+ |ULTIMATE.start_main_~len~2#1| 2147483648)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_create_#res#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_sll_insert_#in~head#1.base| |ULTIMATE.start_sll_insert_~head#1.base|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (not (= (select |#valid| |ULTIMATE.start_sll_insert_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-19 07:36:13,720 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:36:13,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:36:13,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 16 [2022-11-19 07:36:13,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434643290] [2022-11-19 07:36:13,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:36:13,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 07:36:13,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:36:13,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 07:36:13,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2022-11-19 07:36:13,722 INFO L87 Difference]: Start difference. First operand 142 states and 164 transitions. Second operand has 17 states, 16 states have (on average 2.9375) internal successors, (47), 17 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:36:14,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:14,067 INFO L93 Difference]: Finished difference Result 166 states and 188 transitions. [2022-11-19 07:36:14,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 07:36:14,071 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.9375) internal successors, (47), 17 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-11-19 07:36:14,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:14,072 INFO L225 Difference]: With dead ends: 166 [2022-11-19 07:36:14,072 INFO L226 Difference]: Without dead ends: 166 [2022-11-19 07:36:14,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 81 SyntacticMatches, 15 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=221, Invalid=1111, Unknown=0, NotChecked=0, Total=1332 [2022-11-19 07:36:14,074 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 213 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:14,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 311 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 230 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-11-19 07:36:14,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-19 07:36:14,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 145. [2022-11-19 07:36:14,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 117 states have (on average 1.2991452991452992) internal successors, (152), 133 states have internal predecessors, (152), 5 states have call successors, (5), 4 states have call predecessors, (5), 7 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-19 07:36:14,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 166 transitions. [2022-11-19 07:36:14,086 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 166 transitions. Word has length 39 [2022-11-19 07:36:14,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:14,087 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 166 transitions. [2022-11-19 07:36:14,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.9375) internal successors, (47), 17 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:36:14,087 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 166 transitions. [2022-11-19 07:36:14,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-19 07:36:14,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:14,088 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:14,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 07:36:14,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:36:14,294 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-19 07:36:14,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:14,295 INFO L85 PathProgramCache]: Analyzing trace with hash 800675288, now seen corresponding path program 1 times [2022-11-19 07:36:14,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:14,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678797676] [2022-11-19 07:36:14,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:14,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:14,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:14,717 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:36:14,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:14,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678797676] [2022-11-19 07:36:14,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678797676] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:36:14,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158137603] [2022-11-19 07:36:14,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:14,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:36:14,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:36:14,720 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:36:14,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 07:36:14,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:14,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:36:14,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:14,863 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:36:14,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:14,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-19 07:36:14,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:14,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-19 07:36:15,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:15,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-19 07:36:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 07:36:15,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:36:15,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158137603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:15,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:36:15,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-11-19 07:36:15,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641955562] [2022-11-19 07:36:15,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:15,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:36:15,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:36:15,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:36:15,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:36:15,156 INFO L87 Difference]: Start difference. First operand 145 states and 166 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 07:36:15,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:15,260 INFO L93 Difference]: Finished difference Result 159 states and 178 transitions. [2022-11-19 07:36:15,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:36:15,260 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-11-19 07:36:15,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:15,261 INFO L225 Difference]: With dead ends: 159 [2022-11-19 07:36:15,261 INFO L226 Difference]: Without dead ends: 159 [2022-11-19 07:36:15,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:36:15,262 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 88 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:15,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 90 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 14 Unchecked, 0.1s Time] [2022-11-19 07:36:15,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-11-19 07:36:15,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 143. [2022-11-19 07:36:15,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 117 states have (on average 1.2820512820512822) internal successors, (150), 131 states have internal predecessors, (150), 5 states have call successors, (5), 4 states have call predecessors, (5), 7 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-19 07:36:15,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 164 transitions. [2022-11-19 07:36:15,269 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 164 transitions. Word has length 39 [2022-11-19 07:36:15,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:15,270 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 164 transitions. [2022-11-19 07:36:15,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 07:36:15,270 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 164 transitions. [2022-11-19 07:36:15,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-19 07:36:15,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:15,273 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:15,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 07:36:15,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-19 07:36:15,480 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-19 07:36:15,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:15,480 INFO L85 PathProgramCache]: Analyzing trace with hash -57913291, now seen corresponding path program 3 times [2022-11-19 07:36:15,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:15,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124971558] [2022-11-19 07:36:15,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:15,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:15,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:15,632 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:36:15,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:15,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124971558] [2022-11-19 07:36:15,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124971558] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:36:15,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80607043] [2022-11-19 07:36:15,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:36:15,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:36:15,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:36:15,635 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:36:15,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4fd06b-7384-44de-9e14-4ee0d5bf4a38/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 07:36:15,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:36:15,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:36:15,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-19 07:36:15,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:15,791 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:36:15,829 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:36:15,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 07:36:15,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:36:15,911 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-19 07:36:15,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 34 [2022-11-19 07:36:15,976 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 07:36:15,976 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 36 treesize of output 31 [2022-11-19 07:36:15,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:36:16,892 INFO L321 Elim1Store]: treesize reduction 48, result has 84.7 percent of original size [2022-11-19 07:36:16,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 167 treesize of output 379 [2022-11-19 07:39:53,145 WARN L233 SmtUtils]: Spent 8.80s on a formula simplification. DAG size of input: 3388 DAG size of output: 3388 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:48:38,929 WARN L233 SmtUtils]: Spent 6.47s on a formula simplification that was a NOOP. DAG size: 1555 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)