./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-examples/standard_strcpy_original-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/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_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-examples/standard_strcpy_original-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/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_1e03627a-7511-4b44-bfa7-1f0018d56c13/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 25419aae3fa6b25817a0bb63109cdb8dd339b767b8ddb876acb37423139730d4 --- 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 07:44:25,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:44:25,743 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:44:25,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:44:25,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:44:25,791 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:44:25,794 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:44:25,798 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:44:25,800 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:44:25,806 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:44:25,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:44:25,809 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:44:25,811 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:44:25,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:44:25,815 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:44:25,816 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:44:25,818 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:44:25,820 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:44:25,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:44:25,828 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:44:25,830 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:44:25,831 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:44:25,835 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:44:25,836 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:44:25,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:44:25,839 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:44:25,840 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:44:25,844 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:44:25,844 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:44:25,846 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:44:25,846 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:44:25,847 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:44:25,849 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:44:25,850 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:44:25,851 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:44:25,851 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:44:25,852 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:44:25,852 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:44:25,853 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:44:25,853 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:44:25,854 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:44:25,855 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 07:44:25,897 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:44:25,897 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:44:25,898 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:44:25,898 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:44:25,899 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:44:25,899 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:44:25,899 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:44:25,900 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:44:25,900 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:44:25,900 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:44:25,901 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:44:25,901 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:44:25,902 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:44:25,902 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:44:25,902 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:44:25,902 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:44:25,902 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:44:25,903 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:44:25,903 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 07:44:25,904 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 07:44:25,904 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:44:25,904 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:44:25,904 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 07:44:25,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:44:25,905 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:44:25,905 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:44:25,905 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 07:44:25,905 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 07:44:25,906 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 07:44:25,906 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:44:25,906 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:44:25,906 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:44:25,907 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:44:25,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:44:25,907 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:44:25,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:44:25,908 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:44:25,908 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:44:25,908 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:44:25,908 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:44:25,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:44:25,909 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:44:25,909 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_1e03627a-7511-4b44-bfa7-1f0018d56c13/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25419aae3fa6b25817a0bb63109cdb8dd339b767b8ddb876acb37423139730d4 [2022-11-19 07:44:26,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:44:26,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:44:26,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:44:26,254 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:44:26,263 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:44:26,264 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/array-examples/standard_strcpy_original-1.i [2022-11-19 07:44:26,356 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/data/34b88fd31/2d2e023bcbee438792270556d90eb34d/FLAGfe491fa37 [2022-11-19 07:44:26,775 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:44:26,776 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/sv-benchmarks/c/array-examples/standard_strcpy_original-1.i [2022-11-19 07:44:26,781 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/data/34b88fd31/2d2e023bcbee438792270556d90eb34d/FLAGfe491fa37 [2022-11-19 07:44:26,793 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/data/34b88fd31/2d2e023bcbee438792270556d90eb34d [2022-11-19 07:44:26,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:44:26,798 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:44:26,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:44:26,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:44:26,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:44:26,810 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:44:26" (1/1) ... [2022-11-19 07:44:26,811 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21011caf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:26, skipping insertion in model container [2022-11-19 07:44:26,811 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:44:26" (1/1) ... [2022-11-19 07:44:26,818 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:44:26,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:44:27,026 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_1e03627a-7511-4b44-bfa7-1f0018d56c13/sv-benchmarks/c/array-examples/standard_strcpy_original-1.i[819,832] [2022-11-19 07:44:27,043 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:44:27,052 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:44:27,064 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_1e03627a-7511-4b44-bfa7-1f0018d56c13/sv-benchmarks/c/array-examples/standard_strcpy_original-1.i[819,832] [2022-11-19 07:44:27,070 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:44:27,083 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:44:27,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:27 WrapperNode [2022-11-19 07:44:27,084 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:44:27,085 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:44:27,085 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:44:27,085 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:44:27,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:27" (1/1) ... [2022-11-19 07:44:27,100 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:27" (1/1) ... [2022-11-19 07:44:27,119 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2022-11-19 07:44:27,119 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:44:27,120 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:44:27,120 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:44:27,120 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:44:27,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:27" (1/1) ... [2022-11-19 07:44:27,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:27" (1/1) ... [2022-11-19 07:44:27,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:27" (1/1) ... [2022-11-19 07:44:27,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:27" (1/1) ... [2022-11-19 07:44:27,137 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:27" (1/1) ... [2022-11-19 07:44:27,140 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:27" (1/1) ... [2022-11-19 07:44:27,141 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:27" (1/1) ... [2022-11-19 07:44:27,142 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:27" (1/1) ... [2022-11-19 07:44:27,144 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:44:27,145 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:44:27,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:44:27,145 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:44:27,147 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:27" (1/1) ... [2022-11-19 07:44:27,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:44:27,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:44:27,180 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:44:27,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:44:27,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:44:27,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:44:27,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:44:27,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:44:27,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:44:27,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:44:27,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:44:27,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:44:27,291 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:44:27,293 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:44:27,558 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:44:27,594 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:44:27,594 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-19 07:44:27,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:44:27 BoogieIcfgContainer [2022-11-19 07:44:27,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:44:27,599 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:44:27,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:44:27,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:44:27,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:44:26" (1/3) ... [2022-11-19 07:44:27,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20aa6d27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:44:27, skipping insertion in model container [2022-11-19 07:44:27,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:27" (2/3) ... [2022-11-19 07:44:27,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20aa6d27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:44:27, skipping insertion in model container [2022-11-19 07:44:27,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:44:27" (3/3) ... [2022-11-19 07:44:27,606 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_strcpy_original-1.i [2022-11-19 07:44:27,626 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:44:27,626 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-11-19 07:44:27,674 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:44:27,693 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;@5d97ee52, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:44:27,693 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2022-11-19 07:44:27,698 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:27,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 07:44:27,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:27,718 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 07:44:27,719 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-19 07:44:27,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:27,739 INFO L85 PathProgramCache]: Analyzing trace with hash 114230, now seen corresponding path program 1 times [2022-11-19 07:44:27,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:27,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399762417] [2022-11-19 07:44:27,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:27,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:27,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:28,014 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 07:44:28,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:28,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399762417] [2022-11-19 07:44:28,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399762417] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:44:28,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:44:28,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:44:28,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530611237] [2022-11-19 07:44:28,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:44:28,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:44:28,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:28,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:44:28,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:44:28,071 INFO L87 Difference]: Start difference. First operand has 34 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:28,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:28,212 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2022-11-19 07:44:28,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:44:28,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 07:44:28,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:28,236 INFO L225 Difference]: With dead ends: 67 [2022-11-19 07:44:28,236 INFO L226 Difference]: Without dead ends: 65 [2022-11-19 07:44:28,238 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 07:44:28,244 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 30 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:28,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 33 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:44:28,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-19 07:44:28,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2022-11-19 07:44:28,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 2.0) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:28,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2022-11-19 07:44:28,292 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 3 [2022-11-19 07:44:28,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:28,292 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2022-11-19 07:44:28,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:28,294 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2022-11-19 07:44:28,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 07:44:28,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:28,295 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 07:44:28,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:44:28,296 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-19 07:44:28,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:28,300 INFO L85 PathProgramCache]: Analyzing trace with hash 111798, now seen corresponding path program 1 times [2022-11-19 07:44:28,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:28,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959266674] [2022-11-19 07:44:28,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:28,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:28,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:28,468 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 07:44:28,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:28,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959266674] [2022-11-19 07:44:28,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959266674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:44:28,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:44:28,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:44:28,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905695925] [2022-11-19 07:44:28,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:44:28,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:44:28,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:28,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:44:28,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:44:28,472 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:28,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:28,518 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2022-11-19 07:44:28,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:44:28,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 07:44:28,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:28,520 INFO L225 Difference]: With dead ends: 29 [2022-11-19 07:44:28,520 INFO L226 Difference]: Without dead ends: 29 [2022-11-19 07:44:28,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:44:28,530 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:28,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 13 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:44:28,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-19 07:44:28,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-19 07:44:28,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:28,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-11-19 07:44:28,539 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 3 [2022-11-19 07:44:28,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:28,540 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-11-19 07:44:28,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:28,540 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-11-19 07:44:28,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 07:44:28,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:28,541 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 07:44:28,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:44:28,542 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-19 07:44:28,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:28,543 INFO L85 PathProgramCache]: Analyzing trace with hash 111799, now seen corresponding path program 1 times [2022-11-19 07:44:28,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:28,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444820747] [2022-11-19 07:44:28,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:28,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:28,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:28,730 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 07:44:28,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:28,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444820747] [2022-11-19 07:44:28,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444820747] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:44:28,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:44:28,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:44:28,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52589843] [2022-11-19 07:44:28,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:44:28,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:44:28,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:28,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:44:28,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:44:28,738 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:28,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:28,796 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-11-19 07:44:28,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:44:28,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 07:44:28,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:28,799 INFO L225 Difference]: With dead ends: 30 [2022-11-19 07:44:28,799 INFO L226 Difference]: Without dead ends: 30 [2022-11-19 07:44:28,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:44:28,802 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:28,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:44:28,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-19 07:44:28,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-19 07:44:28,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:28,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-11-19 07:44:28,807 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 3 [2022-11-19 07:44:28,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:28,807 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-11-19 07:44:28,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:28,808 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-11-19 07:44:28,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 07:44:28,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:28,808 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 07:44:28,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:44:28,809 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-19 07:44:28,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:28,810 INFO L85 PathProgramCache]: Analyzing trace with hash 107509825, now seen corresponding path program 1 times [2022-11-19 07:44:28,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:28,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606862014] [2022-11-19 07:44:28,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:28,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:28,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:28,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:28,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606862014] [2022-11-19 07:44:28,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606862014] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:44:28,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87222693] [2022-11-19 07:44:28,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:28,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:28,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:44:28,866 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:44:28,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:44:28,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:28,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:44:28,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:44:28,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:28,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:44:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:28,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87222693] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:44:28,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1796889758] [2022-11-19 07:44:29,016 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-19 07:44:29,017 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:44:29,021 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:44:29,027 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:44:29,028 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:44:29,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:29,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:29,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:29,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:29,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:29,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-19 07:44:29,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:29,173 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 26 treesize of output 28 [2022-11-19 07:44:29,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:29,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:29,388 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 07:44:29,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 249 treesize of output 248 [2022-11-19 07:44:29,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:44:29,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:44:29,875 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:44:30,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1796889758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:44:30,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:44:30,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 9 [2022-11-19 07:44:30,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176709362] [2022-11-19 07:44:30,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:44:30,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:44:30,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:30,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:44:30,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:44:30,242 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:30,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:30,541 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2022-11-19 07:44:30,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:44:30,542 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 07:44:30,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:30,542 INFO L225 Difference]: With dead ends: 31 [2022-11-19 07:44:30,542 INFO L226 Difference]: Without dead ends: 31 [2022-11-19 07:44:30,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:44:30,544 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:30,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 44 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2022-11-19 07:44:30,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-19 07:44:30,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-19 07:44:30,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.65) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:30,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2022-11-19 07:44:30,548 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 5 [2022-11-19 07:44:30,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:30,548 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2022-11-19 07:44:30,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:30,549 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-11-19 07:44:30,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 07:44:30,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:30,549 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2022-11-19 07:44:30,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:44:30,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:30,750 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-19 07:44:30,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:30,751 INFO L85 PathProgramCache]: Analyzing trace with hash 107507393, now seen corresponding path program 1 times [2022-11-19 07:44:30,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:30,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179579000] [2022-11-19 07:44:30,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:30,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:30,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:30,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:30,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:30,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179579000] [2022-11-19 07:44:30,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179579000] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:44:30,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123905168] [2022-11-19 07:44:30,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:30,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:30,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:44:30,967 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:44:30,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:44:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:31,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:44:31,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:44:31,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:31,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-19 07:44:31,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 07:44:31,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:31,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:44:31,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:31,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123905168] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:44:31,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [830888256] [2022-11-19 07:44:31,191 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-11-19 07:44:31,191 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:44:31,191 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:44:31,192 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:44:31,192 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:44:31,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:31,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:31,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:31,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:31,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:31,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-19 07:44:31,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:31,272 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 26 treesize of output 28 [2022-11-19 07:44:31,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:31,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:31,405 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 07:44:31,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 249 treesize of output 248 [2022-11-19 07:44:31,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:44:31,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:44:31,628 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:44:31,973 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '395#(and (<= |ULTIMATE.start_main_#t~nondet2#1| 2147483647) (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet2#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |#NULL.offset| 0) (not (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:44:31,973 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:44:31,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:44:31,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-19 07:44:31,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229010061] [2022-11-19 07:44:31,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:44:31,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:44:31,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:31,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:44:31,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:44:31,975 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:32,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:32,091 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-11-19 07:44:32,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:44:32,092 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 07:44:32,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:32,093 INFO L225 Difference]: With dead ends: 35 [2022-11-19 07:44:32,093 INFO L226 Difference]: Without dead ends: 35 [2022-11-19 07:44:32,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:44:32,094 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:32,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 47 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:44:32,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-19 07:44:32,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-19 07:44:32,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.5) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:32,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-11-19 07:44:32,098 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 5 [2022-11-19 07:44:32,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:32,098 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-11-19 07:44:32,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:32,098 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-11-19 07:44:32,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:44:32,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:32,099 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 07:44:32,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:44:32,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:32,305 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-19 07:44:32,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:32,306 INFO L85 PathProgramCache]: Analyzing trace with hash 923771867, now seen corresponding path program 1 times [2022-11-19 07:44:32,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:32,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550248858] [2022-11-19 07:44:32,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:32,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:32,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:32,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:32,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:32,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550248858] [2022-11-19 07:44:32,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550248858] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:44:32,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538254157] [2022-11-19 07:44:32,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:32,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:32,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:44:32,414 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:44:32,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:44:32,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:32,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:44:32,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:44:32,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:32,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:44:32,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:32,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538254157] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:44:32,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [70447095] [2022-11-19 07:44:32,545 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:44:32,545 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:44:32,546 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:44:32,546 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:44:32,547 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:44:32,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:32,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:32,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:32,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:32,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:32,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-19 07:44:32,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:32,628 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 26 treesize of output 28 [2022-11-19 07:44:32,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:32,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:32,765 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 07:44:32,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 249 treesize of output 248 [2022-11-19 07:44:32,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:44:32,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:44:33,006 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:44:33,682 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '533#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_71| Int)) (and (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_71| 4)) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (<= 0 (+ 2147483648 (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (- 4) (* |v_ULTIMATE.start_main_~i~0#1_71| 4))))) (<= 100000 |v_ULTIMATE.start_main_~i~0#1_71|) (<= 4 (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_71| 4))) (<= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (- 4) (* |v_ULTIMATE.start_main_~i~0#1_71| 4))) 2147483647))) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |#NULL.offset| 0) (not (= (select |#valid| |ULTIMATE.start_main_~#dst~0#1.base|) 1)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:44:33,682 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:44:33,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:44:33,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-19 07:44:33,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651581328] [2022-11-19 07:44:33,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:44:33,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:44:33,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:33,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:44:33,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2022-11-19 07:44:33,684 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:33,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:33,906 INFO L93 Difference]: Finished difference Result 169 states and 177 transitions. [2022-11-19 07:44:33,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:44:33,907 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 07:44:33,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:33,909 INFO L225 Difference]: With dead ends: 169 [2022-11-19 07:44:33,909 INFO L226 Difference]: Without dead ends: 169 [2022-11-19 07:44:33,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2022-11-19 07:44:33,910 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 185 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:33,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 78 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:44:33,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-19 07:44:33,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 38. [2022-11-19 07:44:33,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:33,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-11-19 07:44:33,923 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 10 [2022-11-19 07:44:33,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:33,923 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-11-19 07:44:33,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:33,923 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-11-19 07:44:33,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:44:33,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:33,924 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1] [2022-11-19 07:44:33,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:44:34,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 07:44:34,125 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-19 07:44:34,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:34,125 INFO L85 PathProgramCache]: Analyzing trace with hash 687930847, now seen corresponding path program 2 times [2022-11-19 07:44:34,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:34,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645126452] [2022-11-19 07:44:34,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:34,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:34,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:34,432 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:34,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:34,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645126452] [2022-11-19 07:44:34,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645126452] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:44:34,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010766120] [2022-11-19 07:44:34,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:44:34,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:34,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:44:34,434 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:44:34,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:44:34,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 07:44:34,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:44:34,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:44:34,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:44:34,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:34,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-19 07:44:34,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-19 07:44:34,616 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:44:34,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:44:34,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010766120] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:44:34,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:44:34,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2022-11-19 07:44:34,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161344205] [2022-11-19 07:44:34,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:44:34,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:44:34,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:34,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:44:34,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:44:34,619 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:34,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:34,675 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2022-11-19 07:44:34,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:44:34,676 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 07:44:34,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:34,678 INFO L225 Difference]: With dead ends: 37 [2022-11-19 07:44:34,679 INFO L226 Difference]: Without dead ends: 37 [2022-11-19 07:44:34,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:44:34,680 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:34,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 32 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:44:34,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-19 07:44:34,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-19 07:44:34,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:34,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-11-19 07:44:34,692 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 11 [2022-11-19 07:44:34,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:34,693 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-11-19 07:44:34,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:34,693 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-11-19 07:44:34,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 07:44:34,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:34,694 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2022-11-19 07:44:34,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:44:34,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:34,899 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-19 07:44:34,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:34,900 INFO L85 PathProgramCache]: Analyzing trace with hash 841694643, now seen corresponding path program 2 times [2022-11-19 07:44:34,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:34,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821852017] [2022-11-19 07:44:34,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:34,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:34,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:35,038 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:35,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:35,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821852017] [2022-11-19 07:44:35,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821852017] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:44:35,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673765184] [2022-11-19 07:44:35,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:44:35,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:35,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:44:35,043 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:44:35,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:44:35,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-19 07:44:35,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:44:35,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:44:35,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:44:35,128 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:44:35,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-19 07:44:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 07:44:35,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:44:35,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673765184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:44:35,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:44:35,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [8] total 9 [2022-11-19 07:44:35,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298487708] [2022-11-19 07:44:35,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:44:35,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:44:35,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:35,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:44:35,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:44:35,163 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:35,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:35,183 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2022-11-19 07:44:35,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:44:35,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-19 07:44:35,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:35,184 INFO L225 Difference]: With dead ends: 35 [2022-11-19 07:44:35,184 INFO L226 Difference]: Without dead ends: 35 [2022-11-19 07:44:35,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:44:35,185 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:35,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 13 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:44:35,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-19 07:44:35,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-19 07:44:35,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:35,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-11-19 07:44:35,188 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 18 [2022-11-19 07:44:35,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:35,189 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-11-19 07:44:35,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:35,189 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-11-19 07:44:35,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 07:44:35,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:35,190 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2022-11-19 07:44:35,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:44:35,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:35,395 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-19 07:44:35,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:35,395 INFO L85 PathProgramCache]: Analyzing trace with hash 841694644, now seen corresponding path program 1 times [2022-11-19 07:44:35,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:35,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772033308] [2022-11-19 07:44:35,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:35,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:35,547 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:35,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:35,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772033308] [2022-11-19 07:44:35,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772033308] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:44:35,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747359877] [2022-11-19 07:44:35,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:35,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:35,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:44:35,565 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:44:35,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:44:35,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:35,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:44:35,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:44:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:35,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:44:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:35,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747359877] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:44:35,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1692057041] [2022-11-19 07:44:35,811 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:44:35,811 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:44:35,812 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:44:35,812 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:44:35,812 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:44:35,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:35,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:35,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:35,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:35,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:35,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-19 07:44:35,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:35,880 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 31 treesize of output 33 [2022-11-19 07:44:35,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:35,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:35,970 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 07:44:35,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 259 treesize of output 247 [2022-11-19 07:44:36,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:44:36,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:44:36,136 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:44:36,505 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1111#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (not (<= (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#dst~0#1.base|))) (= |#NULL.base| 0))' at error location [2022-11-19 07:44:36,505 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:44:36,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:44:36,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-11-19 07:44:36,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103731130] [2022-11-19 07:44:36,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:44:36,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 07:44:36,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:36,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 07:44:36,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=314, Unknown=0, NotChecked=0, Total=552 [2022-11-19 07:44:36,507 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:36,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:36,906 INFO L93 Difference]: Finished difference Result 329 states and 345 transitions. [2022-11-19 07:44:36,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 07:44:36,907 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-19 07:44:36,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:36,908 INFO L225 Difference]: With dead ends: 329 [2022-11-19 07:44:36,908 INFO L226 Difference]: Without dead ends: 329 [2022-11-19 07:44:36,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=238, Invalid=314, Unknown=0, NotChecked=0, Total=552 [2022-11-19 07:44:36,909 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 594 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:36,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [594 Valid, 145 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:44:36,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-11-19 07:44:36,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 51. [2022-11-19 07:44:36,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 50 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:36,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2022-11-19 07:44:36,915 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 18 [2022-11-19 07:44:36,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:36,916 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2022-11-19 07:44:36,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:36,916 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2022-11-19 07:44:36,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-19 07:44:36,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:36,917 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2022-11-19 07:44:36,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:44:37,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:37,118 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-19 07:44:37,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:37,118 INFO L85 PathProgramCache]: Analyzing trace with hash -596088476, now seen corresponding path program 2 times [2022-11-19 07:44:37,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:37,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737645124] [2022-11-19 07:44:37,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:37,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:37,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:37,504 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:37,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:37,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737645124] [2022-11-19 07:44:37,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737645124] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:44:37,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829145602] [2022-11-19 07:44:37,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:44:37,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:37,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:44:37,511 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:44:37,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:44:37,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-19 07:44:37,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:44:37,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:44:37,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:44:37,606 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:44:37,607 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-19 07:44:37,769 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-11-19 07:44:37,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:44:37,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829145602] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:44:37,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:44:37,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [16] total 18 [2022-11-19 07:44:37,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232042152] [2022-11-19 07:44:37,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:44:37,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:44:37,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:37,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:44:37,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:44:37,772 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:37,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:37,817 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2022-11-19 07:44:37,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:44:37,818 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-19 07:44:37,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:37,818 INFO L225 Difference]: With dead ends: 65 [2022-11-19 07:44:37,818 INFO L226 Difference]: Without dead ends: 65 [2022-11-19 07:44:37,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:44:37,819 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 47 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:37,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 17 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:44:37,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-19 07:44:37,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2022-11-19 07:44:37,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 56 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:37,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2022-11-19 07:44:37,824 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 34 [2022-11-19 07:44:37,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:37,824 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2022-11-19 07:44:37,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:37,825 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2022-11-19 07:44:37,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-19 07:44:37,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:37,826 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2022-11-19 07:44:37,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:44:38,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:38,036 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-19 07:44:38,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:38,036 INFO L85 PathProgramCache]: Analyzing trace with hash -596090076, now seen corresponding path program 1 times [2022-11-19 07:44:38,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:38,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950947908] [2022-11-19 07:44:38,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:38,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:38,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:38,183 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-11-19 07:44:38,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:38,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950947908] [2022-11-19 07:44:38,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950947908] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:44:38,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698943006] [2022-11-19 07:44:38,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:38,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:38,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:44:38,185 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:44:38,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:44:38,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:38,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:44:38,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:44:38,502 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:38,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:44:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:38,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698943006] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:44:38,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1762122862] [2022-11-19 07:44:38,957 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:44:38,957 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:44:38,958 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:44:38,958 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:44:38,958 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:44:38,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:38,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:38,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:38,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:38,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:38,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-19 07:44:39,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:39,034 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 31 treesize of output 33 [2022-11-19 07:44:39,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:39,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:39,138 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 07:44:39,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 259 treesize of output 247 [2022-11-19 07:44:39,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:44:39,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:44:39,328 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:44:39,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1762122862] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:44:39,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:44:39,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 16, 16] total 39 [2022-11-19 07:44:39,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528951810] [2022-11-19 07:44:39,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:44:39,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:44:39,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:39,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:44:39,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=883, Unknown=0, NotChecked=0, Total=1560 [2022-11-19 07:44:39,612 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:39,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:39,744 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2022-11-19 07:44:39,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:44:39,744 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-19 07:44:39,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:39,745 INFO L225 Difference]: With dead ends: 74 [2022-11-19 07:44:39,745 INFO L226 Difference]: Without dead ends: 74 [2022-11-19 07:44:39,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=713, Invalid=927, Unknown=0, NotChecked=0, Total=1640 [2022-11-19 07:44:39,747 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 47 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:39,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 32 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:44:39,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-19 07:44:39,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 59. [2022-11-19 07:44:39,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 58 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:39,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2022-11-19 07:44:39,750 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 34 [2022-11-19 07:44:39,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:39,751 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2022-11-19 07:44:39,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:39,751 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2022-11-19 07:44:39,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-19 07:44:39,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:39,752 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:44:39,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:44:39,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 07:44:39,958 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-19 07:44:39,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:39,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1298872181, now seen corresponding path program 1 times [2022-11-19 07:44:39,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:39,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664289257] [2022-11-19 07:44:39,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:39,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:39,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:40,340 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:44:40,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:40,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664289257] [2022-11-19 07:44:40,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664289257] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:44:40,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324468050] [2022-11-19 07:44:40,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:40,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:40,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:44:40,342 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:44:40,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:44:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:40,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:44:40,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:44:40,507 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:44:40,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:44:40,864 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:44:40,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324468050] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:44:40,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [50686032] [2022-11-19 07:44:40,866 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:44:40,866 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:44:40,866 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:44:40,867 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:44:40,867 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:44:40,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-19 07:44:40,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,921 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 31 treesize of output 33 [2022-11-19 07:44:40,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:41,005 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 07:44:41,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 259 treesize of output 247 [2022-11-19 07:44:41,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:44:41,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:44:41,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:41,183 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:44:41,183 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 39 treesize of output 29 [2022-11-19 07:44:41,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:41,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:41,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:41,259 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:44:41,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 111 [2022-11-19 07:44:41,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:41,309 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:44:41,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:44:41,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:41,342 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:44:41,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:44:41,364 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:44:42,064 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2348#(and (or (= |ULTIMATE.start_main_~i~0#1| 0) (and (<= (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#dst~0#1.base|)) (= (select |#valid| |ULTIMATE.start_main_~#dst~0#1.base|) 1) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4)))))) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (<= 0 |ULTIMATE.start_main_~#src~0#1.offset|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#dst~0#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (<= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|))) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-19 07:44:42,064 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:44:42,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:44:42,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2022-11-19 07:44:42,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503702486] [2022-11-19 07:44:42,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:44:42,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-19 07:44:42,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:42,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-19 07:44:42,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=863, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 07:44:42,067 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:42,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:42,981 INFO L93 Difference]: Finished difference Result 680 states and 712 transitions. [2022-11-19 07:44:42,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-19 07:44:42,982 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-19 07:44:42,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:42,985 INFO L225 Difference]: With dead ends: 680 [2022-11-19 07:44:42,985 INFO L226 Difference]: Without dead ends: 680 [2022-11-19 07:44:42,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=543, Invalid=863, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 07:44:42,986 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1365 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1365 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:42,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1365 Valid, 289 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:44:42,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-11-19 07:44:43,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 91. [2022-11-19 07:44:43,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 85 states have (on average 1.1294117647058823) internal successors, (96), 90 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:43,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2022-11-19 07:44:43,006 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 35 [2022-11-19 07:44:43,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:43,006 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2022-11-19 07:44:43,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:43,007 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2022-11-19 07:44:43,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-19 07:44:43,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:43,008 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:44:43,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:44:43,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 07:44:43,209 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-19 07:44:43,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:43,210 INFO L85 PathProgramCache]: Analyzing trace with hash -532054741, now seen corresponding path program 2 times [2022-11-19 07:44:43,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:43,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487742161] [2022-11-19 07:44:43,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:43,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:43,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:44:44,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:44,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487742161] [2022-11-19 07:44:44,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487742161] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:44:44,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169764016] [2022-11-19 07:44:44,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:44:44,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:44,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:44:44,323 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:44:44,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:44:44,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 07:44:44,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:44:44,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:44:44,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:44:44,612 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2022-11-19 07:44:44,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:44:44,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-19 07:44:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2022-11-19 07:44:44,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169764016] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:44:44,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [510877532] [2022-11-19 07:44:44,893 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:44:44,893 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:44:44,893 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:44:44,894 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:44:44,894 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:44:44,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:44,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:44,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:44,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:44,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:44,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-19 07:44:44,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:44,950 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 26 treesize of output 28 [2022-11-19 07:44:45,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:45,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:45,050 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 07:44:45,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 249 treesize of output 248 [2022-11-19 07:44:45,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:44:45,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:44:45,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:45,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:45,285 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:44:45,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 49 [2022-11-19 07:44:45,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:45,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:45,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:45,527 INFO L321 Elim1Store]: treesize reduction 225, result has 14.1 percent of original size [2022-11-19 07:44:45,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 225 treesize of output 191 [2022-11-19 07:44:45,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:45,618 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:44:45,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:44:45,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:45,648 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:44:45,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:44:45,691 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:44:46,660 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3561#(and (<= (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#dst~0#1.base|)) (<= 0 |#NULL.base|) (= (select |#valid| |ULTIMATE.start_main_~#dst~0#1.base|) 1) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (<= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (<= 0 |ULTIMATE.start_main_~#src~0#1.offset|) (<= |#NULL.offset| 0) (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (<= 0 |ULTIMATE.start_main_~#dst~0#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (<= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 4 (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) (not (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|))) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-19 07:44:46,661 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:44:46,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:44:46,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 4, 4] total 40 [2022-11-19 07:44:46,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573546639] [2022-11-19 07:44:46,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:44:46,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-19 07:44:46,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:46,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-19 07:44:46,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=691, Invalid=1471, Unknown=0, NotChecked=0, Total=2162 [2022-11-19 07:44:46,663 INFO L87 Difference]: Start difference. First operand 91 states and 96 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:50,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:50,376 INFO L93 Difference]: Finished difference Result 730 states and 766 transitions. [2022-11-19 07:44:50,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-19 07:44:50,376 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-19 07:44:50,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:50,381 INFO L225 Difference]: With dead ends: 730 [2022-11-19 07:44:50,381 INFO L226 Difference]: Without dead ends: 730 [2022-11-19 07:44:50,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2777 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3742, Invalid=8468, Unknown=0, NotChecked=0, Total=12210 [2022-11-19 07:44:50,386 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 2994 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 465 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2994 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 465 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:50,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2994 Valid, 285 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [465 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 07:44:50,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-11-19 07:44:50,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 120. [2022-11-19 07:44:50,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 114 states have (on average 1.2017543859649122) internal successors, (137), 119 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:50,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 137 transitions. [2022-11-19 07:44:50,396 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 137 transitions. Word has length 67 [2022-11-19 07:44:50,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:50,397 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 137 transitions. [2022-11-19 07:44:50,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:50,397 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 137 transitions. [2022-11-19 07:44:50,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-19 07:44:50,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:50,399 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:44:50,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:44:50,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 07:44:50,604 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-19 07:44:50,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:50,604 INFO L85 PathProgramCache]: Analyzing trace with hash -279830977, now seen corresponding path program 1 times [2022-11-19 07:44:50,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:50,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589198418] [2022-11-19 07:44:50,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:50,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:51,651 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:51,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:51,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589198418] [2022-11-19 07:44:51,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589198418] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:44:51,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944330420] [2022-11-19 07:44:51,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:51,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:51,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:44:51,653 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:44:51,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:44:51,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:51,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-19 07:44:51,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:44:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:51,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:44:53,500 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:53,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944330420] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:44:53,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1467459243] [2022-11-19 07:44:53,502 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-19 07:44:53,502 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:44:53,503 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:44:53,503 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:44:53,503 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:44:53,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:53,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:53,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:53,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:53,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:53,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-19 07:44:53,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:53,556 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 31 treesize of output 33 [2022-11-19 07:44:53,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:53,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:53,647 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 07:44:53,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 259 treesize of output 247 [2022-11-19 07:44:53,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:44:53,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:44:53,813 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:44:53,814 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 2 case distinctions, treesize of input 15 treesize of output 14 [2022-11-19 07:44:53,828 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:44:54,286 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5032#(and (= |ULTIMATE.start_main_~i~0#1| 0) (exists ((|v_ULTIMATE.start_main_~#src~0#1.base_26| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#src~0#1.base_26|) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#src~0#1.base_26|) (* |ULTIMATE.start_main_~i~0#1| 4)) 0) (<= 4 (select |#length| |v_ULTIMATE.start_main_~#src~0#1.base_26|)) (= 0 (select (select |#memory_int| |v_ULTIMATE.start_main_~#src~0#1.base_26|) 0)) (<= (+ (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |v_ULTIMATE.start_main_~#src~0#1.base_26|)) (= (select |#valid| |v_ULTIMATE.start_main_~#src~0#1.base_26|) 0))) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:44:54,287 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:44:54,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:44:54,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-19 07:44:54,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244263713] [2022-11-19 07:44:54,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:44:54,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-19 07:44:54,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:54,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-19 07:44:54,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2627, Invalid=2923, Unknown=0, NotChecked=0, Total=5550 [2022-11-19 07:44:54,290 INFO L87 Difference]: Start difference. First operand 120 states and 137 transitions. Second operand has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:57,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:57,382 INFO L93 Difference]: Finished difference Result 1443 states and 1517 transitions. [2022-11-19 07:44:57,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-19 07:44:57,383 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-19 07:44:57,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:57,388 INFO L225 Difference]: With dead ends: 1443 [2022-11-19 07:44:57,388 INFO L226 Difference]: Without dead ends: 1443 [2022-11-19 07:44:57,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 169 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1348 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2627, Invalid=2923, Unknown=0, NotChecked=0, Total=5550 [2022-11-19 07:44:57,390 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 4024 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 798 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4024 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 1642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 798 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:57,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4024 Valid, 586 Invalid, 1642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [798 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-19 07:44:57,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2022-11-19 07:44:57,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 186. [2022-11-19 07:44:57,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 180 states have (on average 1.1277777777777778) internal successors, (203), 185 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:57,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 203 transitions. [2022-11-19 07:44:57,405 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 203 transitions. Word has length 71 [2022-11-19 07:44:57,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:57,405 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 203 transitions. [2022-11-19 07:44:57,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:57,406 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 203 transitions. [2022-11-19 07:44:57,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-19 07:44:57,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:57,408 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:44:57,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:44:57,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:57,614 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-19 07:44:57,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:57,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1822331767, now seen corresponding path program 2 times [2022-11-19 07:44:57,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:57,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453347635] [2022-11-19 07:44:57,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:57,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:57,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:45:01,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:45:01,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:45:01,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453347635] [2022-11-19 07:45:01,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453347635] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:45:01,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812283882] [2022-11-19 07:45:01,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:45:01,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:45:01,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:45:01,400 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:45:01,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:45:01,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-19 07:45:01,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:45:01,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:45:01,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:45:02,587 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_913 Int) (v_ArrVal_912 Int) (|v_ULTIMATE.start_main_~#src~0#1.base_27| Int) (v_ArrVal_911 Int) (|v_ULTIMATE.start_main_~#dst~0#1.base_16| Int)) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#src~0#1.base_27|) 0) (= |c_#valid| (store (store (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#src~0#1.base_27| v_ArrVal_913) |v_ULTIMATE.start_main_~#dst~0#1.base_16| v_ArrVal_912) |v_ULTIMATE.start_main_~#src~0#1.base_27| 0) |v_ULTIMATE.start_main_~#dst~0#1.base_16| 0)) (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#src~0#1.base_27| v_ArrVal_911) |v_ULTIMATE.start_main_~#dst~0#1.base_16|) 0))) is different from true [2022-11-19 07:45:02,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4096 trivial. 0 not checked. [2022-11-19 07:45:02,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:45:02,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812283882] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:45:02,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:45:02,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [66] total 68 [2022-11-19 07:45:02,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969738698] [2022-11-19 07:45:02,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:45:02,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:45:02,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:45:02,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:45:02,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2215, Invalid=2344, Unknown=1, NotChecked=132, Total=4692 [2022-11-19 07:45:02,595 INFO L87 Difference]: Start difference. First operand 186 states and 203 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:45:02,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:45:02,606 INFO L93 Difference]: Finished difference Result 192 states and 209 transitions. [2022-11-19 07:45:02,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:45:02,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2022-11-19 07:45:02,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:45:02,609 INFO L225 Difference]: With dead ends: 192 [2022-11-19 07:45:02,609 INFO L226 Difference]: Without dead ends: 190 [2022-11-19 07:45:02,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2215, Invalid=2344, Unknown=1, NotChecked=132, Total=4692 [2022-11-19 07:45:02,614 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:45:02,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 24 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 37 Unchecked, 0.0s Time] [2022-11-19 07:45:02,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-11-19 07:45:02,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2022-11-19 07:45:02,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 183 states have (on average 1.1256830601092895) internal successors, (206), 188 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:45:02,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 206 transitions. [2022-11-19 07:45:02,623 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 206 transitions. Word has length 137 [2022-11-19 07:45:02,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:45:02,624 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 206 transitions. [2022-11-19 07:45:02,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:45:02,625 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 206 transitions. [2022-11-19 07:45:02,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-11-19 07:45:02,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:45:02,634 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 2, 2, 2, 1, 1, 1, 1] [2022-11-19 07:45:02,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-19 07:45:02,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 07:45:02,840 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-19 07:45:02,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:45:02,840 INFO L85 PathProgramCache]: Analyzing trace with hash 861527848, now seen corresponding path program 1 times [2022-11-19 07:45:02,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:45:02,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906530442] [2022-11-19 07:45:02,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:45:02,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:45:02,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:45:06,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:45:06,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:45:06,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906530442] [2022-11-19 07:45:06,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906530442] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:45:06,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189348718] [2022-11-19 07:45:06,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:45:06,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:45:06,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:45:06,461 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:45:06,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:45:06,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:45:06,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-19 07:45:06,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:45:06,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:45:06,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:45:12,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:45:12,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189348718] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:45:12,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [215639903] [2022-11-19 07:45:12,354 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:45:12,355 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:45:12,355 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:45:12,355 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:45:12,355 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:45:12,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:12,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:12,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:12,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:12,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:12,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-19 07:45:12,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:12,407 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 31 treesize of output 33 [2022-11-19 07:45:12,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:12,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:12,504 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 07:45:12,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 259 treesize of output 247 [2022-11-19 07:45:12,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:45:12,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:45:12,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:45:12,658 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:45:12,658 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 39 treesize of output 29 [2022-11-19 07:45:12,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:12,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:45:12,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:45:12,727 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:45:12,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 111 [2022-11-19 07:45:12,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:45:12,776 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:45:12,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:45:12,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:45:12,810 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:45:12,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:45:12,820 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:45:13,732 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8482#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (not (<= (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#dst~0#1.base|))) (= |#NULL.base| 0))' at error location [2022-11-19 07:45:13,733 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:45:13,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:45:13,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 132 [2022-11-19 07:45:13,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894705783] [2022-11-19 07:45:13,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:45:13,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-11-19 07:45:13,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:45:13,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-11-19 07:45:13,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8793, Invalid=10113, Unknown=0, NotChecked=0, Total=18906 [2022-11-19 07:45:13,744 INFO L87 Difference]: Start difference. First operand 189 states and 206 transitions. Second operand has 133 states, 133 states have (on average 2.0150375939849625) internal successors, (268), 132 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:45:36,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:45:36,322 INFO L93 Difference]: Finished difference Result 2897 states and 3037 transitions. [2022-11-19 07:45:36,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-11-19 07:45:36,323 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.0150375939849625) internal successors, (268), 132 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2022-11-19 07:45:36,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:45:36,336 INFO L225 Difference]: With dead ends: 2897 [2022-11-19 07:45:36,336 INFO L226 Difference]: Without dead ends: 2897 [2022-11-19 07:45:36,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 338 SyntacticMatches, 4 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=8793, Invalid=10113, Unknown=0, NotChecked=0, Total=18906 [2022-11-19 07:45:36,339 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 9246 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 1704 mSolverCounterSat, 1735 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9246 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 3439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1735 IncrementalHoareTripleChecker+Valid, 1704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:45:36,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9246 Valid, 1180 Invalid, 3439 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1735 Valid, 1704 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-19 07:45:36,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2022-11-19 07:45:36,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 321. [2022-11-19 07:45:36,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 315 states have (on average 1.073015873015873) internal successors, (338), 320 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:45:36,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 338 transitions. [2022-11-19 07:45:36,364 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 338 transitions. Word has length 138 [2022-11-19 07:45:36,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:45:36,364 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 338 transitions. [2022-11-19 07:45:36,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 2.0150375939849625) internal successors, (268), 132 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:45:36,365 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 338 transitions. [2022-11-19 07:45:36,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-11-19 07:45:36,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:45:36,369 INFO L195 NwaCegarLoop]: trace histogram [130, 130, 2, 2, 2, 1, 1, 1, 1] [2022-11-19 07:45:36,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:45:36,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 07:45:36,579 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-19 07:45:36,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:45:36,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1119712404, now seen corresponding path program 2 times [2022-11-19 07:45:36,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:45:36,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534281341] [2022-11-19 07:45:36,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:45:36,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:45:36,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:45:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16904 backedges. 0 proven. 16900 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:45:49,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:45:49,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534281341] [2022-11-19 07:45:49,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534281341] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:45:49,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27416317] [2022-11-19 07:45:49,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:45:49,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:45:49,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:45:49,301 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:45:49,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 07:45:49,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-19 07:45:49,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:45:49,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:45:49,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:45:49,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 07:45:49,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-19 07:45:53,388 INFO L134 CoverageAnalysis]: Checked inductivity of 16904 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16901 trivial. 0 not checked. [2022-11-19 07:45:53,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:45:58,563 INFO L134 CoverageAnalysis]: Checked inductivity of 16904 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16901 trivial. 0 not checked. [2022-11-19 07:45:58,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27416317] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:45:58,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [394821725] [2022-11-19 07:45:58,565 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:45:58,566 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:45:58,566 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:45:58,566 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:45:58,566 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:45:58,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:58,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:58,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:58,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:58,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:58,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-19 07:45:58,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:58,613 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 31 treesize of output 33 [2022-11-19 07:45:58,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:58,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:58,690 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 07:45:58,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 259 treesize of output 247 [2022-11-19 07:45:58,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:45:58,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:45:58,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:45:58,846 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:45:58,846 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 39 treesize of output 29 [2022-11-19 07:45:58,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:58,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:45:58,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:45:58,915 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:45:58,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 111 [2022-11-19 07:45:58,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:45:58,967 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:45:58,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:45:58,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:45:58,997 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:45:58,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:45:59,006 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:46:00,446 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13456#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (not (<= (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#dst~0#1.base|))) (= |#NULL.base| 0))' at error location [2022-11-19 07:46:00,446 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:46:00,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:46:00,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 2, 2] total 136 [2022-11-19 07:46:00,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672339296] [2022-11-19 07:46:00,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:46:00,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-11-19 07:46:00,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:00,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-11-19 07:46:00,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8803, Invalid=11219, Unknown=0, NotChecked=0, Total=20022 [2022-11-19 07:46:00,453 INFO L87 Difference]: Start difference. First operand 321 states and 338 transitions. Second operand has 137 states, 137 states have (on average 2.124087591240876) internal successors, (291), 136 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:46:18,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:18,195 INFO L93 Difference]: Finished difference Result 324 states and 338 transitions. [2022-11-19 07:46:18,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-11-19 07:46:18,196 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.124087591240876) internal successors, (291), 136 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 270 [2022-11-19 07:46:18,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:18,198 INFO L225 Difference]: With dead ends: 324 [2022-11-19 07:46:18,198 INFO L226 Difference]: Without dead ends: 324 [2022-11-19 07:46:18,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1074 GetRequests, 796 SyntacticMatches, 4 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11032 ImplicationChecksByTransitivity, 25.8s TimeCoverageRelationStatistics Valid=27032, Invalid=48868, Unknown=0, NotChecked=0, Total=75900 [2022-11-19 07:46:18,206 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 304 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:46:18,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 73 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 338 Invalid, 0 Unknown, 22 Unchecked, 0.5s Time] [2022-11-19 07:46:18,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-11-19 07:46:18,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 318. [2022-11-19 07:46:18,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 314 states have (on average 1.0477707006369428) internal successors, (329), 317 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:46:18,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 329 transitions. [2022-11-19 07:46:18,213 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 329 transitions. Word has length 270 [2022-11-19 07:46:18,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:18,213 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 329 transitions. [2022-11-19 07:46:18,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 2.124087591240876) internal successors, (291), 136 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:46:18,214 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 329 transitions. [2022-11-19 07:46:18,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-11-19 07:46:18,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:18,217 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:46:18,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 07:46:18,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 07:46:18,423 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-19 07:46:18,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:18,423 INFO L85 PathProgramCache]: Analyzing trace with hash 514028516, now seen corresponding path program 1 times [2022-11-19 07:46:18,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:18,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032823488] [2022-11-19 07:46:18,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:18,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:30,760 INFO L134 CoverageAnalysis]: Checked inductivity of 17161 backedges. 0 proven. 17161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:46:30,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:30,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032823488] [2022-11-19 07:46:30,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032823488] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:46:30,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905305878] [2022-11-19 07:46:30,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:30,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:30,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:46:30,762 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:46:30,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 07:46:31,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:31,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 1790 conjuncts, 133 conjunts are in the unsatisfiable core [2022-11-19 07:46:31,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:46:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 17161 backedges. 0 proven. 17161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:46:31,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:46:52,868 INFO L134 CoverageAnalysis]: Checked inductivity of 17161 backedges. 0 proven. 17161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:46:52,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905305878] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:46:52,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1324267322] [2022-11-19 07:46:52,871 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-19 07:46:52,872 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:46:52,872 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:46:52,872 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:46:52,872 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:46:52,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:52,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:52,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:52,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:52,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:52,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-19 07:46:52,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:52,931 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 31 treesize of output 33 [2022-11-19 07:46:52,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:52,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:53,006 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 07:46:53,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 259 treesize of output 247 [2022-11-19 07:46:53,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:46:53,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:46:53,133 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:46:53,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1324267322] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:46:53,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:46:53,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [133, 133, 133] total 272 [2022-11-19 07:46:53,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638993005] [2022-11-19 07:46:53,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:46:53,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:46:53,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:53,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:46:53,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36592, Invalid=37664, Unknown=0, NotChecked=0, Total=74256 [2022-11-19 07:46:53,654 INFO L87 Difference]: Start difference. First operand 318 states and 329 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:46:53,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:53,769 INFO L93 Difference]: Finished difference Result 328 states and 339 transitions. [2022-11-19 07:46:53,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:46:53,770 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 273 [2022-11-19 07:46:53,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:53,771 INFO L225 Difference]: With dead ends: 328 [2022-11-19 07:46:53,772 INFO L226 Difference]: Without dead ends: 325 [2022-11-19 07:46:53,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 951 GetRequests, 678 SyntacticMatches, 1 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3957 ImplicationChecksByTransitivity, 28.4s TimeCoverageRelationStatistics Valid=36862, Invalid=37940, Unknown=0, NotChecked=0, Total=74802 [2022-11-19 07:46:53,777 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 31 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:46:53,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 34 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:46:53,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-11-19 07:46:53,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 315. [2022-11-19 07:46:53,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 311 states have (on average 1.045016077170418) internal successors, (325), 314 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:46:53,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 325 transitions. [2022-11-19 07:46:53,784 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 325 transitions. Word has length 273 [2022-11-19 07:46:53,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:53,785 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 325 transitions. [2022-11-19 07:46:53,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:46:53,785 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 325 transitions. [2022-11-19 07:46:53,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-11-19 07:46:53,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:53,789 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:46:53,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 07:46:53,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 07:46:53,997 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-19 07:46:53,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:53,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1949300369, now seen corresponding path program 1 times [2022-11-19 07:46:53,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:53,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877657890] [2022-11-19 07:46:53,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:53,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:54,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:05,575 INFO L134 CoverageAnalysis]: Checked inductivity of 17163 backedges. 0 proven. 17161 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:47:05,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:05,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877657890] [2022-11-19 07:47:05,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877657890] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:47:05,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959389915] [2022-11-19 07:47:05,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:05,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:05,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:05,583 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:47:05,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 07:47:06,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:06,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 1803 conjuncts, 133 conjunts are in the unsatisfiable core [2022-11-19 07:47:06,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:06,528 INFO L134 CoverageAnalysis]: Checked inductivity of 17163 backedges. 0 proven. 17161 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:47:06,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:27,827 INFO L134 CoverageAnalysis]: Checked inductivity of 17163 backedges. 0 proven. 17161 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:47:27,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959389915] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:47:27,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [699865673] [2022-11-19 07:47:27,830 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-19 07:47:27,830 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:47:27,830 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:47:27,831 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:47:27,831 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:47:27,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:27,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:27,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:27,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:27,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:27,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-19 07:47:27,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:27,881 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 26 treesize of output 28 [2022-11-19 07:47:27,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:27,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:47:27,972 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 07:47:27,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 249 treesize of output 248 [2022-11-19 07:47:28,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:47:28,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:47:28,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:28,183 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:47:28,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2022-11-19 07:47:28,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:47:28,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:47:28,426 INFO L321 Elim1Store]: treesize reduction 271, result has 21.7 percent of original size [2022-11-19 07:47:28,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 208 treesize of output 203 [2022-11-19 07:47:28,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:47:28,594 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:47:28,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:47:28,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:47:28,625 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:47:28,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:47:28,657 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:47:28,657 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 2 case distinctions, treesize of input 15 treesize of output 14 [2022-11-19 07:47:28,668 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:47:30,159 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18832#(and (= |ULTIMATE.start_main_~i~0#1| 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (exists ((|v_ULTIMATE.start_main_~#src~0#1.base_28| Int)) (and (= (select |#valid| |v_ULTIMATE.start_main_~#src~0#1.base_28|) 0) (<= (+ (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |v_ULTIMATE.start_main_~#src~0#1.base_28|)) (<= 0 |v_ULTIMATE.start_main_~#src~0#1.base_28|) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#src~0#1.base_28|) (* |ULTIMATE.start_main_~i~0#1| 4)) 0))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:47:30,159 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:47:30,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:47:30,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133, 133] total 266 [2022-11-19 07:47:30,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502485587] [2022-11-19 07:47:30,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:47:30,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 267 states [2022-11-19 07:47:30,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:30,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 267 interpolants. [2022-11-19 07:47:30,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36866, Invalid=39586, Unknown=0, NotChecked=0, Total=76452 [2022-11-19 07:47:30,170 INFO L87 Difference]: Start difference. First operand 315 states and 325 transitions. Second operand has 267 states, 267 states have (on average 2.0262172284644193) internal successors, (541), 266 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:38,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:51:38,621 INFO L93 Difference]: Finished difference Result 5314 states and 5585 transitions. [2022-11-19 07:51:38,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 266 states. [2022-11-19 07:51:38,622 INFO L78 Accepts]: Start accepts. Automaton has has 267 states, 267 states have (on average 2.0262172284644193) internal successors, (541), 266 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 275 [2022-11-19 07:51:38,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:51:38,638 INFO L225 Difference]: With dead ends: 5314 [2022-11-19 07:51:38,638 INFO L226 Difference]: Without dead ends: 5314 [2022-11-19 07:51:38,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 681 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5158 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=36866, Invalid=39586, Unknown=0, NotChecked=0, Total=76452 [2022-11-19 07:51:38,643 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 22204 mSDsluCounter, 2385 mSDsCounter, 0 mSdLazyCounter, 2925 mSolverCounterSat, 3938 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22204 SdHoareTripleChecker+Valid, 2395 SdHoareTripleChecker+Invalid, 6863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 3938 IncrementalHoareTripleChecker+Valid, 2925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:51:38,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22204 Valid, 2395 Invalid, 6863 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [3938 Valid, 2925 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-11-19 07:51:38,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5314 states. [2022-11-19 07:51:38,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5314 to 581. [2022-11-19 07:51:38,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 577 states have (on average 1.024263431542461) internal successors, (591), 580 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:38,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 591 transitions. [2022-11-19 07:51:38,677 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 591 transitions. Word has length 275 [2022-11-19 07:51:38,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:51:38,678 INFO L495 AbstractCegarLoop]: Abstraction has 581 states and 591 transitions. [2022-11-19 07:51:38,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 267 states, 267 states have (on average 2.0262172284644193) internal successors, (541), 266 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:38,679 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 591 transitions. [2022-11-19 07:51:38,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2022-11-19 07:51:38,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:51:38,691 INFO L195 NwaCegarLoop]: trace histogram [264, 264, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:51:38,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-19 07:51:38,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:51:38,907 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-19 07:51:38,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:51:38,907 INFO L85 PathProgramCache]: Analyzing trace with hash 156820385, now seen corresponding path program 2 times [2022-11-19 07:51:38,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:51:38,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212593210] [2022-11-19 07:51:38,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:38,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:51:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 69698 backedges. 0 proven. 69696 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:52:29,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:52:29,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212593210] [2022-11-19 07:52:29,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212593210] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:52:29,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932179573] [2022-11-19 07:52:29,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:52:29,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:52:29,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:52:29,579 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:52:29,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 07:52:29,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-19 07:52:29,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:52:29,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:52:29,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:52:34,549 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#src~0#1.base_29| Int) (v_ArrVal_3874 Int) (v_ArrVal_3875 Int) (v_ArrVal_3873 Int) (|v_ULTIMATE.start_main_~#dst~0#1.base_18| Int)) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#src~0#1.base_29|) 0) (= |c_#valid| (store (store (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#src~0#1.base_29| v_ArrVal_3875) |v_ULTIMATE.start_main_~#dst~0#1.base_18| v_ArrVal_3873) |v_ULTIMATE.start_main_~#src~0#1.base_29| 0) |v_ULTIMATE.start_main_~#dst~0#1.base_18| 0)) (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#src~0#1.base_29| v_ArrVal_3874) |v_ULTIMATE.start_main_~#dst~0#1.base_18|) 0))) is different from true [2022-11-19 07:52:34,557 INFO L134 CoverageAnalysis]: Checked inductivity of 69698 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 69698 trivial. 0 not checked. [2022-11-19 07:52:34,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:52:34,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932179573] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:52:34,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:52:34,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [266] total 268 [2022-11-19 07:52:34,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903018467] [2022-11-19 07:52:34,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:52:34,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:52:34,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:52:34,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:52:34,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35515, Invalid=36044, Unknown=1, NotChecked=532, Total=72092 [2022-11-19 07:52:34,566 INFO L87 Difference]: Start difference. First operand 581 states and 591 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:52:34,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:52:34,572 INFO L93 Difference]: Finished difference Result 586 states and 597 transitions. [2022-11-19 07:52:34,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:52:34,572 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 541 [2022-11-19 07:52:34,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:52:34,575 INFO L225 Difference]: With dead ends: 586 [2022-11-19 07:52:34,575 INFO L226 Difference]: Without dead ends: 584 [2022-11-19 07:52:34,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 806 GetRequests, 539 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 28.7s TimeCoverageRelationStatistics Valid=35515, Invalid=36044, Unknown=1, NotChecked=532, Total=72092 [2022-11-19 07:52:34,581 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:52:34,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 17 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2022-11-19 07:52:34,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-11-19 07:52:34,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 583. [2022-11-19 07:52:34,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 579 states have (on average 1.0241796200345423) internal successors, (593), 582 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:52:34,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 593 transitions. [2022-11-19 07:52:34,597 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 593 transitions. Word has length 541 [2022-11-19 07:52:34,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:52:34,598 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 593 transitions. [2022-11-19 07:52:34,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:52:34,599 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 593 transitions. [2022-11-19 07:52:34,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2022-11-19 07:52:34,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:52:34,602 INFO L195 NwaCegarLoop]: trace histogram [264, 264, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-19 07:52:34,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 07:52:34,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:52:34,808 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-19 07:52:34,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:52:34,809 INFO L85 PathProgramCache]: Analyzing trace with hash 2085700816, now seen corresponding path program 1 times [2022-11-19 07:52:34,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:52:34,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960192950] [2022-11-19 07:52:34,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:52:34,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:52:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:35,860 INFO L134 CoverageAnalysis]: Checked inductivity of 69704 backedges. 0 proven. 527 refuted. 0 times theorem prover too weak. 69177 trivial. 0 not checked. [2022-11-19 07:52:35,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:52:35,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960192950] [2022-11-19 07:52:35,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960192950] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:52:35,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684182609] [2022-11-19 07:52:35,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:52:35,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:52:35,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:52:35,863 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:52:35,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e03627a-7511-4b44-bfa7-1f0018d56c13/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 07:52:36,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:36,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 3540 conjuncts, 266 conjunts are in the unsatisfiable core [2022-11-19 07:52:36,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:53:06,403 INFO L134 CoverageAnalysis]: Checked inductivity of 69704 backedges. 0 proven. 69696 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:53:06,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:54:32,544 INFO L134 CoverageAnalysis]: Checked inductivity of 69704 backedges. 0 proven. 69696 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:54:32,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684182609] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:54:32,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1802241559] [2022-11-19 07:54:32,546 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:54:32,547 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:54:32,547 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:54:32,547 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:54:32,547 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:54:32,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:32,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:32,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:32,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:32,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:32,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-19 07:54:32,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:32,591 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 31 treesize of output 33 [2022-11-19 07:54:32,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:32,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:32,661 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 07:54:32,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 259 treesize of output 247 [2022-11-19 07:54:32,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:54:32,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:54:32,795 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:54:32,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-11-19 07:54:32,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:54:32,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:54:32,894 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 07:54:32,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 125 [2022-11-19 07:54:32,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:54:32,996 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:54:32,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:54:33,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:54:33,025 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:54:33,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:54:33,042 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:54:35,489 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31576#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |#NULL.offset| 0) (not (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:54:35,490 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:54:35,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:54:35,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 266, 266] total 534 [2022-11-19 07:54:35,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53517316] [2022-11-19 07:54:35,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:54:35,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 535 states [2022-11-19 07:54:35,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:54:35,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 535 interpolants. [2022-11-19 07:54:35,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143397, Invalid=148743, Unknown=0, NotChecked=0, Total=292140 [2022-11-19 07:54:35,533 INFO L87 Difference]: Start difference. First operand 583 states and 593 transitions. Second operand has 535 states, 535 states have (on average 2.0186915887850465) internal successors, (1080), 534 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)