./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/test-0214_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 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_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0214_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba --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 8cac36e956b24d42ea840a07609fb159882a2e76b1195da25a4d4343e0b31026 --- 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-b5237d8 [2022-11-22 01:32:03,980 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:32:03,983 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:32:04,008 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:32:04,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:32:04,014 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:32:04,017 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:32:04,019 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:32:04,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:32:04,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:32:04,022 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:32:04,023 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:32:04,023 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:32:04,025 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:32:04,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:32:04,027 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:32:04,028 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:32:04,028 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:32:04,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:32:04,032 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:32:04,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:32:04,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:32:04,035 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:32:04,036 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:32:04,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:32:04,040 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:32:04,040 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:32:04,041 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:32:04,042 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:32:04,042 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:32:04,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:32:04,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:32:04,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:32:04,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:32:04,046 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:32:04,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:32:04,053 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:32:04,054 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:32:04,054 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:32:04,055 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:32:04,055 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:32:04,059 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-22 01:32:04,095 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:32:04,095 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:32:04,096 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:32:04,096 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:32:04,097 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:32:04,097 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:32:04,097 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:32:04,097 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:32:04,097 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:32:04,097 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:32:04,098 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:32:04,098 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:32:04,098 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:32:04,098 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:32:04,098 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:32:04,098 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:32:04,099 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:32:04,099 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:32:04,099 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 01:32:04,100 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 01:32:04,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:32:04,100 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:32:04,100 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 01:32:04,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:32:04,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:32:04,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:32:04,101 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 01:32:04,101 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 01:32:04,101 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 01:32:04,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:32:04,101 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 01:32:04,102 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:32:04,102 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:32:04,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:32:04,102 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:32:04,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:32:04,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:32:04,107 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:32:04,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:32:04,108 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:32:04,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:32:04,108 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:32:04,108 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_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8cac36e956b24d42ea840a07609fb159882a2e76b1195da25a4d4343e0b31026 [2022-11-22 01:32:04,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:32:04,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:32:04,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:32:04,402 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:32:04,403 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:32:04,404 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/list-ext-properties/test-0214_1.i [2022-11-22 01:32:07,532 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:32:07,861 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:32:07,866 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/sv-benchmarks/c/list-ext-properties/test-0214_1.i [2022-11-22 01:32:07,889 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/data/fe9289a6e/221a1142f4a44dc7abe9d26eefeee79a/FLAGf9b01ea67 [2022-11-22 01:32:07,907 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/data/fe9289a6e/221a1142f4a44dc7abe9d26eefeee79a [2022-11-22 01:32:07,913 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:32:07,916 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:32:07,917 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:32:07,918 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:32:07,921 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:32:07,923 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:32:07" (1/1) ... [2022-11-22 01:32:07,925 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e6dc456 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:32:07, skipping insertion in model container [2022-11-22 01:32:07,926 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:32:07" (1/1) ... [2022-11-22 01:32:07,934 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:32:07,989 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:32:08,543 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:32:08,559 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:32:08,604 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:32:08,644 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:32:08,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:32:08 WrapperNode [2022-11-22 01:32:08,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:32:08,647 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:32:08,647 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:32:08,647 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:32:08,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:32:08" (1/1) ... [2022-11-22 01:32:08,715 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:32:08" (1/1) ... [2022-11-22 01:32:08,744 INFO L138 Inliner]: procedures = 181, calls = 43, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 215 [2022-11-22 01:32:08,745 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:32:08,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:32:08,746 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:32:08,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:32:08,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:32:08" (1/1) ... [2022-11-22 01:32:08,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:32:08" (1/1) ... [2022-11-22 01:32:08,760 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:32:08" (1/1) ... [2022-11-22 01:32:08,760 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:32:08" (1/1) ... [2022-11-22 01:32:08,769 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:32:08" (1/1) ... [2022-11-22 01:32:08,774 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:32:08" (1/1) ... [2022-11-22 01:32:08,776 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:32:08" (1/1) ... [2022-11-22 01:32:08,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:32:08" (1/1) ... [2022-11-22 01:32:08,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:32:08,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:32:08,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:32:08,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:32:08,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:32:08" (1/1) ... [2022-11-22 01:32:08,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:32:08,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:32:08,821 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:32:08,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:32:08,870 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2022-11-22 01:32:08,871 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2022-11-22 01:32:08,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 01:32:08,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 01:32:08,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:32:08,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-22 01:32:08,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-22 01:32:08,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:32:08,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-22 01:32:08,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:32:08,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:32:08,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:32:09,087 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:32:09,089 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:32:09,574 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:32:09,668 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:32:09,668 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-22 01:32:09,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:32:09 BoogieIcfgContainer [2022-11-22 01:32:09,671 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:32:09,674 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:32:09,674 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:32:09,678 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:32:09,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:32:07" (1/3) ... [2022-11-22 01:32:09,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45d9634c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:32:09, skipping insertion in model container [2022-11-22 01:32:09,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:32:08" (2/3) ... [2022-11-22 01:32:09,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45d9634c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:32:09, skipping insertion in model container [2022-11-22 01:32:09,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:32:09" (3/3) ... [2022-11-22 01:32:09,681 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0214_1.i [2022-11-22 01:32:09,702 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:32:09,702 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 57 error locations. [2022-11-22 01:32:09,752 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:32:09,760 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;@3bbed56f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:32:09,760 INFO L358 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2022-11-22 01:32:09,765 INFO L276 IsEmpty]: Start isEmpty. Operand has 123 states, 62 states have (on average 2.161290322580645) internal successors, (134), 119 states have internal predecessors, (134), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:32:09,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-22 01:32:09,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:32:09,773 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-22 01:32:09,773 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:32:09,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:32:09,780 INFO L85 PathProgramCache]: Analyzing trace with hash 9494517, now seen corresponding path program 1 times [2022-11-22 01:32:09,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:32:09,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105308325] [2022-11-22 01:32:09,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:32:09,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:32:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:32:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:32:09,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:32:09,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105308325] [2022-11-22 01:32:09,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105308325] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:32:09,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:32:09,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:32:09,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258721664] [2022-11-22 01:32:09,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:32:09,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-22 01:32:10,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:32:10,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-22 01:32:10,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 01:32:10,059 INFO L87 Difference]: Start difference. First operand has 123 states, 62 states have (on average 2.161290322580645) internal successors, (134), 119 states have internal predecessors, (134), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:32:10,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:32:10,166 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2022-11-22 01:32:10,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-22 01:32:10,169 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-22 01:32:10,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:32:10,178 INFO L225 Difference]: With dead ends: 123 [2022-11-22 01:32:10,179 INFO L226 Difference]: Without dead ends: 121 [2022-11-22 01:32:10,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 01:32:10,185 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:32:10,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 114 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:32:10,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-22 01:32:10,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-11-22 01:32:10,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 61 states have (on average 2.098360655737705) internal successors, (128), 117 states have internal predecessors, (128), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:32:10,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 132 transitions. [2022-11-22 01:32:10,283 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 132 transitions. Word has length 4 [2022-11-22 01:32:10,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:32:10,283 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 132 transitions. [2022-11-22 01:32:10,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:32:10,284 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 132 transitions. [2022-11-22 01:32:10,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 01:32:10,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:32:10,285 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 01:32:10,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:32:10,286 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:32:10,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:32:10,288 INFO L85 PathProgramCache]: Analyzing trace with hash 295854258, now seen corresponding path program 1 times [2022-11-22 01:32:10,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:32:10,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195831512] [2022-11-22 01:32:10,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:32:10,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:32:10,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:32:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:32:10,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:32:10,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195831512] [2022-11-22 01:32:10,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195831512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:32:10,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:32:10,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:32:10,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526515479] [2022-11-22 01:32:10,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:32:10,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:32:10,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:32:10,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:32:10,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:32:10,600 INFO L87 Difference]: Start difference. First operand 121 states and 132 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:32:10,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:32:10,939 INFO L93 Difference]: Finished difference Result 207 states and 226 transitions. [2022-11-22 01:32:10,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:32:10,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-22 01:32:10,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:32:10,947 INFO L225 Difference]: With dead ends: 207 [2022-11-22 01:32:10,948 INFO L226 Difference]: Without dead ends: 207 [2022-11-22 01:32:10,949 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 [2022-11-22 01:32:10,951 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 105 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:32:10,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 236 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:32:10,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-11-22 01:32:10,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 161. [2022-11-22 01:32:10,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 98 states have (on average 2.061224489795918) internal successors, (202), 155 states have internal predecessors, (202), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 01:32:10,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 210 transitions. [2022-11-22 01:32:10,977 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 210 transitions. Word has length 5 [2022-11-22 01:32:10,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:32:10,982 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 210 transitions. [2022-11-22 01:32:10,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:32:10,982 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 210 transitions. [2022-11-22 01:32:10,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 01:32:10,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:32:10,983 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 01:32:10,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 01:32:10,983 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:32:10,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:32:10,985 INFO L85 PathProgramCache]: Analyzing trace with hash 295854257, now seen corresponding path program 1 times [2022-11-22 01:32:10,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:32:10,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710339093] [2022-11-22 01:32:10,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:32:10,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:32:11,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:32:11,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:32:11,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:32:11,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710339093] [2022-11-22 01:32:11,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710339093] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:32:11,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:32:11,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:32:11,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662014614] [2022-11-22 01:32:11,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:32:11,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:32:11,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:32:11,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:32:11,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:32:11,088 INFO L87 Difference]: Start difference. First operand 161 states and 210 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:32:11,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:32:11,308 INFO L93 Difference]: Finished difference Result 312 states and 405 transitions. [2022-11-22 01:32:11,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:32:11,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-22 01:32:11,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:32:11,312 INFO L225 Difference]: With dead ends: 312 [2022-11-22 01:32:11,312 INFO L226 Difference]: Without dead ends: 312 [2022-11-22 01:32:11,312 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 [2022-11-22 01:32:11,314 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 116 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:32:11,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 132 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:32:11,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-11-22 01:32:11,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 218. [2022-11-22 01:32:11,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 149 states have (on average 1.9798657718120805) internal successors, (295), 207 states have internal predecessors, (295), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-22 01:32:11,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 311 transitions. [2022-11-22 01:32:11,330 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 311 transitions. Word has length 5 [2022-11-22 01:32:11,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:32:11,330 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 311 transitions. [2022-11-22 01:32:11,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:32:11,331 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 311 transitions. [2022-11-22 01:32:11,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 01:32:11,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:32:11,331 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:32:11,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 01:32:11,332 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:32:11,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:32:11,333 INFO L85 PathProgramCache]: Analyzing trace with hash 848151012, now seen corresponding path program 1 times [2022-11-22 01:32:11,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:32:11,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155241981] [2022-11-22 01:32:11,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:32:11,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:32:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:32:11,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:32:11,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:32:11,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155241981] [2022-11-22 01:32:11,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155241981] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:32:11,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:32:11,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:32:11,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598586242] [2022-11-22 01:32:11,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:32:11,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:32:11,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:32:11,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:32:11,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:32:11,399 INFO L87 Difference]: Start difference. First operand 218 states and 311 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:32:11,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:32:11,565 INFO L93 Difference]: Finished difference Result 277 states and 367 transitions. [2022-11-22 01:32:11,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:32:11,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-22 01:32:11,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:32:11,567 INFO L225 Difference]: With dead ends: 277 [2022-11-22 01:32:11,567 INFO L226 Difference]: Without dead ends: 276 [2022-11-22 01:32:11,568 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 [2022-11-22 01:32:11,574 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 71 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:32:11,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 154 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:32:11,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-22 01:32:11,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 219. [2022-11-22 01:32:11,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 150 states have (on average 1.9733333333333334) internal successors, (296), 208 states have internal predecessors, (296), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-22 01:32:11,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 312 transitions. [2022-11-22 01:32:11,589 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 312 transitions. Word has length 7 [2022-11-22 01:32:11,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:32:11,589 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 312 transitions. [2022-11-22 01:32:11,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:32:11,590 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 312 transitions. [2022-11-22 01:32:11,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 01:32:11,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:32:11,591 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:32:11,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 01:32:11,591 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:32:11,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:32:11,592 INFO L85 PathProgramCache]: Analyzing trace with hash 848149727, now seen corresponding path program 1 times [2022-11-22 01:32:11,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:32:11,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553036305] [2022-11-22 01:32:11,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:32:11,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:32:11,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:32:11,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:32:11,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:32:11,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553036305] [2022-11-22 01:32:11,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553036305] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:32:11,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:32:11,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:32:11,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212867691] [2022-11-22 01:32:11,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:32:11,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:32:11,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:32:11,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:32:11,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:32:11,634 INFO L87 Difference]: Start difference. First operand 219 states and 312 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:32:11,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:32:11,714 INFO L93 Difference]: Finished difference Result 306 states and 393 transitions. [2022-11-22 01:32:11,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:32:11,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-22 01:32:11,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:32:11,716 INFO L225 Difference]: With dead ends: 306 [2022-11-22 01:32:11,716 INFO L226 Difference]: Without dead ends: 303 [2022-11-22 01:32:11,717 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 [2022-11-22 01:32:11,718 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 109 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:32:11,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 223 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:32:11,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-11-22 01:32:11,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 217. [2022-11-22 01:32:11,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 148 states have (on average 1.9797297297297298) internal successors, (293), 206 states have internal predecessors, (293), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-22 01:32:11,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 309 transitions. [2022-11-22 01:32:11,743 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 309 transitions. Word has length 7 [2022-11-22 01:32:11,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:32:11,743 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 309 transitions. [2022-11-22 01:32:11,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:32:11,744 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 309 transitions. [2022-11-22 01:32:11,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 01:32:11,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:32:11,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:32:11,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 01:32:11,746 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:32:11,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:32:11,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1496074725, now seen corresponding path program 1 times [2022-11-22 01:32:11,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:32:11,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680715839] [2022-11-22 01:32:11,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:32:11,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:32:11,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:32:11,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:32:11,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:32:11,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680715839] [2022-11-22 01:32:11,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680715839] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:32:11,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:32:11,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:32:11,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433212581] [2022-11-22 01:32:11,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:32:11,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:32:11,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:32:11,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:32:11,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:32:11,881 INFO L87 Difference]: Start difference. First operand 217 states and 309 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:12,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:32:12,236 INFO L93 Difference]: Finished difference Result 333 states and 398 transitions. [2022-11-22 01:32:12,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:32:12,237 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-11-22 01:32:12,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:32:12,239 INFO L225 Difference]: With dead ends: 333 [2022-11-22 01:32:12,239 INFO L226 Difference]: Without dead ends: 333 [2022-11-22 01:32:12,239 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 [2022-11-22 01:32:12,240 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 216 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:32:12,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 223 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:32:12,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-11-22 01:32:12,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 217. [2022-11-22 01:32:12,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 148 states have (on average 1.9391891891891893) internal successors, (287), 206 states have internal predecessors, (287), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-22 01:32:12,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 303 transitions. [2022-11-22 01:32:12,250 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 303 transitions. Word has length 10 [2022-11-22 01:32:12,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:32:12,251 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 303 transitions. [2022-11-22 01:32:12,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:12,251 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 303 transitions. [2022-11-22 01:32:12,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 01:32:12,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:32:12,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:32:12,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 01:32:12,253 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:32:12,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:32:12,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1496074726, now seen corresponding path program 1 times [2022-11-22 01:32:12,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:32:12,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065825174] [2022-11-22 01:32:12,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:32:12,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:32:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:32:12,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:32:12,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:32:12,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065825174] [2022-11-22 01:32:12,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065825174] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:32:12,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:32:12,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 01:32:12,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655276739] [2022-11-22 01:32:12,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:32:12,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:32:12,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:32:12,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:32:12,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:32:12,451 INFO L87 Difference]: Start difference. First operand 217 states and 303 transitions. Second operand has 6 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:13,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:32:13,021 INFO L93 Difference]: Finished difference Result 402 states and 496 transitions. [2022-11-22 01:32:13,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:32:13,022 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-11-22 01:32:13,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:32:13,023 INFO L225 Difference]: With dead ends: 402 [2022-11-22 01:32:13,023 INFO L226 Difference]: Without dead ends: 402 [2022-11-22 01:32:13,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:32:13,024 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 200 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:32:13,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 506 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 01:32:13,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-11-22 01:32:13,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 237. [2022-11-22 01:32:13,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 168 states have (on average 1.9464285714285714) internal successors, (327), 224 states have internal predecessors, (327), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-22 01:32:13,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 343 transitions. [2022-11-22 01:32:13,032 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 343 transitions. Word has length 10 [2022-11-22 01:32:13,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:32:13,033 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 343 transitions. [2022-11-22 01:32:13,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:13,033 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 343 transitions. [2022-11-22 01:32:13,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 01:32:13,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:32:13,047 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:32:13,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 01:32:13,048 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:32:13,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:32:13,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1502673227, now seen corresponding path program 1 times [2022-11-22 01:32:13,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:32:13,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355626920] [2022-11-22 01:32:13,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:32:13,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:32:13,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:32:13,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:32:13,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:32:13,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355626920] [2022-11-22 01:32:13,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355626920] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:32:13,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:32:13,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:32:13,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790551406] [2022-11-22 01:32:13,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:32:13,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:32:13,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:32:13,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:32:13,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:32:13,170 INFO L87 Difference]: Start difference. First operand 237 states and 343 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:13,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:32:13,478 INFO L93 Difference]: Finished difference Result 398 states and 528 transitions. [2022-11-22 01:32:13,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:32:13,479 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-11-22 01:32:13,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:32:13,480 INFO L225 Difference]: With dead ends: 398 [2022-11-22 01:32:13,481 INFO L226 Difference]: Without dead ends: 398 [2022-11-22 01:32:13,481 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 [2022-11-22 01:32:13,482 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 208 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:32:13,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 226 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:32:13,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-11-22 01:32:13,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 243. [2022-11-22 01:32:13,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 174 states have (on average 1.9137931034482758) internal successors, (333), 230 states have internal predecessors, (333), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-22 01:32:13,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 349 transitions. [2022-11-22 01:32:13,492 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 349 transitions. Word has length 12 [2022-11-22 01:32:13,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:32:13,493 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 349 transitions. [2022-11-22 01:32:13,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:13,493 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 349 transitions. [2022-11-22 01:32:13,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 01:32:13,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:32:13,494 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:32:13,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 01:32:13,494 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:32:13,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:32:13,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1502673226, now seen corresponding path program 1 times [2022-11-22 01:32:13,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:32:13,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220800169] [2022-11-22 01:32:13,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:32:13,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:32:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:32:13,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:32:13,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:32:13,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220800169] [2022-11-22 01:32:13,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220800169] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:32:13,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:32:13,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:32:13,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679541549] [2022-11-22 01:32:13,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:32:13,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:32:13,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:32:13,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:32:13,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:32:13,626 INFO L87 Difference]: Start difference. First operand 243 states and 349 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:13,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:32:13,881 INFO L93 Difference]: Finished difference Result 285 states and 360 transitions. [2022-11-22 01:32:13,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:32:13,882 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-11-22 01:32:13,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:32:13,883 INFO L225 Difference]: With dead ends: 285 [2022-11-22 01:32:13,884 INFO L226 Difference]: Without dead ends: 285 [2022-11-22 01:32:13,884 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 [2022-11-22 01:32:13,885 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 146 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:32:13,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 237 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:32:13,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-11-22 01:32:13,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 243. [2022-11-22 01:32:13,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 174 states have (on average 1.8793103448275863) internal successors, (327), 230 states have internal predecessors, (327), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-22 01:32:13,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 343 transitions. [2022-11-22 01:32:13,894 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 343 transitions. Word has length 12 [2022-11-22 01:32:13,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:32:13,894 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 343 transitions. [2022-11-22 01:32:13,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:13,894 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 343 transitions. [2022-11-22 01:32:13,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 01:32:13,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:32:13,895 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:32:13,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 01:32:13,896 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:32:13,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:32:13,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1085998047, now seen corresponding path program 1 times [2022-11-22 01:32:13,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:32:13,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769665353] [2022-11-22 01:32:13,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:32:13,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:32:13,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:32:13,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:32:13,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:32:13,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769665353] [2022-11-22 01:32:13,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769665353] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:32:13,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:32:13,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:32:13,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375858828] [2022-11-22 01:32:13,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:32:13,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:32:13,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:32:13,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:32:13,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:32:13,965 INFO L87 Difference]: Start difference. First operand 243 states and 343 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:14,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:32:14,119 INFO L93 Difference]: Finished difference Result 320 states and 419 transitions. [2022-11-22 01:32:14,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:32:14,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-11-22 01:32:14,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:32:14,122 INFO L225 Difference]: With dead ends: 320 [2022-11-22 01:32:14,122 INFO L226 Difference]: Without dead ends: 320 [2022-11-22 01:32:14,122 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 [2022-11-22 01:32:14,123 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 111 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:32:14,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 174 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:32:14,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-11-22 01:32:14,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 240. [2022-11-22 01:32:14,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 174 states have (on average 1.8103448275862069) internal successors, (315), 227 states have internal predecessors, (315), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-22 01:32:14,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 331 transitions. [2022-11-22 01:32:14,135 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 331 transitions. Word has length 12 [2022-11-22 01:32:14,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:32:14,136 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 331 transitions. [2022-11-22 01:32:14,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:14,136 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 331 transitions. [2022-11-22 01:32:14,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 01:32:14,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:32:14,137 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:32:14,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 01:32:14,138 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:32:14,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:32:14,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1085998046, now seen corresponding path program 1 times [2022-11-22 01:32:14,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:32:14,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726757209] [2022-11-22 01:32:14,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:32:14,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:32:14,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:32:14,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:32:14,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:32:14,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726757209] [2022-11-22 01:32:14,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726757209] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:32:14,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:32:14,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 01:32:14,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304963190] [2022-11-22 01:32:14,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:32:14,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:32:14,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:32:14,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:32:14,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:32:14,390 INFO L87 Difference]: Start difference. First operand 240 states and 331 transitions. Second operand has 7 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:14,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:32:14,694 INFO L93 Difference]: Finished difference Result 268 states and 324 transitions. [2022-11-22 01:32:14,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:32:14,695 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-11-22 01:32:14,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:32:14,696 INFO L225 Difference]: With dead ends: 268 [2022-11-22 01:32:14,697 INFO L226 Difference]: Without dead ends: 268 [2022-11-22 01:32:14,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-22 01:32:14,698 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 393 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:32:14,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 527 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:32:14,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-11-22 01:32:14,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 238. [2022-11-22 01:32:14,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 174 states have (on average 1.764367816091954) internal successors, (307), 225 states have internal predecessors, (307), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-22 01:32:14,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 323 transitions. [2022-11-22 01:32:14,708 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 323 transitions. Word has length 12 [2022-11-22 01:32:14,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:32:14,709 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 323 transitions. [2022-11-22 01:32:14,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:14,709 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 323 transitions. [2022-11-22 01:32:14,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 01:32:14,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:32:14,710 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:32:14,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-22 01:32:14,710 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:32:14,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:32:14,711 INFO L85 PathProgramCache]: Analyzing trace with hash 693798951, now seen corresponding path program 1 times [2022-11-22 01:32:14,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:32:14,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103284337] [2022-11-22 01:32:14,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:32:14,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:32:14,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:32:14,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:32:14,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:32:14,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103284337] [2022-11-22 01:32:14,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103284337] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:32:14,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:32:14,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 01:32:14,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147418292] [2022-11-22 01:32:14,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:32:14,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:32:14,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:32:14,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:32:14,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:32:14,976 INFO L87 Difference]: Start difference. First operand 238 states and 323 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:15,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:32:15,347 INFO L93 Difference]: Finished difference Result 267 states and 320 transitions. [2022-11-22 01:32:15,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 01:32:15,351 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-11-22 01:32:15,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:32:15,353 INFO L225 Difference]: With dead ends: 267 [2022-11-22 01:32:15,353 INFO L226 Difference]: Without dead ends: 267 [2022-11-22 01:32:15,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-22 01:32:15,354 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 512 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:32:15,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 505 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:32:15,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-11-22 01:32:15,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 237. [2022-11-22 01:32:15,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 174 states have (on average 1.7413793103448276) internal successors, (303), 224 states have internal predecessors, (303), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-22 01:32:15,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 319 transitions. [2022-11-22 01:32:15,363 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 319 transitions. Word has length 13 [2022-11-22 01:32:15,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:32:15,364 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 319 transitions. [2022-11-22 01:32:15,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:15,364 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 319 transitions. [2022-11-22 01:32:15,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-22 01:32:15,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:32:15,367 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:32:15,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-22 01:32:15,368 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:32:15,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:32:15,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1038357882, now seen corresponding path program 1 times [2022-11-22 01:32:15,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:32:15,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199846896] [2022-11-22 01:32:15,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:32:15,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:32:15,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:32:15,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:32:15,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:32:15,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199846896] [2022-11-22 01:32:15,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199846896] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:32:15,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:32:15,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 01:32:15,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347862879] [2022-11-22 01:32:15,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:32:15,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:32:15,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:32:15,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:32:15,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:32:15,858 INFO L87 Difference]: Start difference. First operand 237 states and 319 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:16,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:32:16,424 INFO L93 Difference]: Finished difference Result 327 states and 422 transitions. [2022-11-22 01:32:16,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 01:32:16,425 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-11-22 01:32:16,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:32:16,427 INFO L225 Difference]: With dead ends: 327 [2022-11-22 01:32:16,427 INFO L226 Difference]: Without dead ends: 325 [2022-11-22 01:32:16,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-11-22 01:32:16,428 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 196 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:32:16,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 366 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:32:16,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-11-22 01:32:16,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 276. [2022-11-22 01:32:16,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 208 states have (on average 1.7163461538461537) internal successors, (357), 259 states have internal predecessors, (357), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-22 01:32:16,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 379 transitions. [2022-11-22 01:32:16,438 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 379 transitions. Word has length 16 [2022-11-22 01:32:16,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:32:16,439 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 379 transitions. [2022-11-22 01:32:16,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:16,439 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 379 transitions. [2022-11-22 01:32:16,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-22 01:32:16,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:32:16,445 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:32:16,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 01:32:16,447 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:32:16,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:32:16,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1582127119, now seen corresponding path program 1 times [2022-11-22 01:32:16,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:32:16,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029327652] [2022-11-22 01:32:16,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:32:16,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:32:16,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:32:16,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:32:16,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:32:16,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029327652] [2022-11-22 01:32:16,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029327652] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:32:16,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:32:16,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 01:32:16,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024293839] [2022-11-22 01:32:16,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:32:16,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:32:16,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:32:16,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:32:16,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:32:16,792 INFO L87 Difference]: Start difference. First operand 276 states and 379 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:17,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:32:17,202 INFO L93 Difference]: Finished difference Result 485 states and 624 transitions. [2022-11-22 01:32:17,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 01:32:17,218 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-11-22 01:32:17,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:32:17,220 INFO L225 Difference]: With dead ends: 485 [2022-11-22 01:32:17,220 INFO L226 Difference]: Without dead ends: 485 [2022-11-22 01:32:17,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:32:17,221 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 180 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:32:17,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 832 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:32:17,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-11-22 01:32:17,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 313. [2022-11-22 01:32:17,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 242 states have (on average 1.6983471074380165) internal successors, (411), 293 states have internal predecessors, (411), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-22 01:32:17,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 437 transitions. [2022-11-22 01:32:17,236 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 437 transitions. Word has length 16 [2022-11-22 01:32:17,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:32:17,237 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 437 transitions. [2022-11-22 01:32:17,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:17,237 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 437 transitions. [2022-11-22 01:32:17,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-22 01:32:17,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:32:17,239 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:32:17,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-22 01:32:17,239 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:32:17,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:32:17,240 INFO L85 PathProgramCache]: Analyzing trace with hash 2124685205, now seen corresponding path program 1 times [2022-11-22 01:32:17,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:32:17,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864147232] [2022-11-22 01:32:17,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:32:17,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:32:17,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:32:17,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:32:17,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:32:17,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864147232] [2022-11-22 01:32:17,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864147232] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:32:17,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:32:17,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:32:17,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375167690] [2022-11-22 01:32:17,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:32:17,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:32:17,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:32:17,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:32:17,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:32:17,328 INFO L87 Difference]: Start difference. First operand 313 states and 437 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:17,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:32:17,609 INFO L93 Difference]: Finished difference Result 461 states and 610 transitions. [2022-11-22 01:32:17,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:32:17,610 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-11-22 01:32:17,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:32:17,612 INFO L225 Difference]: With dead ends: 461 [2022-11-22 01:32:17,612 INFO L226 Difference]: Without dead ends: 461 [2022-11-22 01:32:17,612 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 [2022-11-22 01:32:17,613 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 181 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:32:17,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 222 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:32:17,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-11-22 01:32:17,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 333. [2022-11-22 01:32:17,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 262 states have (on average 1.7366412213740459) internal successors, (455), 313 states have internal predecessors, (455), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-22 01:32:17,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 481 transitions. [2022-11-22 01:32:17,624 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 481 transitions. Word has length 17 [2022-11-22 01:32:17,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:32:17,624 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 481 transitions. [2022-11-22 01:32:17,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:17,625 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 481 transitions. [2022-11-22 01:32:17,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-22 01:32:17,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:32:17,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:32:17,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-22 01:32:17,626 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:32:17,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:32:17,626 INFO L85 PathProgramCache]: Analyzing trace with hash 2124685206, now seen corresponding path program 1 times [2022-11-22 01:32:17,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:32:17,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757398004] [2022-11-22 01:32:17,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:32:17,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:32:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:32:17,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:32:17,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:32:17,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757398004] [2022-11-22 01:32:17,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757398004] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:32:17,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:32:17,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:32:17,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128755524] [2022-11-22 01:32:17,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:32:17,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:32:17,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:32:17,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:32:17,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:32:17,786 INFO L87 Difference]: Start difference. First operand 333 states and 481 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:18,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:32:18,067 INFO L93 Difference]: Finished difference Result 376 states and 489 transitions. [2022-11-22 01:32:18,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:32:18,071 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-11-22 01:32:18,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:32:18,073 INFO L225 Difference]: With dead ends: 376 [2022-11-22 01:32:18,073 INFO L226 Difference]: Without dead ends: 376 [2022-11-22 01:32:18,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:32:18,074 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 140 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:32:18,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 291 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:32:18,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-11-22 01:32:18,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 333. [2022-11-22 01:32:18,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 262 states have (on average 1.6793893129770991) internal successors, (440), 313 states have internal predecessors, (440), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-22 01:32:18,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 466 transitions. [2022-11-22 01:32:18,084 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 466 transitions. Word has length 17 [2022-11-22 01:32:18,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:32:18,084 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 466 transitions. [2022-11-22 01:32:18,085 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:18,085 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 466 transitions. [2022-11-22 01:32:18,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-22 01:32:18,086 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:32:18,086 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:32:18,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-22 01:32:18,086 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:32:18,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:32:18,087 INFO L85 PathProgramCache]: Analyzing trace with hash 6077746, now seen corresponding path program 1 times [2022-11-22 01:32:18,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:32:18,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273366200] [2022-11-22 01:32:18,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:32:18,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:32:18,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:32:18,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:32:18,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:32:18,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273366200] [2022-11-22 01:32:18,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273366200] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:32:18,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:32:18,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:32:18,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055896267] [2022-11-22 01:32:18,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:32:18,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:32:18,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:32:18,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:32:18,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:32:18,372 INFO L87 Difference]: Start difference. First operand 333 states and 466 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:18,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:32:18,557 INFO L93 Difference]: Finished difference Result 355 states and 459 transitions. [2022-11-22 01:32:18,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:32:18,557 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-11-22 01:32:18,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:32:18,559 INFO L225 Difference]: With dead ends: 355 [2022-11-22 01:32:18,559 INFO L226 Difference]: Without dead ends: 355 [2022-11-22 01:32:18,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:32:18,560 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 342 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:32:18,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 150 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:32:18,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-11-22 01:32:18,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 329. [2022-11-22 01:32:18,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 262 states have (on average 1.6488549618320612) internal successors, (432), 309 states have internal predecessors, (432), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-22 01:32:18,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 458 transitions. [2022-11-22 01:32:18,572 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 458 transitions. Word has length 18 [2022-11-22 01:32:18,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:32:18,572 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 458 transitions. [2022-11-22 01:32:18,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:18,573 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 458 transitions. [2022-11-22 01:32:18,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-22 01:32:18,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:32:18,574 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:32:18,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-22 01:32:18,574 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:32:18,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:32:18,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1564037942, now seen corresponding path program 1 times [2022-11-22 01:32:18,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:32:18,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777650561] [2022-11-22 01:32:18,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:32:18,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:32:18,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:32:18,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:32:18,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:32:18,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777650561] [2022-11-22 01:32:18,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777650561] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:32:18,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:32:18,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 01:32:18,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797840623] [2022-11-22 01:32:18,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:32:18,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:32:18,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:32:18,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:32:18,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:32:18,831 INFO L87 Difference]: Start difference. First operand 329 states and 458 transitions. Second operand has 8 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:19,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:32:19,245 INFO L93 Difference]: Finished difference Result 460 states and 616 transitions. [2022-11-22 01:32:19,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 01:32:19,246 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-11-22 01:32:19,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:32:19,248 INFO L225 Difference]: With dead ends: 460 [2022-11-22 01:32:19,248 INFO L226 Difference]: Without dead ends: 460 [2022-11-22 01:32:19,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-11-22 01:32:19,249 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 356 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:32:19,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 551 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:32:19,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-11-22 01:32:19,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 326. [2022-11-22 01:32:19,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 262 states have (on average 1.6106870229007633) internal successors, (422), 306 states have internal predecessors, (422), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-22 01:32:19,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 448 transitions. [2022-11-22 01:32:19,260 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 448 transitions. Word has length 20 [2022-11-22 01:32:19,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:32:19,260 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 448 transitions. [2022-11-22 01:32:19,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:19,261 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 448 transitions. [2022-11-22 01:32:19,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-22 01:32:19,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:32:19,262 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:32:19,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-22 01:32:19,262 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:32:19,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:32:19,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1240538813, now seen corresponding path program 1 times [2022-11-22 01:32:19,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:32:19,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36218492] [2022-11-22 01:32:19,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:32:19,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:32:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:32:19,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:32:19,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:32:19,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36218492] [2022-11-22 01:32:19,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36218492] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:32:19,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:32:19,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 01:32:19,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831682942] [2022-11-22 01:32:19,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:32:19,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:32:19,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:32:19,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:32:19,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:32:19,671 INFO L87 Difference]: Start difference. First operand 326 states and 448 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:20,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:32:20,006 INFO L93 Difference]: Finished difference Result 359 states and 465 transitions. [2022-11-22 01:32:20,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:32:20,006 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-11-22 01:32:20,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:32:20,008 INFO L225 Difference]: With dead ends: 359 [2022-11-22 01:32:20,008 INFO L226 Difference]: Without dead ends: 359 [2022-11-22 01:32:20,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:32:20,009 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 101 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:32:20,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 438 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:32:20,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-11-22 01:32:20,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 322. [2022-11-22 01:32:20,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 258 states have (on average 1.5891472868217054) internal successors, (410), 302 states have internal predecessors, (410), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-22 01:32:20,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 436 transitions. [2022-11-22 01:32:20,021 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 436 transitions. Word has length 21 [2022-11-22 01:32:20,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:32:20,022 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 436 transitions. [2022-11-22 01:32:20,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:20,022 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 436 transitions. [2022-11-22 01:32:20,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-22 01:32:20,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:32:20,023 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:32:20,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-22 01:32:20,026 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:32:20,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:32:20,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1240513244, now seen corresponding path program 1 times [2022-11-22 01:32:20,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:32:20,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149412435] [2022-11-22 01:32:20,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:32:20,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:32:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:32:20,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:32:20,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:32:20,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149412435] [2022-11-22 01:32:20,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149412435] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:32:20,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:32:20,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:32:20,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102242112] [2022-11-22 01:32:20,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:32:20,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:32:20,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:32:20,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:32:20,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:32:20,175 INFO L87 Difference]: Start difference. First operand 322 states and 436 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:20,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:32:20,389 INFO L93 Difference]: Finished difference Result 358 states and 463 transitions. [2022-11-22 01:32:20,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:32:20,389 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-11-22 01:32:20,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:32:20,391 INFO L225 Difference]: With dead ends: 358 [2022-11-22 01:32:20,391 INFO L226 Difference]: Without dead ends: 358 [2022-11-22 01:32:20,391 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 [2022-11-22 01:32:20,392 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 101 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:32:20,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 356 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:32:20,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-11-22 01:32:20,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 322. [2022-11-22 01:32:20,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 258 states have (on average 1.5813953488372092) internal successors, (408), 302 states have internal predecessors, (408), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-22 01:32:20,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 434 transitions. [2022-11-22 01:32:20,400 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 434 transitions. Word has length 21 [2022-11-22 01:32:20,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:32:20,400 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 434 transitions. [2022-11-22 01:32:20,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:20,401 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 434 transitions. [2022-11-22 01:32:20,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-22 01:32:20,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:32:20,401 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:32:20,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-22 01:32:20,402 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:32:20,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:32:20,402 INFO L85 PathProgramCache]: Analyzing trace with hash -198794891, now seen corresponding path program 1 times [2022-11-22 01:32:20,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:32:20,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691420915] [2022-11-22 01:32:20,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:32:20,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:32:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:32:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:32:20,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:32:20,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691420915] [2022-11-22 01:32:20,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691420915] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:32:20,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:32:20,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:32:20,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333144972] [2022-11-22 01:32:20,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:32:20,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:32:20,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:32:20,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:32:20,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:32:20,622 INFO L87 Difference]: Start difference. First operand 322 states and 434 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:20,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:32:20,888 INFO L93 Difference]: Finished difference Result 402 states and 523 transitions. [2022-11-22 01:32:20,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:32:20,889 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-11-22 01:32:20,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:32:20,891 INFO L225 Difference]: With dead ends: 402 [2022-11-22 01:32:20,891 INFO L226 Difference]: Without dead ends: 402 [2022-11-22 01:32:20,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:32:20,892 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 112 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:32:20,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 306 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:32:20,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-11-22 01:32:20,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 353. [2022-11-22 01:32:20,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 286 states have (on average 1.56993006993007) internal successors, (449), 331 states have internal predecessors, (449), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-22 01:32:20,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 479 transitions. [2022-11-22 01:32:20,904 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 479 transitions. Word has length 22 [2022-11-22 01:32:20,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:32:20,905 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 479 transitions. [2022-11-22 01:32:20,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:20,905 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 479 transitions. [2022-11-22 01:32:20,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-22 01:32:20,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:32:20,906 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:32:20,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-22 01:32:20,907 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:32:20,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:32:20,907 INFO L85 PathProgramCache]: Analyzing trace with hash 544205615, now seen corresponding path program 1 times [2022-11-22 01:32:20,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:32:20,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600809200] [2022-11-22 01:32:20,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:32:20,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:32:20,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:32:21,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:32:21,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:32:21,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600809200] [2022-11-22 01:32:21,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600809200] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:32:21,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192804478] [2022-11-22 01:32:21,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:32:21,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:32:21,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:32:21,373 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:32:21,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:32:21,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:32:21,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-22 01:32:21,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:32:22,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:22,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:22,200 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:32:22,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 123 [2022-11-22 01:32:22,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:22,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:22,235 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:32:22,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 91 [2022-11-22 01:32:22,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:32:22,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:32:23,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192804478] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:32:23,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [595031388] [2022-11-22 01:32:23,263 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-22 01:32:23,263 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:32:23,304 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:32:23,309 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:32:23,310 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:32:23,754 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 15 for LOIs [2022-11-22 01:32:23,756 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:32:25,707 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12991#(and (= |ULTIMATE.start_is_empty_~no_beg~0#1| (ite (and (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_is_empty_~list#1.base|) (+ |ULTIMATE.start_is_empty_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_is_empty_~list#1.base|) (+ |ULTIMATE.start_is_empty_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) 0)) 1 0)) (= |ULTIMATE.start_is_empty_~list#1.base| |ULTIMATE.start_is_empty_#in~list#1.base|) (= |ULTIMATE.start_remove_one_~list#1.offset| |ULTIMATE.start_is_empty_#in~list#1.offset|) (= |ULTIMATE.start_remove_one_#in~list#1.base| |ULTIMATE.start_remove_one_~list#1.base|) (= |ULTIMATE.start_is_empty_~no_end~0#1| (ite (and (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_is_empty_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset|)) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_is_empty_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset|)) 0)) 1 0)) (= 3 |~#list~0.base|) (<= 0 ~i~0) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_main_#t~ret27#1|) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_remove_one_~from#1|) (= |ULTIMATE.start_main_~y~0#1| 0) (= |ULTIMATE.start_remove_one_#in~list#1.base| |~#list~0.base|) (or (< 10 ~i~0) (not (= |ULTIMATE.start_is_empty_~no_end~0#1| |ULTIMATE.start_is_empty_~no_beg~0#1|))) (<= (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset| 4) (select |#length| |ULTIMATE.start_is_empty_~list#1.base|)) (= |~#list~0.offset| |ULTIMATE.start_remove_one_#in~list#1.offset|) (= |ULTIMATE.start_is_empty_~list#1.offset| |ULTIMATE.start_is_empty_#in~list#1.offset|) (= |ULTIMATE.start_is_empty_~list#1.offset| 0) (= |ULTIMATE.start_main_~z~0#1| 0) (= |#NULL.offset| 0) (= |ULTIMATE.start_is_empty_#in~list#1.base| |ULTIMATE.start_remove_one_~list#1.base|) (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_#t~ret27#1|) (= (select |#valid| |ULTIMATE.start_is_empty_~list#1.base|) 1) (= |ULTIMATE.start_remove_one_~list#1.offset| |ULTIMATE.start_remove_one_#in~list#1.offset|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~length~0#1| 0) (not (< |ULTIMATE.start_is_empty_~list#1.base| |#StackHeapBarrier|)) (= |#NULL.base| 0))' at error location [2022-11-22 01:32:25,707 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:32:25,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:32:25,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2022-11-22 01:32:25,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064725154] [2022-11-22 01:32:25,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:32:25,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 01:32:25,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:32:25,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 01:32:25,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2022-11-22 01:32:25,710 INFO L87 Difference]: Start difference. First operand 353 states and 479 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:32:27,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:32:27,878 INFO L93 Difference]: Finished difference Result 739 states and 941 transitions. [2022-11-22 01:32:27,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-22 01:32:27,878 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2022-11-22 01:32:27,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:32:27,882 INFO L225 Difference]: With dead ends: 739 [2022-11-22 01:32:27,882 INFO L226 Difference]: Without dead ends: 735 [2022-11-22 01:32:27,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=291, Invalid=1431, Unknown=0, NotChecked=0, Total=1722 [2022-11-22 01:32:27,885 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 561 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:32:27,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 1051 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 01:32:27,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-11-22 01:32:27,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 453. [2022-11-22 01:32:27,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 374 states have (on average 1.5160427807486632) internal successors, (567), 423 states have internal predecessors, (567), 23 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (23), 17 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-22 01:32:27,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 613 transitions. [2022-11-22 01:32:27,908 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 613 transitions. Word has length 23 [2022-11-22 01:32:27,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:32:27,908 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 613 transitions. [2022-11-22 01:32:27,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:32:27,909 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 613 transitions. [2022-11-22 01:32:27,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-22 01:32:27,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:32:27,909 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:32:27,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 01:32:28,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:32:28,119 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:32:28,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:32:28,120 INFO L85 PathProgramCache]: Analyzing trace with hash -2063322473, now seen corresponding path program 1 times [2022-11-22 01:32:28,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:32:28,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660003551] [2022-11-22 01:32:28,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:32:28,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:32:28,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:32:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:32:28,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:32:28,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660003551] [2022-11-22 01:32:28,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660003551] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:32:28,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:32:28,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 01:32:28,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176538620] [2022-11-22 01:32:28,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:32:28,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:32:28,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:32:28,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:32:28,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:32:28,411 INFO L87 Difference]: Start difference. First operand 453 states and 613 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:29,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:32:29,081 INFO L93 Difference]: Finished difference Result 799 states and 1055 transitions. [2022-11-22 01:32:29,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:32:29,082 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-11-22 01:32:29,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:32:29,085 INFO L225 Difference]: With dead ends: 799 [2022-11-22 01:32:29,085 INFO L226 Difference]: Without dead ends: 799 [2022-11-22 01:32:29,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:32:29,086 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 262 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:32:29,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 443 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 01:32:29,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-11-22 01:32:29,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 499. [2022-11-22 01:32:29,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 414 states have (on average 1.4951690821256038) internal successors, (619), 465 states have internal predecessors, (619), 27 states have call successors, (27), 14 states have call predecessors, (27), 14 states have return successors, (27), 19 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-22 01:32:29,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 673 transitions. [2022-11-22 01:32:29,102 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 673 transitions. Word has length 24 [2022-11-22 01:32:29,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:32:29,103 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 673 transitions. [2022-11-22 01:32:29,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:29,103 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 673 transitions. [2022-11-22 01:32:29,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-22 01:32:29,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:32:29,104 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 01:32:29,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-22 01:32:29,104 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:32:29,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:32:29,105 INFO L85 PathProgramCache]: Analyzing trace with hash 461512992, now seen corresponding path program 1 times [2022-11-22 01:32:29,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:32:29,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117774062] [2022-11-22 01:32:29,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:32:29,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:32:29,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:32:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:32:29,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:32:29,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117774062] [2022-11-22 01:32:29,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117774062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:32:29,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:32:29,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 01:32:29,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450230427] [2022-11-22 01:32:29,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:32:29,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:32:29,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:32:29,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:32:29,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:32:29,355 INFO L87 Difference]: Start difference. First operand 499 states and 673 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:29,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:32:29,766 INFO L93 Difference]: Finished difference Result 629 states and 792 transitions. [2022-11-22 01:32:29,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:32:29,767 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-11-22 01:32:29,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:32:29,769 INFO L225 Difference]: With dead ends: 629 [2022-11-22 01:32:29,769 INFO L226 Difference]: Without dead ends: 629 [2022-11-22 01:32:29,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-22 01:32:29,770 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 394 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:32:29,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 373 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:32:29,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-11-22 01:32:29,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 499. [2022-11-22 01:32:29,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 414 states have (on average 1.4758454106280192) internal successors, (611), 465 states have internal predecessors, (611), 27 states have call successors, (27), 14 states have call predecessors, (27), 14 states have return successors, (27), 19 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-22 01:32:29,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 665 transitions. [2022-11-22 01:32:29,785 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 665 transitions. Word has length 25 [2022-11-22 01:32:29,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:32:29,785 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 665 transitions. [2022-11-22 01:32:29,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:29,786 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 665 transitions. [2022-11-22 01:32:29,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-22 01:32:29,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:32:29,787 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:32:29,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-22 01:32:29,787 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:32:29,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:32:29,788 INFO L85 PathProgramCache]: Analyzing trace with hash 136633119, now seen corresponding path program 1 times [2022-11-22 01:32:29,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:32:29,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407497365] [2022-11-22 01:32:29,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:32:29,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:32:29,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:32:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:32:30,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:32:30,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407497365] [2022-11-22 01:32:30,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407497365] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:32:30,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481705694] [2022-11-22 01:32:30,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:32:30,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:32:30,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:32:30,071 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:32:30,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:32:30,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:32:30,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-22 01:32:30,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:32:30,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:32:30,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:32:30,687 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:32:30,687 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 30 treesize of output 34 [2022-11-22 01:32:30,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:32:30,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481705694] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:32:30,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [627312315] [2022-11-22 01:32:30,883 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-22 01:32:30,884 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:32:30,884 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:32:30,884 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:32:30,885 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:32:31,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:32:31,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 38 [2022-11-22 01:32:31,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,308 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 38 treesize of output 21 [2022-11-22 01:32:31,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:32:31,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,357 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 43 treesize of output 41 [2022-11-22 01:32:31,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:32:31,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,381 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 43 treesize of output 41 [2022-11-22 01:32:31,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-22 01:32:31,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-22 01:32:31,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,535 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 38 treesize of output 21 [2022-11-22 01:32:31,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,603 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 55 [2022-11-22 01:32:31,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,635 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 58 [2022-11-22 01:32:31,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,677 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 28 treesize of output 30 [2022-11-22 01:32:31,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,818 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 58 [2022-11-22 01:32:31,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-11-22 01:32:31,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:31,871 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-22 01:32:32,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:32,468 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 38 treesize of output 21 [2022-11-22 01:32:32,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:32:32,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:32,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:32,495 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 43 treesize of output 41 [2022-11-22 01:32:32,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:32:32,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:32,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:32,517 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 43 treesize of output 41 [2022-11-22 01:32:32,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:32,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:32,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:32,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-22 01:32:32,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:32,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:32,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:32,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-11-22 01:32:32,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:32,638 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 38 treesize of output 21 [2022-11-22 01:32:32,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:32,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:32,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:32,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:32,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:32,712 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 55 [2022-11-22 01:32:32,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:32,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:32,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:32,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:32,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:32,747 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 55 [2022-11-22 01:32:32,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:32,777 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 28 treesize of output 30 [2022-11-22 01:32:32,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:32,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:32,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:32,922 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-22 01:32:32,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:32,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:32,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:32,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-11-22 01:32:32,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:32,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:32,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:33,000 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-22 01:32:33,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:32:33,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:33,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:33,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:33,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:33,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:33,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 38 [2022-11-22 01:32:33,344 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 56 for LOIs [2022-11-22 01:32:33,349 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:32:39,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [627312315] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:32:39,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:32:39,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [7, 7, 8] total 38 [2022-11-22 01:32:39,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192645348] [2022-11-22 01:32:39,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:32:39,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-22 01:32:39,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:32:39,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-22 01:32:39,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1042, Unknown=0, NotChecked=0, Total=1406 [2022-11-22 01:32:39,578 INFO L87 Difference]: Start difference. First operand 499 states and 665 transitions. Second operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 15 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:41,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:32:41,173 INFO L93 Difference]: Finished difference Result 538 states and 707 transitions. [2022-11-22 01:32:41,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-22 01:32:41,175 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 15 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-11-22 01:32:41,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:32:41,178 INFO L225 Difference]: With dead ends: 538 [2022-11-22 01:32:41,178 INFO L226 Difference]: Without dead ends: 538 [2022-11-22 01:32:41,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=364, Invalid=1042, Unknown=0, NotChecked=0, Total=1406 [2022-11-22 01:32:41,179 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 50 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:32:41,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 234 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-22 01:32:41,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-11-22 01:32:41,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 512. [2022-11-22 01:32:41,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 427 states have (on average 1.4613583138173303) internal successors, (624), 477 states have internal predecessors, (624), 27 states have call successors, (27), 14 states have call predecessors, (27), 14 states have return successors, (27), 20 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-22 01:32:41,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 678 transitions. [2022-11-22 01:32:41,192 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 678 transitions. Word has length 29 [2022-11-22 01:32:41,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:32:41,193 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 678 transitions. [2022-11-22 01:32:41,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 15 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:32:41,193 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 678 transitions. [2022-11-22 01:32:41,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-22 01:32:41,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:32:41,194 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:32:41,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 01:32:41,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-22 01:32:41,400 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:32:41,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:32:41,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1938966803, now seen corresponding path program 1 times [2022-11-22 01:32:41,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:32:41,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119786170] [2022-11-22 01:32:41,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:32:41,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:32:41,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:32:41,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:32:41,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:32:41,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119786170] [2022-11-22 01:32:41,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119786170] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:32:41,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967537969] [2022-11-22 01:32:41,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:32:41,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:32:41,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:32:41,718 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:32:41,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:32:41,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:32:41,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-22 01:32:41,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:32:42,151 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:32:42,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:32:42,298 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:32:42,298 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 30 treesize of output 34 [2022-11-22 01:32:42,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:32:42,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967537969] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:32:42,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2124096125] [2022-11-22 01:32:42,499 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-22 01:32:42,499 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:32:42,500 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:32:42,500 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:32:42,500 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:32:42,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:32:42,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:42,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:42,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:42,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:42,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:42,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 38 [2022-11-22 01:32:42,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:32:42,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:42,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:42,785 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 43 treesize of output 41 [2022-11-22 01:32:42,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:42,821 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 38 treesize of output 21 [2022-11-22 01:32:42,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:32:42,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:42,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:42,849 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 43 treesize of output 41 [2022-11-22 01:32:42,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:42,915 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 38 treesize of output 21 [2022-11-22 01:32:42,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:42,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:42,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:42,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-11-22 01:32:42,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:42,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:42,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:42,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-11-22 01:32:43,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:43,066 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 28 treesize of output 30 [2022-11-22 01:32:43,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:43,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:43,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:43,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:43,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:43,102 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 55 [2022-11-22 01:32:43,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:43,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:43,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:43,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:43,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:43,134 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 55 [2022-11-22 01:32:43,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:43,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:43,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:43,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-11-22 01:32:43,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:43,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:43,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:43,320 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-22 01:32:43,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:43,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:43,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:43,357 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-22 01:32:43,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:43,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:43,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:43,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-11-22 01:32:43,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:43,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:43,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:32:43,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:43,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:43,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:32:43,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 72 [2022-11-22 01:32:43,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:43,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:43,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:32:43,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:43,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:43,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:32:43,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 64 [2022-11-22 01:32:43,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:43,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:43,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:43,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:32:43,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:32:43,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 36 [2022-11-22 01:32:44,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:44,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:44,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:44,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:32:44,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:32:44,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 36 [2022-11-22 01:32:44,138 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:32:44,138 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 [2022-11-22 01:32:44,160 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 17 treesize of output 19 [2022-11-22 01:32:44,250 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 11 [2022-11-22 01:32:44,259 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 11 [2022-11-22 01:32:44,273 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 23 treesize of output 1 [2022-11-22 01:32:44,312 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-22 01:32:44,312 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 34 [2022-11-22 01:32:44,326 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 23 treesize of output 1 [2022-11-22 01:32:44,354 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-22 01:32:44,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 34 [2022-11-22 01:32:44,427 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-22 01:32:44,427 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 3 case distinctions, treesize of input 50 treesize of output 61 [2022-11-22 01:32:44,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 01:32:44,518 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-22 01:32:44,519 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 3 case distinctions, treesize of input 50 treesize of output 61 [2022-11-22 01:32:44,710 INFO L321 Elim1Store]: treesize reduction 56, result has 54.5 percent of original size [2022-11-22 01:32:44,711 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 3 case distinctions, treesize of input 79 treesize of output 117 [2022-11-22 01:32:44,872 INFO L321 Elim1Store]: treesize reduction 56, result has 54.5 percent of original size [2022-11-22 01:32:44,872 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 3 case distinctions, treesize of input 79 treesize of output 117 [2022-11-22 01:32:44,997 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:32:44,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2022-11-22 01:32:51,433 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 27 treesize of output 15 [2022-11-22 01:32:51,447 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 23 treesize of output 1 [2022-11-22 01:32:51,690 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 27 treesize of output 15 [2022-11-22 01:32:55,420 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:32:55,421 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 17 treesize of output 23 [2022-11-22 01:32:55,453 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:32:55,453 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 [2022-11-22 01:32:55,541 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 23 treesize of output 1 [2022-11-22 01:32:55,551 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 11 [2022-11-22 01:32:55,561 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 11 [2022-11-22 01:32:55,587 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 23 treesize of output 1 [2022-11-22 01:32:55,612 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-22 01:32:55,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 34 [2022-11-22 01:32:55,641 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-22 01:32:55,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 34 [2022-11-22 01:32:55,706 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-22 01:32:55,706 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 3 case distinctions, treesize of input 50 treesize of output 61 [2022-11-22 01:32:55,774 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-22 01:32:55,774 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 3 case distinctions, treesize of input 50 treesize of output 61 [2022-11-22 01:32:55,800 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 [2022-11-22 01:32:56,003 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 11 [2022-11-22 01:32:56,016 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 23 treesize of output 1 [2022-11-22 01:32:56,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 01:32:56,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-22 01:32:56,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:56,492 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-22 01:32:56,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-22 01:32:56,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:32:56,538 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-22 01:32:56,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-22 01:32:56,899 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:32:56,899 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 17 treesize of output 23 [2022-11-22 01:32:56,931 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:32:56,932 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 [2022-11-22 01:32:57,016 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 69 for LOIs [2022-11-22 01:32:57,024 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:33:03,962 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18131#(and (<= |~#list~0.base| 3) (= |~#list~0.offset| |ULTIMATE.start_append_one_#in~list#1.offset|) (<= 0 |#NULL.base|) (<= ~i~0 0) (<= |ULTIMATE.start_main_~z~0#1| 0) (or (not (<= (+ (* 4 |ULTIMATE.start_append_one_~to#1|) |ULTIMATE.start_append_one_~list#1.offset| 4) (select |#length| |ULTIMATE.start_append_one_~list#1.base|))) (not (<= 0 (+ (* 4 |ULTIMATE.start_append_one_~to#1|) |ULTIMATE.start_append_one_~list#1.offset|)))) (<= |ULTIMATE.start_main_~y~0#1| 5) (<= |ULTIMATE.start_main_#t~ret22#1| 2147483647) (<= 0 ~i~0) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start_append_one_~list#1.offset| |ULTIMATE.start_append_one_#in~list#1.offset|) (= |ULTIMATE.start_append_one_#in~list#1.base| |ULTIMATE.start_append_one_~list#1.base|) (<= 0 |ULTIMATE.start_main_~length~0#1|) (= |ULTIMATE.start_append_one_#in~to#1| |ULTIMATE.start_append_one_~to#1|) (<= 0 (+ |ULTIMATE.start_main_#t~ret22#1| 2147483648)) (<= |#NULL.base| 0) (= |ULTIMATE.start_append_one_#in~list#1.base| |~#list~0.base|) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (= |ULTIMATE.start_append_one_#in~to#1| |ULTIMATE.start_main_#t~ret22#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |~#list~0.offset| 0) (<= 0 |ULTIMATE.start_main_~z~0#1|))' at error location [2022-11-22 01:33:03,962 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:33:03,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:33:03,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 22 [2022-11-22 01:33:03,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970302294] [2022-11-22 01:33:03,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:33:03,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-22 01:33:03,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:33:03,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-22 01:33:03,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=1664, Unknown=0, NotChecked=0, Total=2070 [2022-11-22 01:33:03,966 INFO L87 Difference]: Start difference. First operand 512 states and 678 transitions. Second operand has 23 states, 19 states have (on average 4.052631578947368) internal successors, (77), 20 states have internal predecessors, (77), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-22 01:33:04,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:33:04,452 INFO L93 Difference]: Finished difference Result 533 states and 675 transitions. [2022-11-22 01:33:04,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:33:04,453 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 4.052631578947368) internal successors, (77), 20 states have internal predecessors, (77), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 30 [2022-11-22 01:33:04,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:33:04,455 INFO L225 Difference]: With dead ends: 533 [2022-11-22 01:33:04,455 INFO L226 Difference]: Without dead ends: 533 [2022-11-22 01:33:04,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=444, Invalid=1812, Unknown=0, NotChecked=0, Total=2256 [2022-11-22 01:33:04,457 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 945 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 947 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:33:04,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [947 Valid, 646 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:33:04,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-11-22 01:33:04,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 498. [2022-11-22 01:33:04,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 415 states have (on average 1.453012048192771) internal successors, (603), 464 states have internal predecessors, (603), 27 states have call successors, (27), 14 states have call predecessors, (27), 14 states have return successors, (27), 19 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-22 01:33:04,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 657 transitions. [2022-11-22 01:33:04,469 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 657 transitions. Word has length 30 [2022-11-22 01:33:04,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:33:04,469 INFO L495 AbstractCegarLoop]: Abstraction has 498 states and 657 transitions. [2022-11-22 01:33:04,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 4.052631578947368) internal successors, (77), 20 states have internal predecessors, (77), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-22 01:33:04,470 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 657 transitions. [2022-11-22 01:33:04,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-22 01:33:04,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:33:04,471 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2022-11-22 01:33:04,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 01:33:04,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-22 01:33:04,677 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:33:04,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:33:04,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1085149533, now seen corresponding path program 1 times [2022-11-22 01:33:04,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:33:04,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555753590] [2022-11-22 01:33:04,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:33:04,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:33:04,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:33:04,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:33:04,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:33:04,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555753590] [2022-11-22 01:33:04,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555753590] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:33:04,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:33:04,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 01:33:04,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742449702] [2022-11-22 01:33:04,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:33:04,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:33:04,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:33:04,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:33:04,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:33:04,957 INFO L87 Difference]: Start difference. First operand 498 states and 657 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:33:05,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:33:05,238 INFO L93 Difference]: Finished difference Result 599 states and 759 transitions. [2022-11-22 01:33:05,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:33:05,239 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2022-11-22 01:33:05,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:33:05,241 INFO L225 Difference]: With dead ends: 599 [2022-11-22 01:33:05,241 INFO L226 Difference]: Without dead ends: 599 [2022-11-22 01:33:05,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:33:05,242 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 359 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:33:05,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 189 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:33:05,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-11-22 01:33:05,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 496. [2022-11-22 01:33:05,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 415 states have (on average 1.4433734939759035) internal successors, (599), 462 states have internal predecessors, (599), 27 states have call successors, (27), 14 states have call predecessors, (27), 14 states have return successors, (27), 19 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-22 01:33:05,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 653 transitions. [2022-11-22 01:33:05,254 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 653 transitions. Word has length 32 [2022-11-22 01:33:05,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:33:05,254 INFO L495 AbstractCegarLoop]: Abstraction has 496 states and 653 transitions. [2022-11-22 01:33:05,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:33:05,254 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 653 transitions. [2022-11-22 01:33:05,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-22 01:33:05,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:33:05,255 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2022-11-22 01:33:05,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-22 01:33:05,256 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:33:05,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:33:05,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1184501238, now seen corresponding path program 1 times [2022-11-22 01:33:05,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:33:05,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570822945] [2022-11-22 01:33:05,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:33:05,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:33:05,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:33:05,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:33:05,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:33:05,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570822945] [2022-11-22 01:33:05,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570822945] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:33:05,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:33:05,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 01:33:05,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223781611] [2022-11-22 01:33:05,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:33:05,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:33:05,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:33:05,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:33:05,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:33:05,611 INFO L87 Difference]: Start difference. First operand 496 states and 653 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:33:05,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:33:05,860 INFO L93 Difference]: Finished difference Result 519 states and 653 transitions. [2022-11-22 01:33:05,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:33:05,861 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-11-22 01:33:05,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:33:05,863 INFO L225 Difference]: With dead ends: 519 [2022-11-22 01:33:05,863 INFO L226 Difference]: Without dead ends: 519 [2022-11-22 01:33:05,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:33:05,863 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 422 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:33:05,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 237 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:33:05,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-11-22 01:33:05,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 495. [2022-11-22 01:33:05,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 415 states have (on average 1.4385542168674699) internal successors, (597), 461 states have internal predecessors, (597), 27 states have call successors, (27), 14 states have call predecessors, (27), 14 states have return successors, (27), 19 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-22 01:33:05,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 651 transitions. [2022-11-22 01:33:05,875 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 651 transitions. Word has length 32 [2022-11-22 01:33:05,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:33:05,875 INFO L495 AbstractCegarLoop]: Abstraction has 495 states and 651 transitions. [2022-11-22 01:33:05,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:33:05,876 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 651 transitions. [2022-11-22 01:33:05,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-22 01:33:05,877 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:33:05,877 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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] [2022-11-22 01:33:05,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-22 01:33:05,877 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:33:05,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:33:05,878 INFO L85 PathProgramCache]: Analyzing trace with hash -9535657, now seen corresponding path program 1 times [2022-11-22 01:33:05,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:33:05,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127850790] [2022-11-22 01:33:05,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:33:05,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:33:05,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:33:05,985 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:33:05,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:33:05,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127850790] [2022-11-22 01:33:05,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127850790] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:33:05,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273985344] [2022-11-22 01:33:05,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:33:05,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:33:05,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:33:05,987 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:33:06,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 01:33:06,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:33:06,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 01:33:06,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:33:06,241 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:33:06,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:33:06,272 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-22 01:33:06,273 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 12 treesize of output 11 [2022-11-22 01:33:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:33:06,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273985344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:33:06,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1824332072] [2022-11-22 01:33:06,305 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-22 01:33:06,305 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:33:06,306 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:33:06,306 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:33:06,306 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:33:07,048 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 56 for LOIs [2022-11-22 01:33:07,052 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:33:09,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1824332072] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:33:09,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:33:09,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 5, 5] total 23 [2022-11-22 01:33:09,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092680623] [2022-11-22 01:33:09,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:33:09,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 01:33:09,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:33:09,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 01:33:09,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-11-22 01:33:09,533 INFO L87 Difference]: Start difference. First operand 495 states and 651 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:33:11,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:33:11,018 INFO L93 Difference]: Finished difference Result 513 states and 671 transitions. [2022-11-22 01:33:11,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 01:33:11,018 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-11-22 01:33:11,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:33:11,021 INFO L225 Difference]: With dead ends: 513 [2022-11-22 01:33:11,021 INFO L226 Difference]: Without dead ends: 513 [2022-11-22 01:33:11,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-11-22 01:33:11,022 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 38 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:33:11,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 284 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-22 01:33:11,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-11-22 01:33:11,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 504. [2022-11-22 01:33:11,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 423 states have (on average 1.4326241134751774) internal successors, (606), 469 states have internal predecessors, (606), 28 states have call successors, (28), 14 states have call predecessors, (28), 14 states have return successors, (28), 20 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-22 01:33:11,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 662 transitions. [2022-11-22 01:33:11,035 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 662 transitions. Word has length 34 [2022-11-22 01:33:11,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:33:11,035 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 662 transitions. [2022-11-22 01:33:11,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:33:11,036 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 662 transitions. [2022-11-22 01:33:11,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-22 01:33:11,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:33:11,037 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2022-11-22 01:33:11,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 01:33:11,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-22 01:33:11,244 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:33:11,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:33:11,244 INFO L85 PathProgramCache]: Analyzing trace with hash -139305668, now seen corresponding path program 1 times [2022-11-22 01:33:11,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:33:11,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799708333] [2022-11-22 01:33:11,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:33:11,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:33:11,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:33:11,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:33:11,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:33:11,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799708333] [2022-11-22 01:33:11,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799708333] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:33:11,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88979768] [2022-11-22 01:33:11,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:33:11,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:33:11,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:33:11,335 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:33:11,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 01:33:11,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:33:11,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:33:11,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:33:11,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:33:11,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:33:11,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88979768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:33:11,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:33:11,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-11-22 01:33:11,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881551804] [2022-11-22 01:33:11,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:33:11,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:33:11,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:33:11,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:33:11,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:33:11,532 INFO L87 Difference]: Start difference. First operand 504 states and 662 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:33:11,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:33:11,609 INFO L93 Difference]: Finished difference Result 639 states and 830 transitions. [2022-11-22 01:33:11,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:33:11,609 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-11-22 01:33:11,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:33:11,612 INFO L225 Difference]: With dead ends: 639 [2022-11-22 01:33:11,612 INFO L226 Difference]: Without dead ends: 639 [2022-11-22 01:33:11,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:33:11,613 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 175 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:33:11,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 253 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:33:11,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-11-22 01:33:11,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 523. [2022-11-22 01:33:11,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 442 states have (on average 1.4298642533936652) internal successors, (632), 488 states have internal predecessors, (632), 28 states have call successors, (28), 14 states have call predecessors, (28), 14 states have return successors, (28), 20 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-22 01:33:11,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 688 transitions. [2022-11-22 01:33:11,630 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 688 transitions. Word has length 34 [2022-11-22 01:33:11,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:33:11,631 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 688 transitions. [2022-11-22 01:33:11,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:33:11,631 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 688 transitions. [2022-11-22 01:33:11,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-22 01:33:11,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:33:11,632 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2022-11-22 01:33:11,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 01:33:11,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:33:11,838 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:33:11,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:33:11,839 INFO L85 PathProgramCache]: Analyzing trace with hash -139306953, now seen corresponding path program 1 times [2022-11-22 01:33:11,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:33:11,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344283182] [2022-11-22 01:33:11,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:33:11,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:33:11,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:33:12,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:33:12,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:33:12,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344283182] [2022-11-22 01:33:12,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344283182] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:33:12,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:33:12,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-22 01:33:12,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879039736] [2022-11-22 01:33:12,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:33:12,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 01:33:12,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:33:12,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 01:33:12,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-22 01:33:12,903 INFO L87 Difference]: Start difference. First operand 523 states and 688 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:33:14,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:33:14,163 INFO L93 Difference]: Finished difference Result 740 states and 920 transitions. [2022-11-22 01:33:14,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-22 01:33:14,164 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-11-22 01:33:14,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:33:14,167 INFO L225 Difference]: With dead ends: 740 [2022-11-22 01:33:14,167 INFO L226 Difference]: Without dead ends: 740 [2022-11-22 01:33:14,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2022-11-22 01:33:14,168 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 976 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:33:14,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [980 Valid, 750 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 01:33:14,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-11-22 01:33:14,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 585. [2022-11-22 01:33:14,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 499 states have (on average 1.4228456913827656) internal successors, (710), 546 states have internal predecessors, (710), 32 states have call successors, (32), 16 states have call predecessors, (32), 16 states have return successors, (32), 22 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-22 01:33:14,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 774 transitions. [2022-11-22 01:33:14,184 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 774 transitions. Word has length 34 [2022-11-22 01:33:14,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:33:14,185 INFO L495 AbstractCegarLoop]: Abstraction has 585 states and 774 transitions. [2022-11-22 01:33:14,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:33:14,185 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 774 transitions. [2022-11-22 01:33:14,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-22 01:33:14,186 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:33:14,186 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2022-11-22 01:33:14,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-22 01:33:14,187 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:33:14,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:33:14,187 INFO L85 PathProgramCache]: Analyzing trace with hash -139306952, now seen corresponding path program 1 times [2022-11-22 01:33:14,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:33:14,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756457644] [2022-11-22 01:33:14,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:33:14,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:33:14,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:33:16,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:33:16,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:33:16,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756457644] [2022-11-22 01:33:16,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756457644] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:33:16,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:33:16,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-22 01:33:16,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389976720] [2022-11-22 01:33:16,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:33:16,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-22 01:33:16,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:33:16,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-22 01:33:16,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-11-22 01:33:16,520 INFO L87 Difference]: Start difference. First operand 585 states and 774 transitions. Second operand has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:33:19,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:33:19,231 INFO L93 Difference]: Finished difference Result 908 states and 1154 transitions. [2022-11-22 01:33:19,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-22 01:33:19,232 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-11-22 01:33:19,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:33:19,236 INFO L225 Difference]: With dead ends: 908 [2022-11-22 01:33:19,236 INFO L226 Difference]: Without dead ends: 908 [2022-11-22 01:33:19,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=317, Invalid=943, Unknown=0, NotChecked=0, Total=1260 [2022-11-22 01:33:19,237 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 1144 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1146 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:33:19,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1146 Valid, 914 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-22 01:33:19,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2022-11-22 01:33:19,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 787. [2022-11-22 01:33:19,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 689 states have (on average 1.4600870827285921) internal successors, (1006), 737 states have internal predecessors, (1006), 40 states have call successors, (40), 20 states have call predecessors, (40), 20 states have return successors, (40), 29 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-22 01:33:19,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1086 transitions. [2022-11-22 01:33:19,258 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1086 transitions. Word has length 34 [2022-11-22 01:33:19,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:33:19,259 INFO L495 AbstractCegarLoop]: Abstraction has 787 states and 1086 transitions. [2022-11-22 01:33:19,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:33:19,259 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1086 transitions. [2022-11-22 01:33:19,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-22 01:33:19,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:33:19,260 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2022-11-22 01:33:19,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-22 01:33:19,261 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:33:19,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:33:19,261 INFO L85 PathProgramCache]: Analyzing trace with hash 533639021, now seen corresponding path program 1 times [2022-11-22 01:33:19,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:33:19,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961379997] [2022-11-22 01:33:19,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:33:19,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:33:19,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:33:19,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:33:19,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:33:19,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961379997] [2022-11-22 01:33:19,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961379997] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:33:19,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854054223] [2022-11-22 01:33:19,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:33:19,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:33:19,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:33:19,582 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:33:19,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 01:33:19,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:33:19,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 01:33:19,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:33:19,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:33:19,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:33:19,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854054223] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:33:19,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:33:19,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2022-11-22 01:33:19,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929207569] [2022-11-22 01:33:19,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:33:19,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:33:19,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:33:19,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:33:19,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-22 01:33:19,800 INFO L87 Difference]: Start difference. First operand 787 states and 1086 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 01:33:19,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:33:19,898 INFO L93 Difference]: Finished difference Result 912 states and 1243 transitions. [2022-11-22 01:33:19,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:33:19,899 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2022-11-22 01:33:19,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:33:19,902 INFO L225 Difference]: With dead ends: 912 [2022-11-22 01:33:19,902 INFO L226 Difference]: Without dead ends: 912 [2022-11-22 01:33:19,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-11-22 01:33:19,903 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 290 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:33:19,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 164 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:33:19,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2022-11-22 01:33:19,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 786. [2022-11-22 01:33:19,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 689 states have (on average 1.4528301886792452) internal successors, (1001), 736 states have internal predecessors, (1001), 40 states have call successors, (40), 20 states have call predecessors, (40), 20 states have return successors, (40), 29 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-22 01:33:19,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1081 transitions. [2022-11-22 01:33:19,921 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1081 transitions. Word has length 35 [2022-11-22 01:33:19,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:33:19,922 INFO L495 AbstractCegarLoop]: Abstraction has 786 states and 1081 transitions. [2022-11-22 01:33:19,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 01:33:19,922 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1081 transitions. [2022-11-22 01:33:19,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-22 01:33:19,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:33:19,923 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:33:19,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 01:33:20,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-22 01:33:20,129 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:33:20,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:33:20,129 INFO L85 PathProgramCache]: Analyzing trace with hash -637059353, now seen corresponding path program 1 times [2022-11-22 01:33:20,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:33:20,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605185555] [2022-11-22 01:33:20,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:33:20,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:33:20,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:33:22,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:33:22,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:33:22,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605185555] [2022-11-22 01:33:22,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605185555] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:33:22,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140800836] [2022-11-22 01:33:22,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:33:22,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:33:22,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:33:22,384 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:33:22,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 01:33:22,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:33:22,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-22 01:33:22,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:33:22,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:22,974 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 35 treesize of output 34 [2022-11-22 01:33:22,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:22,983 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 35 treesize of output 34 [2022-11-22 01:33:23,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:23,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:23,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:23,329 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:33:23,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 144 treesize of output 130 [2022-11-22 01:33:23,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:23,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:23,344 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:33:23,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 96 treesize of output 66 [2022-11-22 01:33:23,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:33:23,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:33:24,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:24,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:24,905 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:33:24,906 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 247 treesize of output 243 [2022-11-22 01:33:24,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:24,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:24,938 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:33:24,938 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 207 treesize of output 191 [2022-11-22 01:33:25,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:33:25,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140800836] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:33:25,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1747402116] [2022-11-22 01:33:25,688 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-22 01:33:25,688 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:33:25,689 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:33:25,689 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:33:25,689 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:33:25,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:25,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:25,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:25,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:25,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:25,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:25,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 38 [2022-11-22 01:33:25,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:25,984 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 38 treesize of output 21 [2022-11-22 01:33:26,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:26,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,010 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 43 treesize of output 41 [2022-11-22 01:33:26,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:26,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,033 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 43 treesize of output 41 [2022-11-22 01:33:26,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-11-22 01:33:26,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-22 01:33:26,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,143 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 38 treesize of output 21 [2022-11-22 01:33:26,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,191 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 55 [2022-11-22 01:33:26,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,221 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 28 treesize of output 30 [2022-11-22 01:33:26,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,268 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 55 [2022-11-22 01:33:26,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,372 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-22 01:33:26,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-11-22 01:33:26,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,436 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 58 [2022-11-22 01:33:26,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:26,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:26,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 72 [2022-11-22 01:33:26,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:26,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:26,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 72 [2022-11-22 01:33:26,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-11-22 01:33:26,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:26,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:26,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 36 [2022-11-22 01:33:26,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:26,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:27,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:27,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 36 [2022-11-22 01:33:27,120 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:33:27,120 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 17 treesize of output 23 [2022-11-22 01:33:27,148 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:33:27,148 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 [2022-11-22 01:33:27,236 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 27 treesize of output 26 [2022-11-22 01:33:27,256 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 27 treesize of output 26 [2022-11-22 01:33:27,270 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 23 treesize of output 1 [2022-11-22 01:33:27,319 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-22 01:33:27,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 48 [2022-11-22 01:33:27,336 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 23 treesize of output 1 [2022-11-22 01:33:27,376 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-22 01:33:27,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 48 [2022-11-22 01:33:27,429 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 13 treesize of output 9 [2022-11-22 01:33:27,489 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-22 01:33:27,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 75 [2022-11-22 01:33:27,579 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-22 01:33:27,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 75 [2022-11-22 01:33:28,242 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 23 treesize of output 1 [2022-11-22 01:33:28,256 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 11 [2022-11-22 01:33:28,269 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 11 [2022-11-22 01:33:28,492 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 27 treesize of output 15 [2022-11-22 01:33:28,507 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 27 treesize of output 15 [2022-11-22 01:33:28,520 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 23 treesize of output 1 [2022-11-22 01:33:28,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:28,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:28,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-22 01:33:28,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:28,784 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:33:28,785 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 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 21 [2022-11-22 01:33:28,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:28,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:28,901 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 49 treesize of output 43 [2022-11-22 01:33:28,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:28,935 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 27 treesize of output 26 [2022-11-22 01:33:28,947 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 23 treesize of output 1 [2022-11-22 01:33:28,993 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 23 treesize of output 1 [2022-11-22 01:33:29,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:29,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:29,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:29,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:29,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 57 [2022-11-22 01:33:29,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:29,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:29,059 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-22 01:33:29,060 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 2 case distinctions, treesize of input 38 treesize of output 44 [2022-11-22 01:33:29,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:29,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:29,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:29,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:29,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:29,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:29,125 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 01:33:29,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 47 [2022-11-22 01:33:29,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:29,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:29,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:29,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:29,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:29,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:29,171 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 60 [2022-11-22 01:33:29,195 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 [2022-11-22 01:33:29,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:29,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:29,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:29,400 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-22 01:33:29,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 54 [2022-11-22 01:33:29,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:29,422 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 33 treesize of output 13 [2022-11-22 01:33:29,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:29,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:33:29,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:29,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:33:29,449 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 60 [2022-11-22 01:33:29,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-22 01:33:29,629 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 27 treesize of output 15 [2022-11-22 01:33:29,646 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 23 treesize of output 1 [2022-11-22 01:33:30,364 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:33:30,365 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 [2022-11-22 01:33:30,377 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 17 treesize of output 19 [2022-11-22 01:33:30,461 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 27 treesize of output 26 [2022-11-22 01:33:30,475 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 23 treesize of output 1 [2022-11-22 01:33:30,495 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 27 treesize of output 26 [2022-11-22 01:33:30,530 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 23 treesize of output 1 [2022-11-22 01:33:30,558 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-22 01:33:30,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 48 [2022-11-22 01:33:30,602 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-22 01:33:30,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 48 [2022-11-22 01:33:30,677 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 01:33:30,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 01:33:30,695 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 [2022-11-22 01:33:30,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 01:33:30,774 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:33:30,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2022-11-22 01:33:30,793 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 11 [2022-11-22 01:33:30,945 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 20 for LOIs [2022-11-22 01:33:30,948 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:33:39,482 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29011#(and (<= |~#list~0.base| 3) (<= 0 |#NULL.base|) (= |ULTIMATE.start_is_empty_~no_beg~0#1| (ite (and (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_is_empty_~list#1.base|) (+ |ULTIMATE.start_is_empty_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_is_empty_~list#1.base|) (+ |ULTIMATE.start_is_empty_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) 0)) 1 0)) (= |ULTIMATE.start_is_empty_~list#1.base| |ULTIMATE.start_is_empty_#in~list#1.base|) (<= ~i~0 0) (<= |ULTIMATE.start_main_~z~0#1| 0) (= |ULTIMATE.start_remove_one_#in~list#1.base| |ULTIMATE.start_remove_one_~list#1.base|) (= |ULTIMATE.start_is_empty_~no_end~0#1| (ite (and (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_is_empty_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset|)) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_is_empty_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset|)) 0)) 1 0)) (<= 0 ~i~0) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_main_#t~ret27#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_remove_one_~from#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start_remove_one_#in~list#1.base| |~#list~0.base|) (<= 0 |ULTIMATE.start_main_~length~0#1|) (<= (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset| 4) (select |#length| |ULTIMATE.start_is_empty_~list#1.base|)) (<= |#NULL.base| 0) (= |~#list~0.offset| |ULTIMATE.start_remove_one_#in~list#1.offset|) (= |ULTIMATE.start_is_empty_~list#1.offset| |ULTIMATE.start_is_empty_#in~list#1.offset|) (= |ULTIMATE.start_is_empty_~list#1.offset| 0) (<= 0 |~#list~0.offset|) (= |ULTIMATE.start_is_empty_#in~list#1.base| |ULTIMATE.start_remove_one_~list#1.base|) (<= 3 |~#list~0.base|) (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_#t~ret27#1|) (= (select |#valid| |ULTIMATE.start_is_empty_~list#1.base|) 1) (<= 0 |#NULL.offset|) (not (= |ULTIMATE.start_is_empty_~no_end~0#1| |ULTIMATE.start_is_empty_~no_beg~0#1|)) (= |ULTIMATE.start_remove_one_~list#1.offset| |ULTIMATE.start_remove_one_#in~list#1.offset|) (<= 0 |#StackHeapBarrier|) (not (< |ULTIMATE.start_is_empty_~list#1.base| |#StackHeapBarrier|)) (<= |~#list~0.offset| 0) (<= 0 |ULTIMATE.start_main_~z~0#1|))' at error location [2022-11-22 01:33:39,483 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:33:39,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:33:39,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 14] total 39 [2022-11-22 01:33:39,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566563997] [2022-11-22 01:33:39,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:33:39,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-22 01:33:39,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:33:39,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-22 01:33:39,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=4040, Unknown=0, NotChecked=0, Total=4422 [2022-11-22 01:33:39,485 INFO L87 Difference]: Start difference. First operand 786 states and 1081 transitions. Second operand has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 39 states have internal predecessors, (90), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-22 01:33:58,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:33:58,606 INFO L93 Difference]: Finished difference Result 2702 states and 3563 transitions. [2022-11-22 01:33:58,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-22 01:33:58,607 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 39 states have internal predecessors, (90), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2022-11-22 01:33:58,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:33:58,616 INFO L225 Difference]: With dead ends: 2702 [2022-11-22 01:33:58,616 INFO L226 Difference]: Without dead ends: 2695 [2022-11-22 01:33:58,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5940 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=2107, Invalid=16525, Unknown=0, NotChecked=0, Total=18632 [2022-11-22 01:33:58,621 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 4262 mSDsluCounter, 4976 mSDsCounter, 0 mSdLazyCounter, 5281 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4263 SdHoareTripleChecker+Valid, 5153 SdHoareTripleChecker+Invalid, 5620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 5281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:33:58,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4263 Valid, 5153 Invalid, 5620 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [339 Valid, 5281 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-11-22 01:33:58,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2022-11-22 01:33:58,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 1496. [2022-11-22 01:33:58,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1343 states have (on average 1.5271779597915116) internal successors, (2051), 1396 states have internal predecessors, (2051), 75 states have call successors, (75), 41 states have call predecessors, (75), 41 states have return successors, (75), 58 states have call predecessors, (75), 75 states have call successors, (75) [2022-11-22 01:33:58,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 2201 transitions. [2022-11-22 01:33:58,669 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 2201 transitions. Word has length 36 [2022-11-22 01:33:58,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:33:58,669 INFO L495 AbstractCegarLoop]: Abstraction has 1496 states and 2201 transitions. [2022-11-22 01:33:58,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 39 states have internal predecessors, (90), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-22 01:33:58,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 2201 transitions. [2022-11-22 01:33:58,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-22 01:33:58,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:33:58,670 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:33:58,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 01:33:58,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-22 01:33:58,877 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:33:58,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:33:58,877 INFO L85 PathProgramCache]: Analyzing trace with hash -93290116, now seen corresponding path program 1 times [2022-11-22 01:33:58,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:33:58,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997081703] [2022-11-22 01:33:58,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:33:58,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:33:58,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:34:00,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:34:00,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:34:00,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997081703] [2022-11-22 01:34:00,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997081703] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:34:00,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057841442] [2022-11-22 01:34:00,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:34:00,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:34:00,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:34:00,761 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:34:00,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 01:34:00,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:34:00,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-22 01:34:00,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:34:01,081 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 [2022-11-22 01:34:01,268 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 11 [2022-11-22 01:34:01,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:01,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-22 01:34:01,569 INFO L321 Elim1Store]: treesize reduction 36, result has 37.9 percent of original size [2022-11-22 01:34:01,570 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 23 treesize of output 33 [2022-11-22 01:34:01,577 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 21 treesize of output 9 [2022-11-22 01:34:01,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:34:01,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:34:01,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057841442] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:34:01,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [527261114] [2022-11-22 01:34:01,764 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-22 01:34:01,764 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:34:01,764 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:34:01,764 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:34:01,765 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:34:01,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:34:01,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:01,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:01,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:01,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:01,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:01,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 38 [2022-11-22 01:34:01,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:34:01,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:01,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:01,995 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 43 treesize of output 41 [2022-11-22 01:34:02,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:34:02,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,017 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 43 treesize of output 41 [2022-11-22 01:34:02,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,044 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 38 treesize of output 21 [2022-11-22 01:34:02,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,090 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 38 treesize of output 21 [2022-11-22 01:34:02,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-11-22 01:34:02,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-11-22 01:34:02,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,207 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 55 [2022-11-22 01:34:02,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,227 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 28 treesize of output 30 [2022-11-22 01:34:02,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,255 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 55 [2022-11-22 01:34:02,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,410 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 58 [2022-11-22 01:34:02,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,436 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-22 01:34:02,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-11-22 01:34:02,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:34:02,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:34:02,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 72 [2022-11-22 01:34:02,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:34:02,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:34:02,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 72 [2022-11-22 01:34:02,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-11-22 01:34:02,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:02,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:34:02,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:34:02,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 36 [2022-11-22 01:34:03,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:03,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:03,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:03,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:34:03,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:34:03,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 36 [2022-11-22 01:34:03,121 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:34:03,121 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 17 treesize of output 23 [2022-11-22 01:34:03,150 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:34:03,150 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 [2022-11-22 01:34:03,267 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 11 [2022-11-22 01:34:03,278 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 23 treesize of output 1 [2022-11-22 01:34:03,287 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 11 [2022-11-22 01:34:03,321 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 23 treesize of output 1 [2022-11-22 01:34:03,346 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-22 01:34:03,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 34 [2022-11-22 01:34:03,374 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-22 01:34:03,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 34 [2022-11-22 01:34:03,436 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-22 01:34:03,436 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 3 case distinctions, treesize of input 50 treesize of output 61 [2022-11-22 01:34:03,508 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-22 01:34:03,508 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 3 case distinctions, treesize of input 50 treesize of output 61 [2022-11-22 01:34:03,536 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 [2022-11-22 01:34:03,741 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 11 [2022-11-22 01:34:03,752 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 11 [2022-11-22 01:34:03,764 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 23 treesize of output 1 [2022-11-22 01:34:04,118 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 23 treesize of output 1 [2022-11-22 01:34:04,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:04,151 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-22 01:34:04,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-22 01:34:04,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:04,192 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-22 01:34:04,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-22 01:34:05,248 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:34:05,248 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 [2022-11-22 01:34:05,261 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 17 treesize of output 19 [2022-11-22 01:34:05,335 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 23 treesize of output 1 [2022-11-22 01:34:05,343 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 11 [2022-11-22 01:34:05,353 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 11 [2022-11-22 01:34:05,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-22 01:34:05,399 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-22 01:34:05,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 34 [2022-11-22 01:34:05,440 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-22 01:34:05,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 34 [2022-11-22 01:34:05,507 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-22 01:34:05,507 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 3 case distinctions, treesize of input 50 treesize of output 61 [2022-11-22 01:34:05,528 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 [2022-11-22 01:34:05,606 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-22 01:34:05,607 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 3 case distinctions, treesize of input 50 treesize of output 61 [2022-11-22 01:34:06,097 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 11 [2022-11-22 01:34:06,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 01:34:06,120 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 23 treesize of output 1 [2022-11-22 01:34:06,459 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 23 treesize of output 1 [2022-11-22 01:34:06,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:06,501 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-22 01:34:06,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-22 01:34:06,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:06,533 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-22 01:34:06,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-22 01:34:06,934 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:34:06,934 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 17 treesize of output 23 [2022-11-22 01:34:06,969 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:34:06,969 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 [2022-11-22 01:34:07,056 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 69 for LOIs [2022-11-22 01:34:07,062 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:34:14,995 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33544#(and (<= |~#list~0.base| 3) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_append_one_#in~to#1| 2147483647) (<= |ULTIMATE.start_create_item_#in~at#1| 2147483647) (<= ~i~0 0) (<= |ULTIMATE.start_append_one_~to#1| 2147483647) (<= |ULTIMATE.start_main_~z~0#1| 0) (<= |ULTIMATE.start_append_one_~list#1.base| 3) (<= |ULTIMATE.start_append_one_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_append_one_~list#1.offset|) (<= |ULTIMATE.start_append_one_~list#1.offset| 0) (<= |ULTIMATE.start_main_#t~ret22#1| 2147483647) (<= 0 ~i~0) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= 0 (+ 2147483648 |ULTIMATE.start_append_one_~to#1|)) (<= 0 |ULTIMATE.start_create_item_~head~0#1.offset|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_create_item_~at#1| 2147483647) (<= 0 |ULTIMATE.start_main_~length~0#1|) (<= 0 (+ |ULTIMATE.start_append_one_#in~to#1| 2147483648)) (<= 0 |ULTIMATE.start_append_one_#in~list#1.offset|) (<= 3 |ULTIMATE.start_append_one_~list#1.base|) (<= 0 |ULTIMATE.start_create_item_~item~0#1.offset|) (<= 0 (+ |ULTIMATE.start_main_#t~ret22#1| 2147483648)) (<= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_create_item_~at#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_create_item_#in~at#1| 2147483648)) (<= |ULTIMATE.start_create_item_~item~0#1.offset| 0) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_create_item_~head~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_append_one_#in~list#1.base| 3) (<= |~#list~0.offset| 0) (<= 0 |ULTIMATE.start_main_~z~0#1|) (<= 3 |ULTIMATE.start_append_one_#in~list#1.base|))' at error location [2022-11-22 01:34:14,995 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:34:14,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:34:14,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 29 [2022-11-22 01:34:14,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540016043] [2022-11-22 01:34:14,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:34:14,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-22 01:34:14,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:34:14,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-22 01:34:14,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=2797, Unknown=0, NotChecked=0, Total=3080 [2022-11-22 01:34:14,998 INFO L87 Difference]: Start difference. First operand 1496 states and 2201 transitions. Second operand has 30 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 27 states have internal predecessors, (60), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 01:34:18,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:34:18,090 INFO L93 Difference]: Finished difference Result 2421 states and 3557 transitions. [2022-11-22 01:34:18,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-22 01:34:18,090 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 27 states have internal predecessors, (60), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2022-11-22 01:34:18,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:34:18,099 INFO L225 Difference]: With dead ends: 2421 [2022-11-22 01:34:18,099 INFO L226 Difference]: Without dead ends: 2421 [2022-11-22 01:34:18,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1764 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=705, Invalid=5457, Unknown=0, NotChecked=0, Total=6162 [2022-11-22 01:34:18,101 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 1339 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 2419 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1344 SdHoareTripleChecker+Valid, 1666 SdHoareTripleChecker+Invalid, 2579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 2419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:34:18,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1344 Valid, 1666 Invalid, 2579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 2419 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-22 01:34:18,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2421 states. [2022-11-22 01:34:18,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2421 to 1628. [2022-11-22 01:34:18,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 1458 states have (on average 1.5164609053497942) internal successors, (2211), 1511 states have internal predecessors, (2211), 86 states have call successors, (86), 47 states have call predecessors, (86), 47 states have return successors, (86), 69 states have call predecessors, (86), 86 states have call successors, (86) [2022-11-22 01:34:18,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 2383 transitions. [2022-11-22 01:34:18,160 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 2383 transitions. Word has length 36 [2022-11-22 01:34:18,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:34:18,161 INFO L495 AbstractCegarLoop]: Abstraction has 1628 states and 2383 transitions. [2022-11-22 01:34:18,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 27 states have internal predecessors, (60), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 01:34:18,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 2383 transitions. [2022-11-22 01:34:18,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-22 01:34:18,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:34:18,162 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:34:18,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 01:34:18,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-22 01:34:18,368 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:34:18,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:34:18,369 INFO L85 PathProgramCache]: Analyzing trace with hash -93290115, now seen corresponding path program 1 times [2022-11-22 01:34:18,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:34:18,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419188448] [2022-11-22 01:34:18,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:34:18,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:34:18,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:34:20,710 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:34:20,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:34:20,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419188448] [2022-11-22 01:34:20,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419188448] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:34:20,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900195079] [2022-11-22 01:34:20,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:34:20,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:34:20,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:34:20,712 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:34:20,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 01:34:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:34:20,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-22 01:34:20,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:34:21,063 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 [2022-11-22 01:34:21,068 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 [2022-11-22 01:34:21,318 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 11 [2022-11-22 01:34:21,328 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 11 [2022-11-22 01:34:21,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:21,459 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 27 treesize of output 26 [2022-11-22 01:34:21,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:21,465 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 42 treesize of output 33 [2022-11-22 01:34:21,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:21,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-22 01:34:21,758 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 14 [2022-11-22 01:34:21,765 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 01:34:21,766 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 [2022-11-22 01:34:21,771 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 19 treesize of output 7 [2022-11-22 01:34:21,928 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:34:21,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:34:30,601 WARN L233 SmtUtils]: Spent 8.16s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:34:35,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900195079] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:34:35,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1037575712] [2022-11-22 01:34:35,011 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-22 01:34:35,012 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:34:35,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:34:35,012 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:34:35,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:34:35,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:34:35,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 38 [2022-11-22 01:34:35,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:34:35,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,243 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 43 treesize of output 41 [2022-11-22 01:34:35,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,262 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 38 treesize of output 21 [2022-11-22 01:34:35,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:34:35,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,281 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 43 treesize of output 41 [2022-11-22 01:34:35,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,349 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 38 treesize of output 21 [2022-11-22 01:34:35,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-11-22 01:34:35,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,405 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-11-22 01:34:35,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,471 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 28 treesize of output 30 [2022-11-22 01:34:35,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,497 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 55 [2022-11-22 01:34:35,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,524 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 55 [2022-11-22 01:34:35,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-11-22 01:34:35,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,674 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-22 01:34:35,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,702 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-22 01:34:35,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-11-22 01:34:35,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:34:35,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:34:35,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 72 [2022-11-22 01:34:35,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:34:35,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:35,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:34:35,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 64 [2022-11-22 01:34:36,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:36,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:36,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:36,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:34:36,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:34:36,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 36 [2022-11-22 01:34:36,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:36,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:36,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:36,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:34:36,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:34:36,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 36 [2022-11-22 01:34:36,358 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:34:36,358 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 17 treesize of output 23 [2022-11-22 01:34:36,388 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:34:36,388 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 [2022-11-22 01:34:36,478 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 23 treesize of output 1 [2022-11-22 01:34:36,490 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 11 [2022-11-22 01:34:36,500 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 11 [2022-11-22 01:34:36,533 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-22 01:34:36,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 34 [2022-11-22 01:34:36,548 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 23 treesize of output 1 [2022-11-22 01:34:36,574 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-22 01:34:36,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 34 [2022-11-22 01:34:36,642 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-22 01:34:36,642 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 3 case distinctions, treesize of input 50 treesize of output 61 [2022-11-22 01:34:36,706 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-22 01:34:36,707 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 3 case distinctions, treesize of input 50 treesize of output 61 [2022-11-22 01:34:36,730 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 [2022-11-22 01:34:36,892 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 11 [2022-11-22 01:34:36,905 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 11 [2022-11-22 01:34:36,918 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 23 treesize of output 1 [2022-11-22 01:34:37,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:37,287 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-22 01:34:37,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-22 01:34:37,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:37,323 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-22 01:34:37,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-22 01:34:37,340 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 23 treesize of output 1 [2022-11-22 01:34:39,802 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:34:39,802 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 17 treesize of output 23 [2022-11-22 01:34:39,835 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:34:39,836 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 [2022-11-22 01:34:39,917 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 11 [2022-11-22 01:34:39,927 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 01:34:39,936 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 23 treesize of output 1 [2022-11-22 01:34:39,975 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-22 01:34:39,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 34 [2022-11-22 01:34:40,003 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-22 01:34:40,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 34 [2022-11-22 01:34:40,018 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 23 treesize of output 1 [2022-11-22 01:34:40,045 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 [2022-11-22 01:34:40,095 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-22 01:34:40,095 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 3 case distinctions, treesize of input 50 treesize of output 61 [2022-11-22 01:34:40,157 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-22 01:34:40,157 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 3 case distinctions, treesize of input 50 treesize of output 61 [2022-11-22 01:34:40,571 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 23 treesize of output 1 [2022-11-22 01:34:40,583 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 11 [2022-11-22 01:34:40,673 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 11 [2022-11-22 01:34:40,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:40,961 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-22 01:34:40,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-22 01:34:40,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:41,001 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-22 01:34:41,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-22 01:34:41,021 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 23 treesize of output 1 [2022-11-22 01:34:41,450 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:34:41,451 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 [2022-11-22 01:34:41,473 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 17 treesize of output 19 [2022-11-22 01:34:41,545 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 69 for LOIs [2022-11-22 01:34:41,550 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:34:50,791 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '37835#(and (<= |~#list~0.base| 3) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_append_one_#in~to#1| 2147483647) (<= |ULTIMATE.start_create_item_#in~at#1| 2147483647) (<= ~i~0 0) (<= |ULTIMATE.start_append_one_~to#1| 2147483647) (<= |ULTIMATE.start_main_~z~0#1| 0) (<= |ULTIMATE.start_append_one_~list#1.base| 3) (<= |ULTIMATE.start_append_one_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_append_one_~list#1.offset|) (<= |ULTIMATE.start_append_one_~list#1.offset| 0) (<= |ULTIMATE.start_main_#t~ret22#1| 2147483647) (<= 0 ~i~0) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= 0 (+ 2147483648 |ULTIMATE.start_append_one_~to#1|)) (<= 0 |ULTIMATE.start_create_item_~head~0#1.offset|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_create_item_~at#1| 2147483647) (<= 0 |ULTIMATE.start_main_~length~0#1|) (<= 0 (+ |ULTIMATE.start_append_one_#in~to#1| 2147483648)) (<= 0 |ULTIMATE.start_append_one_#in~list#1.offset|) (<= 3 |ULTIMATE.start_append_one_~list#1.base|) (<= 0 |ULTIMATE.start_create_item_~item~0#1.offset|) (<= 0 (+ |ULTIMATE.start_main_#t~ret22#1| 2147483648)) (<= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_create_item_~at#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_create_item_#in~at#1| 2147483648)) (<= |ULTIMATE.start_create_item_~item~0#1.offset| 0) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_create_item_~head~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_append_one_#in~list#1.base| 3) (<= |~#list~0.offset| 0) (<= 0 |ULTIMATE.start_main_~z~0#1|) (<= 3 |ULTIMATE.start_append_one_#in~list#1.base|))' at error location [2022-11-22 01:34:50,792 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:34:50,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:34:50,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 34 [2022-11-22 01:34:50,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391815222] [2022-11-22 01:34:50,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:34:50,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-22 01:34:50,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:34:50,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-22 01:34:50,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=3734, Unknown=0, NotChecked=0, Total=4032 [2022-11-22 01:34:50,795 INFO L87 Difference]: Start difference. First operand 1628 states and 2383 transitions. Second operand has 35 states, 31 states have (on average 2.064516129032258) internal successors, (64), 32 states have internal predecessors, (64), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 01:35:06,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:35:06,313 INFO L93 Difference]: Finished difference Result 3660 states and 5205 transitions. [2022-11-22 01:35:06,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-11-22 01:35:06,313 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 31 states have (on average 2.064516129032258) internal successors, (64), 32 states have internal predecessors, (64), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2022-11-22 01:35:06,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:35:06,323 INFO L225 Difference]: With dead ends: 3660 [2022-11-22 01:35:06,323 INFO L226 Difference]: Without dead ends: 3660 [2022-11-22 01:35:06,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5896 ImplicationChecksByTransitivity, 33.7s TimeCoverageRelationStatistics Valid=2394, Invalid=16512, Unknown=0, NotChecked=0, Total=18906 [2022-11-22 01:35:06,327 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 6542 mSDsluCounter, 3194 mSDsCounter, 0 mSdLazyCounter, 4802 mSolverCounterSat, 610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6546 SdHoareTripleChecker+Valid, 3366 SdHoareTripleChecker+Invalid, 5412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 610 IncrementalHoareTripleChecker+Valid, 4802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:35:06,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6546 Valid, 3366 Invalid, 5412 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [610 Valid, 4802 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-22 01:35:06,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3660 states. [2022-11-22 01:35:06,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3660 to 1818. [2022-11-22 01:35:06,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1629 states have (on average 1.5187231430325352) internal successors, (2474), 1686 states have internal predecessors, (2474), 98 states have call successors, (98), 54 states have call predecessors, (98), 54 states have return successors, (98), 77 states have call predecessors, (98), 98 states have call successors, (98) [2022-11-22 01:35:06,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 2670 transitions. [2022-11-22 01:35:06,389 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 2670 transitions. Word has length 36 [2022-11-22 01:35:06,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:35:06,390 INFO L495 AbstractCegarLoop]: Abstraction has 1818 states and 2670 transitions. [2022-11-22 01:35:06,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 31 states have (on average 2.064516129032258) internal successors, (64), 32 states have internal predecessors, (64), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 01:35:06,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 2670 transitions. [2022-11-22 01:35:06,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-22 01:35:06,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:35:06,391 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:35:06,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-22 01:35:06,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-22 01:35:06,598 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:35:06,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:35:06,598 INFO L85 PathProgramCache]: Analyzing trace with hash -729963439, now seen corresponding path program 1 times [2022-11-22 01:35:06,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:35:06,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913654190] [2022-11-22 01:35:06,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:35:06,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:35:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:35:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:35:08,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:35:08,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913654190] [2022-11-22 01:35:08,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913654190] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:35:08,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226590635] [2022-11-22 01:35:08,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:35:08,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:35:08,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:35:08,289 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:35:08,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 01:35:08,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:35:08,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-22 01:35:08,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:35:08,664 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 01:35:08,664 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 [2022-11-22 01:35:08,747 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 14 treesize of output 16 [2022-11-22 01:35:08,771 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 14 treesize of output 16 [2022-11-22 01:35:08,790 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 14 treesize of output 16 [2022-11-22 01:35:09,013 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-22 01:35:09,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2022-11-22 01:35:09,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:35:09,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:09,789 INFO L321 Elim1Store]: treesize reduction 31, result has 38.0 percent of original size [2022-11-22 01:35:09,789 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 66 [2022-11-22 01:35:09,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:09,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2022-11-22 01:35:10,289 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:35:10,290 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 29 treesize of output 29 [2022-11-22 01:35:10,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:10,307 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:35:10,307 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 81 treesize of output 61 [2022-11-22 01:35:10,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:35:10,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:35:11,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:35:11,537 INFO L321 Elim1Store]: treesize reduction 12, result has 83.6 percent of original size [2022-11-22 01:35:11,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 185 treesize of output 213 [2022-11-22 01:35:17,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226590635] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:35:17,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [85588431] [2022-11-22 01:35:17,797 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-22 01:35:17,797 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:35:17,797 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:35:17,798 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:35:17,798 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:35:18,418 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:35:18,419 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 17 treesize of output 23 [2022-11-22 01:35:18,449 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:35:18,449 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 [2022-11-22 01:35:18,525 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 23 treesize of output 1 [2022-11-22 01:35:18,538 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 27 treesize of output 26 [2022-11-22 01:35:18,551 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 27 treesize of output 26 [2022-11-22 01:35:18,596 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 23 treesize of output 1 [2022-11-22 01:35:18,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:18,612 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 38 treesize of output 40 [2022-11-22 01:35:18,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:18,629 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 38 treesize of output 40 [2022-11-22 01:35:18,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:18,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:18,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:18,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-22 01:35:18,708 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 13 treesize of output 9 [2022-11-22 01:35:18,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:18,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:18,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:18,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-22 01:35:18,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:18,785 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-22 01:35:18,805 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 33 treesize of output 13 [2022-11-22 01:35:18,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:18,833 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-22 01:35:18,957 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 33 treesize of output 13 [2022-11-22 01:35:18,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:18,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:35:18,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:18,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 74 [2022-11-22 01:35:19,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:19,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:35:19,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:19,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 74 [2022-11-22 01:35:19,981 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:35:19,981 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 17 treesize of output 23 [2022-11-22 01:35:20,018 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:35:20,018 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 [2022-11-22 01:35:20,160 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 27 treesize of output 26 [2022-11-22 01:35:20,176 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 27 treesize of output 26 [2022-11-22 01:35:20,193 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 23 treesize of output 1 [2022-11-22 01:35:20,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:20,247 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 38 treesize of output 40 [2022-11-22 01:35:20,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:20,264 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 38 treesize of output 40 [2022-11-22 01:35:20,284 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 23 treesize of output 1 [2022-11-22 01:35:20,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:20,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:20,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:20,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-22 01:35:20,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:20,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:20,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:20,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-22 01:35:20,384 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 13 treesize of output 9 [2022-11-22 01:35:20,459 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 33 treesize of output 13 [2022-11-22 01:35:20,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:20,490 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-22 01:35:20,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:20,523 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-22 01:35:20,613 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 27 treesize of output 15 [2022-11-22 01:35:20,629 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 23 treesize of output 1 [2022-11-22 01:35:20,640 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 27 treesize of output 15 [2022-11-22 01:35:21,732 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:35:21,733 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 [2022-11-22 01:35:21,779 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 17 treesize of output 19 [2022-11-22 01:35:21,885 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 27 treesize of output 26 [2022-11-22 01:35:21,906 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 27 treesize of output 26 [2022-11-22 01:35:21,929 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 23 treesize of output 1 [2022-11-22 01:35:21,982 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 23 treesize of output 1 [2022-11-22 01:35:21,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:21,999 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 38 treesize of output 40 [2022-11-22 01:35:22,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:22,016 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 38 treesize of output 40 [2022-11-22 01:35:22,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:22,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:22,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:22,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-22 01:35:22,099 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 13 treesize of output 9 [2022-11-22 01:35:22,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:22,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:22,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:22,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-22 01:35:22,199 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 33 treesize of output 13 [2022-11-22 01:35:22,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:22,218 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-22 01:35:22,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:22,250 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-22 01:35:22,322 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 27 treesize of output 15 [2022-11-22 01:35:22,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-22 01:35:22,354 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 23 treesize of output 1 [2022-11-22 01:35:23,219 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:35:23,220 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 17 treesize of output 23 [2022-11-22 01:35:23,255 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:35:23,255 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 [2022-11-22 01:35:23,350 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 27 treesize of output 26 [2022-11-22 01:35:23,364 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 23 treesize of output 1 [2022-11-22 01:35:23,375 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 27 treesize of output 26 [2022-11-22 01:35:23,438 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 23 treesize of output 1 [2022-11-22 01:35:23,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:23,454 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 38 treesize of output 40 [2022-11-22 01:35:23,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:23,471 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 38 treesize of output 40 [2022-11-22 01:35:23,534 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 [2022-11-22 01:35:23,542 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 [2022-11-22 01:35:23,550 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 [2022-11-22 01:35:23,617 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:35:23,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2022-11-22 01:35:23,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 01:35:23,649 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 11 [2022-11-22 01:35:23,687 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 15 for LOIs [2022-11-22 01:35:23,689 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:35:31,973 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '43721#(and (= |~#list~0.offset| 0) (not (< |ULTIMATE.start_main_~cursor~0#1.base| |#StackHeapBarrier|)) (= (select |#valid| |~#list~0.base|) 1) (= |ULTIMATE.start_main_~next~1#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~cursor~0#1.base|) (+ (* 4 |ULTIMATE.start_main_~direction~0#1|) |ULTIMATE.start_main_~cursor~0#1.offset|))) (= (select (select |#memory_$Pointer$.offset| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|)) |ULTIMATE.start_main_~cursor~0#1.offset|) (= 3 |~#list~0.base|) (<= 0 ~i~0) (<= (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset| 4) (select |#length| |~#list~0.base|)) (< 0 |ULTIMATE.start_main_~length~0#1|) (= 0 |ULTIMATE.start_main_~cursor~0#1.offset|) (= |ULTIMATE.start_main_~y~0#1| 0) (or (and (= ~unnamed2~0~ITEM_NEXT |ULTIMATE.start_main_~direction~0#1|) (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_~end_point~0#1|)) (and (= ~unnamed2~0~ITEM_PREV |ULTIMATE.start_main_~direction~0#1|) (= ~unnamed1~0~LIST_END |ULTIMATE.start_main_~end_point~0#1|))) (= (select |#valid| |ULTIMATE.start_main_~cursor~0#1.base|) 1) (<= (+ (* 4 |ULTIMATE.start_main_~direction~0#1|) 4 |ULTIMATE.start_main_~cursor~0#1.offset|) (select |#length| |ULTIMATE.start_main_~cursor~0#1.base|)) (= |ULTIMATE.start_main_~z~0#1| 0) (= |ULTIMATE.start_main_~next~1#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~cursor~0#1.base|) (+ (* 4 |ULTIMATE.start_main_~direction~0#1|) |ULTIMATE.start_main_~cursor~0#1.offset|))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.base| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|)) |ULTIMATE.start_main_~cursor~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 01:35:31,973 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:35:31,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:35:31,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2022-11-22 01:35:31,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052838605] [2022-11-22 01:35:31,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:35:31,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-22 01:35:31,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:35:31,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-22 01:35:31,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=4376, Unknown=2, NotChecked=0, Total=4692 [2022-11-22 01:35:31,976 INFO L87 Difference]: Start difference. First operand 1818 states and 2670 transitions. Second operand has 29 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 29 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:35:43,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:35:43,828 INFO L93 Difference]: Finished difference Result 3529 states and 5085 transitions. [2022-11-22 01:35:43,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-22 01:35:43,829 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 29 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2022-11-22 01:35:43,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:35:43,841 INFO L225 Difference]: With dead ends: 3529 [2022-11-22 01:35:43,841 INFO L226 Difference]: Without dead ends: 3529 [2022-11-22 01:35:43,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3317 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=1208, Invalid=10780, Unknown=2, NotChecked=0, Total=11990 [2022-11-22 01:35:43,843 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 2341 mSDsluCounter, 2502 mSDsCounter, 0 mSdLazyCounter, 3134 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2341 SdHoareTripleChecker+Valid, 2621 SdHoareTripleChecker+Invalid, 3305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 3134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:35:43,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2341 Valid, 2621 Invalid, 3305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 3134 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-22 01:35:43,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3529 states. [2022-11-22 01:35:43,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3529 to 2295. [2022-11-22 01:35:43,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2295 states, 2061 states have (on average 1.522561863173217) internal successors, (3138), 2131 states have internal predecessors, (3138), 127 states have call successors, (127), 70 states have call predecessors, (127), 70 states have return successors, (127), 93 states have call predecessors, (127), 127 states have call successors, (127) [2022-11-22 01:35:43,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2295 states to 2295 states and 3392 transitions. [2022-11-22 01:35:43,909 INFO L78 Accepts]: Start accepts. Automaton has 2295 states and 3392 transitions. Word has length 36 [2022-11-22 01:35:43,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:35:43,910 INFO L495 AbstractCegarLoop]: Abstraction has 2295 states and 3392 transitions. [2022-11-22 01:35:43,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 29 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:35:43,910 INFO L276 IsEmpty]: Start isEmpty. Operand 2295 states and 3392 transitions. [2022-11-22 01:35:43,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-22 01:35:43,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:35:43,911 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:35:43,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-22 01:35:44,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-22 01:35:44,117 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:35:44,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:35:44,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1726358473, now seen corresponding path program 1 times [2022-11-22 01:35:44,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:35:44,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767180175] [2022-11-22 01:35:44,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:35:44,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:35:44,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:35:44,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:35:44,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:35:44,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767180175] [2022-11-22 01:35:44,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767180175] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:35:44,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:35:44,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 01:35:44,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727473288] [2022-11-22 01:35:44,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:35:44,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:35:44,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:35:44,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:35:44,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:35:44,435 INFO L87 Difference]: Start difference. First operand 2295 states and 3392 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:35:44,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:35:44,754 INFO L93 Difference]: Finished difference Result 2467 states and 3545 transitions. [2022-11-22 01:35:44,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:35:44,755 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2022-11-22 01:35:44,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:35:44,762 INFO L225 Difference]: With dead ends: 2467 [2022-11-22 01:35:44,762 INFO L226 Difference]: Without dead ends: 2467 [2022-11-22 01:35:44,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:35:44,763 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 458 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:35:44,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 186 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:35:44,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2467 states. [2022-11-22 01:35:44,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2467 to 2293. [2022-11-22 01:35:44,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2293 states, 2061 states have (on average 1.490538573508006) internal successors, (3072), 2129 states have internal predecessors, (3072), 127 states have call successors, (127), 70 states have call predecessors, (127), 70 states have return successors, (127), 93 states have call predecessors, (127), 127 states have call successors, (127) [2022-11-22 01:35:44,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 3326 transitions. [2022-11-22 01:35:44,809 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 3326 transitions. Word has length 37 [2022-11-22 01:35:44,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:35:44,809 INFO L495 AbstractCegarLoop]: Abstraction has 2293 states and 3326 transitions. [2022-11-22 01:35:44,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:35:44,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 3326 transitions. [2022-11-22 01:35:44,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-22 01:35:44,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:35:44,810 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:35:44,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-22 01:35:44,811 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:35:44,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:35:44,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1390699727, now seen corresponding path program 2 times [2022-11-22 01:35:44,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:35:44,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045201209] [2022-11-22 01:35:44,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:35:44,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:35:44,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:35:44,899 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:35:44,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:35:44,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045201209] [2022-11-22 01:35:44,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045201209] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:35:44,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574895885] [2022-11-22 01:35:44,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:35:44,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:35:44,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:35:44,901 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:35:44,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 01:35:45,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-22 01:35:45,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:35:45,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-22 01:35:45,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:35:45,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:45,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:45,602 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:35:45,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 123 [2022-11-22 01:35:45,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:45,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:45,627 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:35:45,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 91 [2022-11-22 01:35:45,790 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-22 01:35:45,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:35:45,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574895885] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:35:45,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:35:45,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 14 [2022-11-22 01:35:45,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155078385] [2022-11-22 01:35:45,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:35:45,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 01:35:45,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:35:45,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 01:35:45,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-11-22 01:35:45,792 INFO L87 Difference]: Start difference. First operand 2293 states and 3326 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:35:46,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:35:46,385 INFO L93 Difference]: Finished difference Result 2318 states and 3350 transitions. [2022-11-22 01:35:46,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 01:35:46,385 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-11-22 01:35:46,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:35:46,390 INFO L225 Difference]: With dead ends: 2318 [2022-11-22 01:35:46,390 INFO L226 Difference]: Without dead ends: 2316 [2022-11-22 01:35:46,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-11-22 01:35:46,391 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 138 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:35:46,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 450 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:35:46,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2022-11-22 01:35:46,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 2213. [2022-11-22 01:35:46,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2213 states, 1990 states have (on average 1.4944723618090452) internal successors, (2974), 2055 states have internal predecessors, (2974), 121 states have call successors, (121), 67 states have call predecessors, (121), 67 states have return successors, (121), 90 states have call predecessors, (121), 121 states have call successors, (121) [2022-11-22 01:35:46,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2213 states to 2213 states and 3216 transitions. [2022-11-22 01:35:46,470 INFO L78 Accepts]: Start accepts. Automaton has 2213 states and 3216 transitions. Word has length 37 [2022-11-22 01:35:46,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:35:46,470 INFO L495 AbstractCegarLoop]: Abstraction has 2213 states and 3216 transitions. [2022-11-22 01:35:46,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:35:46,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2213 states and 3216 transitions. [2022-11-22 01:35:46,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-22 01:35:46,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:35:46,474 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:35:46,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-22 01:35:46,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:35:46,679 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:35:46,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:35:46,680 INFO L85 PathProgramCache]: Analyzing trace with hash -921102663, now seen corresponding path program 1 times [2022-11-22 01:35:46,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:35:46,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590510992] [2022-11-22 01:35:46,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:35:46,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:35:46,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:35:48,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:35:48,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:35:48,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590510992] [2022-11-22 01:35:48,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590510992] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:35:48,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326311659] [2022-11-22 01:35:48,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:35:48,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:35:48,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:35:48,349 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:35:48,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 01:35:48,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:35:48,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-22 01:35:48,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:35:48,996 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 11 [2022-11-22 01:35:49,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:49,133 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 51 treesize of output 34 [2022-11-22 01:35:49,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:49,381 INFO L321 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2022-11-22 01:35:49,381 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 48 treesize of output 21 [2022-11-22 01:35:49,421 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 [2022-11-22 01:35:49,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:35:49,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:35:49,752 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 150 treesize of output 142 [2022-11-22 01:35:49,856 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 134 treesize of output 126 [2022-11-22 01:38:10,183 WARN L233 SmtUtils]: Spent 2.34m on a formula simplification. DAG size of input: 71 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:39:02,415 WARN L233 SmtUtils]: Spent 48.10s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:39:56,280 WARN L233 SmtUtils]: Spent 47.71s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:40:28,641 WARN L233 SmtUtils]: Spent 32.08s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:40:36,784 WARN L233 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:40:38,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326311659] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:40:38,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [866684209] [2022-11-22 01:40:38,895 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-22 01:40:38,895 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:40:38,895 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:40:38,896 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:40:38,896 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:40:39,556 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:40:39,557 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 [2022-11-22 01:40:39,580 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 17 treesize of output 19 [2022-11-22 01:40:39,652 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 27 treesize of output 26 [2022-11-22 01:40:39,665 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 27 treesize of output 26 [2022-11-22 01:40:39,686 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 23 treesize of output 1 [2022-11-22 01:40:39,709 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 23 treesize of output 1 [2022-11-22 01:40:39,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:39,724 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 38 treesize of output 40 [2022-11-22 01:40:39,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:39,747 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 38 treesize of output 40 [2022-11-22 01:40:39,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:39,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:39,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:39,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-22 01:40:39,807 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 13 treesize of output 9 [2022-11-22 01:40:39,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:39,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:39,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:39,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-22 01:40:39,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:39,907 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-22 01:40:39,924 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 33 treesize of output 13 [2022-11-22 01:40:39,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:39,942 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-22 01:40:40,055 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 33 treesize of output 13 [2022-11-22 01:40:40,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:40,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:40:40,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:40,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 74 [2022-11-22 01:40:40,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:40,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:40:40,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:40,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 74 [2022-11-22 01:40:41,041 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:40:41,042 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 17 treesize of output 23 [2022-11-22 01:40:41,106 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:40:41,107 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 [2022-11-22 01:40:41,227 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 27 treesize of output 26 [2022-11-22 01:40:41,253 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 27 treesize of output 26 [2022-11-22 01:40:41,267 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 23 treesize of output 1 [2022-11-22 01:40:41,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:41,303 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 38 treesize of output 40 [2022-11-22 01:40:41,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:41,323 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 38 treesize of output 40 [2022-11-22 01:40:41,357 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 23 treesize of output 1 [2022-11-22 01:40:41,415 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 13 treesize of output 9 [2022-11-22 01:40:41,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:41,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:41,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:41,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-22 01:40:41,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:41,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:41,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:41,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-22 01:40:41,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:41,545 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-22 01:40:41,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:41,578 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-22 01:40:41,600 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 33 treesize of output 13 [2022-11-22 01:40:41,680 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 27 treesize of output 15 [2022-11-22 01:40:41,698 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 27 treesize of output 15 [2022-11-22 01:40:41,711 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 23 treesize of output 1 [2022-11-22 01:40:42,733 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:40:42,733 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 [2022-11-22 01:40:42,745 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 17 treesize of output 19 [2022-11-22 01:40:42,829 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 23 treesize of output 1 [2022-11-22 01:40:42,847 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 27 treesize of output 26 [2022-11-22 01:40:42,866 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 27 treesize of output 26 [2022-11-22 01:40:42,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:42,904 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 38 treesize of output 40 [2022-11-22 01:40:42,920 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 23 treesize of output 1 [2022-11-22 01:40:42,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:42,953 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 38 treesize of output 40 [2022-11-22 01:40:42,998 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 13 treesize of output 9 [2022-11-22 01:40:43,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:43,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:43,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:43,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-22 01:40:43,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:43,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:43,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:43,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-22 01:40:43,137 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 33 treesize of output 13 [2022-11-22 01:40:43,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:43,157 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-22 01:40:43,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:43,195 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-22 01:40:43,271 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 27 treesize of output 15 [2022-11-22 01:40:43,284 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 23 treesize of output 1 [2022-11-22 01:40:43,296 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 27 treesize of output 15 [2022-11-22 01:40:43,989 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-22 01:40:43,990 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 33 treesize of output 37 [2022-11-22 01:40:44,025 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 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-22 01:40:44,054 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 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-22 01:40:44,231 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:40:44,231 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 17 treesize of output 23 [2022-11-22 01:40:44,274 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:40:44,274 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 [2022-11-22 01:40:44,361 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 27 treesize of output 26 [2022-11-22 01:40:44,380 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 23 treesize of output 1 [2022-11-22 01:40:44,393 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 27 treesize of output 26 [2022-11-22 01:40:44,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:44,435 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 38 treesize of output 40 [2022-11-22 01:40:44,449 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 23 treesize of output 1 [2022-11-22 01:40:44,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:44,463 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 38 treesize of output 40 [2022-11-22 01:40:44,509 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 [2022-11-22 01:40:44,518 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 [2022-11-22 01:40:44,527 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 [2022-11-22 01:40:44,570 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 11 [2022-11-22 01:40:44,615 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:40:44,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2022-11-22 01:40:44,630 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 11 [2022-11-22 01:40:44,670 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 15 for LOIs [2022-11-22 01:40:44,672 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:40:51,388 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '59338#(and (= |~#list~0.offset| 0) (= 3 |~#list~0.base|) (<= 0 ~i~0) (not (< 0 |ULTIMATE.start_main_~length~0#1|)) (<= 0 (+ |ULTIMATE.start_main_~length~0#1| 1)) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= |ULTIMATE.start_main_~y~0#1| 0) (= |ULTIMATE.start_main_~z~0#1| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-22 01:40:51,388 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:40:51,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:40:51,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2022-11-22 01:40:51,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131406110] [2022-11-22 01:40:51,389 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:40:51,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-22 01:40:51,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:40:51,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-22 01:40:51,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=3848, Unknown=6, NotChecked=0, Total=4160 [2022-11-22 01:40:51,390 INFO L87 Difference]: Start difference. First operand 2213 states and 3216 transitions. Second operand has 28 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 26 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:40:54,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:40:54,328 INFO L93 Difference]: Finished difference Result 2335 states and 3366 transitions. [2022-11-22 01:40:54,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-22 01:40:54,328 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 26 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2022-11-22 01:40:54,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:40:54,333 INFO L225 Difference]: With dead ends: 2335 [2022-11-22 01:40:54,333 INFO L226 Difference]: Without dead ends: 2334 [2022-11-22 01:40:54,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1816 ImplicationChecksByTransitivity, 297.7s TimeCoverageRelationStatistics Valid=557, Invalid=5443, Unknown=6, NotChecked=0, Total=6006 [2022-11-22 01:40:54,335 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 1319 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1321 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:40:54,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1321 Valid, 987 Invalid, 1578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1475 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-22 01:40:54,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2334 states. [2022-11-22 01:40:54,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2334 to 2219. [2022-11-22 01:40:54,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2219 states, 1996 states have (on average 1.4934869739478958) internal successors, (2981), 2061 states have internal predecessors, (2981), 121 states have call successors, (121), 67 states have call predecessors, (121), 67 states have return successors, (121), 90 states have call predecessors, (121), 121 states have call successors, (121) [2022-11-22 01:40:54,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2219 states to 2219 states and 3223 transitions. [2022-11-22 01:40:54,374 INFO L78 Accepts]: Start accepts. Automaton has 2219 states and 3223 transitions. Word has length 39 [2022-11-22 01:40:54,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:40:54,374 INFO L495 AbstractCegarLoop]: Abstraction has 2219 states and 3223 transitions. [2022-11-22 01:40:54,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 26 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:40:54,375 INFO L276 IsEmpty]: Start isEmpty. Operand 2219 states and 3223 transitions. [2022-11-22 01:40:54,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-22 01:40:54,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:40:54,376 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:40:54,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 01:40:54,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-22 01:40:54,582 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:40:54,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:40:54,582 INFO L85 PathProgramCache]: Analyzing trace with hash -921103948, now seen corresponding path program 1 times [2022-11-22 01:40:54,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:40:54,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789337204] [2022-11-22 01:40:54,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:40:54,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:40:54,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:40:54,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:54,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:40:54,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789337204] [2022-11-22 01:40:54,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789337204] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:40:54,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976662105] [2022-11-22 01:40:54,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:40:54,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:40:54,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:40:54,649 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:40:54,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 01:40:54,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:40:54,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:40:54,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:40:54,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:54,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:40:54,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:54,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976662105] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:40:54,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [62624029] [2022-11-22 01:40:54,977 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-22 01:40:54,977 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:40:54,977 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:40:54,977 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:40:54,978 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:40:55,656 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:40:55,657 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 [2022-11-22 01:40:55,670 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 17 treesize of output 19 [2022-11-22 01:40:55,741 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 27 treesize of output 26 [2022-11-22 01:40:55,761 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 27 treesize of output 26 [2022-11-22 01:40:55,778 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 23 treesize of output 1 [2022-11-22 01:40:55,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:55,814 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 38 treesize of output 40 [2022-11-22 01:40:55,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:55,838 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 38 treesize of output 40 [2022-11-22 01:40:55,858 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 23 treesize of output 1 [2022-11-22 01:40:55,899 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 13 treesize of output 9 [2022-11-22 01:40:55,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:55,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:55,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:55,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-22 01:40:55,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:55,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:55,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:55,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-22 01:40:56,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:56,014 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-22 01:40:56,053 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 33 treesize of output 13 [2022-11-22 01:40:56,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:56,075 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-22 01:40:56,170 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 33 treesize of output 13 [2022-11-22 01:40:56,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:56,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:40:56,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:56,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 74 [2022-11-22 01:40:56,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:56,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:40:56,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:56,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 74 [2022-11-22 01:40:57,235 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:40:57,235 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 17 treesize of output 23 [2022-11-22 01:40:57,268 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:40:57,269 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 [2022-11-22 01:40:57,339 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 23 treesize of output 1 [2022-11-22 01:40:57,374 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 27 treesize of output 26 [2022-11-22 01:40:57,388 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 27 treesize of output 26 [2022-11-22 01:40:57,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,424 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 38 treesize of output 40 [2022-11-22 01:40:57,438 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 23 treesize of output 1 [2022-11-22 01:40:57,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,451 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 38 treesize of output 40 [2022-11-22 01:40:57,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-22 01:40:57,507 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 13 treesize of output 9 [2022-11-22 01:40:57,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-22 01:40:57,596 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 33 treesize of output 13 [2022-11-22 01:40:57,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,618 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-22 01:40:57,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:57,641 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-22 01:40:57,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-22 01:40:57,733 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 27 treesize of output 15 [2022-11-22 01:40:57,745 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 27 treesize of output 15 [2022-11-22 01:40:58,755 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:40:58,755 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 [2022-11-22 01:40:58,768 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 17 treesize of output 19 [2022-11-22 01:40:58,875 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 23 treesize of output 1 [2022-11-22 01:40:58,892 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 27 treesize of output 26 [2022-11-22 01:40:58,908 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 27 treesize of output 26 [2022-11-22 01:40:58,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:58,943 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 38 treesize of output 40 [2022-11-22 01:40:58,978 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 23 treesize of output 1 [2022-11-22 01:40:58,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:58,994 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 38 treesize of output 40 [2022-11-22 01:40:59,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:59,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:59,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:59,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-22 01:40:59,072 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 13 treesize of output 9 [2022-11-22 01:40:59,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:59,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:59,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:59,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-22 01:40:59,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:59,188 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-22 01:40:59,206 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 33 treesize of output 13 [2022-11-22 01:40:59,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:40:59,225 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-22 01:40:59,308 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 27 treesize of output 15 [2022-11-22 01:40:59,318 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 23 treesize of output 1 [2022-11-22 01:40:59,329 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 27 treesize of output 15 [2022-11-22 01:41:00,020 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-22 01:41:00,021 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 33 treesize of output 37 [2022-11-22 01:41:00,054 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 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-22 01:41:00,081 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 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-22 01:41:00,250 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:41:00,250 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 17 treesize of output 23 [2022-11-22 01:41:00,282 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:41:00,282 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 [2022-11-22 01:41:00,358 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 27 treesize of output 26 [2022-11-22 01:41:00,372 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 23 treesize of output 1 [2022-11-22 01:41:00,383 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 27 treesize of output 26 [2022-11-22 01:41:00,412 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 23 treesize of output 1 [2022-11-22 01:41:00,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:00,428 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 38 treesize of output 40 [2022-11-22 01:41:00,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:00,449 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 38 treesize of output 40 [2022-11-22 01:41:00,519 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 [2022-11-22 01:41:00,527 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 [2022-11-22 01:41:00,534 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 [2022-11-22 01:41:00,565 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 11 [2022-11-22 01:41:00,577 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 11 [2022-11-22 01:41:00,615 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:41:00,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2022-11-22 01:41:00,653 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 15 for LOIs [2022-11-22 01:41:00,655 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:41:05,140 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '64178#(and (= |~#list~0.offset| 0) (= 3 |~#list~0.base|) (<= 0 ~i~0) (not (= (select |#valid| |ULTIMATE.start_main_~cursor~0#1.base|) 1)) (= |ULTIMATE.start_main_~y~0#1| 0) (<= 0 |ULTIMATE.start_main_~length~0#1|) (= |ULTIMATE.start_main_~z~0#1| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:41:05,140 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:41:05,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:41:05,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-11-22 01:41:05,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887782409] [2022-11-22 01:41:05,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:41:05,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:41:05,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:41:05,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:41:05,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2022-11-22 01:41:05,142 INFO L87 Difference]: Start difference. First operand 2219 states and 3223 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:41:05,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:41:05,325 INFO L93 Difference]: Finished difference Result 3876 states and 5664 transitions. [2022-11-22 01:41:05,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:41:05,326 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2022-11-22 01:41:05,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:41:05,334 INFO L225 Difference]: With dead ends: 3876 [2022-11-22 01:41:05,334 INFO L226 Difference]: Without dead ends: 3868 [2022-11-22 01:41:05,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 87 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2022-11-22 01:41:05,334 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 329 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:41:05,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 409 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:41:05,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3868 states. [2022-11-22 01:41:05,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3868 to 3013. [2022-11-22 01:41:05,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3013 states, 2745 states have (on average 1.5074681238615666) internal successors, (4138), 2818 states have internal predecessors, (4138), 166 states have call successors, (166), 67 states have call predecessors, (166), 67 states have return successors, (166), 127 states have call predecessors, (166), 166 states have call successors, (166) [2022-11-22 01:41:05,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 4470 transitions. [2022-11-22 01:41:05,387 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 4470 transitions. Word has length 39 [2022-11-22 01:41:05,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:41:05,387 INFO L495 AbstractCegarLoop]: Abstraction has 3013 states and 4470 transitions. [2022-11-22 01:41:05,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:41:05,388 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 4470 transitions. [2022-11-22 01:41:05,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-22 01:41:05,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:41:05,389 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:41:05,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-22 01:41:05,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:41:05,595 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:41:05,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:41:05,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1576652340, now seen corresponding path program 1 times [2022-11-22 01:41:05,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:41:05,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848230755] [2022-11-22 01:41:05,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:41:05,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:41:05,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:41:05,727 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 01:41:05,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:41:05,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848230755] [2022-11-22 01:41:05,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848230755] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:41:05,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823839614] [2022-11-22 01:41:05,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:41:05,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:41:05,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:41:05,729 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:41:05,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 01:41:05,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:41:05,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 01:41:05,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:41:06,040 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:41:06,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:41:06,064 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-22 01:41:06,064 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 12 treesize of output 11 [2022-11-22 01:41:06,088 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 01:41:06,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823839614] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:41:06,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [446221447] [2022-11-22 01:41:06,090 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2022-11-22 01:41:06,090 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:41:06,091 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:41:06,091 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:41:06,091 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:41:06,790 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-22 01:41:06,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 49 [2022-11-22 01:41:06,982 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-22 01:41:06,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 49 [2022-11-22 01:41:07,323 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 27 for LOIs [2022-11-22 01:41:07,326 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:41:13,289 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '71345#(and (= |~#list~0.offset| 0) (<= |ULTIMATE.start_is_empty_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_is_empty_#in~list#1.offset|) (<= 3 |ULTIMATE.start_is_empty_#in~list#1.base|) (= 3 |~#list~0.base|) (<= 0 ~i~0) (<= |ULTIMATE.start_remove_one_#in~list#1.base| 3) (<= 0 (+ |ULTIMATE.start_main_#t~ret27#1| 2147483648)) (not (= (select |#valid| |ULTIMATE.start_is_empty_~list#1.base|) 1)) (<= 3 |ULTIMATE.start_is_empty_~list#1.base|) (= |ULTIMATE.start_main_~y~0#1| 0) (<= |ULTIMATE.start_is_empty_#in~list#1.base| 3) (<= 0 |ULTIMATE.start_remove_one_~list#1.offset|) (<= |ULTIMATE.start_is_empty_~list#1.offset| 0) (<= 0 (+ |ULTIMATE.start_remove_one_~from#1| 2147483648)) (<= |ULTIMATE.start_remove_one_~from#1| 2147483647) (<= 3 |ULTIMATE.start_remove_one_#in~list#1.base|) (<= |ULTIMATE.start_main_#t~ret27#1| 2147483647) (<= |ULTIMATE.start_remove_one_~list#1.base| 3) (= |ULTIMATE.start_main_~z~0#1| 0) (<= 0 (+ |ULTIMATE.start_remove_one_#in~from#1| 2147483648)) (<= 0 |ULTIMATE.start_remove_one_#in~list#1.offset|) (<= |ULTIMATE.start_remove_one_#in~from#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_is_empty_~list#1.offset|) (<= 3 |ULTIMATE.start_remove_one_~list#1.base|) (<= |ULTIMATE.start_is_empty_~list#1.base| 3) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_remove_one_#in~list#1.offset| 0) (= |ULTIMATE.start_main_~length~0#1| 0) (<= |ULTIMATE.start_remove_one_~list#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-22 01:41:13,289 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:41:13,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:41:13,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-22 01:41:13,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083101847] [2022-11-22 01:41:13,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:41:13,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 01:41:13,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:41:13,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 01:41:13,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=818, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 01:41:13,291 INFO L87 Difference]: Start difference. First operand 3013 states and 4470 transitions. Second operand has 12 states, 11 states have (on average 6.0) internal successors, (66), 12 states have internal predecessors, (66), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 01:41:14,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:41:14,250 INFO L93 Difference]: Finished difference Result 9214 states and 13357 transitions. [2022-11-22 01:41:14,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 01:41:14,251 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.0) internal successors, (66), 12 states have internal predecessors, (66), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2022-11-22 01:41:14,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:41:14,273 INFO L225 Difference]: With dead ends: 9214 [2022-11-22 01:41:14,273 INFO L226 Difference]: Without dead ends: 9214 [2022-11-22 01:41:14,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 91 SyntacticMatches, 10 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=468, Invalid=1338, Unknown=0, NotChecked=0, Total=1806 [2022-11-22 01:41:14,274 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 1409 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1411 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:41:14,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1411 Valid, 542 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 01:41:14,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9214 states. [2022-11-22 01:41:14,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9214 to 4038. [2022-11-22 01:41:14,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4038 states, 3659 states have (on average 1.4129543591145122) internal successors, (5170), 3744 states have internal predecessors, (5170), 251 states have call successors, (251), 99 states have call predecessors, (251), 99 states have return successors, (251), 194 states have call predecessors, (251), 251 states have call successors, (251) [2022-11-22 01:41:14,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4038 states to 4038 states and 5672 transitions. [2022-11-22 01:41:14,396 INFO L78 Accepts]: Start accepts. Automaton has 4038 states and 5672 transitions. Word has length 41 [2022-11-22 01:41:14,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:41:14,396 INFO L495 AbstractCegarLoop]: Abstraction has 4038 states and 5672 transitions. [2022-11-22 01:41:14,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.0) internal successors, (66), 12 states have internal predecessors, (66), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 01:41:14,397 INFO L276 IsEmpty]: Start isEmpty. Operand 4038 states and 5672 transitions. [2022-11-22 01:41:14,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-22 01:41:14,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:41:14,398 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 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] [2022-11-22 01:41:14,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-22 01:41:14,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:41:14,603 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:41:14,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:41:14,604 INFO L85 PathProgramCache]: Analyzing trace with hash 2121445166, now seen corresponding path program 1 times [2022-11-22 01:41:14,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:41:14,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126535667] [2022-11-22 01:41:14,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:41:14,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:41:14,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:41:15,708 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:41:15,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:41:15,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126535667] [2022-11-22 01:41:15,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126535667] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:41:15,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:41:15,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-22 01:41:15,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492216777] [2022-11-22 01:41:15,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:41:15,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 01:41:15,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:41:15,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 01:41:15,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-22 01:41:15,710 INFO L87 Difference]: Start difference. First operand 4038 states and 5672 transitions. Second operand has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:41:16,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:41:16,571 INFO L93 Difference]: Finished difference Result 3394 states and 4749 transitions. [2022-11-22 01:41:16,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 01:41:16,572 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-11-22 01:41:16,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:41:16,578 INFO L225 Difference]: With dead ends: 3394 [2022-11-22 01:41:16,578 INFO L226 Difference]: Without dead ends: 3394 [2022-11-22 01:41:16,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2022-11-22 01:41:16,579 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 95 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:41:16,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 458 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:41:16,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3394 states. [2022-11-22 01:41:16,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3394 to 3383. [2022-11-22 01:41:16,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3383 states, 3063 states have (on average 1.4126673196212862) internal successors, (4327), 3140 states have internal predecessors, (4327), 209 states have call successors, (209), 82 states have call predecessors, (209), 82 states have return successors, (209), 160 states have call predecessors, (209), 209 states have call successors, (209) [2022-11-22 01:41:16,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3383 states to 3383 states and 4745 transitions. [2022-11-22 01:41:16,632 INFO L78 Accepts]: Start accepts. Automaton has 3383 states and 4745 transitions. Word has length 40 [2022-11-22 01:41:16,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:41:16,633 INFO L495 AbstractCegarLoop]: Abstraction has 3383 states and 4745 transitions. [2022-11-22 01:41:16,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:41:16,633 INFO L276 IsEmpty]: Start isEmpty. Operand 3383 states and 4745 transitions. [2022-11-22 01:41:16,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-22 01:41:16,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:41:16,634 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:41:16,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-11-22 01:41:16,634 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:41:16,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:41:16,635 INFO L85 PathProgramCache]: Analyzing trace with hash 2086654320, now seen corresponding path program 1 times [2022-11-22 01:41:16,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:41:16,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494916132] [2022-11-22 01:41:16,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:41:16,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:41:16,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:41:18,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:41:18,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:41:18,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494916132] [2022-11-22 01:41:18,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494916132] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:41:18,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710964269] [2022-11-22 01:41:18,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:41:18,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:41:18,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:41:18,299 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:41:18,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-22 01:41:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:41:18,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-22 01:41:18,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:41:18,640 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 [2022-11-22 01:41:18,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 01:41:19,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:19,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 35 [2022-11-22 01:41:19,453 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 13 [2022-11-22 01:41:19,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:41:19,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:41:19,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710964269] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:41:19,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:41:19,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [17] total 32 [2022-11-22 01:41:19,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664504136] [2022-11-22 01:41:19,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:41:19,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-22 01:41:19,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:41:19,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-22 01:41:19,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2022-11-22 01:41:19,489 INFO L87 Difference]: Start difference. First operand 3383 states and 4745 transitions. Second operand has 17 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:41:21,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:41:21,565 INFO L93 Difference]: Finished difference Result 3864 states and 5422 transitions. [2022-11-22 01:41:21,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-22 01:41:21,566 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-11-22 01:41:21,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:41:21,573 INFO L225 Difference]: With dead ends: 3864 [2022-11-22 01:41:21,574 INFO L226 Difference]: Without dead ends: 3864 [2022-11-22 01:41:21,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=395, Invalid=2055, Unknown=0, NotChecked=0, Total=2450 [2022-11-22 01:41:21,575 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 619 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:41:21,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [623 Valid, 858 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:41:21,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3864 states. [2022-11-22 01:41:21,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3864 to 3501. [2022-11-22 01:41:21,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3501 states, 3181 states have (on average 1.4168500471549828) internal successors, (4507), 3258 states have internal predecessors, (4507), 209 states have call successors, (209), 82 states have call predecessors, (209), 82 states have return successors, (209), 160 states have call predecessors, (209), 209 states have call successors, (209) [2022-11-22 01:41:21,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3501 states to 3501 states and 4925 transitions. [2022-11-22 01:41:21,635 INFO L78 Accepts]: Start accepts. Automaton has 3501 states and 4925 transitions. Word has length 41 [2022-11-22 01:41:21,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:41:21,635 INFO L495 AbstractCegarLoop]: Abstraction has 3501 states and 4925 transitions. [2022-11-22 01:41:21,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:41:21,636 INFO L276 IsEmpty]: Start isEmpty. Operand 3501 states and 4925 transitions. [2022-11-22 01:41:21,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-22 01:41:21,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:41:21,637 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:41:21,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-22 01:41:21,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:41:21,843 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr41REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:41:21,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:41:21,843 INFO L85 PathProgramCache]: Analyzing trace with hash 2086654321, now seen corresponding path program 1 times [2022-11-22 01:41:21,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:41:21,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255009843] [2022-11-22 01:41:21,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:41:21,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:41:21,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:41:24,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:41:24,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:41:24,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255009843] [2022-11-22 01:41:24,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255009843] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:41:24,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104506579] [2022-11-22 01:41:24,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:41:24,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:41:24,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:41:24,156 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:41:24,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-22 01:41:24,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:41:24,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-22 01:41:24,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:41:24,524 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 [2022-11-22 01:41:24,777 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 11 [2022-11-22 01:41:24,784 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 11 [2022-11-22 01:41:24,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:24,906 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 28 [2022-11-22 01:41:24,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:24,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-22 01:41:25,354 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 19 treesize of output 7 [2022-11-22 01:41:25,358 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 21 treesize of output 9 [2022-11-22 01:41:25,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:41:25,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:41:25,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104506579] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:41:25,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:41:25,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [19] total 33 [2022-11-22 01:41:25,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629384768] [2022-11-22 01:41:25,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:41:25,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-22 01:41:25,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:41:25,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-22 01:41:25,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2022-11-22 01:41:25,406 INFO L87 Difference]: Start difference. First operand 3501 states and 4925 transitions. Second operand has 16 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:41:28,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:41:28,372 INFO L93 Difference]: Finished difference Result 4284 states and 6000 transitions. [2022-11-22 01:41:28,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-22 01:41:28,373 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-11-22 01:41:28,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:41:28,383 INFO L225 Difference]: With dead ends: 4284 [2022-11-22 01:41:28,383 INFO L226 Difference]: Without dead ends: 4284 [2022-11-22 01:41:28,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=441, Invalid=2981, Unknown=0, NotChecked=0, Total=3422 [2022-11-22 01:41:28,388 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 927 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 929 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:41:28,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [929 Valid, 937 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1088 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 01:41:28,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4284 states. [2022-11-22 01:41:28,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4284 to 3699. [2022-11-22 01:41:28,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3699 states, 3363 states have (on average 1.4174843889384479) internal successors, (4767), 3444 states have internal predecessors, (4767), 221 states have call successors, (221), 86 states have call predecessors, (221), 86 states have return successors, (221), 168 states have call predecessors, (221), 221 states have call successors, (221) [2022-11-22 01:41:28,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3699 states to 3699 states and 5209 transitions. [2022-11-22 01:41:28,458 INFO L78 Accepts]: Start accepts. Automaton has 3699 states and 5209 transitions. Word has length 41 [2022-11-22 01:41:28,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:41:28,459 INFO L495 AbstractCegarLoop]: Abstraction has 3699 states and 5209 transitions. [2022-11-22 01:41:28,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:41:28,459 INFO L276 IsEmpty]: Start isEmpty. Operand 3699 states and 5209 transitions. [2022-11-22 01:41:28,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-22 01:41:28,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:41:28,466 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:41:28,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-22 01:41:28,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-22 01:41:28,672 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:41:28,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:41:28,673 INFO L85 PathProgramCache]: Analyzing trace with hash 2086628751, now seen corresponding path program 1 times [2022-11-22 01:41:28,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:41:28,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822640475] [2022-11-22 01:41:28,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:41:28,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:41:28,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:41:29,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:41:29,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:41:29,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822640475] [2022-11-22 01:41:29,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822640475] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:41:29,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:41:29,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-22 01:41:29,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184772891] [2022-11-22 01:41:29,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:41:29,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 01:41:29,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:41:29,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 01:41:29,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-22 01:41:29,394 INFO L87 Difference]: Start difference. First operand 3699 states and 5209 transitions. Second operand has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 13 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 01:41:30,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:41:30,725 INFO L93 Difference]: Finished difference Result 5236 states and 7302 transitions. [2022-11-22 01:41:30,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-22 01:41:30,726 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 13 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2022-11-22 01:41:30,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:41:30,735 INFO L225 Difference]: With dead ends: 5236 [2022-11-22 01:41:30,735 INFO L226 Difference]: Without dead ends: 5236 [2022-11-22 01:41:30,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2022-11-22 01:41:30,736 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 843 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:41:30,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [843 Valid, 678 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 01:41:30,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5236 states. [2022-11-22 01:41:30,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5236 to 4743. [2022-11-22 01:41:30,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4743 states, 4321 states have (on average 1.4105531127053923) internal successors, (6095), 4413 states have internal predecessors, (6095), 285 states have call successors, (285), 108 states have call predecessors, (285), 108 states have return successors, (285), 221 states have call predecessors, (285), 285 states have call successors, (285) [2022-11-22 01:41:30,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4743 states to 4743 states and 6665 transitions. [2022-11-22 01:41:30,814 INFO L78 Accepts]: Start accepts. Automaton has 4743 states and 6665 transitions. Word has length 41 [2022-11-22 01:41:30,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:41:30,814 INFO L495 AbstractCegarLoop]: Abstraction has 4743 states and 6665 transitions. [2022-11-22 01:41:30,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 13 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 01:41:30,815 INFO L276 IsEmpty]: Start isEmpty. Operand 4743 states and 6665 transitions. [2022-11-22 01:41:30,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-22 01:41:30,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:41:30,816 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:41:30,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-11-22 01:41:30,816 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:41:30,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:41:30,817 INFO L85 PathProgramCache]: Analyzing trace with hash 261777103, now seen corresponding path program 1 times [2022-11-22 01:41:30,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:41:30,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060776694] [2022-11-22 01:41:30,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:41:30,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:41:30,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:41:33,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:41:33,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:41:33,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060776694] [2022-11-22 01:41:33,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060776694] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:41:33,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435764094] [2022-11-22 01:41:33,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:41:33,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:41:33,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:41:33,229 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:41:33,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-22 01:41:33,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:41:33,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-22 01:41:33,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:41:33,818 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 11 [2022-11-22 01:41:33,829 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 11 [2022-11-22 01:41:33,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:33,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-22 01:41:33,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:33,976 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 27 treesize of output 26 [2022-11-22 01:41:34,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:34,322 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 34 treesize of output 10 [2022-11-22 01:41:34,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:34,327 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 37 treesize of output 13 [2022-11-22 01:41:34,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:41:34,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:41:34,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:34,824 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:41:34,825 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 1 case distinctions, treesize of input 477 treesize of output 413 [2022-11-22 01:41:34,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:34,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:34,939 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 311 treesize of output 247 [2022-11-22 01:41:35,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:41:35,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435764094] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:41:35,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [248661573] [2022-11-22 01:41:35,349 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2022-11-22 01:41:35,349 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:41:35,350 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:41:35,350 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:41:35,350 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:41:35,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:35,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 38 [2022-11-22 01:41:35,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,574 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 38 treesize of output 21 [2022-11-22 01:41:35,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:35,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,591 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 43 treesize of output 41 [2022-11-22 01:41:35,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:35,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,622 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 43 treesize of output 41 [2022-11-22 01:41:35,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-11-22 01:41:35,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-11-22 01:41:35,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,720 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 38 treesize of output 21 [2022-11-22 01:41:35,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,770 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 28 treesize of output 30 [2022-11-22 01:41:35,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,807 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 55 [2022-11-22 01:41:35,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,835 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 55 [2022-11-22 01:41:35,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-11-22 01:41:35,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,936 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-22 01:41:35,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:35,965 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-22 01:41:36,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:36,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:36,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:36,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-11-22 01:41:36,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:36,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:36,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:36,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:36,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:36,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:36,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 72 [2022-11-22 01:41:36,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:36,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:36,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:36,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:36,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:36,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:36,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 72 [2022-11-22 01:41:36,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:36,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:36,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:36,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:36,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:36,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 36 [2022-11-22 01:41:36,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:36,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:36,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:36,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:36,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:36,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 36 [2022-11-22 01:41:36,591 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:41:36,591 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 [2022-11-22 01:41:36,603 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 17 treesize of output 19 [2022-11-22 01:41:36,669 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 27 treesize of output 26 [2022-11-22 01:41:36,693 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 27 treesize of output 26 [2022-11-22 01:41:36,706 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 23 treesize of output 1 [2022-11-22 01:41:36,751 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-22 01:41:36,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 48 [2022-11-22 01:41:36,788 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-22 01:41:36,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 48 [2022-11-22 01:41:36,813 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 23 treesize of output 1 [2022-11-22 01:41:36,892 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-22 01:41:36,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 75 [2022-11-22 01:41:36,987 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-22 01:41:36,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 75 [2022-11-22 01:41:37,021 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 13 treesize of output 9 [2022-11-22 01:41:38,493 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 11 [2022-11-22 01:41:38,511 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 23 treesize of output 1 [2022-11-22 01:41:39,011 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 11 [2022-11-22 01:41:39,823 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 27 treesize of output 15 [2022-11-22 01:41:39,833 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 23 treesize of output 1 [2022-11-22 01:41:39,853 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 27 treesize of output 15 [2022-11-22 01:41:40,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:40,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:40,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-22 01:41:40,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:40,083 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:41:40,083 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 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 21 [2022-11-22 01:41:40,213 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 23 treesize of output 1 [2022-11-22 01:41:40,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:40,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:40,230 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 49 treesize of output 43 [2022-11-22 01:41:40,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:40,254 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 27 treesize of output 26 [2022-11-22 01:41:40,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:40,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:40,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:40,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:40,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 57 [2022-11-22 01:41:40,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:40,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:40,339 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-22 01:41:40,339 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 2 case distinctions, treesize of input 38 treesize of output 44 [2022-11-22 01:41:40,364 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 23 treesize of output 1 [2022-11-22 01:41:40,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:40,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:40,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:40,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:40,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:40,412 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 60 [2022-11-22 01:41:40,438 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 [2022-11-22 01:41:40,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:40,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:40,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:40,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:40,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:40,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:40,475 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 01:41:40,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 47 [2022-11-22 01:41:40,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:40,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:40,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:40,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:40,631 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 71 treesize of output 60 [2022-11-22 01:41:40,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:40,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:40,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:40,695 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-22 01:41:40,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 54 [2022-11-22 01:41:40,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:40,720 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 33 treesize of output 13 [2022-11-22 01:41:40,863 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 27 treesize of output 15 [2022-11-22 01:41:40,874 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 27 treesize of output 15 [2022-11-22 01:41:40,885 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 23 treesize of output 1 [2022-11-22 01:41:41,587 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:41:41,587 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 17 treesize of output 23 [2022-11-22 01:41:41,622 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:41:41,623 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 [2022-11-22 01:41:41,702 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 27 treesize of output 26 [2022-11-22 01:41:41,717 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 23 treesize of output 1 [2022-11-22 01:41:41,729 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 27 treesize of output 26 [2022-11-22 01:41:41,791 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-22 01:41:41,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 48 [2022-11-22 01:41:41,848 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-22 01:41:41,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 48 [2022-11-22 01:41:41,868 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 23 treesize of output 1 [2022-11-22 01:41:41,951 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 [2022-11-22 01:41:41,967 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 [2022-11-22 01:41:41,977 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 [2022-11-22 01:41:42,048 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:41:42,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2022-11-22 01:41:42,068 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 11 [2022-11-22 01:41:42,089 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 11 [2022-11-22 01:41:42,248 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 20 for LOIs [2022-11-22 01:41:42,250 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:41:55,759 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '117490#(and (<= (+ |ULTIMATE.start_remove_one_~item~2#1.offset| (* |ULTIMATE.start_remove_one_~next_field~0#1| 4) 4) (select |#length| |ULTIMATE.start_remove_one_~item~2#1.base|)) (<= |~#list~0.base| 3) (= |ULTIMATE.start_is_empty_~no_end~0#1| |ULTIMATE.start_is_empty_~no_beg~0#1|) (<= 0 |#NULL.base|) (= |ULTIMATE.start_is_empty_~no_beg~0#1| (ite (and (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_is_empty_~list#1.base|) (+ |ULTIMATE.start_is_empty_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_is_empty_~list#1.base|) (+ |ULTIMATE.start_is_empty_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) 0)) 1 0)) (= |ULTIMATE.start_is_empty_~list#1.base| |ULTIMATE.start_is_empty_#in~list#1.base|) (= |ULTIMATE.start_remove_one_~list#1.offset| |ULTIMATE.start_is_empty_#in~list#1.offset|) (<= ~i~0 0) (<= |ULTIMATE.start_main_~z~0#1| 0) (= |ULTIMATE.start_remove_one_~item~2#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_one_~list#1.base|) (+ |ULTIMATE.start_remove_one_~list#1.offset| (* |ULTIMATE.start_remove_one_~from#1| 4)))) (= |ULTIMATE.start_remove_one_#in~list#1.base| |ULTIMATE.start_remove_one_~list#1.base|) (= |ULTIMATE.start_is_empty_~no_end~0#1| (ite (and (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_is_empty_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset|)) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_is_empty_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset|)) 0)) 1 0)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_one_~item~2#1.base|) (+ |ULTIMATE.start_remove_one_~item~2#1.offset| (* |ULTIMATE.start_remove_one_~next_field~0#1| 4))) |ULTIMATE.start_remove_one_~next~0#1.offset|) (= |ULTIMATE.start_remove_one_~next~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_one_~item~2#1.base|) (+ |ULTIMATE.start_remove_one_~item~2#1.offset| (* |ULTIMATE.start_remove_one_~next_field~0#1| 4)))) (<= 0 ~i~0) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_main_#t~ret27#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (or (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_one_~list#1.base|) (+ |ULTIMATE.start_remove_one_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_one_~list#1.base|) (+ |ULTIMATE.start_remove_one_~list#1.offset| (* ~unnamed1~0~LIST_END 4))))) (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_one_~list#1.base|) (+ |ULTIMATE.start_remove_one_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_one_~list#1.base|) (+ |ULTIMATE.start_remove_one_~list#1.offset| (* ~unnamed1~0~LIST_END 4)))))) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_one_~list#1.base|) (+ |ULTIMATE.start_remove_one_~list#1.offset| (* |ULTIMATE.start_remove_one_~from#1| 4))) |ULTIMATE.start_remove_one_~item~2#1.base|) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_remove_one_~from#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start_remove_one_#in~list#1.base| |~#list~0.base|) (<= 0 |ULTIMATE.start_main_~length~0#1|) (<= (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset| 4) (select |#length| |ULTIMATE.start_is_empty_~list#1.base|)) (= (select |#valid| |ULTIMATE.start_remove_one_~item~2#1.base|) 1) (= |ULTIMATE.start_is_empty_~no_beg~0#1| |ULTIMATE.start_is_empty_#res#1|) (not (= (select |#valid| |ULTIMATE.start_remove_one_~next~0#1.base|) 1)) (<= 0 (+ |ULTIMATE.start_remove_one_~item~2#1.offset| (* |ULTIMATE.start_remove_one_~next_field~0#1| 4))) (= (ite (= ~unnamed1~0~LIST_END |ULTIMATE.start_remove_one_~from#1|) ~unnamed2~0~ITEM_NEXT ~unnamed2~0~ITEM_PREV) |ULTIMATE.start_remove_one_~term_field~1#1|) (<= |#NULL.base| 0) (= |~#list~0.offset| |ULTIMATE.start_remove_one_#in~list#1.offset|) (= |ULTIMATE.start_is_empty_~list#1.offset| |ULTIMATE.start_is_empty_#in~list#1.offset|) (= |ULTIMATE.start_is_empty_#in~list#1.base| |ULTIMATE.start_remove_one_~list#1.base|) (<= 3 |~#list~0.base|) (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_#t~ret27#1|) (= (select |#valid| |ULTIMATE.start_is_empty_~list#1.base|) 1) (<= 0 |#NULL.offset|) (<= 0 (+ |ULTIMATE.start_remove_one_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) (= |ULTIMATE.start_remove_one_~list#1.offset| |ULTIMATE.start_remove_one_#in~list#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |~#list~0.offset| 0) (<= 0 |ULTIMATE.start_main_~z~0#1|) (= (ite (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_remove_one_~from#1|) ~unnamed2~0~ITEM_NEXT ~unnamed2~0~ITEM_PREV) |ULTIMATE.start_remove_one_~next_field~0#1|))' at error location [2022-11-22 01:41:55,759 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:41:55,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:41:55,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13, 10] total 39 [2022-11-22 01:41:55,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058846815] [2022-11-22 01:41:55,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:41:55,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-22 01:41:55,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:41:55,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-22 01:41:55,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=5004, Unknown=0, NotChecked=0, Total=5402 [2022-11-22 01:41:55,761 INFO L87 Difference]: Start difference. First operand 4743 states and 6665 transitions. Second operand has 39 states, 37 states have (on average 2.864864864864865) internal successors, (106), 37 states have internal predecessors, (106), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-22 01:42:04,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:42:04,623 INFO L93 Difference]: Finished difference Result 7227 states and 10046 transitions. [2022-11-22 01:42:04,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-22 01:42:04,623 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.864864864864865) internal successors, (106), 37 states have internal predecessors, (106), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 42 [2022-11-22 01:42:04,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:42:04,633 INFO L225 Difference]: With dead ends: 7227 [2022-11-22 01:42:04,633 INFO L226 Difference]: Without dead ends: 7227 [2022-11-22 01:42:04,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=1599, Invalid=13901, Unknown=0, NotChecked=0, Total=15500 [2022-11-22 01:42:04,636 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 2974 mSDsluCounter, 2463 mSDsCounter, 0 mSdLazyCounter, 2712 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2976 SdHoareTripleChecker+Valid, 2603 SdHoareTripleChecker+Invalid, 3020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 2712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:42:04,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2976 Valid, 2603 Invalid, 3020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 2712 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-22 01:42:04,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7227 states. [2022-11-22 01:42:04,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7227 to 5076. [2022-11-22 01:42:04,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5076 states, 4614 states have (on average 1.410056350238405) internal successors, (6506), 4722 states have internal predecessors, (6506), 317 states have call successors, (317), 116 states have call predecessors, (317), 116 states have return successors, (317), 237 states have call predecessors, (317), 317 states have call successors, (317) [2022-11-22 01:42:04,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5076 states to 5076 states and 7140 transitions. [2022-11-22 01:42:04,737 INFO L78 Accepts]: Start accepts. Automaton has 5076 states and 7140 transitions. Word has length 42 [2022-11-22 01:42:04,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:42:04,737 INFO L495 AbstractCegarLoop]: Abstraction has 5076 states and 7140 transitions. [2022-11-22 01:42:04,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.864864864864865) internal successors, (106), 37 states have internal predecessors, (106), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-22 01:42:04,738 INFO L276 IsEmpty]: Start isEmpty. Operand 5076 states and 7140 transitions. [2022-11-22 01:42:04,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-22 01:42:04,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:42:04,739 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:42:04,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-22 01:42:04,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-22 01:42:04,945 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:42:04,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:42:04,946 INFO L85 PathProgramCache]: Analyzing trace with hash 260982050, now seen corresponding path program 1 times [2022-11-22 01:42:04,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:42:04,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815936543] [2022-11-22 01:42:04,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:42:04,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:42:04,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:42:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:42:05,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:42:05,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815936543] [2022-11-22 01:42:05,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815936543] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:42:05,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:42:05,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-22 01:42:05,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047539950] [2022-11-22 01:42:05,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:42:05,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 01:42:05,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:42:05,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 01:42:05,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-22 01:42:05,547 INFO L87 Difference]: Start difference. First operand 5076 states and 7140 transitions. Second operand has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:42:07,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:42:07,094 INFO L93 Difference]: Finished difference Result 5798 states and 8032 transitions. [2022-11-22 01:42:07,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-22 01:42:07,094 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 42 [2022-11-22 01:42:07,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:42:07,102 INFO L225 Difference]: With dead ends: 5798 [2022-11-22 01:42:07,102 INFO L226 Difference]: Without dead ends: 5798 [2022-11-22 01:42:07,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2022-11-22 01:42:07,104 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 653 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:42:07,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [653 Valid, 838 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:42:07,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5798 states. [2022-11-22 01:42:07,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5798 to 5076. [2022-11-22 01:42:07,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5076 states, 4614 states have (on average 1.405504984828782) internal successors, (6485), 4722 states have internal predecessors, (6485), 317 states have call successors, (317), 116 states have call predecessors, (317), 116 states have return successors, (317), 237 states have call predecessors, (317), 317 states have call successors, (317) [2022-11-22 01:42:07,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5076 states to 5076 states and 7119 transitions. [2022-11-22 01:42:07,189 INFO L78 Accepts]: Start accepts. Automaton has 5076 states and 7119 transitions. Word has length 42 [2022-11-22 01:42:07,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:42:07,189 INFO L495 AbstractCegarLoop]: Abstraction has 5076 states and 7119 transitions. [2022-11-22 01:42:07,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:42:07,189 INFO L276 IsEmpty]: Start isEmpty. Operand 5076 states and 7119 transitions. [2022-11-22 01:42:07,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-22 01:42:07,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:42:07,191 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:42:07,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-11-22 01:42:07,191 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:42:07,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:42:07,191 INFO L85 PathProgramCache]: Analyzing trace with hash -499490831, now seen corresponding path program 1 times [2022-11-22 01:42:07,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:42:07,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008658253] [2022-11-22 01:42:07,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:42:07,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:42:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:42:07,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:42:07,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:42:07,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008658253] [2022-11-22 01:42:07,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008658253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:42:07,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:42:07,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-22 01:42:07,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418536557] [2022-11-22 01:42:07,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:42:07,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 01:42:07,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:42:07,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 01:42:07,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-22 01:42:07,768 INFO L87 Difference]: Start difference. First operand 5076 states and 7119 transitions. Second operand has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 13 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:42:09,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:42:09,039 INFO L93 Difference]: Finished difference Result 5720 states and 7907 transitions. [2022-11-22 01:42:09,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-22 01:42:09,040 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 13 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2022-11-22 01:42:09,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:42:09,047 INFO L225 Difference]: With dead ends: 5720 [2022-11-22 01:42:09,047 INFO L226 Difference]: Without dead ends: 5720 [2022-11-22 01:42:09,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2022-11-22 01:42:09,048 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 593 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:42:09,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [595 Valid, 894 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:42:09,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5720 states. [2022-11-22 01:42:09,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5720 to 5231. [2022-11-22 01:42:09,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5231 states, 4769 states have (on average 1.3965191864122457) internal successors, (6660), 4877 states have internal predecessors, (6660), 317 states have call successors, (317), 116 states have call predecessors, (317), 116 states have return successors, (317), 237 states have call predecessors, (317), 317 states have call successors, (317) [2022-11-22 01:42:09,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5231 states to 5231 states and 7294 transitions. [2022-11-22 01:42:09,133 INFO L78 Accepts]: Start accepts. Automaton has 5231 states and 7294 transitions. Word has length 43 [2022-11-22 01:42:09,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:42:09,134 INFO L495 AbstractCegarLoop]: Abstraction has 5231 states and 7294 transitions. [2022-11-22 01:42:09,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 13 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:42:09,134 INFO L276 IsEmpty]: Start isEmpty. Operand 5231 states and 7294 transitions. [2022-11-22 01:42:09,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-22 01:42:09,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:42:09,135 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 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, 1, 1] [2022-11-22 01:42:09,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-11-22 01:42:09,135 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:42:09,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:42:09,136 INFO L85 PathProgramCache]: Analyzing trace with hash -27099674, now seen corresponding path program 1 times [2022-11-22 01:42:09,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:42:09,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958469424] [2022-11-22 01:42:09,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:42:09,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:42:09,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:42:09,227 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:42:09,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:42:09,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958469424] [2022-11-22 01:42:09,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958469424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:42:09,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:42:09,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:42:09,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959403201] [2022-11-22 01:42:09,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:42:09,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:42:09,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:42:09,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:42:09,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:42:09,229 INFO L87 Difference]: Start difference. First operand 5231 states and 7294 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:42:09,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:42:09,367 INFO L93 Difference]: Finished difference Result 4875 states and 6893 transitions. [2022-11-22 01:42:09,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:42:09,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-11-22 01:42:09,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:42:09,374 INFO L225 Difference]: With dead ends: 4875 [2022-11-22 01:42:09,374 INFO L226 Difference]: Without dead ends: 4875 [2022-11-22 01:42:09,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:42:09,375 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 97 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:42:09,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 332 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:42:09,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2022-11-22 01:42:09,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 3575. [2022-11-22 01:42:09,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3575 states, 3248 states have (on average 1.3934729064039408) internal successors, (4526), 3334 states have internal predecessors, (4526), 219 states have call successors, (219), 79 states have call predecessors, (219), 79 states have return successors, (219), 161 states have call predecessors, (219), 219 states have call successors, (219) [2022-11-22 01:42:09,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3575 states to 3575 states and 4964 transitions. [2022-11-22 01:42:09,451 INFO L78 Accepts]: Start accepts. Automaton has 3575 states and 4964 transitions. Word has length 43 [2022-11-22 01:42:09,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:42:09,452 INFO L495 AbstractCegarLoop]: Abstraction has 3575 states and 4964 transitions. [2022-11-22 01:42:09,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:42:09,452 INFO L276 IsEmpty]: Start isEmpty. Operand 3575 states and 4964 transitions. [2022-11-22 01:42:09,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 01:42:09,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:42:09,453 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:42:09,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-11-22 01:42:09,454 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:42:09,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:42:09,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1695653636, now seen corresponding path program 1 times [2022-11-22 01:42:09,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:42:09,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550343438] [2022-11-22 01:42:09,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:42:09,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:42:09,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:42:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:42:10,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:42:10,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550343438] [2022-11-22 01:42:10,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550343438] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:42:10,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:42:10,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-22 01:42:10,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053479376] [2022-11-22 01:42:10,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:42:10,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-22 01:42:10,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:42:10,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-22 01:42:10,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-11-22 01:42:10,202 INFO L87 Difference]: Start difference. First operand 3575 states and 4964 transitions. Second operand has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:42:13,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:42:13,561 INFO L93 Difference]: Finished difference Result 4995 states and 6733 transitions. [2022-11-22 01:42:13,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-22 01:42:13,562 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-11-22 01:42:13,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:42:13,568 INFO L225 Difference]: With dead ends: 4995 [2022-11-22 01:42:13,568 INFO L226 Difference]: Without dead ends: 4995 [2022-11-22 01:42:13,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=672, Invalid=2084, Unknown=0, NotChecked=0, Total=2756 [2022-11-22 01:42:13,569 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 1230 mSDsluCounter, 1142 mSDsCounter, 0 mSdLazyCounter, 2121 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1230 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 2243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 2121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:42:13,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1230 Valid, 1358 Invalid, 2243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 2121 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-22 01:42:13,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4995 states. [2022-11-22 01:42:13,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4995 to 4047. [2022-11-22 01:42:13,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4047 states, 3692 states have (on average 1.3607800650054171) internal successors, (5024), 3774 states have internal predecessors, (5024), 243 states have call successors, (243), 87 states have call predecessors, (243), 87 states have return successors, (243), 185 states have call predecessors, (243), 243 states have call successors, (243) [2022-11-22 01:42:13,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4047 states to 4047 states and 5510 transitions. [2022-11-22 01:42:13,638 INFO L78 Accepts]: Start accepts. Automaton has 4047 states and 5510 transitions. Word has length 44 [2022-11-22 01:42:13,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:42:13,638 INFO L495 AbstractCegarLoop]: Abstraction has 4047 states and 5510 transitions. [2022-11-22 01:42:13,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:42:13,639 INFO L276 IsEmpty]: Start isEmpty. Operand 4047 states and 5510 transitions. [2022-11-22 01:42:13,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 01:42:13,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:42:13,640 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 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, 1, 1, 1] [2022-11-22 01:42:13,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-11-22 01:42:13,640 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:42:13,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:42:13,641 INFO L85 PathProgramCache]: Analyzing trace with hash 201576609, now seen corresponding path program 1 times [2022-11-22 01:42:13,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:42:13,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609982626] [2022-11-22 01:42:13,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:42:13,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:42:13,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:42:13,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:42:13,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:42:13,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609982626] [2022-11-22 01:42:13,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609982626] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:42:13,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558075663] [2022-11-22 01:42:13,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:42:13,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:42:13,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:42:13,767 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:42:13,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-22 01:42:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:42:13,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 01:42:13,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:42:14,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:14,334 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 17 treesize of output 7 [2022-11-22 01:42:14,434 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 01:42:14,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:42:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 01:42:14,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558075663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:42:14,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1676533522] [2022-11-22 01:42:14,579 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-22 01:42:14,579 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:42:14,579 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:42:14,579 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:42:14,579 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:42:15,377 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-22 01:42:15,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 49 [2022-11-22 01:42:15,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:15,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:15,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:15,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:15,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:15,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:15,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 71 [2022-11-22 01:42:15,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:15,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:15,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:15,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:15,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:15,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:15,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 83 [2022-11-22 01:42:15,494 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 [2022-11-22 01:42:15,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:42:15,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:42:15,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:42:17,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:17,140 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-22 01:42:17,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 507 treesize of output 507 [2022-11-22 01:42:17,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:42:17,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:17,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:17,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:17,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:17,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:17,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:17,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:17,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 475 treesize of output 394 [2022-11-22 01:42:17,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:17,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:17,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:17,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:17,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:17,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:17,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:17,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 415 treesize of output 350 [2022-11-22 01:42:17,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:42:17,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:42:17,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:42:18,825 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-22 01:42:18,825 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 45 treesize of output 49 [2022-11-22 01:42:18,876 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 [2022-11-22 01:42:18,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:18,890 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 25 treesize of output 17 [2022-11-22 01:42:18,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:18,904 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 53 treesize of output 29 [2022-11-22 01:42:18,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:42:19,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:42:19,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:42:19,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:42:19,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:42:19,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:42:20,424 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-22 01:42:20,424 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 45 treesize of output 49 [2022-11-22 01:42:20,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:20,485 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 28 treesize of output 16 [2022-11-22 01:42:20,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:20,498 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 56 treesize of output 28 [2022-11-22 01:42:20,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:42:20,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:42:20,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:42:20,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:42:20,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:42:20,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:42:20,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:42:21,640 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 15 for LOIs [2022-11-22 01:42:21,641 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:42:28,568 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '169721#(and (= |~#list~0.offset| 0) (= (select |#valid| |~#list~0.base|) 1) (= (select (select |#memory_$Pointer$.offset| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|)) |ULTIMATE.start_main_~cursor~0#1.offset|) (= 3 |~#list~0.base|) (<= 0 ~i~0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset| 4) (select |#length| |~#list~0.base|)) (= |ULTIMATE.start_main_~y~0#1| 0) (or (and (= ~unnamed2~0~ITEM_NEXT |ULTIMATE.start_main_~direction~0#1|) (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_~end_point~0#1|)) (and (= ~unnamed2~0~ITEM_PREV |ULTIMATE.start_main_~direction~0#1|) (= ~unnamed1~0~LIST_END |ULTIMATE.start_main_~end_point~0#1|))) (= |ULTIMATE.start_main_~z~0#1| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.base| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|)) |ULTIMATE.start_main_~cursor~0#1.base|) (= |ULTIMATE.start_main_~length~0#1| 0) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-22 01:42:28,568 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:42:28,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:42:28,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2022-11-22 01:42:28,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456442427] [2022-11-22 01:42:28,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:42:28,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-22 01:42:28,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:42:28,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-22 01:42:28,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1357, Unknown=0, NotChecked=0, Total=1560 [2022-11-22 01:42:28,570 INFO L87 Difference]: Start difference. First operand 4047 states and 5510 transitions. Second operand has 14 states, 14 states have (on average 7.857142857142857) internal successors, (110), 14 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 01:42:29,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:42:29,647 INFO L93 Difference]: Finished difference Result 5183 states and 7105 transitions. [2022-11-22 01:42:29,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-22 01:42:29,647 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.857142857142857) internal successors, (110), 14 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 44 [2022-11-22 01:42:29,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:42:29,654 INFO L225 Difference]: With dead ends: 5183 [2022-11-22 01:42:29,654 INFO L226 Difference]: Without dead ends: 5179 [2022-11-22 01:42:29,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 95 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=312, Invalid=2138, Unknown=0, NotChecked=0, Total=2450 [2022-11-22 01:42:29,655 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 439 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:42:29,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 728 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 01:42:29,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5179 states. [2022-11-22 01:42:29,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5179 to 4062. [2022-11-22 01:42:29,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4062 states, 3707 states have (on average 1.3587806851901807) internal successors, (5037), 3789 states have internal predecessors, (5037), 243 states have call successors, (243), 87 states have call predecessors, (243), 87 states have return successors, (243), 185 states have call predecessors, (243), 243 states have call successors, (243) [2022-11-22 01:42:29,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4062 states to 4062 states and 5523 transitions. [2022-11-22 01:42:29,724 INFO L78 Accepts]: Start accepts. Automaton has 4062 states and 5523 transitions. Word has length 44 [2022-11-22 01:42:29,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:42:29,725 INFO L495 AbstractCegarLoop]: Abstraction has 4062 states and 5523 transitions. [2022-11-22 01:42:29,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.857142857142857) internal successors, (110), 14 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 01:42:29,725 INFO L276 IsEmpty]: Start isEmpty. Operand 4062 states and 5523 transitions. [2022-11-22 01:42:29,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-22 01:42:29,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:42:29,726 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:42:29,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-22 01:42:29,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:42:29,932 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:42:29,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:42:29,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1025655379, now seen corresponding path program 1 times [2022-11-22 01:42:29,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:42:29,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157102696] [2022-11-22 01:42:29,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:42:29,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:42:29,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:42:30,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:42:30,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:42:30,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157102696] [2022-11-22 01:42:30,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157102696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:42:30,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:42:30,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 01:42:30,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372060987] [2022-11-22 01:42:30,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:42:30,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:42:30,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:42:30,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:42:30,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:42:30,147 INFO L87 Difference]: Start difference. First operand 4062 states and 5523 transitions. Second operand has 7 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 01:42:30,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:42:30,591 INFO L93 Difference]: Finished difference Result 5345 states and 7291 transitions. [2022-11-22 01:42:30,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:42:30,591 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2022-11-22 01:42:30,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:42:30,598 INFO L225 Difference]: With dead ends: 5345 [2022-11-22 01:42:30,598 INFO L226 Difference]: Without dead ends: 5345 [2022-11-22 01:42:30,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-11-22 01:42:30,599 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 633 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:42:30,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 286 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:42:30,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5345 states. [2022-11-22 01:42:30,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5345 to 4061. [2022-11-22 01:42:30,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4061 states, 3707 states have (on average 1.3571621257081197) internal successors, (5031), 3788 states have internal predecessors, (5031), 243 states have call successors, (243), 87 states have call predecessors, (243), 87 states have return successors, (243), 185 states have call predecessors, (243), 243 states have call successors, (243) [2022-11-22 01:42:30,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4061 states to 4061 states and 5517 transitions. [2022-11-22 01:42:30,667 INFO L78 Accepts]: Start accepts. Automaton has 4061 states and 5517 transitions. Word has length 45 [2022-11-22 01:42:30,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:42:30,668 INFO L495 AbstractCegarLoop]: Abstraction has 4061 states and 5517 transitions. [2022-11-22 01:42:30,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 01:42:30,668 INFO L276 IsEmpty]: Start isEmpty. Operand 4061 states and 5517 transitions. [2022-11-22 01:42:30,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-22 01:42:30,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:42:30,669 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:42:30,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-11-22 01:42:30,670 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:42:30,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:42:30,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1064260176, now seen corresponding path program 1 times [2022-11-22 01:42:30,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:42:30,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609149255] [2022-11-22 01:42:30,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:42:30,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:42:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:42:31,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:42:31,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:42:31,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609149255] [2022-11-22 01:42:31,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609149255] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:42:31,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:42:31,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-22 01:42:31,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558692321] [2022-11-22 01:42:31,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:42:31,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 01:42:31,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:42:31,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 01:42:31,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-22 01:42:31,391 INFO L87 Difference]: Start difference. First operand 4061 states and 5517 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:42:33,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:42:33,014 INFO L93 Difference]: Finished difference Result 4679 states and 6234 transitions. [2022-11-22 01:42:33,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-22 01:42:33,015 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2022-11-22 01:42:33,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:42:33,021 INFO L225 Difference]: With dead ends: 4679 [2022-11-22 01:42:33,021 INFO L226 Difference]: Without dead ends: 4679 [2022-11-22 01:42:33,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=397, Invalid=935, Unknown=0, NotChecked=0, Total=1332 [2022-11-22 01:42:33,022 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 830 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:42:33,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [830 Valid, 860 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 01:42:33,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4679 states. [2022-11-22 01:42:33,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4679 to 3366. [2022-11-22 01:42:33,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3366 states, 3045 states have (on average 1.3566502463054186) internal successors, (4131), 3120 states have internal predecessors, (4131), 211 states have call successors, (211), 86 states have call predecessors, (211), 86 states have return successors, (211), 159 states have call predecessors, (211), 211 states have call successors, (211) [2022-11-22 01:42:33,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3366 states to 3366 states and 4553 transitions. [2022-11-22 01:42:33,087 INFO L78 Accepts]: Start accepts. Automaton has 3366 states and 4553 transitions. Word has length 46 [2022-11-22 01:42:33,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:42:33,087 INFO L495 AbstractCegarLoop]: Abstraction has 3366 states and 4553 transitions. [2022-11-22 01:42:33,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:42:33,088 INFO L276 IsEmpty]: Start isEmpty. Operand 3366 states and 4553 transitions. [2022-11-22 01:42:33,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-22 01:42:33,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:42:33,089 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:42:33,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-11-22 01:42:33,089 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:42:33,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:42:33,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1210309745, now seen corresponding path program 1 times [2022-11-22 01:42:33,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:42:33,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011436370] [2022-11-22 01:42:33,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:42:33,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:42:33,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:42:33,256 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 01:42:33,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:42:33,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011436370] [2022-11-22 01:42:33,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011436370] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:42:33,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858239986] [2022-11-22 01:42:33,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:42:33,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:42:33,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:42:33,259 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:42:33,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-22 01:42:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:42:33,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-22 01:42:33,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:42:33,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:33,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:33,849 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-11-22 01:42:33,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:33,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:33,854 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 44 [2022-11-22 01:42:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 01:42:33,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:42:33,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858239986] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:42:33,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:42:33,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 13 [2022-11-22 01:42:33,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442760324] [2022-11-22 01:42:33,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:42:33,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 01:42:33,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:42:33,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 01:42:33,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-22 01:42:33,914 INFO L87 Difference]: Start difference. First operand 3366 states and 4553 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:42:34,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:42:34,575 INFO L93 Difference]: Finished difference Result 3010 states and 4053 transitions. [2022-11-22 01:42:34,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 01:42:34,575 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2022-11-22 01:42:34,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:42:34,579 INFO L225 Difference]: With dead ends: 3010 [2022-11-22 01:42:34,579 INFO L226 Difference]: Without dead ends: 3010 [2022-11-22 01:42:34,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-11-22 01:42:34,580 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 105 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:42:34,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 503 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:42:34,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3010 states. [2022-11-22 01:42:34,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3010 to 2949. [2022-11-22 01:42:34,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 2669 states have (on average 1.3525665043087298) internal successors, (3610), 2734 states have internal predecessors, (3610), 185 states have call successors, (185), 71 states have call predecessors, (185), 71 states have return successors, (185), 143 states have call predecessors, (185), 185 states have call successors, (185) [2022-11-22 01:42:34,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 3980 transitions. [2022-11-22 01:42:34,620 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 3980 transitions. Word has length 47 [2022-11-22 01:42:34,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:42:34,621 INFO L495 AbstractCegarLoop]: Abstraction has 2949 states and 3980 transitions. [2022-11-22 01:42:34,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:42:34,621 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 3980 transitions. [2022-11-22 01:42:34,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-22 01:42:34,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:42:34,622 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:42:34,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-22 01:42:34,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:42:34,828 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:42:34,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:42:34,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1123903815, now seen corresponding path program 1 times [2022-11-22 01:42:34,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:42:34,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396361563] [2022-11-22 01:42:34,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:42:34,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:42:34,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:42:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:42:37,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:42:37,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396361563] [2022-11-22 01:42:37,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396361563] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:42:37,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842792699] [2022-11-22 01:42:37,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:42:37,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:42:37,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:42:37,138 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:42:37,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-22 01:42:37,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:42:37,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-22 01:42:37,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:42:37,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:37,975 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 35 treesize of output 34 [2022-11-22 01:42:37,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:37,979 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 35 treesize of output 34 [2022-11-22 01:42:38,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:38,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:38,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:38,346 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:42:38,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 144 treesize of output 130 [2022-11-22 01:42:38,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:38,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:38,360 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:42:38,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 96 treesize of output 66 [2022-11-22 01:42:38,569 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:42:38,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:42:39,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:39,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:40,016 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:42:40,016 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 277 treesize of output 267 [2022-11-22 01:42:40,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:40,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:40,045 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:42:40,046 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 231 treesize of output 215 [2022-11-22 01:42:41,166 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:42:41,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842792699] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:42:41,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1715459147] [2022-11-22 01:42:41,168 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-22 01:42:41,169 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:42:41,169 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:42:41,169 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:42:41,169 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:42:41,745 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:42:41,745 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 [2022-11-22 01:42:41,757 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 17 treesize of output 19 [2022-11-22 01:42:41,833 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 23 treesize of output 1 [2022-11-22 01:42:41,845 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 27 treesize of output 26 [2022-11-22 01:42:41,858 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 27 treesize of output 26 [2022-11-22 01:42:41,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:41,890 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 38 treesize of output 40 [2022-11-22 01:42:41,911 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 23 treesize of output 1 [2022-11-22 01:42:41,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:41,929 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 38 treesize of output 40 [2022-11-22 01:42:41,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:41,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:41,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:41,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-22 01:42:42,014 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 13 treesize of output 9 [2022-11-22 01:42:42,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:42,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:42,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:42,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-22 01:42:42,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:42,097 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-22 01:42:42,120 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 33 treesize of output 13 [2022-11-22 01:42:42,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:42,138 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-22 01:42:42,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:42,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:42,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:42,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 74 [2022-11-22 01:42:42,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:42,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:42,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:42,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 66 [2022-11-22 01:42:42,309 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 33 treesize of output 13 [2022-11-22 01:42:43,169 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:42:43,169 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 17 treesize of output 23 [2022-11-22 01:42:43,203 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:42:43,204 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 [2022-11-22 01:42:43,271 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 27 treesize of output 26 [2022-11-22 01:42:43,290 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 23 treesize of output 1 [2022-11-22 01:42:43,304 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 27 treesize of output 26 [2022-11-22 01:42:43,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:43,332 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 38 treesize of output 40 [2022-11-22 01:42:43,347 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 23 treesize of output 1 [2022-11-22 01:42:43,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:43,361 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 38 treesize of output 40 [2022-11-22 01:42:43,406 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 [2022-11-22 01:42:43,417 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 [2022-11-22 01:42:43,428 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 [2022-11-22 01:42:43,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 01:42:43,493 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:42:43,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2022-11-22 01:42:43,511 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 11 [2022-11-22 01:42:43,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:43,574 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 47 treesize of output 27 [2022-11-22 01:42:43,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:43,618 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-22 01:42:43,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-22 01:42:43,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:43,661 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-22 01:42:43,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-22 01:42:44,337 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:42:44,337 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 17 treesize of output 23 [2022-11-22 01:42:44,368 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:42:44,368 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 [2022-11-22 01:42:44,437 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 23 treesize of output 1 [2022-11-22 01:42:44,450 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 27 treesize of output 26 [2022-11-22 01:42:44,472 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 27 treesize of output 26 [2022-11-22 01:42:44,502 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 23 treesize of output 1 [2022-11-22 01:42:44,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:44,522 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 38 treesize of output 40 [2022-11-22 01:42:44,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:44,541 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 38 treesize of output 40 [2022-11-22 01:42:44,570 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 [2022-11-22 01:42:44,578 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 [2022-11-22 01:42:44,586 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 [2022-11-22 01:42:44,618 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 11 [2022-11-22 01:42:44,631 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 11 [2022-11-22 01:42:44,674 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:42:44,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2022-11-22 01:42:44,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:44,786 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-22 01:42:44,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-22 01:42:44,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:44,830 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-22 01:42:44,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-22 01:42:44,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:44,856 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 47 treesize of output 27 [2022-11-22 01:42:45,705 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:42:45,705 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 [2022-11-22 01:42:45,719 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 17 treesize of output 19 [2022-11-22 01:42:45,826 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 27 treesize of output 26 [2022-11-22 01:42:45,846 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 27 treesize of output 26 [2022-11-22 01:42:45,860 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 23 treesize of output 1 [2022-11-22 01:42:46,020 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 27 for LOIs [2022-11-22 01:42:46,025 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:42:56,662 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '203006#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_is_empty_~no_beg~0#1| (ite (and (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_is_empty_~list#1.base|) (+ |ULTIMATE.start_is_empty_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_is_empty_~list#1.base|) (+ |ULTIMATE.start_is_empty_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) 0)) 1 0)) (= |ULTIMATE.start_is_empty_~list#1.base| |ULTIMATE.start_is_empty_#in~list#1.base|) (<= |ULTIMATE.start_main_~z~0#1| 0) (= |ULTIMATE.start_remove_one_#in~list#1.base| |ULTIMATE.start_remove_one_~list#1.base|) (= |ULTIMATE.start_is_empty_~no_end~0#1| (ite (and (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_is_empty_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset|)) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_is_empty_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset|)) 0)) 1 0)) (= 3 |~#list~0.base|) (<= 0 ~i~0) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_main_#t~ret27#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_remove_one_~from#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start_remove_one_#in~list#1.base| |~#list~0.base|) (or (< 10 ~i~0) (not (= |ULTIMATE.start_is_empty_~no_end~0#1| |ULTIMATE.start_is_empty_~no_beg~0#1|))) (<= 0 |ULTIMATE.start_main_~length~0#1|) (<= (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset| 4) (select |#length| |ULTIMATE.start_is_empty_~list#1.base|)) (<= |#NULL.base| 0) (= |~#list~0.offset| |ULTIMATE.start_remove_one_#in~list#1.offset|) (= |ULTIMATE.start_is_empty_~list#1.offset| |ULTIMATE.start_is_empty_#in~list#1.offset|) (= |ULTIMATE.start_is_empty_~list#1.offset| 0) (<= 0 |~#list~0.offset|) (= |ULTIMATE.start_is_empty_#in~list#1.base| |ULTIMATE.start_remove_one_~list#1.base|) (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_#t~ret27#1|) (= (select |#valid| |ULTIMATE.start_is_empty_~list#1.base|) 1) (<= 0 |#NULL.offset|) (= |ULTIMATE.start_remove_one_~list#1.offset| |ULTIMATE.start_remove_one_#in~list#1.offset|) (<= 0 |#StackHeapBarrier|) (not (< |ULTIMATE.start_is_empty_~list#1.base| |#StackHeapBarrier|)) (<= |~#list~0.offset| 0) (<= 0 |ULTIMATE.start_main_~z~0#1|))' at error location [2022-11-22 01:42:56,662 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:42:56,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:42:56,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 16] total 47 [2022-11-22 01:42:56,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907283205] [2022-11-22 01:42:56,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:42:56,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-22 01:42:56,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:42:56,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-22 01:42:56,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=4883, Unknown=0, NotChecked=0, Total=5256 [2022-11-22 01:42:56,664 INFO L87 Difference]: Start difference. First operand 2949 states and 3980 transitions. Second operand has 47 states, 46 states have (on average 2.891304347826087) internal successors, (133), 46 states have internal predecessors, (133), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-22 01:44:10,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:44:10,330 INFO L93 Difference]: Finished difference Result 15782 states and 20954 transitions. [2022-11-22 01:44:10,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 309 states. [2022-11-22 01:44:10,331 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.891304347826087) internal successors, (133), 46 states have internal predecessors, (133), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2022-11-22 01:44:10,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:44:10,346 INFO L225 Difference]: With dead ends: 15782 [2022-11-22 01:44:10,347 INFO L226 Difference]: Without dead ends: 15740 [2022-11-22 01:44:10,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 86 SyntacticMatches, 17 SemanticMatches, 370 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55544 ImplicationChecksByTransitivity, 73.9s TimeCoverageRelationStatistics Valid=19074, Invalid=118938, Unknown=0, NotChecked=0, Total=138012 [2022-11-22 01:44:10,353 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 12541 mSDsluCounter, 5740 mSDsCounter, 0 mSdLazyCounter, 8909 mSolverCounterSat, 2028 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12545 SdHoareTripleChecker+Valid, 5974 SdHoareTripleChecker+Invalid, 10937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2028 IncrementalHoareTripleChecker+Valid, 8909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:44:10,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12545 Valid, 5974 Invalid, 10937 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2028 Valid, 8909 Invalid, 0 Unknown, 0 Unchecked, 11.6s Time] [2022-11-22 01:44:10,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15740 states. [2022-11-22 01:44:10,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15740 to 7634. [2022-11-22 01:44:10,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7634 states, 6946 states have (on average 1.3528649582493522) internal successors, (9397), 7085 states have internal predecessors, (9397), 485 states have call successors, (485), 179 states have call predecessors, (485), 179 states have return successors, (485), 369 states have call predecessors, (485), 485 states have call successors, (485) [2022-11-22 01:44:10,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7634 states to 7634 states and 10367 transitions. [2022-11-22 01:44:10,548 INFO L78 Accepts]: Start accepts. Automaton has 7634 states and 10367 transitions. Word has length 50 [2022-11-22 01:44:10,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:44:10,549 INFO L495 AbstractCegarLoop]: Abstraction has 7634 states and 10367 transitions. [2022-11-22 01:44:10,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.891304347826087) internal successors, (133), 46 states have internal predecessors, (133), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-22 01:44:10,549 INFO L276 IsEmpty]: Start isEmpty. Operand 7634 states and 10367 transitions. [2022-11-22 01:44:10,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-22 01:44:10,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:44:10,552 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:44:10,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-22 01:44:10,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:44:10,759 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:44:10,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:44:10,759 INFO L85 PathProgramCache]: Analyzing trace with hash -622443914, now seen corresponding path program 1 times [2022-11-22 01:44:10,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:44:10,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009117404] [2022-11-22 01:44:10,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:44:10,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:44:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:44:12,508 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:44:12,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:44:12,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009117404] [2022-11-22 01:44:12,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009117404] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:44:12,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871613244] [2022-11-22 01:44:12,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:44:12,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:44:12,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:44:12,510 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:44:12,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-22 01:44:12,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:44:12,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-22 01:44:12,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:44:13,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 01:44:13,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:13,202 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 28 treesize of output 27 [2022-11-22 01:44:13,401 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 20 treesize of output 8 [2022-11-22 01:44:13,435 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:44:13,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:44:13,662 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 126 treesize of output 118 [2022-11-22 01:44:14,004 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:44:14,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871613244] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:44:14,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1507153389] [2022-11-22 01:44:14,006 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2022-11-22 01:44:14,006 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:44:14,006 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:44:14,006 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:44:14,007 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:44:14,639 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:44:14,639 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 [2022-11-22 01:44:14,650 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 17 treesize of output 19 [2022-11-22 01:44:14,726 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 27 treesize of output 26 [2022-11-22 01:44:14,742 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 23 treesize of output 1 [2022-11-22 01:44:14,753 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-22 01:44:14,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:14,784 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 38 treesize of output 40 [2022-11-22 01:44:14,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:14,801 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 38 treesize of output 40 [2022-11-22 01:44:14,824 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 23 treesize of output 1 [2022-11-22 01:44:14,863 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 13 treesize of output 9 [2022-11-22 01:44:14,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:14,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:14,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:14,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-22 01:44:14,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:14,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:14,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:14,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-22 01:44:14,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:14,961 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-22 01:44:14,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:14,989 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-22 01:44:15,008 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 33 treesize of output 13 [2022-11-22 01:44:15,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:15,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:44:15,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:15,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 74 [2022-11-22 01:44:15,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:15,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:44:15,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:15,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 66 [2022-11-22 01:44:15,173 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 33 treesize of output 13 [2022-11-22 01:44:16,242 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:44:16,242 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 [2022-11-22 01:44:16,284 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 17 treesize of output 19 [2022-11-22 01:44:16,377 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 23 treesize of output 1 [2022-11-22 01:44:16,396 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 27 treesize of output 26 [2022-11-22 01:44:16,412 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 27 treesize of output 26 [2022-11-22 01:44:16,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:16,461 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 38 treesize of output 40 [2022-11-22 01:44:16,476 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 23 treesize of output 1 [2022-11-22 01:44:16,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:16,500 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 38 treesize of output 40 [2022-11-22 01:44:16,549 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 [2022-11-22 01:44:16,557 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 [2022-11-22 01:44:16,570 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 [2022-11-22 01:44:16,597 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 11 [2022-11-22 01:44:16,608 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 11 [2022-11-22 01:44:16,648 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:44:16,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2022-11-22 01:44:16,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:16,728 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 47 treesize of output 27 [2022-11-22 01:44:16,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:16,769 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-22 01:44:16,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-22 01:44:16,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:16,812 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-22 01:44:16,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-22 01:44:17,561 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:44:17,562 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 17 treesize of output 23 [2022-11-22 01:44:17,592 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:44:17,592 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 [2022-11-22 01:44:17,660 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 27 treesize of output 26 [2022-11-22 01:44:17,682 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 23 treesize of output 1 [2022-11-22 01:44:17,693 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 27 treesize of output 26 [2022-11-22 01:44:17,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:17,724 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 38 treesize of output 40 [2022-11-22 01:44:17,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:17,749 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 38 treesize of output 40 [2022-11-22 01:44:17,766 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 23 treesize of output 1 [2022-11-22 01:44:17,792 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 01:44:17,803 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 [2022-11-22 01:44:17,813 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 [2022-11-22 01:44:17,868 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:44:17,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2022-11-22 01:44:17,886 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 11 [2022-11-22 01:44:17,898 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 11 [2022-11-22 01:44:17,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:18,010 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-22 01:44:18,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-22 01:44:18,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:18,042 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-22 01:44:18,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-22 01:44:18,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:18,067 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 47 treesize of output 27 [2022-11-22 01:44:18,867 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:44:18,868 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 17 treesize of output 23 [2022-11-22 01:44:18,906 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:44:18,906 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 [2022-11-22 01:44:19,004 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 23 treesize of output 1 [2022-11-22 01:44:19,024 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 27 treesize of output 26 [2022-11-22 01:44:19,037 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 27 treesize of output 26 [2022-11-22 01:44:19,064 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 18 for LOIs [2022-11-22 01:44:19,069 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:44:27,223 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '227402#(and (= |~#list~0.offset| 0) (= (select |#valid| |~#list~0.base|) 1) (= (select (select |#memory_$Pointer$.offset| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|)) |ULTIMATE.start_main_~cursor~0#1.offset|) (= 3 |~#list~0.base|) (<= 0 ~i~0) (<= (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset| 4) (select |#length| |~#list~0.base|)) (< 0 |ULTIMATE.start_main_~length~0#1|) (not (= (select |#valid| |ULTIMATE.start_main_~cursor~0#1.base|) 1)) (= |ULTIMATE.start_main_~y~0#1| 0) (or (and (= ~unnamed2~0~ITEM_NEXT |ULTIMATE.start_main_~direction~0#1|) (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_~end_point~0#1|)) (and (= ~unnamed2~0~ITEM_PREV |ULTIMATE.start_main_~direction~0#1|) (= ~unnamed1~0~LIST_END |ULTIMATE.start_main_~end_point~0#1|))) (= |ULTIMATE.start_main_~z~0#1| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.base| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|)) |ULTIMATE.start_main_~cursor~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 01:44:27,223 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:44:27,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:44:27,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 40 [2022-11-22 01:44:27,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634124801] [2022-11-22 01:44:27,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:44:27,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-22 01:44:27,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:44:27,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-22 01:44:27,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=3834, Unknown=0, NotChecked=0, Total=4160 [2022-11-22 01:44:27,226 INFO L87 Difference]: Start difference. First operand 7634 states and 10367 transitions. Second operand has 40 states, 36 states have (on average 2.9166666666666665) internal successors, (105), 35 states have internal predecessors, (105), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-22 01:44:31,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:44:31,315 INFO L93 Difference]: Finished difference Result 9155 states and 12518 transitions. [2022-11-22 01:44:31,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-22 01:44:31,316 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 36 states have (on average 2.9166666666666665) internal successors, (105), 35 states have internal predecessors, (105), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 53 [2022-11-22 01:44:31,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:44:31,325 INFO L225 Difference]: With dead ends: 9155 [2022-11-22 01:44:31,325 INFO L226 Difference]: Without dead ends: 9155 [2022-11-22 01:44:31,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 114 SyntacticMatches, 8 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2909 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=1113, Invalid=8199, Unknown=0, NotChecked=0, Total=9312 [2022-11-22 01:44:31,326 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 2118 mSDsluCounter, 1611 mSDsCounter, 0 mSdLazyCounter, 1742 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2118 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 1998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 1742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:44:31,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2118 Valid, 1726 Invalid, 1998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 1742 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-22 01:44:31,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9155 states. [2022-11-22 01:44:31,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9155 to 6555. [2022-11-22 01:44:31,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6555 states, 5977 states have (on average 1.3478333612180022) internal successors, (8056), 6089 states have internal predecessors, (8056), 409 states have call successors, (409), 145 states have call predecessors, (409), 145 states have return successors, (409), 320 states have call predecessors, (409), 409 states have call successors, (409) [2022-11-22 01:44:31,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6555 states to 6555 states and 8874 transitions. [2022-11-22 01:44:31,428 INFO L78 Accepts]: Start accepts. Automaton has 6555 states and 8874 transitions. Word has length 53 [2022-11-22 01:44:31,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:44:31,428 INFO L495 AbstractCegarLoop]: Abstraction has 6555 states and 8874 transitions. [2022-11-22 01:44:31,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 36 states have (on average 2.9166666666666665) internal successors, (105), 35 states have internal predecessors, (105), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-22 01:44:31,429 INFO L276 IsEmpty]: Start isEmpty. Operand 6555 states and 8874 transitions. [2022-11-22 01:44:31,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-22 01:44:31,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:44:31,430 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:44:31,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-22 01:44:31,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-11-22 01:44:31,636 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:44:31,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:44:31,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1099765272, now seen corresponding path program 1 times [2022-11-22 01:44:31,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:44:31,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148779405] [2022-11-22 01:44:31,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:44:31,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:44:31,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:44:33,894 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:44:33,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:44:33,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148779405] [2022-11-22 01:44:33,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148779405] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:44:33,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433542338] [2022-11-22 01:44:33,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:44:33,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:44:33,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:44:33,896 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:44:33,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-22 01:44:34,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:44:34,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-22 01:44:34,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:44:34,356 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 01:44:34,356 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 [2022-11-22 01:44:34,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 01:44:34,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:34,709 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 36 treesize of output 27 [2022-11-22 01:44:35,050 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:44:35,051 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 [2022-11-22 01:44:35,210 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2022-11-22 01:44:35,306 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2022-11-22 01:44:35,411 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2022-11-22 01:44:35,577 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-22 01:44:35,577 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 1 case distinctions, treesize of input 59 treesize of output 56 [2022-11-22 01:44:35,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:35,854 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 60 treesize of output 35 [2022-11-22 01:44:36,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:36,228 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:44:36,228 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 52 treesize of output 46 [2022-11-22 01:44:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:44:36,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:44:37,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433542338] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:44:37,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [721869194] [2022-11-22 01:44:37,895 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2022-11-22 01:44:37,895 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:44:37,896 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:44:37,896 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:44:37,896 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:44:38,483 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:44:38,483 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 17 treesize of output 23 [2022-11-22 01:44:38,519 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:44:38,519 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 [2022-11-22 01:44:38,590 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 23 treesize of output 1 [2022-11-22 01:44:38,606 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 27 treesize of output 26 [2022-11-22 01:44:38,621 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 27 treesize of output 26 [2022-11-22 01:44:38,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:38,650 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 38 treesize of output 40 [2022-11-22 01:44:38,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:38,666 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 38 treesize of output 40 [2022-11-22 01:44:38,683 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 23 treesize of output 1 [2022-11-22 01:44:38,721 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 13 treesize of output 9 [2022-11-22 01:44:38,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:38,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:38,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:38,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-22 01:44:38,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:38,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:38,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:38,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-22 01:44:38,845 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:44:38,845 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 1 case distinctions, treesize of input 33 treesize of output 27 [2022-11-22 01:44:38,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:38,924 INFO L321 Elim1Store]: treesize reduction 92, result has 38.7 percent of original size [2022-11-22 01:44:38,924 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 78 [2022-11-22 01:44:39,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:39,068 INFO L321 Elim1Store]: treesize reduction 100, result has 33.3 percent of original size [2022-11-22 01:44:39,069 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 70 [2022-11-22 01:44:39,111 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-22 01:44:39,153 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-22 01:44:39,268 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 11 [2022-11-22 01:44:39,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-22 01:44:39,293 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 11 [2022-11-22 01:44:39,378 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 23 treesize of output 1 [2022-11-22 01:44:39,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:39,433 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-22 01:44:39,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-22 01:44:39,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:39,477 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-22 01:44:39,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-22 01:44:40,262 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:44:40,263 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 [2022-11-22 01:44:40,275 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 17 treesize of output 19 [2022-11-22 01:44:40,382 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 27 treesize of output 26 [2022-11-22 01:44:40,397 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 23 treesize of output 1 [2022-11-22 01:44:40,410 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 27 treesize of output 26 [2022-11-22 01:44:40,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:40,457 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 38 treesize of output 40 [2022-11-22 01:44:40,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:40,486 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 38 treesize of output 40 [2022-11-22 01:44:40,509 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 23 treesize of output 1 [2022-11-22 01:44:40,548 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 [2022-11-22 01:44:40,559 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 19 treesize of output 1 [2022-11-22 01:44:40,567 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 [2022-11-22 01:44:40,593 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 11 [2022-11-22 01:44:40,632 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:44:40,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2022-11-22 01:44:40,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 01:44:40,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 01:44:40,696 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 23 treesize of output 1 [2022-11-22 01:44:40,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 01:44:40,763 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 23 treesize of output 1 [2022-11-22 01:44:40,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:40,809 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-22 01:44:40,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-22 01:44:40,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:40,841 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-22 01:44:40,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-22 01:44:41,504 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:44:41,505 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 17 treesize of output 23 [2022-11-22 01:44:41,537 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:44:41,537 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 [2022-11-22 01:44:41,609 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 23 treesize of output 1 [2022-11-22 01:44:41,620 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 27 treesize of output 26 [2022-11-22 01:44:41,640 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 27 treesize of output 26 [2022-11-22 01:44:41,666 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 23 treesize of output 1 [2022-11-22 01:44:41,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:41,681 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 38 treesize of output 40 [2022-11-22 01:44:41,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:41,697 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 38 treesize of output 40 [2022-11-22 01:44:41,730 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 [2022-11-22 01:44:41,742 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 [2022-11-22 01:44:41,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 01:44:41,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 01:44:41,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 01:44:41,829 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:44:41,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2022-11-22 01:44:41,891 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 23 treesize of output 1 [2022-11-22 01:44:41,901 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 11 [2022-11-22 01:44:41,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 01:44:41,971 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 23 treesize of output 1 [2022-11-22 01:44:41,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:42,006 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-22 01:44:42,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-22 01:44:42,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:42,046 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-22 01:44:42,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-22 01:44:42,751 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:44:42,751 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 17 treesize of output 23 [2022-11-22 01:44:42,783 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:44:42,784 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 [2022-11-22 01:44:42,882 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 23 treesize of output 1 [2022-11-22 01:44:42,900 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 27 treesize of output 26 [2022-11-22 01:44:42,917 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 27 treesize of output 26 [2022-11-22 01:44:42,934 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 15 for LOIs [2022-11-22 01:44:42,935 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:44:50,618 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '243498#(and (= |~#list~0.offset| 0) (= (select |#valid| |~#list~0.base|) 1) (= (select (select |#memory_$Pointer$.offset| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|)) |ULTIMATE.start_main_~cursor~0#1.offset|) (= 3 |~#list~0.base|) (<= 0 ~i~0) (<= (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset| 4) (select |#length| |~#list~0.base|)) (< 0 |ULTIMATE.start_main_~length~0#1|) (not (= (select |#valid| |ULTIMATE.start_main_~cursor~0#1.base|) 1)) (= |ULTIMATE.start_main_~y~0#1| 0) (or (and (= ~unnamed2~0~ITEM_NEXT |ULTIMATE.start_main_~direction~0#1|) (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_~end_point~0#1|)) (and (= ~unnamed2~0~ITEM_PREV |ULTIMATE.start_main_~direction~0#1|) (= ~unnamed1~0~LIST_END |ULTIMATE.start_main_~end_point~0#1|))) (= |ULTIMATE.start_main_~z~0#1| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.base| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|)) |ULTIMATE.start_main_~cursor~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 01:44:50,618 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:44:50,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:44:50,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 40 [2022-11-22 01:44:50,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403545157] [2022-11-22 01:44:50,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:44:50,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-22 01:44:50,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:44:50,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-22 01:44:50,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=5351, Unknown=1, NotChecked=0, Total=5852 [2022-11-22 01:44:50,620 INFO L87 Difference]: Start difference. First operand 6555 states and 8874 transitions. Second operand has 41 states, 37 states have (on average 2.675675675675676) internal successors, (99), 36 states have internal predecessors, (99), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 01:44:57,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:44:57,938 INFO L93 Difference]: Finished difference Result 8792 states and 11666 transitions. [2022-11-22 01:44:57,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-22 01:44:57,939 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 37 states have (on average 2.675675675675676) internal successors, (99), 36 states have internal predecessors, (99), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 54 [2022-11-22 01:44:57,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:44:57,948 INFO L225 Difference]: With dead ends: 8792 [2022-11-22 01:44:57,948 INFO L226 Difference]: Without dead ends: 8792 [2022-11-22 01:44:57,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5399 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=1924, Invalid=14845, Unknown=1, NotChecked=0, Total=16770 [2022-11-22 01:44:57,949 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 2860 mSDsluCounter, 1627 mSDsCounter, 0 mSdLazyCounter, 2854 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2862 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 3135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 2854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:44:57,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2862 Valid, 1759 Invalid, 3135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 2854 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-22 01:44:57,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8792 states. [2022-11-22 01:44:58,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8792 to 6770. [2022-11-22 01:44:58,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6770 states, 6145 states have (on average 1.3345809601301872) internal successors, (8201), 6288 states have internal predecessors, (8201), 441 states have call successors, (441), 161 states have call predecessors, (441), 161 states have return successors, (441), 320 states have call predecessors, (441), 441 states have call successors, (441) [2022-11-22 01:44:58,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6770 states to 6770 states and 9083 transitions. [2022-11-22 01:44:58,045 INFO L78 Accepts]: Start accepts. Automaton has 6770 states and 9083 transitions. Word has length 54 [2022-11-22 01:44:58,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:44:58,045 INFO L495 AbstractCegarLoop]: Abstraction has 6770 states and 9083 transitions. [2022-11-22 01:44:58,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 37 states have (on average 2.675675675675676) internal successors, (99), 36 states have internal predecessors, (99), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 01:44:58,046 INFO L276 IsEmpty]: Start isEmpty. Operand 6770 states and 9083 transitions. [2022-11-22 01:44:58,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-22 01:44:58,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:44:58,047 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:44:58,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-22 01:44:58,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:44:58,254 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:44:58,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:44:58,255 INFO L85 PathProgramCache]: Analyzing trace with hash 312503794, now seen corresponding path program 1 times [2022-11-22 01:44:58,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:44:58,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663391195] [2022-11-22 01:44:58,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:44:58,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:44:58,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:45:01,318 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:45:01,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:45:01,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663391195] [2022-11-22 01:45:01,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663391195] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:45:01,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043905357] [2022-11-22 01:45:01,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:45:01,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:45:01,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:45:01,320 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:45:01,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-22 01:45:01,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:45:01,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-22 01:45:01,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:45:01,883 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 01:45:01,884 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 [2022-11-22 01:45:02,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 01:45:02,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:45:02,356 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 47 treesize of output 30 [2022-11-22 01:45:02,831 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 01:45:02,831 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 [2022-11-22 01:45:02,996 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 54 [2022-11-22 01:45:03,107 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 54 [2022-11-22 01:45:03,217 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 54 [2022-11-22 01:45:03,406 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-22 01:45:03,406 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 1 case distinctions, treesize of input 57 treesize of output 54 [2022-11-22 01:45:03,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:45:03,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:45:03,648 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 58 treesize of output 33 [2022-11-22 01:45:04,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:45:04,158 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:45:04,159 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 48 treesize of output 42 [2022-11-22 01:45:04,256 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:45:04,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:45:05,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043905357] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:45:05,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1996843934] [2022-11-22 01:45:05,890 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-22 01:45:05,890 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:45:05,890 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:45:05,891 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:45:05,891 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:45:06,487 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:45:06,487 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 [2022-11-22 01:45:06,499 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 17 treesize of output 19 [2022-11-22 01:45:06,574 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 27 treesize of output 26 [2022-11-22 01:45:06,585 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 23 treesize of output 1 [2022-11-22 01:45:06,602 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 27 treesize of output 26 [2022-11-22 01:45:06,634 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 23 treesize of output 1 [2022-11-22 01:45:06,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:45:06,647 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 38 treesize of output 40 [2022-11-22 01:45:06,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:45:06,672 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 38 treesize of output 40 [2022-11-22 01:45:06,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:45:06,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:45:06,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:45:06,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-22 01:45:06,735 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 13 treesize of output 9 [2022-11-22 01:45:06,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:45:06,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:45:06,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:45:06,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-22 01:45:06,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:45:06,870 INFO L321 Elim1Store]: treesize reduction 92, result has 38.7 percent of original size [2022-11-22 01:45:06,870 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 78 [2022-11-22 01:45:06,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:45:06,961 INFO L321 Elim1Store]: treesize reduction 100, result has 33.3 percent of original size [2022-11-22 01:45:06,962 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 70 [2022-11-22 01:45:07,011 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:45:07,011 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 1 case distinctions, treesize of input 33 treesize of output 27 [2022-11-22 01:45:07,037 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-22 01:45:07,072 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-22 01:45:07,131 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 11 [2022-11-22 01:45:07,141 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 23 treesize of output 1 [2022-11-22 01:45:07,153 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 11 [2022-11-22 01:45:07,201 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 23 treesize of output 1 [2022-11-22 01:45:07,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:45:07,255 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-22 01:45:07,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-22 01:45:07,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:45:07,290 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-22 01:45:07,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-22 01:45:08,077 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:45:08,077 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 17 treesize of output 23 [2022-11-22 01:45:08,121 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:45:08,122 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 [2022-11-22 01:45:08,216 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 27 treesize of output 26 [2022-11-22 01:45:08,231 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 27 treesize of output 26 [2022-11-22 01:45:08,257 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 23 treesize of output 1 [2022-11-22 01:45:08,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:45:08,301 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 38 treesize of output 40 [2022-11-22 01:45:08,316 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 23 treesize of output 1 [2022-11-22 01:45:08,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:45:08,338 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 38 treesize of output 40 [2022-11-22 01:45:08,401 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 [2022-11-22 01:45:08,413 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 [2022-11-22 01:45:08,422 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 [2022-11-22 01:45:08,450 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 11 [2022-11-22 01:45:08,462 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 11 [2022-11-22 01:45:08,500 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:45:08,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2022-11-22 01:45:08,544 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 23 treesize of output 1 [2022-11-22 01:45:08,558 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 11 [2022-11-22 01:45:08,568 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 11 [2022-11-22 01:45:08,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:45:08,643 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-22 01:45:08,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-22 01:45:08,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:45:08,684 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-22 01:45:08,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-22 01:45:08,703 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 23 treesize of output 1 [2022-11-22 01:45:09,354 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:45:09,355 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 17 treesize of output 23 [2022-11-22 01:45:09,387 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:45:09,387 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 [2022-11-22 01:45:09,457 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 27 treesize of output 26 [2022-11-22 01:45:09,474 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 23 treesize of output 1 [2022-11-22 01:45:09,486 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 27 treesize of output 26 [2022-11-22 01:45:09,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:45:09,518 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 38 treesize of output 40 [2022-11-22 01:45:09,534 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 23 treesize of output 1 [2022-11-22 01:45:09,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:45:09,557 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 38 treesize of output 40 [2022-11-22 01:45:09,586 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 [2022-11-22 01:45:09,594 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 [2022-11-22 01:45:09,605 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 [2022-11-22 01:45:09,632 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 11 [2022-11-22 01:45:09,667 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:45:09,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2022-11-22 01:45:09,682 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 11 [2022-11-22 01:45:09,743 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 11 [2022-11-22 01:45:09,752 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 11 [2022-11-22 01:45:09,768 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 23 treesize of output 1 [2022-11-22 01:45:09,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:45:09,858 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-22 01:45:09,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-22 01:45:09,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:45:09,889 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-22 01:45:09,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-22 01:45:09,909 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 23 treesize of output 1 [2022-11-22 01:45:10,585 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:45:10,585 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 17 treesize of output 23 [2022-11-22 01:45:10,619 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:45:10,619 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 [2022-11-22 01:45:10,749 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 27 treesize of output 26 [2022-11-22 01:45:10,762 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 23 treesize of output 1 [2022-11-22 01:45:10,780 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 27 treesize of output 26 [2022-11-22 01:45:10,806 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 15 for LOIs [2022-11-22 01:45:10,808 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:45:19,727 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '259499#(and (= |~#list~0.offset| 0) (not (< |ULTIMATE.start_main_~cursor~0#1.base| |#StackHeapBarrier|)) (= (select |#valid| |~#list~0.base|) 1) (= |ULTIMATE.start_main_~next~1#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~cursor~0#1.base|) (+ (* 4 |ULTIMATE.start_main_~direction~0#1|) |ULTIMATE.start_main_~cursor~0#1.offset|))) (= (select (select |#memory_$Pointer$.offset| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|)) |ULTIMATE.start_main_~cursor~0#1.offset|) (= 3 |~#list~0.base|) (<= 0 ~i~0) (<= (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset| 4) (select |#length| |~#list~0.base|)) (< 0 |ULTIMATE.start_main_~length~0#1|) (= 0 |ULTIMATE.start_main_~cursor~0#1.offset|) (= |ULTIMATE.start_main_~y~0#1| 0) (or (and (= ~unnamed2~0~ITEM_NEXT |ULTIMATE.start_main_~direction~0#1|) (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_~end_point~0#1|)) (and (= ~unnamed2~0~ITEM_PREV |ULTIMATE.start_main_~direction~0#1|) (= ~unnamed1~0~LIST_END |ULTIMATE.start_main_~end_point~0#1|))) (= (select |#valid| |ULTIMATE.start_main_~cursor~0#1.base|) 1) (<= (+ (* 4 |ULTIMATE.start_main_~direction~0#1|) 4 |ULTIMATE.start_main_~cursor~0#1.offset|) (select |#length| |ULTIMATE.start_main_~cursor~0#1.base|)) (= |ULTIMATE.start_main_~z~0#1| 0) (= |ULTIMATE.start_main_~next~1#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~cursor~0#1.base|) (+ (* 4 |ULTIMATE.start_main_~direction~0#1|) |ULTIMATE.start_main_~cursor~0#1.offset|))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.base| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|)) |ULTIMATE.start_main_~cursor~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 01:45:19,728 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:45:19,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:45:19,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 42 [2022-11-22 01:45:19,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128001274] [2022-11-22 01:45:19,728 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:45:19,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-22 01:45:19,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:45:19,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-22 01:45:19,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=6172, Unknown=5, NotChecked=0, Total=6642 [2022-11-22 01:45:19,730 INFO L87 Difference]: Start difference. First operand 6770 states and 9083 transitions. Second operand has 43 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 40 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 01:45:32,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:45:32,307 INFO L93 Difference]: Finished difference Result 9433 states and 12594 transitions. [2022-11-22 01:45:32,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-22 01:45:32,308 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 40 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 56 [2022-11-22 01:45:32,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:45:32,317 INFO L225 Difference]: With dead ends: 9433 [2022-11-22 01:45:32,317 INFO L226 Difference]: Without dead ends: 9433 [2022-11-22 01:45:32,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 83 SyntacticMatches, 5 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6414 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=2899, Invalid=18852, Unknown=5, NotChecked=0, Total=21756 [2022-11-22 01:45:32,319 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 3546 mSDsluCounter, 2253 mSDsCounter, 0 mSdLazyCounter, 4101 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3548 SdHoareTripleChecker+Valid, 2335 SdHoareTripleChecker+Invalid, 4540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 4101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:45:32,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3548 Valid, 2335 Invalid, 4540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 4101 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-22 01:45:32,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9433 states. [2022-11-22 01:45:32,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9433 to 7369. [2022-11-22 01:45:32,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7369 states, 6686 states have (on average 1.3324857912055041) internal successors, (8909), 6841 states have internal predecessors, (8909), 481 states have call successors, (481), 179 states have call predecessors, (481), 179 states have return successors, (481), 348 states have call predecessors, (481), 481 states have call successors, (481) [2022-11-22 01:45:32,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7369 states to 7369 states and 9871 transitions. [2022-11-22 01:45:32,421 INFO L78 Accepts]: Start accepts. Automaton has 7369 states and 9871 transitions. Word has length 56 [2022-11-22 01:45:32,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:45:32,421 INFO L495 AbstractCegarLoop]: Abstraction has 7369 states and 9871 transitions. [2022-11-22 01:45:32,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 40 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 01:45:32,422 INFO L276 IsEmpty]: Start isEmpty. Operand 7369 states and 9871 transitions. [2022-11-22 01:45:32,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-22 01:45:32,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:45:32,423 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:45:32,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-22 01:45:32,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-11-22 01:45:32,630 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-22 01:45:32,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:45:32,630 INFO L85 PathProgramCache]: Analyzing trace with hash 2033848062, now seen corresponding path program 1 times [2022-11-22 01:45:32,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:45:32,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438349906] [2022-11-22 01:45:32,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:45:32,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:45:32,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:45:32,801 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:45:32,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:45:32,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438349906] [2022-11-22 01:45:32,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438349906] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:45:32,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336315692] [2022-11-22 01:45:32,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:45:32,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:45:32,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:45:32,803 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:45:32,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2378e404-6176-433e-83e1-664ee42f8831/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-22 01:45:33,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:45:33,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-22 01:45:33,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:45:33,445 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 11 [2022-11-22 01:45:33,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:45:33,547 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 43 treesize of output 34 [2022-11-22 01:45:33,633 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 0 case distinctions, treesize of input 28 treesize of output 17 [2022-11-22 01:45:33,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:45:33,768 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 35 treesize of output 15 [2022-11-22 01:45:33,813 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_remove_one_#t~mem14#1.base_28| Int)) (and (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_remove_one_#t~mem14#1.base_28| 0)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_remove_one_#t~mem14#1.base_28|) 0))) is different from true [2022-11-22 01:45:33,870 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 4 not checked. [2022-11-22 01:45:33,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:45:34,005 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2008 Int)) (= (store |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |c_ULTIMATE.start_append_one_~list#1.offset|) v_ArrVal_2008)) |c_~#list~0.base|) (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_BEG 4))) 0) |c_ULTIMATE.start_main_old_#valid#1|)) is different from false [2022-11-22 01:45:34,021 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 334 treesize of output 318