./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext/tree_cnstr.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_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/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_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext/tree_cnstr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/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_1259c3a3-4974-4745-978b-a08bf1306e0b/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 ba983053090b7e7410066c63fe0cfe9ad27960a7dc19d54045684ba21359c88d --- 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 07:29:33,981 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:29:33,983 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:29:34,008 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:29:34,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:29:34,010 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:29:34,011 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:29:34,013 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:29:34,015 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:29:34,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:29:34,022 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:29:34,023 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:29:34,023 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:29:34,024 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:29:34,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:29:34,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:29:34,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:29:34,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:29:34,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:29:34,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:29:34,042 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:29:34,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:29:34,049 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:29:34,050 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:29:34,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:29:34,059 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:29:34,060 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:29:34,061 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:29:34,061 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:29:34,062 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:29:34,062 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:29:34,063 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:29:34,064 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:29:34,065 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:29:34,067 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:29:34,068 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:29:34,068 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:29:34,069 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:29:34,070 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:29:34,071 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:29:34,071 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:29:34,072 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 07:29:34,112 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:29:34,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:29:34,113 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:29:34,113 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:29:34,114 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:29:34,114 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:29:34,114 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:29:34,115 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:29:34,115 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:29:34,115 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:29:34,116 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:29:34,116 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:29:34,116 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:29:34,117 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:29:34,117 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:29:34,117 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:29:34,117 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:29:34,118 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:29:34,118 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 07:29:34,118 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 07:29:34,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:29:34,119 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:29:34,119 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 07:29:34,119 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:29:34,119 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:29:34,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:29:34,120 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 07:29:34,120 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 07:29:34,120 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 07:29:34,121 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:29:34,121 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:29:34,121 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:29:34,121 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:29:34,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:29:34,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:29:34,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:29:34,122 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:29:34,122 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:29:34,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:29:34,123 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:29:34,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:29:34,124 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:29:34,125 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_1259c3a3-4974-4745-978b-a08bf1306e0b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ba983053090b7e7410066c63fe0cfe9ad27960a7dc19d54045684ba21359c88d [2022-11-19 07:29:34,360 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:29:34,381 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:29:34,384 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:29:34,385 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:29:34,386 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:29:34,387 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/memsafety-ext/tree_cnstr.i [2022-11-19 07:29:34,455 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/data/c96efce7b/25538f5f921b4d5b906d4fe9818a377a/FLAG10e2cc059 [2022-11-19 07:29:35,060 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:29:35,061 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/sv-benchmarks/c/memsafety-ext/tree_cnstr.i [2022-11-19 07:29:35,073 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/data/c96efce7b/25538f5f921b4d5b906d4fe9818a377a/FLAG10e2cc059 [2022-11-19 07:29:35,346 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/data/c96efce7b/25538f5f921b4d5b906d4fe9818a377a [2022-11-19 07:29:35,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:29:35,349 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:29:35,357 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:29:35,358 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:29:35,365 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:29:35,366 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:29:35" (1/1) ... [2022-11-19 07:29:35,367 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78deee05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:35, skipping insertion in model container [2022-11-19 07:29:35,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:29:35" (1/1) ... [2022-11-19 07:29:35,375 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:29:35,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:29:35,751 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:29:35,761 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:29:35,825 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:29:35,862 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:29:35,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:35 WrapperNode [2022-11-19 07:29:35,863 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:29:35,864 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:29:35,864 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:29:35,864 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:29:35,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:35" (1/1) ... [2022-11-19 07:29:35,905 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:35" (1/1) ... [2022-11-19 07:29:35,940 INFO L138 Inliner]: procedures = 123, calls = 36, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 138 [2022-11-19 07:29:35,940 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:29:35,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:29:35,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:29:35,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:29:35,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:35" (1/1) ... [2022-11-19 07:29:35,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:35" (1/1) ... [2022-11-19 07:29:35,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:35" (1/1) ... [2022-11-19 07:29:35,953 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:35" (1/1) ... [2022-11-19 07:29:35,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:35" (1/1) ... [2022-11-19 07:29:35,964 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:35" (1/1) ... [2022-11-19 07:29:35,965 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:35" (1/1) ... [2022-11-19 07:29:35,966 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:35" (1/1) ... [2022-11-19 07:29:35,969 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:29:35,969 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:29:35,970 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:29:35,970 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:29:35,971 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:35" (1/1) ... [2022-11-19 07:29:35,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:29:36,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:36,018 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:29:36,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:29:36,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:29:36,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:29:36,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 07:29:36,059 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 07:29:36,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:29:36,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:29:36,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:29:36,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:29:36,170 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:29:36,172 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:29:36,761 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:29:36,868 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:29:36,868 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-19 07:29:36,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:29:36 BoogieIcfgContainer [2022-11-19 07:29:36,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:29:36,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:29:36,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:29:36,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:29:36,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:29:35" (1/3) ... [2022-11-19 07:29:36,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e790f89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:29:36, skipping insertion in model container [2022-11-19 07:29:36,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:35" (2/3) ... [2022-11-19 07:29:36,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e790f89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:29:36, skipping insertion in model container [2022-11-19 07:29:36,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:29:36" (3/3) ... [2022-11-19 07:29:36,885 INFO L112 eAbstractionObserver]: Analyzing ICFG tree_cnstr.i [2022-11-19 07:29:36,906 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:29:36,906 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 56 error locations. [2022-11-19 07:29:36,979 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:29:36,985 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;@626f91db, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:29:36,985 INFO L358 AbstractCegarLoop]: Starting to check reachability of 56 error locations. [2022-11-19 07:29:36,989 INFO L276 IsEmpty]: Start isEmpty. Operand has 102 states, 45 states have (on average 2.577777777777778) internal successors, (116), 101 states have internal predecessors, (116), 0 states have call successors, (0), 0 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 07:29:36,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 07:29:36,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:36,996 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 07:29:36,996 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-19 07:29:37,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:37,009 INFO L85 PathProgramCache]: Analyzing trace with hash 7909, now seen corresponding path program 1 times [2022-11-19 07:29:37,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:37,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455552349] [2022-11-19 07:29:37,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:37,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:37,203 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 07:29:37,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:37,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455552349] [2022-11-19 07:29:37,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455552349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:37,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:37,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:29:37,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044618852] [2022-11-19 07:29:37,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:37,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:29:37,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:37,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:29:37,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:29:37,242 INFO L87 Difference]: Start difference. First operand has 102 states, 45 states have (on average 2.577777777777778) internal successors, (116), 101 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:37,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:37,526 INFO L93 Difference]: Finished difference Result 139 states and 155 transitions. [2022-11-19 07:29:37,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:29:37,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-19 07:29:37,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:37,538 INFO L225 Difference]: With dead ends: 139 [2022-11-19 07:29:37,538 INFO L226 Difference]: Without dead ends: 137 [2022-11-19 07:29:37,540 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 07:29:37,546 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 106 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:37,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 76 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:29:37,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-19 07:29:37,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 99. [2022-11-19 07:29:37,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 45 states have (on average 2.4444444444444446) internal successors, (110), 98 states have internal predecessors, (110), 0 states have call successors, (0), 0 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 07:29:37,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 110 transitions. [2022-11-19 07:29:37,585 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 110 transitions. Word has length 2 [2022-11-19 07:29:37,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:37,585 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 110 transitions. [2022-11-19 07:29:37,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:37,586 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 110 transitions. [2022-11-19 07:29:37,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 07:29:37,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:37,586 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 07:29:37,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:29:37,587 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-19 07:29:37,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:37,588 INFO L85 PathProgramCache]: Analyzing trace with hash 7910, now seen corresponding path program 1 times [2022-11-19 07:29:37,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:37,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145896326] [2022-11-19 07:29:37,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:37,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:37,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:37,683 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 07:29:37,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:37,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145896326] [2022-11-19 07:29:37,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145896326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:37,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:37,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:29:37,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562760859] [2022-11-19 07:29:37,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:37,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:29:37,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:37,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:29:37,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:29:37,688 INFO L87 Difference]: Start difference. First operand 99 states and 110 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:37,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:37,863 INFO L93 Difference]: Finished difference Result 135 states and 151 transitions. [2022-11-19 07:29:37,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:29:37,863 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-19 07:29:37,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:37,865 INFO L225 Difference]: With dead ends: 135 [2022-11-19 07:29:37,865 INFO L226 Difference]: Without dead ends: 135 [2022-11-19 07:29:37,865 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 07:29:37,867 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 104 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:37,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 82 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:29:37,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-19 07:29:37,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 97. [2022-11-19 07:29:37,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 45 states have (on average 2.4) internal successors, (108), 96 states have internal predecessors, (108), 0 states have call successors, (0), 0 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 07:29:37,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2022-11-19 07:29:37,876 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 2 [2022-11-19 07:29:37,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:37,876 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2022-11-19 07:29:37,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:37,877 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2022-11-19 07:29:37,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:29:37,877 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:37,877 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:29:37,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:29:37,878 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-19 07:29:37,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:37,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1286538703, now seen corresponding path program 1 times [2022-11-19 07:29:37,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:37,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259199913] [2022-11-19 07:29:37,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:37,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:38,019 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 07:29:38,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:38,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259199913] [2022-11-19 07:29:38,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259199913] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:38,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:38,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:29:38,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456016356] [2022-11-19 07:29:38,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:38,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:29:38,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:38,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:29:38,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:29:38,026 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:38,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:38,264 INFO L93 Difference]: Finished difference Result 121 states and 138 transitions. [2022-11-19 07:29:38,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:29:38,265 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 07:29:38,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:38,270 INFO L225 Difference]: With dead ends: 121 [2022-11-19 07:29:38,270 INFO L226 Difference]: Without dead ends: 121 [2022-11-19 07:29:38,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:29:38,279 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 188 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:38,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 46 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:29:38,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-19 07:29:38,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 84. [2022-11-19 07:29:38,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 83 states have internal predecessors, (98), 0 states have call successors, (0), 0 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 07:29:38,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2022-11-19 07:29:38,287 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 6 [2022-11-19 07:29:38,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:38,287 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2022-11-19 07:29:38,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:38,288 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2022-11-19 07:29:38,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:29:38,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:38,288 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:29:38,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:29:38,289 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-19 07:29:38,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:38,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1286538702, now seen corresponding path program 1 times [2022-11-19 07:29:38,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:38,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078383834] [2022-11-19 07:29:38,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:38,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:38,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:38,499 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 07:29:38,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:38,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078383834] [2022-11-19 07:29:38,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078383834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:38,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:38,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:29:38,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850833016] [2022-11-19 07:29:38,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:38,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:29:38,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:38,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:29:38,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:29:38,505 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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 07:29:38,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:38,824 INFO L93 Difference]: Finished difference Result 182 states and 210 transitions. [2022-11-19 07:29:38,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:29:38,825 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 07:29:38,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:38,827 INFO L225 Difference]: With dead ends: 182 [2022-11-19 07:29:38,827 INFO L226 Difference]: Without dead ends: 182 [2022-11-19 07:29:38,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:29:38,839 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 205 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:38,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 76 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:29:38,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-19 07:29:38,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 135. [2022-11-19 07:29:38,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 99 states have (on average 1.9191919191919191) internal successors, (190), 134 states have internal predecessors, (190), 0 states have call successors, (0), 0 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 07:29:38,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 190 transitions. [2022-11-19 07:29:38,849 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 190 transitions. Word has length 6 [2022-11-19 07:29:38,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:38,850 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 190 transitions. [2022-11-19 07:29:38,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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 07:29:38,854 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 190 transitions. [2022-11-19 07:29:38,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:29:38,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:38,855 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:38,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:29:38,856 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-19 07:29:38,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:38,856 INFO L85 PathProgramCache]: Analyzing trace with hash 586937635, now seen corresponding path program 1 times [2022-11-19 07:29:38,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:38,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138715971] [2022-11-19 07:29:38,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:38,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:38,931 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 07:29:38,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:38,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138715971] [2022-11-19 07:29:38,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138715971] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:38,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:38,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:29:38,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222953101] [2022-11-19 07:29:38,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:38,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:29:38,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:38,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:29:38,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:29:38,937 INFO L87 Difference]: Start difference. First operand 135 states and 190 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) 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 07:29:38,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:38,991 INFO L93 Difference]: Finished difference Result 149 states and 188 transitions. [2022-11-19 07:29:38,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:29:38,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) 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 8 [2022-11-19 07:29:38,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:38,993 INFO L225 Difference]: With dead ends: 149 [2022-11-19 07:29:38,993 INFO L226 Difference]: Without dead ends: 149 [2022-11-19 07:29:38,997 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 07:29:38,998 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 83 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:38,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 106 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:29:39,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-19 07:29:39,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 135. [2022-11-19 07:29:39,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 99 states have (on average 1.898989898989899) internal successors, (188), 134 states have internal predecessors, (188), 0 states have call successors, (0), 0 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 07:29:39,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 188 transitions. [2022-11-19 07:29:39,029 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 188 transitions. Word has length 8 [2022-11-19 07:29:39,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:39,034 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 188 transitions. [2022-11-19 07:29:39,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) 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 07:29:39,035 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 188 transitions. [2022-11-19 07:29:39,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:29:39,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:39,036 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:39,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:29:39,037 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-19 07:29:39,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:39,038 INFO L85 PathProgramCache]: Analyzing trace with hash 451253929, now seen corresponding path program 1 times [2022-11-19 07:29:39,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:39,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118561258] [2022-11-19 07:29:39,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:39,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:39,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:39,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:39,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118561258] [2022-11-19 07:29:39,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118561258] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:39,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:39,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:29:39,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572145322] [2022-11-19 07:29:39,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:39,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:29:39,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:39,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:29:39,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:29:39,345 INFO L87 Difference]: Start difference. First operand 135 states and 188 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 07:29:39,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:39,602 INFO L93 Difference]: Finished difference Result 228 states and 296 transitions. [2022-11-19 07:29:39,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:29:39,603 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 07:29:39,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:39,604 INFO L225 Difference]: With dead ends: 228 [2022-11-19 07:29:39,604 INFO L226 Difference]: Without dead ends: 228 [2022-11-19 07:29:39,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:29:39,605 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 116 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:39,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 212 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:29:39,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-11-19 07:29:39,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 146. [2022-11-19 07:29:39,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 110 states have (on average 1.8363636363636364) internal successors, (202), 145 states have internal predecessors, (202), 0 states have call successors, (0), 0 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 07:29:39,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 202 transitions. [2022-11-19 07:29:39,614 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 202 transitions. Word has length 11 [2022-11-19 07:29:39,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:39,614 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 202 transitions. [2022-11-19 07:29:39,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 07:29:39,615 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 202 transitions. [2022-11-19 07:29:39,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 07:29:39,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:39,627 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:39,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:29:39,627 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-19 07:29:39,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:39,628 INFO L85 PathProgramCache]: Analyzing trace with hash -25059268, now seen corresponding path program 1 times [2022-11-19 07:29:39,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:39,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068861708] [2022-11-19 07:29:39,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:39,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:39,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:39,663 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 07:29:39,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:39,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068861708] [2022-11-19 07:29:39,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068861708] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:39,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:39,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:29:39,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716824668] [2022-11-19 07:29:39,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:39,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:29:39,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:39,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:29:39,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:29:39,666 INFO L87 Difference]: Start difference. First operand 146 states and 202 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:39,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:39,707 INFO L93 Difference]: Finished difference Result 149 states and 205 transitions. [2022-11-19 07:29:39,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:29:39,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 07:29:39,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:39,709 INFO L225 Difference]: With dead ends: 149 [2022-11-19 07:29:39,709 INFO L226 Difference]: Without dead ends: 149 [2022-11-19 07:29:39,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:29:39,711 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:39,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 143 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:29:39,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-19 07:29:39,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-11-19 07:29:39,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 113 states have (on average 1.8141592920353982) internal successors, (205), 148 states have internal predecessors, (205), 0 states have call successors, (0), 0 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 07:29:39,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 205 transitions. [2022-11-19 07:29:39,725 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 205 transitions. Word has length 12 [2022-11-19 07:29:39,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:39,725 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 205 transitions. [2022-11-19 07:29:39,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:39,726 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 205 transitions. [2022-11-19 07:29:39,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 07:29:39,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:39,727 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:39,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:29:39,728 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-19 07:29:39,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:39,728 INFO L85 PathProgramCache]: Analyzing trace with hash -772928796, now seen corresponding path program 1 times [2022-11-19 07:29:39,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:39,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606090544] [2022-11-19 07:29:39,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:39,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:39,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:39,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:39,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:39,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606090544] [2022-11-19 07:29:39,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606090544] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:39,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:39,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:29:39,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021579449] [2022-11-19 07:29:39,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:39,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:29:39,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:39,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:29:39,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:29:39,789 INFO L87 Difference]: Start difference. First operand 149 states and 205 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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 07:29:39,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:39,853 INFO L93 Difference]: Finished difference Result 161 states and 211 transitions. [2022-11-19 07:29:39,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:29:39,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-19 07:29:39,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:39,857 INFO L225 Difference]: With dead ends: 161 [2022-11-19 07:29:39,857 INFO L226 Difference]: Without dead ends: 161 [2022-11-19 07:29:39,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:29:39,858 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 12 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:39,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 137 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:29:39,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-19 07:29:39,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 149. [2022-11-19 07:29:39,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 113 states have (on average 1.7876106194690264) internal successors, (202), 148 states have internal predecessors, (202), 0 states have call successors, (0), 0 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 07:29:39,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 202 transitions. [2022-11-19 07:29:39,868 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 202 transitions. Word has length 13 [2022-11-19 07:29:39,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:39,868 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 202 transitions. [2022-11-19 07:29:39,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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 07:29:39,869 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 202 transitions. [2022-11-19 07:29:39,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 07:29:39,870 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:39,870 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:39,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:29:39,871 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-19 07:29:39,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:39,873 INFO L85 PathProgramCache]: Analyzing trace with hash -25836561, now seen corresponding path program 1 times [2022-11-19 07:29:39,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:39,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026532754] [2022-11-19 07:29:39,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:39,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:39,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:40,017 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 07:29:40,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:40,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026532754] [2022-11-19 07:29:40,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026532754] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:40,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:40,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:29:40,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223614969] [2022-11-19 07:29:40,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:40,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:29:40,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:40,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:29:40,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:29:40,020 INFO L87 Difference]: Start difference. First operand 149 states and 202 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 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 07:29:40,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:40,178 INFO L93 Difference]: Finished difference Result 148 states and 200 transitions. [2022-11-19 07:29:40,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:29:40,179 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-19 07:29:40,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:40,180 INFO L225 Difference]: With dead ends: 148 [2022-11-19 07:29:40,180 INFO L226 Difference]: Without dead ends: 148 [2022-11-19 07:29:40,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:29:40,183 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 5 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:40,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 190 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:29:40,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-19 07:29:40,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-11-19 07:29:40,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 113 states have (on average 1.7699115044247788) internal successors, (200), 147 states have internal predecessors, (200), 0 states have call successors, (0), 0 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 07:29:40,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 200 transitions. [2022-11-19 07:29:40,190 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 200 transitions. Word has length 13 [2022-11-19 07:29:40,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:40,190 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 200 transitions. [2022-11-19 07:29:40,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 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 07:29:40,191 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 200 transitions. [2022-11-19 07:29:40,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 07:29:40,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:40,192 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:40,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 07:29:40,192 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-19 07:29:40,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:40,193 INFO L85 PathProgramCache]: Analyzing trace with hash -25836560, now seen corresponding path program 1 times [2022-11-19 07:29:40,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:40,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381260995] [2022-11-19 07:29:40,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:40,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:40,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:40,473 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 07:29:40,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:40,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381260995] [2022-11-19 07:29:40,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381260995] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:40,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:40,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:29:40,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421587382] [2022-11-19 07:29:40,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:40,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:29:40,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:40,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:29:40,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:29:40,476 INFO L87 Difference]: Start difference. First operand 148 states and 200 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 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 07:29:40,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:40,645 INFO L93 Difference]: Finished difference Result 147 states and 198 transitions. [2022-11-19 07:29:40,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:29:40,646 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-19 07:29:40,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:40,647 INFO L225 Difference]: With dead ends: 147 [2022-11-19 07:29:40,647 INFO L226 Difference]: Without dead ends: 147 [2022-11-19 07:29:40,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:29:40,648 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 3 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:40,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 167 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:29:40,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-19 07:29:40,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-11-19 07:29:40,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 113 states have (on average 1.752212389380531) internal successors, (198), 146 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 07:29:40,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 198 transitions. [2022-11-19 07:29:40,652 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 198 transitions. Word has length 13 [2022-11-19 07:29:40,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:40,652 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 198 transitions. [2022-11-19 07:29:40,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 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 07:29:40,652 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 198 transitions. [2022-11-19 07:29:40,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 07:29:40,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:40,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:40,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 07:29:40,653 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-19 07:29:40,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:40,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1689027667, now seen corresponding path program 1 times [2022-11-19 07:29:40,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:40,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255481367] [2022-11-19 07:29:40,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:40,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:40,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:40,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:40,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:40,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255481367] [2022-11-19 07:29:40,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255481367] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:40,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:40,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:29:40,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571638844] [2022-11-19 07:29:40,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:40,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:29:40,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:40,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:29:40,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:29:40,826 INFO L87 Difference]: Start difference. First operand 147 states and 198 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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 07:29:41,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:41,037 INFO L93 Difference]: Finished difference Result 215 states and 275 transitions. [2022-11-19 07:29:41,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:29:41,037 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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 14 [2022-11-19 07:29:41,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:41,038 INFO L225 Difference]: With dead ends: 215 [2022-11-19 07:29:41,038 INFO L226 Difference]: Without dead ends: 215 [2022-11-19 07:29:41,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:29:41,039 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 91 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:41,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 219 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:29:41,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-11-19 07:29:41,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 176. [2022-11-19 07:29:41,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 142 states have (on average 1.7535211267605635) internal successors, (249), 175 states have internal predecessors, (249), 0 states have call successors, (0), 0 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 07:29:41,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 249 transitions. [2022-11-19 07:29:41,045 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 249 transitions. Word has length 14 [2022-11-19 07:29:41,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:41,045 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 249 transitions. [2022-11-19 07:29:41,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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 07:29:41,046 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 249 transitions. [2022-11-19 07:29:41,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 07:29:41,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:41,046 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:41,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 07:29:41,047 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-19 07:29:41,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:41,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1809028201, now seen corresponding path program 1 times [2022-11-19 07:29:41,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:41,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159229878] [2022-11-19 07:29:41,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:41,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:41,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:41,091 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 07:29:41,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:41,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159229878] [2022-11-19 07:29:41,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159229878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:41,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:41,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:29:41,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783790516] [2022-11-19 07:29:41,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:41,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:29:41,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:41,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:29:41,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:29:41,094 INFO L87 Difference]: Start difference. First operand 176 states and 249 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 07:29:41,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:41,242 INFO L93 Difference]: Finished difference Result 205 states and 261 transitions. [2022-11-19 07:29:41,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:29:41,243 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 14 [2022-11-19 07:29:41,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:41,244 INFO L225 Difference]: With dead ends: 205 [2022-11-19 07:29:41,244 INFO L226 Difference]: Without dead ends: 205 [2022-11-19 07:29:41,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:29:41,245 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 165 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:41,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 129 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:29:41,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-11-19 07:29:41,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 177. [2022-11-19 07:29:41,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 143 states have (on average 1.7482517482517483) internal successors, (250), 176 states have internal predecessors, (250), 0 states have call successors, (0), 0 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 07:29:41,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 250 transitions. [2022-11-19 07:29:41,251 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 250 transitions. Word has length 14 [2022-11-19 07:29:41,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:41,251 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 250 transitions. [2022-11-19 07:29:41,251 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 07:29:41,252 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 250 transitions. [2022-11-19 07:29:41,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 07:29:41,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:41,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:41,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 07:29:41,253 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-19 07:29:41,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:41,254 INFO L85 PathProgramCache]: Analyzing trace with hash 245949691, now seen corresponding path program 1 times [2022-11-19 07:29:41,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:41,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181777912] [2022-11-19 07:29:41,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:41,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:41,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:41,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:41,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181777912] [2022-11-19 07:29:41,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181777912] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:41,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:41,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:29:41,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126575974] [2022-11-19 07:29:41,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:41,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:29:41,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:41,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:29:41,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:29:41,353 INFO L87 Difference]: Start difference. First operand 177 states and 250 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 07:29:41,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:41,492 INFO L93 Difference]: Finished difference Result 190 states and 266 transitions. [2022-11-19 07:29:41,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:29:41,492 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 15 [2022-11-19 07:29:41,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:41,493 INFO L225 Difference]: With dead ends: 190 [2022-11-19 07:29:41,493 INFO L226 Difference]: Without dead ends: 190 [2022-11-19 07:29:41,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:29:41,494 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 52 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:41,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 133 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:29:41,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-11-19 07:29:41,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 184. [2022-11-19 07:29:41,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 150 states have (on average 1.7266666666666666) internal successors, (259), 183 states have internal predecessors, (259), 0 states have call successors, (0), 0 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 07:29:41,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 259 transitions. [2022-11-19 07:29:41,500 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 259 transitions. Word has length 15 [2022-11-19 07:29:41,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:41,500 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 259 transitions. [2022-11-19 07:29:41,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 07:29:41,500 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 259 transitions. [2022-11-19 07:29:41,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 07:29:41,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:41,501 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:41,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 07:29:41,502 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-19 07:29:41,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:41,502 INFO L85 PathProgramCache]: Analyzing trace with hash 245955643, now seen corresponding path program 1 times [2022-11-19 07:29:41,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:41,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581195217] [2022-11-19 07:29:41,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:41,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:41,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:41,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:41,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581195217] [2022-11-19 07:29:41,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581195217] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:41,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:41,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:29:41,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039079035] [2022-11-19 07:29:41,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:41,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:29:41,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:41,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:29:41,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:29:41,654 INFO L87 Difference]: Start difference. First operand 184 states and 259 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 07:29:41,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:41,854 INFO L93 Difference]: Finished difference Result 184 states and 240 transitions. [2022-11-19 07:29:41,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:29:41,855 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 15 [2022-11-19 07:29:41,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:41,856 INFO L225 Difference]: With dead ends: 184 [2022-11-19 07:29:41,856 INFO L226 Difference]: Without dead ends: 184 [2022-11-19 07:29:41,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:29:41,857 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 44 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:41,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 220 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:29:41,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-19 07:29:41,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 160. [2022-11-19 07:29:41,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.6904761904761905) internal successors, (213), 159 states have internal predecessors, (213), 0 states have call successors, (0), 0 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 07:29:41,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 213 transitions. [2022-11-19 07:29:41,862 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 213 transitions. Word has length 15 [2022-11-19 07:29:41,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:41,863 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 213 transitions. [2022-11-19 07:29:41,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 07:29:41,863 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 213 transitions. [2022-11-19 07:29:41,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 07:29:41,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:41,864 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:41,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-19 07:29:41,864 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-19 07:29:41,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:41,865 INFO L85 PathProgramCache]: Analyzing trace with hash 941013543, now seen corresponding path program 1 times [2022-11-19 07:29:41,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:41,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484220724] [2022-11-19 07:29:41,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:41,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:41,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:42,170 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 07:29:42,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:42,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484220724] [2022-11-19 07:29:42,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484220724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:42,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:42,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 07:29:42,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094274923] [2022-11-19 07:29:42,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:42,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:29:42,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:42,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:29:42,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:29:42,173 INFO L87 Difference]: Start difference. First operand 160 states and 213 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 9 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 07:29:42,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:42,619 INFO L93 Difference]: Finished difference Result 206 states and 268 transitions. [2022-11-19 07:29:42,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:29:42,620 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 9 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 15 [2022-11-19 07:29:42,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:42,621 INFO L225 Difference]: With dead ends: 206 [2022-11-19 07:29:42,621 INFO L226 Difference]: Without dead ends: 206 [2022-11-19 07:29:42,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:29:42,622 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 158 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:42,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 224 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:29:42,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-19 07:29:42,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 159. [2022-11-19 07:29:42,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 126 states have (on average 1.6746031746031746) internal successors, (211), 158 states have internal predecessors, (211), 0 states have call successors, (0), 0 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 07:29:42,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 211 transitions. [2022-11-19 07:29:42,627 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 211 transitions. Word has length 15 [2022-11-19 07:29:42,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:42,627 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 211 transitions. [2022-11-19 07:29:42,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 9 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 07:29:42,628 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 211 transitions. [2022-11-19 07:29:42,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 07:29:42,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:42,628 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:42,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-19 07:29:42,629 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-19 07:29:42,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:42,629 INFO L85 PathProgramCache]: Analyzing trace with hash 941013544, now seen corresponding path program 1 times [2022-11-19 07:29:42,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:42,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609686297] [2022-11-19 07:29:42,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:42,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:42,968 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 07:29:42,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:42,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609686297] [2022-11-19 07:29:42,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609686297] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:42,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:42,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 07:29:42,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675865510] [2022-11-19 07:29:42,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:42,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:29:42,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:42,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:29:42,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:29:42,973 INFO L87 Difference]: Start difference. First operand 159 states and 211 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 9 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 07:29:43,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:43,498 INFO L93 Difference]: Finished difference Result 205 states and 266 transitions. [2022-11-19 07:29:43,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:29:43,499 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 9 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 15 [2022-11-19 07:29:43,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:43,500 INFO L225 Difference]: With dead ends: 205 [2022-11-19 07:29:43,500 INFO L226 Difference]: Without dead ends: 205 [2022-11-19 07:29:43,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:29:43,501 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 154 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:43,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 187 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:29:43,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-11-19 07:29:43,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 158. [2022-11-19 07:29:43,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 126 states have (on average 1.6587301587301588) internal successors, (209), 157 states have internal predecessors, (209), 0 states have call successors, (0), 0 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 07:29:43,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 209 transitions. [2022-11-19 07:29:43,505 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 209 transitions. Word has length 15 [2022-11-19 07:29:43,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:43,506 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 209 transitions. [2022-11-19 07:29:43,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 9 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 07:29:43,506 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 209 transitions. [2022-11-19 07:29:43,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 07:29:43,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:43,508 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:43,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-19 07:29:43,509 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-19 07:29:43,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:43,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1532005382, now seen corresponding path program 1 times [2022-11-19 07:29:43,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:43,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987390571] [2022-11-19 07:29:43,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:43,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:43,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:43,622 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 07:29:43,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:43,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987390571] [2022-11-19 07:29:43,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987390571] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:43,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:43,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:29:43,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894574728] [2022-11-19 07:29:43,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:43,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:29:43,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:43,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:29:43,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:29:43,625 INFO L87 Difference]: Start difference. First operand 158 states and 209 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 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 07:29:43,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:43,781 INFO L93 Difference]: Finished difference Result 157 states and 207 transitions. [2022-11-19 07:29:43,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:29:43,782 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 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 15 [2022-11-19 07:29:43,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:43,783 INFO L225 Difference]: With dead ends: 157 [2022-11-19 07:29:43,783 INFO L226 Difference]: Without dead ends: 157 [2022-11-19 07:29:43,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:29:43,784 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 5 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:43,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 180 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:29:43,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-11-19 07:29:43,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-11-19 07:29:43,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 126 states have (on average 1.6428571428571428) internal successors, (207), 156 states have internal predecessors, (207), 0 states have call successors, (0), 0 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 07:29:43,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 207 transitions. [2022-11-19 07:29:43,787 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 207 transitions. Word has length 15 [2022-11-19 07:29:43,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:43,788 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 207 transitions. [2022-11-19 07:29:43,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 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 07:29:43,788 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 207 transitions. [2022-11-19 07:29:43,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 07:29:43,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:43,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:43,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-19 07:29:43,789 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-19 07:29:43,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:43,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1532005383, now seen corresponding path program 1 times [2022-11-19 07:29:43,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:43,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867943842] [2022-11-19 07:29:43,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:43,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:43,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:43,979 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 07:29:43,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:43,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867943842] [2022-11-19 07:29:43,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867943842] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:43,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:43,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:29:43,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062317551] [2022-11-19 07:29:43,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:43,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:29:43,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:43,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:29:43,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:29:43,982 INFO L87 Difference]: Start difference. First operand 157 states and 207 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 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 07:29:44,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:44,153 INFO L93 Difference]: Finished difference Result 156 states and 205 transitions. [2022-11-19 07:29:44,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:29:44,153 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 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 15 [2022-11-19 07:29:44,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:44,154 INFO L225 Difference]: With dead ends: 156 [2022-11-19 07:29:44,154 INFO L226 Difference]: Without dead ends: 156 [2022-11-19 07:29:44,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:29:44,155 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 3 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:44,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 157 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:29:44,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-11-19 07:29:44,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2022-11-19 07:29:44,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 126 states have (on average 1.626984126984127) internal successors, (205), 155 states have internal predecessors, (205), 0 states have call successors, (0), 0 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 07:29:44,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 205 transitions. [2022-11-19 07:29:44,159 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 205 transitions. Word has length 15 [2022-11-19 07:29:44,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:44,159 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 205 transitions. [2022-11-19 07:29:44,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 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 07:29:44,160 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 205 transitions. [2022-11-19 07:29:44,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 07:29:44,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:44,160 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:44,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-19 07:29:44,161 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-19 07:29:44,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:44,161 INFO L85 PathProgramCache]: Analyzing trace with hash -490255891, now seen corresponding path program 1 times [2022-11-19 07:29:44,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:44,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207844936] [2022-11-19 07:29:44,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:44,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:44,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:44,241 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 07:29:44,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:44,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207844936] [2022-11-19 07:29:44,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207844936] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:44,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040819286] [2022-11-19 07:29:44,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:44,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:44,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:44,246 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:44,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:29:44,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:44,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:29:44,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:44,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:29:44,536 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 07:29:44,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:44,586 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 07:29:44,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040819286] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:29:44,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [111193840] [2022-11-19 07:29:44,608 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-19 07:29:44,608 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:29:44,612 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:29:44,618 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:29:44,619 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:29:44,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:44,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:44,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:29:44,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:29:44,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:29:44,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:44,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 07:29:44,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:44,751 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 34 treesize of output 21 [2022-11-19 07:29:44,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:44,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 07:29:44,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:44,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 07:29:45,507 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:29:47,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [111193840] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:47,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:29:47,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [3, 3, 3] total 15 [2022-11-19 07:29:47,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230509496] [2022-11-19 07:29:47,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:47,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 07:29:47,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:47,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 07:29:47,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:29:47,622 INFO L87 Difference]: Start difference. First operand 156 states and 205 transitions. Second operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 07:29:48,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:48,716 INFO L93 Difference]: Finished difference Result 169 states and 218 transitions. [2022-11-19 07:29:48,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 07:29:48,717 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-19 07:29:48,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:48,718 INFO L225 Difference]: With dead ends: 169 [2022-11-19 07:29:48,718 INFO L226 Difference]: Without dead ends: 150 [2022-11-19 07:29:48,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:29:48,719 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 40 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:48,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 144 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:29:48,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-19 07:29:48,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2022-11-19 07:29:48,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 120 states have (on average 1.65) internal successors, (198), 149 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 07:29:48,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 198 transitions. [2022-11-19 07:29:48,723 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 198 transitions. Word has length 17 [2022-11-19 07:29:48,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:48,723 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 198 transitions. [2022-11-19 07:29:48,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 07:29:48,723 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 198 transitions. [2022-11-19 07:29:48,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 07:29:48,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:48,724 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:48,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:48,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:48,925 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-19 07:29:48,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:48,925 INFO L85 PathProgramCache]: Analyzing trace with hash -916505773, now seen corresponding path program 1 times [2022-11-19 07:29:48,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:48,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193482964] [2022-11-19 07:29:48,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:48,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:49,134 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 07:29:49,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:49,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193482964] [2022-11-19 07:29:49,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193482964] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:49,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:49,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 07:29:49,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206620558] [2022-11-19 07:29:49,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:49,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:29:49,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:49,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:29:49,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:29:49,136 INFO L87 Difference]: Start difference. First operand 150 states and 198 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 07:29:49,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:49,498 INFO L93 Difference]: Finished difference Result 195 states and 252 transitions. [2022-11-19 07:29:49,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 07:29:49,498 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-19 07:29:49,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:49,499 INFO L225 Difference]: With dead ends: 195 [2022-11-19 07:29:49,500 INFO L226 Difference]: Without dead ends: 195 [2022-11-19 07:29:49,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:29:49,501 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 172 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:49,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 139 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:29:49,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-11-19 07:29:49,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 149. [2022-11-19 07:29:49,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 120 states have (on average 1.6416666666666666) internal successors, (197), 148 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:49,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 197 transitions. [2022-11-19 07:29:49,511 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 197 transitions. Word has length 17 [2022-11-19 07:29:49,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:49,512 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 197 transitions. [2022-11-19 07:29:49,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 07:29:49,512 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 197 transitions. [2022-11-19 07:29:49,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 07:29:49,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:49,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:49,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-19 07:29:49,514 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-19 07:29:49,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:49,514 INFO L85 PathProgramCache]: Analyzing trace with hash -916505772, now seen corresponding path program 1 times [2022-11-19 07:29:49,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:49,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892439196] [2022-11-19 07:29:49,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:49,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:49,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:49,823 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 07:29:49,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:49,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892439196] [2022-11-19 07:29:49,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892439196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:49,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:49,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 07:29:49,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773669636] [2022-11-19 07:29:49,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:49,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:29:49,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:49,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:29:49,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:29:49,826 INFO L87 Difference]: Start difference. First operand 149 states and 197 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 07:29:50,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:50,207 INFO L93 Difference]: Finished difference Result 194 states and 251 transitions. [2022-11-19 07:29:50,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:29:50,207 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-19 07:29:50,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:50,208 INFO L225 Difference]: With dead ends: 194 [2022-11-19 07:29:50,208 INFO L226 Difference]: Without dead ends: 194 [2022-11-19 07:29:50,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:29:50,209 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 165 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:50,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 127 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:29:50,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-11-19 07:29:50,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 148. [2022-11-19 07:29:50,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 120 states have (on average 1.6333333333333333) internal successors, (196), 147 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:50,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 196 transitions. [2022-11-19 07:29:50,213 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 196 transitions. Word has length 17 [2022-11-19 07:29:50,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:50,213 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 196 transitions. [2022-11-19 07:29:50,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 07:29:50,214 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 196 transitions. [2022-11-19 07:29:50,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 07:29:50,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:50,214 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:50,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-19 07:29:50,216 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-19 07:29:50,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:50,216 INFO L85 PathProgramCache]: Analyzing trace with hash -109306794, now seen corresponding path program 1 times [2022-11-19 07:29:50,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:50,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093777116] [2022-11-19 07:29:50,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:50,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:51,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:51,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:51,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093777116] [2022-11-19 07:29:51,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093777116] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:51,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98216227] [2022-11-19 07:29:51,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:51,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:51,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:51,239 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:51,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:29:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:51,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-19 07:29:51,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:51,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:29:51,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:29:51,579 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:29:51,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-19 07:29:51,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:51,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 07:29:51,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:51,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 07:29:51,794 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:29:51,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 37 [2022-11-19 07:29:51,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-19 07:29:51,928 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:29:51,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-11-19 07:29:51,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-19 07:29:52,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:52,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 37 [2022-11-19 07:29:52,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:52,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:52,249 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:29:52,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 24 [2022-11-19 07:29:52,269 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:52,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:52,757 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_454 (Array Int Int)) (|v_ULTIMATE.start_main_~n~0#1.offset_95| Int) (v_ArrVal_453 (Array Int Int)) (v_ArrVal_456 (Array Int Int))) (or (not (<= 0 |v_ULTIMATE.start_main_~n~0#1.offset_95|)) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem15#1.base| v_ArrVal_453) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem15#1.base| v_ArrVal_454) |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|) v_ArrVal_456) |c_ULTIMATE.start_main_~root~0#1.base|) (+ |v_ULTIMATE.start_main_~n~0#1.offset_95| 4)) 0) (not (<= |v_ULTIMATE.start_main_~n~0#1.offset_95| |c_ULTIMATE.start_main_~root~0#1.offset|)))) (forall ((v_ArrVal_454 (Array Int Int)) (|v_ULTIMATE.start_main_~n~0#1.offset_95| Int) (v_ArrVal_455 (Array Int Int))) (or (not (<= 0 |v_ULTIMATE.start_main_~n~0#1.offset_95|)) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem15#1.base| v_ArrVal_454))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|) v_ArrVal_455)) |c_ULTIMATE.start_main_~root~0#1.base|) (+ |v_ULTIMATE.start_main_~n~0#1.offset_95| 4)) 0) (not (<= |v_ULTIMATE.start_main_~n~0#1.offset_95| |c_ULTIMATE.start_main_~root~0#1.offset|))))) is different from false [2022-11-19 07:29:52,791 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|))) (and (forall ((v_ArrVal_454 (Array Int Int)) (|v_ULTIMATE.start_main_~n~0#1.offset_95| Int) (v_ArrVal_453 (Array Int Int)) (v_ArrVal_456 (Array Int Int))) (or (not (<= 0 |v_ULTIMATE.start_main_~n~0#1.offset_95|)) (not (<= |v_ULTIMATE.start_main_~n~0#1.offset_95| |c_ULTIMATE.start_main_~root~0#1.offset|)) (= (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_453) (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_454) |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|) v_ArrVal_456) |c_ULTIMATE.start_main_~root~0#1.base|) (+ |v_ULTIMATE.start_main_~n~0#1.offset_95| 4)) 0))) (forall ((v_ArrVal_454 (Array Int Int)) (|v_ULTIMATE.start_main_~n~0#1.offset_95| Int) (v_ArrVal_455 (Array Int Int))) (or (not (<= 0 |v_ULTIMATE.start_main_~n~0#1.offset_95|)) (= (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_454))) (store .cse1 (select (select .cse1 |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|) v_ArrVal_455)) |c_ULTIMATE.start_main_~root~0#1.base|) (+ |v_ULTIMATE.start_main_~n~0#1.offset_95| 4)) 0) (not (<= |v_ULTIMATE.start_main_~n~0#1.offset_95| |c_ULTIMATE.start_main_~root~0#1.offset|)))))) is different from false [2022-11-19 07:29:53,267 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:29:53,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 132 [2022-11-19 07:29:59,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:59,624 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:29:59,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 41 [2022-11-19 07:29:59,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:59,654 INFO L321 Elim1Store]: treesize reduction 5, result has 73.7 percent of original size [2022-11-19 07:29:59,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 125 treesize of output 98 [2022-11-19 07:29:59,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-19 07:29:59,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:59,700 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-11-19 07:29:59,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 1 [2022-11-19 07:29:59,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:59,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98216227] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:29:59,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1610410086] [2022-11-19 07:29:59,712 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-19 07:29:59,712 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:29:59,713 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:29:59,713 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:29:59,713 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:29:59,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:59,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:59,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:29:59,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:29:59,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:29:59,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:59,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 07:29:59,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:59,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 07:29:59,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:59,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 07:29:59,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:59,813 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 34 treesize of output 21 [2022-11-19 07:30:00,015 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:30:00,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 07:30:00,041 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:30:00,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 07:30:00,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 07:30:00,060 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 07:30:00,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 07:30:00,096 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-19 07:30:00,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 92 [2022-11-19 07:30:00,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 74 [2022-11-19 07:30:00,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2022-11-19 07:30:00,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:00,144 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 07:30:00,144 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 168 treesize of output 117 [2022-11-19 07:30:00,163 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-19 07:30:00,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 96 [2022-11-19 07:30:00,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 1 [2022-11-19 07:30:00,414 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:30:00,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 07:30:00,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 07:30:00,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 07:30:00,445 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 07:30:00,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 07:30:00,486 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-19 07:30:00,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 92 [2022-11-19 07:30:00,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 74 [2022-11-19 07:30:00,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 1 [2022-11-19 07:30:00,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:00,538 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 07:30:00,538 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 168 treesize of output 117 [2022-11-19 07:30:00,560 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-19 07:30:00,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 96 [2022-11-19 07:30:00,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 1 [2022-11-19 07:30:01,120 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:30:01,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 07:30:01,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 07:30:01,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 07:30:01,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 07:30:01,164 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 07:30:01,169 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:30:03,884 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7282#(and (or (and (<= |ULTIMATE.start_main_~n~0#1.offset| 0) (= |ULTIMATE.start_main_~root~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0)) (and (exists ((|v_ULTIMATE.start_main_~n~0#1.base_122| Int) (|v_ULTIMATE.start_main_~n~0#1.offset_105| Int)) (and (<= 0 |v_ULTIMATE.start_main_~n~0#1.offset_105|) (= 1 (select |#valid| |v_ULTIMATE.start_main_~n~0#1.base_122|)) (= |ULTIMATE.start_main_~n~0#1.offset| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~n~0#1.base_122|) (+ |v_ULTIMATE.start_main_~n~0#1.offset_105| 4))) (<= (+ |v_ULTIMATE.start_main_~n~0#1.offset_105| 8) (select |#length| |v_ULTIMATE.start_main_~n~0#1.base_122|)) (= |ULTIMATE.start_main_~n~0#1.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~n~0#1.base_122|) (+ |v_ULTIMATE.start_main_~n~0#1.offset_105| 4))))) (= |ULTIMATE.start_main_~root~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) (not (= (select |#valid| |ULTIMATE.start_main_~n~0#1.base|) 1)))' at error location [2022-11-19 07:30:03,884 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:30:03,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:30:03,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 36 [2022-11-19 07:30:03,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147478872] [2022-11-19 07:30:03,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:30:03,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-19 07:30:03,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:30:03,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-19 07:30:03,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=2292, Unknown=16, NotChecked=202, Total=2862 [2022-11-19 07:30:03,888 INFO L87 Difference]: Start difference. First operand 148 states and 196 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 07:30:04,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:30:04,855 INFO L93 Difference]: Finished difference Result 172 states and 224 transitions. [2022-11-19 07:30:04,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-19 07:30:04,858 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 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 26 [2022-11-19 07:30:04,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:30:04,859 INFO L225 Difference]: With dead ends: 172 [2022-11-19 07:30:04,859 INFO L226 Difference]: Without dead ends: 172 [2022-11-19 07:30:04,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=537, Invalid=2995, Unknown=16, NotChecked=234, Total=3782 [2022-11-19 07:30:04,861 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 77 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 471 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:30:04,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 761 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 260 Invalid, 0 Unknown, 471 Unchecked, 0.3s Time] [2022-11-19 07:30:04,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-19 07:30:04,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 163. [2022-11-19 07:30:04,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 135 states have (on average 1.5925925925925926) internal successors, (215), 162 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:30:04,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 215 transitions. [2022-11-19 07:30:04,865 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 215 transitions. Word has length 26 [2022-11-19 07:30:04,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:30:04,866 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 215 transitions. [2022-11-19 07:30:04,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 07:30:04,866 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 215 transitions. [2022-11-19 07:30:04,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 07:30:04,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:30:04,866 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:30:04,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:30:05,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-19 07:30:05,067 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-19 07:30:05,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:30:05,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1001326369, now seen corresponding path program 1 times [2022-11-19 07:30:05,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:30:05,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107448397] [2022-11-19 07:30:05,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:05,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:30:05,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:05,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:05,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:30:05,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107448397] [2022-11-19 07:30:05,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107448397] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:30:05,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628773122] [2022-11-19 07:30:05,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:05,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:30:05,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:30:05,651 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:30:05,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:30:05,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:05,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-19 07:30:05,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:30:06,057 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:30:06,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-19 07:30:06,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:06,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 07:30:06,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:06,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 07:30:06,246 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:30:06,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2022-11-19 07:30:06,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2022-11-19 07:30:06,331 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:30:06,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2022-11-19 07:30:06,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2022-11-19 07:30:06,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:06,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:30:06,481 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_532 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem22#1.base| v_ArrVal_532) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) 0)) (forall ((v_ArrVal_531 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem22#1.base| v_ArrVal_531) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) 0))) is different from false [2022-11-19 07:30:06,492 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) (+ |c_ULTIMATE.start_main_~n~0#1.offset| 4)))) (and (forall ((v_ArrVal_531 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_531) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) 0)) (forall ((v_ArrVal_532 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_532) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) 0)))) is different from false [2022-11-19 07:30:06,506 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~n~0#1.offset| 4))) (and (forall ((v_ArrVal_529 (Array Int Int)) (v_ArrVal_530 (Array Int Int)) (v_ArrVal_532 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem21#1.base| v_ArrVal_529) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem21#1.base| v_ArrVal_530) |c_ULTIMATE.start_main_~n~0#1.base|) .cse0) v_ArrVal_532) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) 0)) (forall ((v_ArrVal_531 (Array Int Int)) (v_ArrVal_530 (Array Int Int))) (= (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem21#1.base| v_ArrVal_530))) (store .cse1 (select (select .cse1 |c_ULTIMATE.start_main_~n~0#1.base|) .cse0) v_ArrVal_531)) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) 0)))) is different from false [2022-11-19 07:30:06,622 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~n~0#1.offset| 4))) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) .cse0 |c_ULTIMATE.start_main_#t~malloc20#1.base|)))) (and (forall ((v_ArrVal_529 (Array Int Int)) (v_ArrVal_530 (Array Int Int)) (v_ArrVal_532 (Array Int Int))) (= (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~n~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~n~0#1.base|) .cse0 |c_ULTIMATE.start_main_#t~malloc20#1.offset|)) |c_ULTIMATE.start_main_#t~malloc20#1.base| v_ArrVal_529) (select (select (store .cse1 |c_ULTIMATE.start_main_#t~malloc20#1.base| v_ArrVal_530) |c_ULTIMATE.start_main_~n~0#1.base|) .cse0) v_ArrVal_532) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) 0)) (forall ((v_ArrVal_531 (Array Int Int)) (v_ArrVal_530 (Array Int Int))) (= (select (select (let ((.cse2 (store .cse1 |c_ULTIMATE.start_main_#t~malloc20#1.base| v_ArrVal_530))) (store .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~n~0#1.base|) .cse0) v_ArrVal_531)) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) 0))))) is different from false [2022-11-19 07:30:06,966 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:30:06,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 108 treesize of output 112 [2022-11-19 07:30:06,990 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:30:06,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 98 treesize of output 109 [2022-11-19 07:30:06,999 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 0 case distinctions, treesize of input 139 treesize of output 118 [2022-11-19 07:30:07,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 96 [2022-11-19 07:30:07,045 INFO L321 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2022-11-19 07:30:07,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 243 treesize of output 241 [2022-11-19 07:30:07,064 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 212 treesize of output 208 [2022-11-19 07:30:07,073 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 208 treesize of output 198 [2022-11-19 07:30:07,081 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 198 treesize of output 174 [2022-11-19 07:30:07,111 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-11-19 07:30:07,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 352 treesize of output 267 [2022-11-19 07:30:07,131 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:30:07,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 249 treesize of output 242 [2022-11-19 07:30:07,141 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 231 treesize of output 227 [2022-11-19 07:30:07,168 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:30:07,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 234 treesize of output 252 [2022-11-19 07:30:07,382 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:07,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628773122] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:30:07,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [907005803] [2022-11-19 07:30:07,385 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-19 07:30:07,385 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:30:07,386 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:30:07,386 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:30:07,386 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:30:07,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:07,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:07,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:30:07,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:30:07,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:30:07,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:07,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 07:30:07,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:07,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 07:30:07,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:07,475 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 34 treesize of output 21 [2022-11-19 07:30:07,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:07,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 07:30:07,698 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:30:07,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 07:30:07,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 07:30:07,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 07:30:07,720 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 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-19 07:30:07,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-19 07:30:07,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:07,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 104 [2022-11-19 07:30:07,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 88 [2022-11-19 07:30:07,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 1 [2022-11-19 07:30:07,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:07,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:07,794 INFO L321 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2022-11-19 07:30:07,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 220 treesize of output 141 [2022-11-19 07:30:07,813 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-19 07:30:07,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 128 [2022-11-19 07:30:07,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 1 [2022-11-19 07:30:08,031 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:30:08,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 07:30:08,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 07:30:08,048 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 19 treesize of output 1 [2022-11-19 07:30:08,052 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 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-19 07:30:08,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-19 07:30:08,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:08,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 104 [2022-11-19 07:30:08,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 88 [2022-11-19 07:30:08,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 1 [2022-11-19 07:30:08,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:08,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:08,140 INFO L321 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2022-11-19 07:30:08,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 220 treesize of output 141 [2022-11-19 07:30:08,161 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-19 07:30:08,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 128 [2022-11-19 07:30:08,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 1 [2022-11-19 07:30:08,715 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:30:08,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 07:30:08,741 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:30:08,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 07:30:08,757 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 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-19 07:30:08,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 07:30:08,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-19 07:30:08,780 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:30:10,980 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7832#(and (or (and (<= |ULTIMATE.start_main_~n~0#1.offset| 0) (= |ULTIMATE.start_main_~root~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0)) (and (= |ULTIMATE.start_main_~root~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~n~0#1.base_134| Int) (|v_ULTIMATE.start_main_~n~0#1.offset_117| Int)) (and (= 1 (select |#valid| |v_ULTIMATE.start_main_~n~0#1.base_134|)) (<= 0 |v_ULTIMATE.start_main_~n~0#1.offset_117|) (= |ULTIMATE.start_main_~n~0#1.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~n~0#1.base_134|) (+ |v_ULTIMATE.start_main_~n~0#1.offset_117| 4))) (<= (+ |v_ULTIMATE.start_main_~n~0#1.offset_117| 8) (select |#length| |v_ULTIMATE.start_main_~n~0#1.base_134|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~n~0#1.base_134|) (+ |v_ULTIMATE.start_main_~n~0#1.offset_117| 4)) |ULTIMATE.start_main_~n~0#1.offset|))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) (not (= (select |#valid| |ULTIMATE.start_main_~n~0#1.base|) 1)))' at error location [2022-11-19 07:30:10,980 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:30:10,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:30:10,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 13] total 29 [2022-11-19 07:30:10,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555277451] [2022-11-19 07:30:10,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:30:10,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-19 07:30:10,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:30:10,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-19 07:30:10,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1509, Unknown=12, NotChecked=332, Total=2070 [2022-11-19 07:30:10,982 INFO L87 Difference]: Start difference. First operand 163 states and 215 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 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 07:30:14,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:30:14,145 INFO L93 Difference]: Finished difference Result 511 states and 628 transitions. [2022-11-19 07:30:14,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-19 07:30:14,146 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 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) Word has length 26 [2022-11-19 07:30:14,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:30:14,148 INFO L225 Difference]: With dead ends: 511 [2022-11-19 07:30:14,148 INFO L226 Difference]: Without dead ends: 511 [2022-11-19 07:30:14,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=560, Invalid=3463, Unknown=25, NotChecked=508, Total=4556 [2022-11-19 07:30:14,150 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 559 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 2865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1467 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:30:14,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 1013 Invalid, 2865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1345 Invalid, 0 Unknown, 1467 Unchecked, 1.3s Time] [2022-11-19 07:30:14,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-11-19 07:30:14,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 239. [2022-11-19 07:30:14,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 211 states have (on average 1.5308056872037914) internal successors, (323), 238 states have internal predecessors, (323), 0 states have call successors, (0), 0 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 07:30:14,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 323 transitions. [2022-11-19 07:30:14,159 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 323 transitions. Word has length 26 [2022-11-19 07:30:14,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:30:14,160 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 323 transitions. [2022-11-19 07:30:14,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 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 07:30:14,161 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 323 transitions. [2022-11-19 07:30:14,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 07:30:14,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:30:14,162 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:30:14,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:30:14,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:30:14,368 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-19 07:30:14,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:30:14,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1831783504, now seen corresponding path program 1 times [2022-11-19 07:30:14,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:30:14,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233099134] [2022-11-19 07:30:14,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:14,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:30:14,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:14,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:14,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:30:14,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233099134] [2022-11-19 07:30:14,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233099134] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:30:14,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721869810] [2022-11-19 07:30:14,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:14,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:30:14,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:30:14,812 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:30:14,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:30:14,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:14,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-19 07:30:14,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:30:15,089 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:30:15,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 07:30:15,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:30:15,240 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:30:15,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-11-19 07:30:15,312 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:30:15,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-11-19 07:30:15,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-19 07:30:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:15,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:30:15,547 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_605 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem16#1.base| v_ArrVal_605) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|)) 1)) is different from false [2022-11-19 07:30:15,605 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_605 (Array Int Int)) (v_ArrVal_604 (Array Int Int))) (= (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem15#1.base| v_ArrVal_604))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|) v_ArrVal_605)) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|)) 1)) is different from false [2022-11-19 07:30:15,615 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_605 (Array Int Int)) (v_ArrVal_604 (Array Int Int))) (= (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|) v_ArrVal_604))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|) v_ArrVal_605)) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|)) 1)) is different from false [2022-11-19 07:30:15,623 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:30:15,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-11-19 07:30:15,634 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:30:15,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 131 [2022-11-19 07:30:15,647 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:30:15,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 114 [2022-11-19 07:30:15,654 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 106 treesize of output 102 [2022-11-19 07:30:18,605 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:30:18,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 124 [2022-11-19 07:30:18,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:18,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721869810] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:30:18,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [954145537] [2022-11-19 07:30:18,957 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-19 07:30:18,957 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:30:18,957 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:30:18,958 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:30:18,958 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:30:18,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:18,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:18,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:30:18,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:30:18,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:19,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 07:30:19,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:30:19,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:19,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 07:30:19,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:19,033 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 34 treesize of output 21 [2022-11-19 07:30:19,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:19,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 07:30:19,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:19,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:19,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:19,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:19,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:19,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 40 [2022-11-19 07:30:19,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-19 07:30:19,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:19,225 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-19 07:30:19,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:19,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 07:30:19,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:19,284 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:30:19,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 164 treesize of output 117 [2022-11-19 07:30:19,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:19,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 86 [2022-11-19 07:30:19,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:19,319 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 50 treesize of output 21 [2022-11-19 07:30:19,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:19,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:19,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:19,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:19,376 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-19 07:30:19,377 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 202 treesize of output 150 [2022-11-19 07:30:19,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:19,405 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-19 07:30:19,405 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 5 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 122 [2022-11-19 07:30:19,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:19,418 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 42 treesize of output 21 [2022-11-19 07:30:19,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:19,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:19,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:19,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:19,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:19,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 40 [2022-11-19 07:30:19,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:19,647 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-19 07:30:19,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-19 07:30:19,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:19,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 07:30:19,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:19,715 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:30:19,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 164 treesize of output 117 [2022-11-19 07:30:19,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:19,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 86 [2022-11-19 07:30:19,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:19,743 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 50 treesize of output 21 [2022-11-19 07:30:19,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:19,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:19,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:19,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:19,805 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-19 07:30:19,805 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 202 treesize of output 150 [2022-11-19 07:30:19,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:19,833 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-19 07:30:19,834 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 5 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 122 [2022-11-19 07:30:19,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:19,851 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 42 treesize of output 21 [2022-11-19 07:30:20,553 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:30:26,770 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8842#(and (= |ULTIMATE.start_main_~root~0#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_main_~n~0#1.base|) 1)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~pred~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~pred~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-19 07:30:26,771 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:30:26,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:30:26,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 28 [2022-11-19 07:30:26,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910726850] [2022-11-19 07:30:26,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:30:26,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-19 07:30:26,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:30:26,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-19 07:30:26,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1912, Unknown=8, NotChecked=288, Total=2652 [2022-11-19 07:30:26,774 INFO L87 Difference]: Start difference. First operand 239 states and 323 transitions. Second operand has 29 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:30:27,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:30:27,863 INFO L93 Difference]: Finished difference Result 447 states and 589 transitions. [2022-11-19 07:30:27,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 07:30:27,864 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-19 07:30:27,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:30:27,865 INFO L225 Difference]: With dead ends: 447 [2022-11-19 07:30:27,865 INFO L226 Difference]: Without dead ends: 447 [2022-11-19 07:30:27,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1343 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=710, Invalid=2834, Unknown=8, NotChecked=354, Total=3906 [2022-11-19 07:30:27,867 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 578 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1105 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:30:27,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [578 Valid, 373 Invalid, 1933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 778 Invalid, 0 Unknown, 1105 Unchecked, 0.7s Time] [2022-11-19 07:30:27,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-11-19 07:30:27,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 314. [2022-11-19 07:30:27,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 286 states have (on average 1.5524475524475525) internal successors, (444), 313 states have internal predecessors, (444), 0 states have call successors, (0), 0 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 07:30:27,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 444 transitions. [2022-11-19 07:30:27,876 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 444 transitions. Word has length 28 [2022-11-19 07:30:27,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:30:27,877 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 444 transitions. [2022-11-19 07:30:27,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:30:27,877 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 444 transitions. [2022-11-19 07:30:27,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 07:30:27,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:30:27,878 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:30:27,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:30:28,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:30:28,084 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-19 07:30:28,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:30:28,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1831783503, now seen corresponding path program 1 times [2022-11-19 07:30:28,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:30:28,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390914622] [2022-11-19 07:30:28,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:28,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:30:28,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:28,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:28,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:30:28,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390914622] [2022-11-19 07:30:28,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390914622] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:30:28,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812883753] [2022-11-19 07:30:28,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:28,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:30:28,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:30:28,726 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:30:28,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:30:28,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:28,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-19 07:30:28,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:30:28,994 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:30:28,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-19 07:30:29,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:30:29,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:30:29,134 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:30:29,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-19 07:30:29,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-19 07:30:29,208 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:30:29,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2022-11-19 07:30:29,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2022-11-19 07:30:29,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-19 07:30:29,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-11-19 07:30:29,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:29,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:30:29,554 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:30:29,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 45 [2022-11-19 07:30:29,589 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_681 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem16#1.base| v_ArrVal_681) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|))) (forall ((v_prenex_8 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem16#1.base| v_prenex_8) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) (+ 5 |c_ULTIMATE.start_main_#t~mem16#1.offset|))) (forall ((v_ArrVal_680 (Array Int Int))) (= |c_ULTIMATE.start_main_#t~mem16#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem16#1.base| v_ArrVal_680) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|)))) is different from false [2022-11-19 07:30:29,622 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|))) (and (forall ((v_ArrVal_681 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_681) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|))) (forall ((v_ArrVal_680 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_680) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) .cse0)) (forall ((v_prenex_8 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_prenex_8) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) (+ 5 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|)))))) is different from false [2022-11-19 07:30:29,646 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_678 (Array Int Int)) (v_prenex_8 (Array Int Int)) (v_ArrVal_679 (Array Int Int))) (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem15#1.base| v_ArrVal_679))) (< (select (select (store .cse0 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem15#1.base| v_ArrVal_678) |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|) v_prenex_8) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) (+ (select (select .cse0 |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|) 5)))) (forall ((v_ArrVal_678 (Array Int Int)) (v_ArrVal_679 (Array Int Int)) (v_ArrVal_681 (Array Int Int))) (<= 0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem15#1.base| v_ArrVal_679) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem15#1.base| v_ArrVal_678) |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|) v_ArrVal_681) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|))) (forall ((v_ArrVal_678 (Array Int Int)) (v_ArrVal_680 (Array Int Int))) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem15#1.base| v_ArrVal_678))) (let ((.cse2 (select (select .cse1 |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|))) (= (select (select (store .cse1 .cse2 v_ArrVal_680) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) .cse2))))) is different from false [2022-11-19 07:30:29,665 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|))) (and (forall ((v_ArrVal_678 (Array Int Int)) (v_prenex_8 (Array Int Int)) (v_ArrVal_679 (Array Int Int))) (let ((.cse0 (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_679))) (< (select (select (store .cse0 (select (select (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_678) |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|) v_prenex_8) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) (+ 5 (select (select .cse0 |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|))))) (forall ((v_ArrVal_678 (Array Int Int)) (v_ArrVal_680 (Array Int Int))) (let ((.cse2 (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_678))) (let ((.cse3 (select (select .cse2 |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|))) (= (select (select (store .cse2 .cse3 v_ArrVal_680) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) .cse3)))) (forall ((v_ArrVal_678 (Array Int Int)) (v_ArrVal_679 (Array Int Int)) (v_ArrVal_681 (Array Int Int))) (<= 0 (select (select (store (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_679) (select (select (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_678) |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|) v_ArrVal_681) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|))))) is different from false [2022-11-19 07:30:29,677 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:30:29,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2022-11-19 07:30:29,684 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:30:29,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-11-19 07:30:29,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2022-11-19 07:30:29,700 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:30:29,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 161 [2022-11-19 07:30:29,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 136 [2022-11-19 07:30:29,715 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 114 treesize of output 110 [2022-11-19 07:30:29,722 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 110 treesize of output 98 [2022-11-19 07:30:29,817 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 07:30:29,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 1 [2022-11-19 07:30:29,824 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 07:30:29,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 1 [2022-11-19 07:30:29,997 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:30:29,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 46 [2022-11-19 07:30:30,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:30,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812883753] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:30:30,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1698791789] [2022-11-19 07:30:30,049 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-19 07:30:30,049 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:30:30,050 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:30:30,050 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:30:30,050 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:30:30,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:30,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:30,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:30:30,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:30:30,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:30,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 07:30:30,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:30:30,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:30,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 07:30:30,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:30,126 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 34 treesize of output 21 [2022-11-19 07:30:30,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:30,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 07:30:30,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:30,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:30,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:30,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:30,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:30,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 40 [2022-11-19 07:30:30,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-19 07:30:30,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:30,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 07:30:30,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:30,280 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-19 07:30:30,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:30,321 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:30:30,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 164 treesize of output 117 [2022-11-19 07:30:30,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:30,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 86 [2022-11-19 07:30:30,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:30,346 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 42 treesize of output 21 [2022-11-19 07:30:30,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:30,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:30,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:30,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:30,397 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-19 07:30:30,397 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 194 treesize of output 142 [2022-11-19 07:30:30,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:30,425 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-19 07:30:30,426 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 4 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 108 [2022-11-19 07:30:30,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:30,442 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 54 treesize of output 21 [2022-11-19 07:30:30,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:30,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:30,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:30,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:30,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:30,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 40 [2022-11-19 07:30:30,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:30,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-19 07:30:30,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:30,680 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-19 07:30:30,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:30,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 07:30:30,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:30,738 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:30:30,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 164 treesize of output 117 [2022-11-19 07:30:30,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:30,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 86 [2022-11-19 07:30:30,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:30,765 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 42 treesize of output 21 [2022-11-19 07:30:30,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:30,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:30,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:30,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:30,822 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-19 07:30:30,822 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 194 treesize of output 142 [2022-11-19 07:30:30,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:30,849 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-19 07:30:30,849 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 4 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 108 [2022-11-19 07:30:30,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:30,863 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 54 treesize of output 21 [2022-11-19 07:30:31,584 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:30:38,057 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9848#(and (= |ULTIMATE.start_main_~root~0#1.offset| 0) (or (not (<= (+ |ULTIMATE.start_main_~n~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~n~0#1.base|))) (not (<= 0 |ULTIMATE.start_main_~n~0#1.offset|))) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~pred~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~pred~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-19 07:30:38,057 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:30:38,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:30:38,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 30 [2022-11-19 07:30:38,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685429517] [2022-11-19 07:30:38,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:30:38,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-19 07:30:38,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:30:38,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-19 07:30:38,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=2034, Unknown=4, NotChecked=396, Total=2862 [2022-11-19 07:30:38,060 INFO L87 Difference]: Start difference. First operand 314 states and 444 transitions. Second operand has 31 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 31 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:30:42,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:30:42,008 INFO L93 Difference]: Finished difference Result 932 states and 1177 transitions. [2022-11-19 07:30:42,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-19 07:30:42,008 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 31 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-19 07:30:42,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:30:42,011 INFO L225 Difference]: With dead ends: 932 [2022-11-19 07:30:42,012 INFO L226 Difference]: Without dead ends: 932 [2022-11-19 07:30:42,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 65 SyntacticMatches, 8 SemanticMatches, 89 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 2868 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=1410, Invalid=6082, Unknown=6, NotChecked=692, Total=8190 [2022-11-19 07:30:42,014 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 1300 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 1708 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1300 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 3135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1267 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:30:42,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1300 Valid, 769 Invalid, 3135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1708 Invalid, 0 Unknown, 1267 Unchecked, 1.6s Time] [2022-11-19 07:30:42,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2022-11-19 07:30:42,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 334. [2022-11-19 07:30:42,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 312 states have (on average 1.4967948717948718) internal successors, (467), 333 states have internal predecessors, (467), 0 states have call successors, (0), 0 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 07:30:42,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 467 transitions. [2022-11-19 07:30:42,026 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 467 transitions. Word has length 28 [2022-11-19 07:30:42,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:30:42,027 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 467 transitions. [2022-11-19 07:30:42,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 31 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:30:42,027 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 467 transitions. [2022-11-19 07:30:42,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 07:30:42,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:30:42,028 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:30:42,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:30:42,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-19 07:30:42,239 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-19 07:30:42,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:30:42,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1831777552, now seen corresponding path program 1 times [2022-11-19 07:30:42,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:30:42,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402663238] [2022-11-19 07:30:42,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:42,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:30:42,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:42,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:30:42,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:30:42,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402663238] [2022-11-19 07:30:42,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402663238] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:30:42,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:30:42,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:30:42,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272322937] [2022-11-19 07:30:42,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:30:42,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:30:42,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:30:42,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:30:42,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:30:42,369 INFO L87 Difference]: Start difference. First operand 334 states and 467 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:30:42,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:30:42,494 INFO L93 Difference]: Finished difference Result 334 states and 463 transitions. [2022-11-19 07:30:42,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:30:42,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-19 07:30:42,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:30:42,496 INFO L225 Difference]: With dead ends: 334 [2022-11-19 07:30:42,496 INFO L226 Difference]: Without dead ends: 334 [2022-11-19 07:30:42,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:30:42,497 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 8 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:30:42,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 129 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:30:42,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-11-19 07:30:42,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 331. [2022-11-19 07:30:42,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 309 states have (on average 1.4886731391585761) internal successors, (460), 330 states have internal predecessors, (460), 0 states have call successors, (0), 0 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 07:30:42,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 460 transitions. [2022-11-19 07:30:42,504 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 460 transitions. Word has length 28 [2022-11-19 07:30:42,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:30:42,504 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 460 transitions. [2022-11-19 07:30:42,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:30:42,505 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 460 transitions. [2022-11-19 07:30:42,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 07:30:42,505 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:30:42,505 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:30:42,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-19 07:30:42,506 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-19 07:30:42,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:30:42,506 INFO L85 PathProgramCache]: Analyzing trace with hash -69135879, now seen corresponding path program 1 times [2022-11-19 07:30:42,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:30:42,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51247396] [2022-11-19 07:30:42,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:42,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:30:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:43,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:30:43,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51247396] [2022-11-19 07:30:43,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51247396] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:30:43,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295927443] [2022-11-19 07:30:43,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:43,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:30:43,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:30:43,057 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:30:43,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:30:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:43,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-19 07:30:43,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:30:43,452 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:30:43,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 07:30:43,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:43,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 07:30:43,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:43,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 07:30:43,661 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:30:43,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 50 [2022-11-19 07:30:43,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-19 07:30:43,753 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:30:43,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 50 [2022-11-19 07:30:43,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-19 07:30:43,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-19 07:30:43,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:43,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:30:43,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295927443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:30:43,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:30:43,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11] total 22 [2022-11-19 07:30:43,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402057279] [2022-11-19 07:30:43,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:30:43,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 07:30:43,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:30:43,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 07:30:43,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2022-11-19 07:30:43,951 INFO L87 Difference]: Start difference. First operand 331 states and 460 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:30:44,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:30:44,825 INFO L93 Difference]: Finished difference Result 437 states and 579 transitions. [2022-11-19 07:30:44,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 07:30:44,825 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-19 07:30:44,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:30:44,827 INFO L225 Difference]: With dead ends: 437 [2022-11-19 07:30:44,827 INFO L226 Difference]: Without dead ends: 437 [2022-11-19 07:30:44,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2022-11-19 07:30:44,828 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 238 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:30:44,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 283 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:30:44,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-11-19 07:30:44,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 252. [2022-11-19 07:30:44,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 230 states have (on average 1.4782608695652173) internal successors, (340), 251 states have internal predecessors, (340), 0 states have call successors, (0), 0 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 07:30:44,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 340 transitions. [2022-11-19 07:30:44,834 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 340 transitions. Word has length 28 [2022-11-19 07:30:44,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:30:44,835 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 340 transitions. [2022-11-19 07:30:44,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:30:44,835 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 340 transitions. [2022-11-19 07:30:44,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 07:30:44,835 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:30:44,836 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:30:44,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:30:45,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-19 07:30:45,042 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-19 07:30:45,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:30:45,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1525008258, now seen corresponding path program 1 times [2022-11-19 07:30:45,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:30:45,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949324798] [2022-11-19 07:30:45,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:45,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:30:45,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:45,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:45,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:30:45,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949324798] [2022-11-19 07:30:45,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949324798] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:30:45,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425232585] [2022-11-19 07:30:45,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:45,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:30:45,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:30:45,427 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:30:45,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:30:45,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:45,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-19 07:30:45,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:30:45,597 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:30:45,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 07:30:45,777 INFO L321 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-11-19 07:30:45,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 33 [2022-11-19 07:30:45,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:30:45,958 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:30:45,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-11-19 07:30:46,055 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:30:46,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2022-11-19 07:30:46,068 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:30:46,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2022-11-19 07:30:46,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:46,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:30:46,403 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:30:46,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 43 [2022-11-19 07:30:46,414 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:30:46,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 273 treesize of output 244 [2022-11-19 07:30:46,429 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:30:46,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 229 treesize of output 219 [2022-11-19 07:30:46,436 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 188 treesize of output 180 [2022-11-19 07:30:47,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:47,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425232585] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:30:47,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:30:47,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [12, 11] total 30 [2022-11-19 07:30:47,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446828118] [2022-11-19 07:30:47,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:30:47,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 07:30:47,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:30:47,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 07:30:47,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=713, Unknown=4, NotChecked=0, Total=870 [2022-11-19 07:30:47,005 INFO L87 Difference]: Start difference. First operand 252 states and 340 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:30:47,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:30:47,304 INFO L93 Difference]: Finished difference Result 330 states and 437 transitions. [2022-11-19 07:30:47,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 07:30:47,305 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-19 07:30:47,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:30:47,306 INFO L225 Difference]: With dead ends: 330 [2022-11-19 07:30:47,306 INFO L226 Difference]: Without dead ends: 328 [2022-11-19 07:30:47,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=197, Invalid=921, Unknown=4, NotChecked=0, Total=1122 [2022-11-19 07:30:47,307 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 58 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 450 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:30:47,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 369 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 198 Invalid, 0 Unknown, 450 Unchecked, 0.2s Time] [2022-11-19 07:30:47,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-11-19 07:30:47,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 276. [2022-11-19 07:30:47,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 254 states have (on average 1.452755905511811) internal successors, (369), 275 states have internal predecessors, (369), 0 states have call successors, (0), 0 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 07:30:47,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 369 transitions. [2022-11-19 07:30:47,313 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 369 transitions. Word has length 29 [2022-11-19 07:30:47,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:30:47,313 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 369 transitions. [2022-11-19 07:30:47,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:30:47,314 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 369 transitions. [2022-11-19 07:30:47,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 07:30:47,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:30:47,314 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:30:47,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-19 07:30:47,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:30:47,520 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-19 07:30:47,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:30:47,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1577460565, now seen corresponding path program 1 times [2022-11-19 07:30:47,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:30:47,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803576704] [2022-11-19 07:30:47,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:47,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:30:47,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:48,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:48,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:30:48,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803576704] [2022-11-19 07:30:48,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803576704] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:30:48,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103198248] [2022-11-19 07:30:48,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:48,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:30:48,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:30:48,503 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:30:48,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:30:48,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:48,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-19 07:30:48,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:30:48,820 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:30:48,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 07:30:48,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:30:49,015 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:30:49,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-11-19 07:30:49,111 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:30:49,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-11-19 07:30:49,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:49,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-11-19 07:30:49,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:49,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:30:51,791 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:30:51,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 37 [2022-11-19 07:30:51,812 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:30:51,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 170 treesize of output 145 [2022-11-19 07:30:51,829 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:30:51,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 118 [2022-11-19 07:30:51,836 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 110 treesize of output 102 [2022-11-19 07:30:55,104 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:30:55,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 94 treesize of output 248 [2022-11-19 07:30:58,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:58,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103198248] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:30:58,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1259485299] [2022-11-19 07:30:58,205 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-19 07:30:58,205 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:30:58,205 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:30:58,206 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:30:58,206 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:30:58,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:30:58,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:30:58,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:30:58,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 07:30:58,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,269 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 34 treesize of output 21 [2022-11-19 07:30:58,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 07:30:58,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 07:30:58,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 40 [2022-11-19 07:30:58,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-19 07:30:58,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:58,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 23 [2022-11-19 07:30:58,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:58,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 23 [2022-11-19 07:30:58,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:58,529 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:30:58,529 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 200 treesize of output 127 [2022-11-19 07:30:58,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,543 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 98 [2022-11-19 07:30:58,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,555 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 60 treesize of output 21 [2022-11-19 07:30:58,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:58,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:58,612 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-19 07:30:58,612 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 246 treesize of output 164 [2022-11-19 07:30:58,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,640 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-19 07:30:58,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 138 [2022-11-19 07:30:58,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,652 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 48 treesize of output 21 [2022-11-19 07:30:58,813 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:30:58,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:58,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:58,863 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-19 07:30:58,863 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 246 treesize of output 164 [2022-11-19 07:30:58,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,893 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-19 07:30:58,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 138 [2022-11-19 07:30:58,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,906 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 48 treesize of output 21 [2022-11-19 07:30:59,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:59,697 INFO L321 Elim1Store]: treesize reduction 54, result has 44.9 percent of original size [2022-11-19 07:30:59,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 164 treesize of output 201 [2022-11-19 07:30:59,951 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:30:59,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 07:30:59,978 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:30:59,996 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:31:00,043 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-11-19 07:31:00,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 1 [2022-11-19 07:31:00,091 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:31:00,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 07:31:00,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:00,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:00,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:00,223 INFO L321 Elim1Store]: treesize reduction 22, result has 50.0 percent of original size [2022-11-19 07:31:00,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 599 treesize of output 582 [2022-11-19 07:31:00,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:00,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:00,272 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-11-19 07:31:00,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 701 treesize of output 672 [2022-11-19 07:31:00,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:00,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:00,298 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 698 treesize of output 669 [2022-11-19 07:31:00,463 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:31:06,538 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13736#(and (= |ULTIMATE.start_main_~root~0#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_main_~n~0#1.base|) 1)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~pred~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~pred~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-19 07:31:06,539 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:31:06,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:31:06,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 12] total 36 [2022-11-19 07:31:06,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539308047] [2022-11-19 07:31:06,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:31:06,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-19 07:31:06,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:31:06,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-19 07:31:06,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=3045, Unknown=37, NotChecked=0, Total=3540 [2022-11-19 07:31:06,541 INFO L87 Difference]: Start difference. First operand 276 states and 369 transitions. Second operand has 38 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:31:08,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:31:08,276 INFO L93 Difference]: Finished difference Result 446 states and 576 transitions. [2022-11-19 07:31:08,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-19 07:31:08,276 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-19 07:31:08,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:31:08,278 INFO L225 Difference]: With dead ends: 446 [2022-11-19 07:31:08,278 INFO L226 Difference]: Without dead ends: 446 [2022-11-19 07:31:08,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2036 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=779, Invalid=4584, Unknown=39, NotChecked=0, Total=5402 [2022-11-19 07:31:08,281 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 324 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 1480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 685 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:31:08,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 594 Invalid, 1480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 723 Invalid, 0 Unknown, 685 Unchecked, 0.6s Time] [2022-11-19 07:31:08,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-11-19 07:31:08,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 369. [2022-11-19 07:31:08,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 347 states have (on average 1.4092219020172911) internal successors, (489), 368 states have internal predecessors, (489), 0 states have call successors, (0), 0 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 07:31:08,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 489 transitions. [2022-11-19 07:31:08,288 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 489 transitions. Word has length 29 [2022-11-19 07:31:08,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:31:08,289 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 489 transitions. [2022-11-19 07:31:08,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:31:08,289 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 489 transitions. [2022-11-19 07:31:08,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 07:31:08,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:31:08,290 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:31:08,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-19 07:31:08,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-19 07:31:08,496 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-19 07:31:08,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:31:08,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1577460566, now seen corresponding path program 1 times [2022-11-19 07:31:08,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:31:08,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658433294] [2022-11-19 07:31:08,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:08,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:31:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:09,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:31:09,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:31:09,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658433294] [2022-11-19 07:31:09,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658433294] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:31:09,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460555221] [2022-11-19 07:31:09,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:09,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:31:09,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:31:09,384 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:31:09,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:31:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:09,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-19 07:31:09,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:31:09,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:31:09,683 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:31:09,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-19 07:31:09,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:31:09,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:31:09,871 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:31:09,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-11-19 07:31:09,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-19 07:31:09,967 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:31:09,967 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-11-19 07:31:09,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-19 07:31:10,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:10,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2022-11-19 07:31:10,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:10,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-19 07:31:10,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:31:10,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:31:10,369 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~root~0#1.offset| 4))) (and (forall ((v_ArrVal_1016 (Array Int Int)) (v_ArrVal_1015 (Array Int Int))) (<= (+ 4 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem22#1.base| v_ArrVal_1016) |c_ULTIMATE.start_main_~root~0#1.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem22#1.base| v_ArrVal_1015) |c_ULTIMATE.start_main_~root~0#1.base|) .cse0)))) (forall ((v_ArrVal_1016 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem22#1.base| v_ArrVal_1016) |c_ULTIMATE.start_main_~root~0#1.base|) .cse0))))) is different from false [2022-11-19 07:31:10,379 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) (+ |c_ULTIMATE.start_main_~n~0#1.offset| 4))) (.cse1 (+ |c_ULTIMATE.start_main_~root~0#1.offset| 4))) (and (forall ((v_ArrVal_1016 (Array Int Int)) (v_ArrVal_1015 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1016) |c_ULTIMATE.start_main_~root~0#1.base|) .cse1) 4) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1015) |c_ULTIMATE.start_main_~root~0#1.base|) .cse1)))) (forall ((v_ArrVal_1016 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1016) |c_ULTIMATE.start_main_~root~0#1.base|) .cse1))))) is different from false [2022-11-19 07:31:10,392 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (+ |c_ULTIMATE.start_main_~n~0#1.offset| 4)) (.cse1 (+ |c_ULTIMATE.start_main_~root~0#1.offset| 4))) (and (forall ((v_ArrVal_1016 (Array Int Int)) (v_ArrVal_1015 (Array Int Int)) (v_ArrVal_1014 (Array Int Int)) (v_ArrVal_1013 (Array Int Int))) (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem21#1.base| v_ArrVal_1014))) (let ((.cse0 (select (select .cse2 |c_ULTIMATE.start_main_~n~0#1.base|) .cse3))) (<= (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem21#1.base| v_ArrVal_1013) .cse0 v_ArrVal_1016) |c_ULTIMATE.start_main_~root~0#1.base|) .cse1) 4) (select |c_#length| (select (select (store .cse2 .cse0 v_ArrVal_1015) |c_ULTIMATE.start_main_~root~0#1.base|) .cse1)))))) (forall ((v_ArrVal_1016 (Array Int Int)) (v_ArrVal_1014 (Array Int Int)) (v_ArrVal_1013 (Array Int Int))) (<= 0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem21#1.base| v_ArrVal_1013) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem21#1.base| v_ArrVal_1014) |c_ULTIMATE.start_main_~n~0#1.base|) .cse3) v_ArrVal_1016) |c_ULTIMATE.start_main_~root~0#1.base|) .cse1))))) is different from false [2022-11-19 07:31:10,406 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse4 (+ |c_ULTIMATE.start_main_~n~0#1.offset| 4))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) .cse4)) (.cse2 (+ |c_ULTIMATE.start_main_~root~0#1.offset| 4))) (and (forall ((v_ArrVal_1016 (Array Int Int)) (v_ArrVal_1015 (Array Int Int)) (v_ArrVal_1014 (Array Int Int)) (v_ArrVal_1013 (Array Int Int))) (let ((.cse3 (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1014))) (let ((.cse1 (select (select .cse3 |c_ULTIMATE.start_main_~n~0#1.base|) .cse4))) (<= (+ (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1013) .cse1 v_ArrVal_1016) |c_ULTIMATE.start_main_~root~0#1.base|) .cse2) 4) (select |c_#length| (select (select (store .cse3 .cse1 v_ArrVal_1015) |c_ULTIMATE.start_main_~root~0#1.base|) .cse2)))))) (forall ((v_ArrVal_1016 (Array Int Int)) (v_ArrVal_1014 (Array Int Int)) (v_ArrVal_1013 (Array Int Int))) (<= 0 (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1013) (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1014) |c_ULTIMATE.start_main_~n~0#1.base|) .cse4) v_ArrVal_1016) |c_ULTIMATE.start_main_~root~0#1.base|) .cse2)))))) is different from false [2022-11-19 07:31:10,415 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:31:10,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 90 [2022-11-19 07:31:10,423 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:31:10,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 60 [2022-11-19 07:31:10,435 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:31:10,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 400 treesize of output 345 [2022-11-19 07:31:10,464 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:31:10,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1148 treesize of output 1081 [2022-11-19 07:31:10,483 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 1066 treesize of output 986 [2022-11-19 07:31:10,495 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 986 treesize of output 954 [2022-11-19 07:31:10,507 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 954 treesize of output 874 [2022-11-19 07:31:10,550 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:31:10,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 874 treesize of output 730 [2022-11-19 07:31:12,927 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:31:12,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 45 [2022-11-19 07:31:12,934 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:31:12,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-11-19 07:31:12,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:12,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-11-19 07:31:12,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:12,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:12,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2022-11-19 07:31:13,131 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:31:13,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 74 [2022-11-19 07:31:13,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:31:13,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460555221] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:31:13,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1459851855] [2022-11-19 07:31:13,252 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-19 07:31:13,252 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:31:13,252 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:31:13,252 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:31:13,253 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:31:13,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:13,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:13,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:31:13,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:13,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 07:31:13,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:31:13,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:31:13,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:13,319 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 34 treesize of output 21 [2022-11-19 07:31:13,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:13,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 07:31:13,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:13,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 07:31:13,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:13,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:13,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:13,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:13,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:13,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 40 [2022-11-19 07:31:13,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:13,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-19 07:31:13,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:13,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:13,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 23 [2022-11-19 07:31:13,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:13,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:13,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 23 [2022-11-19 07:31:13,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:13,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:13,560 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:31:13,561 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 200 treesize of output 127 [2022-11-19 07:31:13,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:13,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:13,578 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 98 [2022-11-19 07:31:13,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:13,589 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 48 treesize of output 21 [2022-11-19 07:31:13,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:13,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:13,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:13,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:13,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:13,632 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-19 07:31:13,632 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 234 treesize of output 152 [2022-11-19 07:31:13,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:13,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:13,657 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-19 07:31:13,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 150 treesize of output 122 [2022-11-19 07:31:13,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:13,670 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 64 treesize of output 21 [2022-11-19 07:31:13,818 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:31:13,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:13,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:13,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:13,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:13,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:13,877 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-19 07:31:13,877 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 234 treesize of output 152 [2022-11-19 07:31:13,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:13,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:13,904 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-19 07:31:13,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 150 treesize of output 122 [2022-11-19 07:31:13,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:13,915 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 48 treesize of output 21 [2022-11-19 07:31:14,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:14,644 INFO L321 Elim1Store]: treesize reduction 54, result has 44.9 percent of original size [2022-11-19 07:31:14,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 164 treesize of output 201 [2022-11-19 07:31:14,923 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:31:14,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 07:31:14,950 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-11-19 07:31:14,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 1 [2022-11-19 07:31:14,981 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-11-19 07:31:14,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 1 [2022-11-19 07:31:15,035 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-11-19 07:31:15,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 1 [2022-11-19 07:31:15,058 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-11-19 07:31:15,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 1 [2022-11-19 07:31:15,101 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:31:15,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 07:31:15,145 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:31:15,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 07:31:15,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:15,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:15,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:15,315 INFO L321 Elim1Store]: treesize reduction 22, result has 50.0 percent of original size [2022-11-19 07:31:15,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 633 treesize of output 616 [2022-11-19 07:31:15,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:15,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:15,361 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-11-19 07:31:15,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 759 treesize of output 730 [2022-11-19 07:31:15,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:15,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:15,388 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 756 treesize of output 727 [2022-11-19 07:31:15,626 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:31:21,183 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14810#(and (= |ULTIMATE.start_main_~root~0#1.offset| 0) (or (not (<= (+ |ULTIMATE.start_main_~n~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~n~0#1.base|))) (not (<= 0 |ULTIMATE.start_main_~n~0#1.offset|))) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~pred~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~pred~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-19 07:31:21,183 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:31:21,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:31:21,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 11] total 33 [2022-11-19 07:31:21,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496744107] [2022-11-19 07:31:21,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:31:21,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-19 07:31:21,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:31:21,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-19 07:31:21,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=2286, Unknown=4, NotChecked=412, Total=3080 [2022-11-19 07:31:21,186 INFO L87 Difference]: Start difference. First operand 369 states and 489 transitions. Second operand has 34 states, 33 states have (on average 2.606060606060606) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 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 07:31:36,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:31:36,834 INFO L93 Difference]: Finished difference Result 1350 states and 1681 transitions. [2022-11-19 07:31:36,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-19 07:31:36,835 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.606060606060606) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-19 07:31:36,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:31:36,839 INFO L225 Difference]: With dead ends: 1350 [2022-11-19 07:31:36,840 INFO L226 Difference]: Without dead ends: 1350 [2022-11-19 07:31:36,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 49 SyntacticMatches, 7 SemanticMatches, 128 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 6455 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=2380, Invalid=13381, Unknown=5, NotChecked=1004, Total=16770 [2022-11-19 07:31:36,845 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 1603 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 2447 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1603 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 5535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 2447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2891 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:31:36,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1603 Valid, 1099 Invalid, 5535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 2447 Invalid, 0 Unknown, 2891 Unchecked, 2.7s Time] [2022-11-19 07:31:36,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2022-11-19 07:31:36,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 666. [2022-11-19 07:31:36,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 644 states have (on average 1.4270186335403727) internal successors, (919), 665 states have internal predecessors, (919), 0 states have call successors, (0), 0 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 07:31:36,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 919 transitions. [2022-11-19 07:31:36,880 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 919 transitions. Word has length 29 [2022-11-19 07:31:36,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:31:36,880 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 919 transitions. [2022-11-19 07:31:36,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.606060606060606) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 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 07:31:36,881 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 919 transitions. [2022-11-19 07:31:36,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-19 07:31:36,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:31:36,881 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:31:36,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:31:37,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:31:37,087 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-19 07:31:37,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:31:37,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1029369265, now seen corresponding path program 1 times [2022-11-19 07:31:37,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:31:37,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098799658] [2022-11-19 07:31:37,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:37,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:31:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:37,620 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:31:37,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:31:37,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098799658] [2022-11-19 07:31:37,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098799658] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:31:37,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268139395] [2022-11-19 07:31:37,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:37,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:31:37,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:31:37,622 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:31:37,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:31:37,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:37,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-19 07:31:37,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:31:38,071 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:31:38,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 07:31:38,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:31:38,312 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:31:38,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-11-19 07:31:38,415 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:31:38,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-11-19 07:31:38,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:38,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-11-19 07:31:38,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:31:38,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:31:43,414 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:31:43,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 37 [2022-11-19 07:31:43,434 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:31:43,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 170 treesize of output 145 [2022-11-19 07:31:43,455 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:31:43,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 118 [2022-11-19 07:31:43,463 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 110 treesize of output 102 [2022-11-19 07:31:48,044 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:31:48,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 94 treesize of output 248 [2022-11-19 07:31:57,204 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:31:57,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268139395] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:31:57,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1726569244] [2022-11-19 07:31:57,206 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-19 07:31:57,206 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:31:57,207 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:31:57,207 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:31:57,207 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:31:57,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:57,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:57,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:31:57,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:31:57,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:57,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 07:31:57,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:31:57,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:57,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 07:31:57,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:57,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 07:31:57,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:57,316 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 34 treesize of output 21 [2022-11-19 07:31:57,482 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:31:57,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 07:31:57,522 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:31:57,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 07:31:57,534 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 07:31:57,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 07:31:57,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 07:31:57,594 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-19 07:31:57,595 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 92 [2022-11-19 07:31:57,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 74 [2022-11-19 07:31:57,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 1 [2022-11-19 07:31:57,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:57,689 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-19 07:31:57,690 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 176 treesize of output 125 [2022-11-19 07:31:57,723 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-19 07:31:57,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 110 [2022-11-19 07:31:57,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 1 [2022-11-19 07:31:57,854 INFO L321 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2022-11-19 07:31:57,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2022-11-19 07:31:57,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 37 [2022-11-19 07:31:57,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:57,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:57,933 INFO L321 Elim1Store]: treesize reduction 89, result has 12.7 percent of original size [2022-11-19 07:31:57,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 136 treesize of output 102 [2022-11-19 07:31:57,951 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 07:31:57,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 83 [2022-11-19 07:31:57,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 07:31:57,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:57,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:58,065 INFO L321 Elim1Store]: treesize reduction 106, result has 15.2 percent of original size [2022-11-19 07:31:58,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 293 treesize of output 193 [2022-11-19 07:31:58,085 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 07:31:58,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 193 treesize of output 158 [2022-11-19 07:31:58,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 1 [2022-11-19 07:31:58,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:58,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:58,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:58,223 INFO L321 Elim1Store]: treesize reduction 176, result has 14.6 percent of original size [2022-11-19 07:31:58,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 339 treesize of output 230 [2022-11-19 07:31:58,261 INFO L321 Elim1Store]: treesize reduction 31, result has 29.5 percent of original size [2022-11-19 07:31:58,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 2 case distinctions, treesize of input 239 treesize of output 198 [2022-11-19 07:31:58,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 1 [2022-11-19 07:31:58,485 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:31:58,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 07:31:58,527 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:31:58,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 07:31:58,538 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 07:31:58,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 07:31:58,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 07:31:58,587 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-19 07:31:58,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 92 [2022-11-19 07:31:58,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 74 [2022-11-19 07:31:58,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2022-11-19 07:31:58,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:58,644 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 07:31:58,644 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 168 treesize of output 117 [2022-11-19 07:31:58,684 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-19 07:31:58,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 96 [2022-11-19 07:31:58,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2022-11-19 07:31:58,797 INFO L321 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2022-11-19 07:31:58,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2022-11-19 07:31:58,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-11-19 07:31:58,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 07:31:58,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:58,866 INFO L321 Elim1Store]: treesize reduction 61, result has 10.3 percent of original size [2022-11-19 07:31:58,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 82 [2022-11-19 07:31:58,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 51 [2022-11-19 07:31:58,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:58,953 INFO L321 Elim1Store]: treesize reduction 88, result has 14.6 percent of original size [2022-11-19 07:31:58,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 273 treesize of output 173 [2022-11-19 07:31:58,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 126 [2022-11-19 07:31:58,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 1 [2022-11-19 07:31:59,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:59,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:59,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:59,083 INFO L321 Elim1Store]: treesize reduction 176, result has 14.6 percent of original size [2022-11-19 07:31:59,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 339 treesize of output 230 [2022-11-19 07:31:59,116 INFO L321 Elim1Store]: treesize reduction 31, result has 29.5 percent of original size [2022-11-19 07:31:59,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 2 case distinctions, treesize of input 239 treesize of output 198 [2022-11-19 07:31:59,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 1 [2022-11-19 07:31:59,636 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:31:59,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 07:31:59,688 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:31:59,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 07:31:59,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 07:31:59,713 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 07:31:59,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 07:31:59,756 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-19 07:31:59,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 92 [2022-11-19 07:31:59,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 74 [2022-11-19 07:31:59,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2022-11-19 07:31:59,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:59,820 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 07:31:59,820 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 168 treesize of output 117 [2022-11-19 07:31:59,846 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-19 07:31:59,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 96 [2022-11-19 07:31:59,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2022-11-19 07:31:59,959 INFO L321 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2022-11-19 07:31:59,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2022-11-19 07:31:59,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-11-19 07:31:59,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 07:32:00,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:00,027 INFO L321 Elim1Store]: treesize reduction 61, result has 10.3 percent of original size [2022-11-19 07:32:00,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 82 [2022-11-19 07:32:00,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 51 [2022-11-19 07:32:00,086 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:32:06,134 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17218#(and (or (and (<= |ULTIMATE.start_main_~n~0#1.offset| 0) (= |ULTIMATE.start_main_~root~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0)) (and (= |ULTIMATE.start_main_~root~0#1.offset| 0) (= |#NULL.offset| 0) (exists ((|v_ULTIMATE.start_main_~n~0#1.offset_177| Int) (|v_ULTIMATE.start_main_~n~0#1.base_195| Int)) (and (<= 0 |v_ULTIMATE.start_main_~n~0#1.offset_177|) (= (select |#valid| |v_ULTIMATE.start_main_~n~0#1.base_195|) 1) (<= (+ |v_ULTIMATE.start_main_~n~0#1.offset_177| 8) (select |#length| |v_ULTIMATE.start_main_~n~0#1.base_195|)) (= |ULTIMATE.start_main_~n~0#1.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~n~0#1.base_195|) (+ |v_ULTIMATE.start_main_~n~0#1.offset_177| 4))) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~n~0#1.base_195|) (+ |v_ULTIMATE.start_main_~n~0#1.offset_177| 4)) |ULTIMATE.start_main_~n~0#1.offset|))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) (not (= (select |#valid| |ULTIMATE.start_main_~n~0#1.base|) 1)))' at error location [2022-11-19 07:32:06,134 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:32:06,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:32:06,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 12] total 30 [2022-11-19 07:32:06,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246454138] [2022-11-19 07:32:06,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:32:06,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-19 07:32:06,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:32:06,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-19 07:32:06,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=2420, Unknown=19, NotChecked=0, Total=2756 [2022-11-19 07:32:06,136 INFO L87 Difference]: Start difference. First operand 666 states and 919 transitions. Second operand has 31 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:32:09,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:32:09,535 INFO L93 Difference]: Finished difference Result 1705 states and 2310 transitions. [2022-11-19 07:32:09,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-19 07:32:09,543 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-19 07:32:09,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:32:09,548 INFO L225 Difference]: With dead ends: 1705 [2022-11-19 07:32:09,548 INFO L226 Difference]: Without dead ends: 1705 [2022-11-19 07:32:09,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=650, Invalid=4441, Unknown=21, NotChecked=0, Total=5112 [2022-11-19 07:32:09,549 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 735 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 3395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2038 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:32:09,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 1030 Invalid, 3395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1279 Invalid, 0 Unknown, 2038 Unchecked, 2.1s Time] [2022-11-19 07:32:09,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2022-11-19 07:32:09,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 622. [2022-11-19 07:32:09,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 600 states have (on average 1.4533333333333334) internal successors, (872), 621 states have internal predecessors, (872), 0 states have call successors, (0), 0 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 07:32:09,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 872 transitions. [2022-11-19 07:32:09,585 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 872 transitions. Word has length 31 [2022-11-19 07:32:09,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:32:09,585 INFO L495 AbstractCegarLoop]: Abstraction has 622 states and 872 transitions. [2022-11-19 07:32:09,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:32:09,586 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 872 transitions. [2022-11-19 07:32:09,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-19 07:32:09,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:09,587 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:32:09,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:32:09,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-19 07:32:09,788 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-19 07:32:09,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:09,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1029369266, now seen corresponding path program 1 times [2022-11-19 07:32:09,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:32:09,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034118142] [2022-11-19 07:32:09,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:09,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:32:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:11,857 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:32:11,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:32:11,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034118142] [2022-11-19 07:32:11,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034118142] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:32:11,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994250468] [2022-11-19 07:32:11,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:11,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:11,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:32:11,859 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:32:11,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:32:12,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:12,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-19 07:32:12,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:32:12,290 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:32:12,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-19 07:32:12,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:32:12,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:32:12,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:32:12,581 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:32:12,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-11-19 07:32:12,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-19 07:32:12,701 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:32:12,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-11-19 07:32:12,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-19 07:32:13,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:13,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-11-19 07:32:13,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:13,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-19 07:32:13,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:32:13,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:32:14,341 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_main_~n~0#1.offset| 4))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) .cse1))) (and (forall ((v_ArrVal_1246 (Array Int Int)) (v_ArrVal_1244 (Array Int Int)) (v_ArrVal_1243 (Array Int Int)) (|v_ULTIMATE.start_main_~n~0#1.offset_180| Int)) (or (not (<= 0 |v_ULTIMATE.start_main_~n~0#1.offset_180|)) (<= 0 (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1243) (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1244) |c_ULTIMATE.start_main_~n~0#1.base|) .cse1) v_ArrVal_1246) |c_ULTIMATE.start_main_~root~0#1.base|) (+ |v_ULTIMATE.start_main_~n~0#1.offset_180| 4))) (not (<= |v_ULTIMATE.start_main_~n~0#1.offset_180| |c_ULTIMATE.start_main_~root~0#1.offset|)))) (forall ((v_ArrVal_1246 (Array Int Int)) (v_ArrVal_1245 (Array Int Int)) (v_ArrVal_1244 (Array Int Int)) (v_ArrVal_1243 (Array Int Int)) (|v_ULTIMATE.start_main_~n~0#1.offset_180| Int)) (or (let ((.cse4 (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1244))) (let ((.cse2 (select (select .cse4 |c_ULTIMATE.start_main_~n~0#1.base|) .cse1)) (.cse3 (+ |v_ULTIMATE.start_main_~n~0#1.offset_180| 4))) (<= (+ 4 (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1243) .cse2 v_ArrVal_1246) |c_ULTIMATE.start_main_~root~0#1.base|) .cse3)) (select |c_#length| (select (select (store .cse4 .cse2 v_ArrVal_1245) |c_ULTIMATE.start_main_~root~0#1.base|) .cse3))))) (not (<= 0 |v_ULTIMATE.start_main_~n~0#1.offset_180|)) (not (<= |v_ULTIMATE.start_main_~n~0#1.offset_180| |c_ULTIMATE.start_main_~root~0#1.offset|))))))) is different from false [2022-11-19 07:32:14,360 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:32:14,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 90 [2022-11-19 07:32:14,371 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:32:14,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 60 [2022-11-19 07:32:14,395 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:32:14,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 400 treesize of output 345 [2022-11-19 07:32:14,429 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:32:14,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1148 treesize of output 1081 [2022-11-19 07:32:14,448 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 1066 treesize of output 986 [2022-11-19 07:32:14,463 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 986 treesize of output 954 [2022-11-19 07:32:14,480 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 954 treesize of output 874 [2022-11-19 07:32:14,514 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:32:14,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 874 treesize of output 730 [2022-11-19 07:32:21,975 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:32:21,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 45 [2022-11-19 07:32:21,988 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:32:21,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-11-19 07:32:21,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:21,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-11-19 07:32:22,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:22,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:22,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:22,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2022-11-19 07:32:22,694 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:32:22,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 129 [2022-11-19 07:32:23,086 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:32:23,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994250468] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:32:23,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [43997477] [2022-11-19 07:32:23,088 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-19 07:32:23,088 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:32:23,088 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:32:23,088 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:32:23,088 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:32:23,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:23,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:23,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:32:23,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:23,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 07:32:23,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:32:23,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:32:23,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:23,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 07:32:23,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:23,181 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 34 treesize of output 21 [2022-11-19 07:32:23,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:23,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 07:32:23,355 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:32:23,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 07:32:23,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 07:32:23,375 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 07:32:23,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 07:32:23,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 07:32:23,431 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-19 07:32:23,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 92 [2022-11-19 07:32:23,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 74 [2022-11-19 07:32:23,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2022-11-19 07:32:23,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:23,487 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 07:32:23,488 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 168 treesize of output 117 [2022-11-19 07:32:23,513 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-19 07:32:23,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 96 [2022-11-19 07:32:23,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2022-11-19 07:32:23,618 INFO L321 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2022-11-19 07:32:23,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2022-11-19 07:32:23,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-11-19 07:32:23,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 07:32:23,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:23,686 INFO L321 Elim1Store]: treesize reduction 61, result has 10.3 percent of original size [2022-11-19 07:32:23,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 82 [2022-11-19 07:32:23,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 51 [2022-11-19 07:32:23,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:23,781 INFO L321 Elim1Store]: treesize reduction 88, result has 14.6 percent of original size [2022-11-19 07:32:23,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 273 treesize of output 173 [2022-11-19 07:32:23,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 126 [2022-11-19 07:32:23,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 1 [2022-11-19 07:32:23,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:23,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:23,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:23,932 INFO L321 Elim1Store]: treesize reduction 150, result has 13.8 percent of original size [2022-11-19 07:32:23,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 307 treesize of output 198 [2022-11-19 07:32:23,973 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-19 07:32:23,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 150 [2022-11-19 07:32:23,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 1 [2022-11-19 07:32:24,253 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:32:24,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 07:32:24,304 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:32:24,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 07:32:24,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 07:32:24,330 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 07:32:24,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 07:32:24,387 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-19 07:32:24,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 92 [2022-11-19 07:32:24,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 74 [2022-11-19 07:32:24,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 1 [2022-11-19 07:32:24,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:24,457 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-19 07:32:24,457 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 176 treesize of output 125 [2022-11-19 07:32:24,484 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-19 07:32:24,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 110 [2022-11-19 07:32:24,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 1 [2022-11-19 07:32:24,572 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:32:24,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 38 treesize of output 41 [2022-11-19 07:32:24,640 INFO L321 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2022-11-19 07:32:24,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2022-11-19 07:32:24,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 07:32:24,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:24,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:24,702 INFO L321 Elim1Store]: treesize reduction 89, result has 12.7 percent of original size [2022-11-19 07:32:24,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 136 treesize of output 102 [2022-11-19 07:32:24,717 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 07:32:24,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 83 [2022-11-19 07:32:24,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:24,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:24,804 INFO L321 Elim1Store]: treesize reduction 106, result has 15.2 percent of original size [2022-11-19 07:32:24,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 293 treesize of output 193 [2022-11-19 07:32:24,821 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 07:32:24,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 193 treesize of output 158 [2022-11-19 07:32:24,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 1 [2022-11-19 07:32:24,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:24,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:24,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:24,969 INFO L321 Elim1Store]: treesize reduction 150, result has 13.8 percent of original size [2022-11-19 07:32:24,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 307 treesize of output 198 [2022-11-19 07:32:25,007 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-19 07:32:25,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 150 [2022-11-19 07:32:25,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 1 [2022-11-19 07:32:25,487 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:32:25,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 07:32:25,525 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:32:25,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 07:32:25,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 07:32:25,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 07:32:25,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 07:32:25,587 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-19 07:32:25,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 92 [2022-11-19 07:32:25,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 74 [2022-11-19 07:32:25,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 1 [2022-11-19 07:32:25,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:25,645 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-19 07:32:25,646 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 176 treesize of output 125 [2022-11-19 07:32:25,670 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-19 07:32:25,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 110 [2022-11-19 07:32:25,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 1 [2022-11-19 07:32:25,771 INFO L321 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2022-11-19 07:32:25,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2022-11-19 07:32:25,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 37 [2022-11-19 07:32:25,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:25,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:25,838 INFO L321 Elim1Store]: treesize reduction 89, result has 12.7 percent of original size [2022-11-19 07:32:25,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 136 treesize of output 102 [2022-11-19 07:32:25,854 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 07:32:25,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 83 [2022-11-19 07:32:25,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 07:32:25,896 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:32:32,233 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19839#(and (= |ULTIMATE.start_main_~root~0#1.offset| 0) (or (not (<= (+ |ULTIMATE.start_main_~n~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~n~0#1.base|))) (not (<= 0 |ULTIMATE.start_main_~n~0#1.offset|))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:32:32,233 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:32:32,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:32:32,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11, 12] total 41 [2022-11-19 07:32:32,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411833827] [2022-11-19 07:32:32,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:32:32,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-19 07:32:32,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:32:32,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-19 07:32:32,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=3599, Unknown=28, NotChecked=124, Total=4160 [2022-11-19 07:32:32,235 INFO L87 Difference]: Start difference. First operand 622 states and 872 transitions. Second operand has 43 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 07:32:55,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:32:55,179 INFO L93 Difference]: Finished difference Result 2512 states and 3395 transitions. [2022-11-19 07:32:55,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-11-19 07:32:55,179 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-19 07:32:55,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:32:55,185 INFO L225 Difference]: With dead ends: 2512 [2022-11-19 07:32:55,185 INFO L226 Difference]: Without dead ends: 2512 [2022-11-19 07:32:55,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 58 SyntacticMatches, 20 SemanticMatches, 174 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 12988 ImplicationChecksByTransitivity, 27.3s TimeCoverageRelationStatistics Valid=4567, Invalid=25858, Unknown=29, NotChecked=346, Total=30800 [2022-11-19 07:32:55,188 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 2400 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 2362 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2400 SdHoareTripleChecker+Valid, 1360 SdHoareTripleChecker+Invalid, 5184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 2362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2496 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:32:55,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2400 Valid, 1360 Invalid, 5184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 2362 Invalid, 0 Unknown, 2496 Unchecked, 4.4s Time] [2022-11-19 07:32:55,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2512 states. [2022-11-19 07:32:55,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2512 to 1168. [2022-11-19 07:32:55,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1146 states have (on average 1.463350785340314) internal successors, (1677), 1167 states have internal predecessors, (1677), 0 states have call successors, (0), 0 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 07:32:55,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1677 transitions. [2022-11-19 07:32:55,229 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1677 transitions. Word has length 31 [2022-11-19 07:32:55,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:32:55,229 INFO L495 AbstractCegarLoop]: Abstraction has 1168 states and 1677 transitions. [2022-11-19 07:32:55,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 07:32:55,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1677 transitions. [2022-11-19 07:32:55,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-19 07:32:55,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:55,231 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:32:55,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-19 07:32:55,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:55,436 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-19 07:32:55,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:55,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1029363530, now seen corresponding path program 1 times [2022-11-19 07:32:55,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:32:55,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785810614] [2022-11-19 07:32:55,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:55,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:32:55,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:56,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:32:56,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:32:56,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785810614] [2022-11-19 07:32:56,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785810614] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:32:56,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936260313] [2022-11-19 07:32:56,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:56,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:56,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:32:56,405 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:32:56,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1259c3a3-4974-4745-978b-a08bf1306e0b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:32:56,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:56,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-19 07:32:56,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:32:56,777 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:32:56,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-19 07:32:56,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:32:57,051 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:32:57,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2022-11-19 07:32:57,177 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:32:57,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-11-19 07:32:57,351 INFO L321 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2022-11-19 07:32:57,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 26 treesize of output 41 [2022-11-19 07:32:57,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:57,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 07:32:57,739 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:32:57,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 49 [2022-11-19 07:32:57,897 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:32:57,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 49 [2022-11-19 07:32:58,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 21 [2022-11-19 07:32:58,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:32:58,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:32:58,346 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1363 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem22#1.base| v_ArrVal_1363) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|)) 1)) is different from false [2022-11-19 07:32:58,475 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1363 (Array Int Int)) (v_ArrVal_1362 (Array Int Int))) (= (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem21#1.base| v_ArrVal_1362))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~n~0#1.base|) (+ |c_ULTIMATE.start_main_~n~0#1.offset| 4)) v_ArrVal_1363)) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|)) 1)) is different from false [2022-11-19 07:32:58,608 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1363 (Array Int Int)) (v_ArrVal_1362 (Array Int Int))) (= (select |c_#valid| (select (select (let ((.cse1 (+ |c_ULTIMATE.start_main_~n~0#1.offset| 4))) (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) .cse1 |c_ULTIMATE.start_main_#t~malloc20#1.base|)) |c_ULTIMATE.start_main_#t~malloc20#1.base| v_ArrVal_1362))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~n~0#1.base|) .cse1) v_ArrVal_1363))) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|)) 1)) is different from false [2022-11-19 07:32:58,624 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_#t~malloc20#1.base_36| Int) (v_ArrVal_1363 (Array Int Int)) (v_ArrVal_1362 (Array Int Int)) (v_ArrVal_1359 Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc20#1.base_36|) 0)) (= (select (store |c_#valid| |v_ULTIMATE.start_main_#t~malloc20#1.base_36| v_ArrVal_1359) (select (select (let ((.cse1 (+ |c_ULTIMATE.start_main_~n~0#1.offset| 4))) (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) .cse1 |v_ULTIMATE.start_main_#t~malloc20#1.base_36|)) |v_ULTIMATE.start_main_#t~malloc20#1.base_36| v_ArrVal_1362))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~n~0#1.base|) .cse1) v_ArrVal_1363))) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|)) 1))) is different from false [2022-11-19 07:32:59,047 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:32:59,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 121 [2022-11-19 07:32:59,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:59,212 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:32:59,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 850478 treesize of output 846530 [2022-11-19 07:33:04,436 INFO L321 Elim1Store]: treesize reduction 331, result has 63.8 percent of original size [2022-11-19 07:33:04,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 1471168 treesize of output 1282298 [2022-11-19 07:33:09,934 WARN L233 SmtUtils]: Spent 5.49s on a formula simplification that was a NOOP. DAG size: 2836 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:33:20,288 WARN L233 SmtUtils]: Spent 10.33s on a formula simplification. DAG size of input: 2802 DAG size of output: 2801 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:33:20,541 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 1281799 treesize of output 1199861 [2022-11-19 07:33:25,752 WARN L233 SmtUtils]: Spent 5.21s on a formula simplification that was a NOOP. DAG size: 2800 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:33:25,868 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 1238337 treesize of output 1217837 [2022-11-19 07:34:42,097 WARN L233 SmtUtils]: Spent 1.27m on a formula simplification. DAG size of input: 2804 DAG size of output: 2801 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:34:42,306 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 1184515 treesize of output 1143537 [2022-11-19 07:34:48,035 WARN L233 SmtUtils]: Spent 5.73s on a formula simplification that was a NOOP. DAG size: 2800 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:34:48,233 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:34:48,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1174400 treesize of output 1159726 [2022-11-19 07:35:51,808 WARN L233 SmtUtils]: Spent 1.06m on a formula simplification. DAG size of input: 2802 DAG size of output: 2799 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:36:07,332 WARN L233 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 1487 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:37:25,566 WARN L233 SmtUtils]: Spent 16.56s on a formula simplification. DAG size of input: 1481 DAG size of output: 1481 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:37:47,016 WARN L233 SmtUtils]: Spent 12.14s on a formula simplification. DAG size of input: 1065 DAG size of output: 1065 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:38:04,287 WARN L233 SmtUtils]: Spent 8.26s on a formula simplification. DAG size of input: 1063 DAG size of output: 1063 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:38:13,800 WARN L233 SmtUtils]: Spent 8.89s on a formula simplification. DAG size of input: 1063 DAG size of output: 1063 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:38:28,090 WARN L233 SmtUtils]: Spent 8.93s on a formula simplification. DAG size of input: 1063 DAG size of output: 1063 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:38:42,368 WARN L233 SmtUtils]: Spent 8.55s on a formula simplification. DAG size of input: 1063 DAG size of output: 1063 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:38:52,180 WARN L233 SmtUtils]: Spent 9.17s on a formula simplification. DAG size of input: 1063 DAG size of output: 1063 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:40:32,773 WARN L233 SmtUtils]: Spent 9.30s on a formula simplification. DAG size of input: 1063 DAG size of output: 1063 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:40:54,211 WARN L233 SmtUtils]: Spent 9.31s on a formula simplification. DAG size of input: 1063 DAG size of output: 1063 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:41:09,961 WARN L233 SmtUtils]: Spent 9.40s on a formula simplification. DAG size of input: 1063 DAG size of output: 1063 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:41:29,532 WARN L233 SmtUtils]: Spent 9.40s on a formula simplification. DAG size of input: 1063 DAG size of output: 1063 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:41:46,663 WARN L233 SmtUtils]: Spent 8.65s on a formula simplification. DAG size of input: 1061 DAG size of output: 1061 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:41:56,183 WARN L233 SmtUtils]: Spent 8.86s on a formula simplification. DAG size of input: 1061 DAG size of output: 1061 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:42:06,538 WARN L233 SmtUtils]: Spent 9.67s on a formula simplification. DAG size of input: 1061 DAG size of output: 1061 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:42:25,967 WARN L233 SmtUtils]: Spent 8.97s on a formula simplification. DAG size of input: 1061 DAG size of output: 1061 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:43:03,242 WARN L233 SmtUtils]: Spent 8.89s on a formula simplification. DAG size of input: 1061 DAG size of output: 1061 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:43:16,810 WARN L233 SmtUtils]: Spent 9.04s on a formula simplification. DAG size of input: 1061 DAG size of output: 1061 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:43:27,000 WARN L233 SmtUtils]: Spent 9.54s on a formula simplification. DAG size of input: 1061 DAG size of output: 1061 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:43:37,522 WARN L233 SmtUtils]: Spent 9.37s on a formula simplification. DAG size of input: 1061 DAG size of output: 1061 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:43:55,072 WARN L233 SmtUtils]: Spent 9.60s on a formula simplification. DAG size of input: 1059 DAG size of output: 1059 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:44:05,620 WARN L233 SmtUtils]: Spent 9.87s on a formula simplification. DAG size of input: 1057 DAG size of output: 1057 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)