./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0217.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0217.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh --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 163bc3b45d6f21a8e478003f84571178259b289b3d9717ecadbc4595fc507bec --- 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-2329fc7 [2022-12-14 12:23:14,985 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:23:14,986 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:23:14,999 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:23:14,999 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:23:15,000 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:23:15,001 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:23:15,002 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:23:15,003 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:23:15,003 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:23:15,004 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:23:15,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:23:15,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:23:15,005 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:23:15,006 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:23:15,007 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:23:15,007 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:23:15,008 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:23:15,009 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:23:15,010 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:23:15,011 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:23:15,012 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:23:15,012 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:23:15,013 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:23:15,015 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:23:15,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:23:15,015 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:23:15,016 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:23:15,016 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:23:15,017 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:23:15,017 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:23:15,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:23:15,018 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:23:15,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:23:15,019 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:23:15,019 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:23:15,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:23:15,020 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:23:15,020 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:23:15,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:23:15,021 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:23:15,022 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 12:23:15,037 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:23:15,037 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:23:15,037 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:23:15,037 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:23:15,038 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:23:15,038 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:23:15,038 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:23:15,038 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:23:15,038 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:23:15,039 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:23:15,039 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:23:15,039 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:23:15,039 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:23:15,039 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:23:15,039 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:23:15,039 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:23:15,039 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:23:15,040 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:23:15,040 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 12:23:15,040 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 12:23:15,040 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:23:15,040 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:23:15,041 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 12:23:15,041 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:23:15,041 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:23:15,041 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:23:15,041 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 12:23:15,041 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 12:23:15,041 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 12:23:15,041 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:23:15,042 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 12:23:15,042 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:23:15,042 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:23:15,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:23:15,042 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:23:15,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:23:15,042 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:23:15,042 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:23:15,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:23:15,043 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:23:15,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:23:15,043 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:23:15,043 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_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 163bc3b45d6f21a8e478003f84571178259b289b3d9717ecadbc4595fc507bec [2022-12-14 12:23:15,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:23:15,239 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:23:15,241 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:23:15,242 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:23:15,243 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:23:15,244 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/memsafety/test-0217.i [2022-12-14 12:23:17,769 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:23:17,965 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:23:17,965 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/sv-benchmarks/c/memsafety/test-0217.i [2022-12-14 12:23:17,974 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/data/41b5747d0/f7222629bd9c48bb81b084b1eff2b2ab/FLAG5b2975264 [2022-12-14 12:23:18,327 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/data/41b5747d0/f7222629bd9c48bb81b084b1eff2b2ab [2022-12-14 12:23:18,329 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:23:18,330 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:23:18,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:23:18,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:23:18,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:23:18,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:23:18" (1/1) ... [2022-12-14 12:23:18,336 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f6c0a70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:23:18, skipping insertion in model container [2022-12-14 12:23:18,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:23:18" (1/1) ... [2022-12-14 12:23:18,341 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:23:18,372 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:23:18,642 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:23:18,653 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:23:18,695 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:23:18,720 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:23:18,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:23:18 WrapperNode [2022-12-14 12:23:18,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:23:18,721 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:23:18,721 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:23:18,721 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:23:18,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:23:18" (1/1) ... [2022-12-14 12:23:18,741 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:23:18" (1/1) ... [2022-12-14 12:23:18,766 INFO L138 Inliner]: procedures = 181, calls = 47, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 210 [2022-12-14 12:23:18,767 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:23:18,767 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:23:18,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:23:18,768 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:23:18,775 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:23:18" (1/1) ... [2022-12-14 12:23:18,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:23:18" (1/1) ... [2022-12-14 12:23:18,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:23:18" (1/1) ... [2022-12-14 12:23:18,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:23:18" (1/1) ... [2022-12-14 12:23:18,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:23:18" (1/1) ... [2022-12-14 12:23:18,794 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:23:18" (1/1) ... [2022-12-14 12:23:18,796 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:23:18" (1/1) ... [2022-12-14 12:23:18,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:23:18" (1/1) ... [2022-12-14 12:23:18,801 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:23:18,802 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:23:18,802 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:23:18,802 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:23:18,803 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:23:18" (1/1) ... [2022-12-14 12:23:18,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:23:18,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:23:18,830 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:23:18,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:23:18,865 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2022-12-14 12:23:18,865 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2022-12-14 12:23:18,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 12:23:18,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 12:23:18,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:23:18,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 12:23:18,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 12:23:18,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 12:23:18,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 12:23:18,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:23:18,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:23:18,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:23:18,960 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:23:18,961 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:23:19,301 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:23:19,378 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:23:19,378 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-12-14 12:23:19,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:23:19 BoogieIcfgContainer [2022-12-14 12:23:19,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:23:19,384 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:23:19,384 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:23:19,387 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:23:19,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:23:18" (1/3) ... [2022-12-14 12:23:19,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d9f3470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:23:19, skipping insertion in model container [2022-12-14 12:23:19,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:23:18" (2/3) ... [2022-12-14 12:23:19,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d9f3470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:23:19, skipping insertion in model container [2022-12-14 12:23:19,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:23:19" (3/3) ... [2022-12-14 12:23:19,390 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0217.i [2022-12-14 12:23:19,408 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:23:19,408 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 67 error locations. [2022-12-14 12:23:19,442 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:23:19,447 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;@5d4b3888, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:23:19,447 INFO L358 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2022-12-14 12:23:19,450 INFO L276 IsEmpty]: Start isEmpty. Operand has 138 states, 67 states have (on average 2.2686567164179103) internal successors, (152), 134 states have internal predecessors, (152), 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) [2022-12-14 12:23:19,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 12:23:19,454 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:19,455 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 12:23:19,464 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:23:19,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:19,468 INFO L85 PathProgramCache]: Analyzing trace with hash 10235659, now seen corresponding path program 1 times [2022-12-14 12:23:19,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:19,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202985036] [2022-12-14 12:23:19,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:19,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:19,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:19,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:19,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:19,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202985036] [2022-12-14 12:23:19,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202985036] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:19,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:19,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 12:23:19,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578699626] [2022-12-14 12:23:19,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:19,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 12:23:19,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:19,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 12:23:19,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 12:23:19,612 INFO L87 Difference]: Start difference. First operand has 138 states, 67 states have (on average 2.2686567164179103) internal successors, (152), 134 states have internal predecessors, (152), 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) [2022-12-14 12:23:19,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:19,677 INFO L93 Difference]: Finished difference Result 138 states and 152 transitions. [2022-12-14 12:23:19,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 12:23:19,679 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 [2022-12-14 12:23:19,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:19,687 INFO L225 Difference]: With dead ends: 138 [2022-12-14 12:23:19,687 INFO L226 Difference]: Without dead ends: 137 [2022-12-14 12:23:19,689 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 [2022-12-14 12:23:19,692 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:19,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 129 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:23:19,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-12-14 12:23:19,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-12-14 12:23:19,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 67 states have (on average 2.1940298507462686) internal successors, (147), 133 states have internal predecessors, (147), 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) [2022-12-14 12:23:19,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2022-12-14 12:23:19,724 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 4 [2022-12-14 12:23:19,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:19,724 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2022-12-14 12:23:19,724 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) [2022-12-14 12:23:19,724 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2022-12-14 12:23:19,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 12:23:19,724 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:19,725 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 12:23:19,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 12:23:19,725 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:23:19,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:19,725 INFO L85 PathProgramCache]: Analyzing trace with hash 309792813, now seen corresponding path program 1 times [2022-12-14 12:23:19,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:19,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386593303] [2022-12-14 12:23:19,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:19,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:19,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:19,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:19,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:19,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386593303] [2022-12-14 12:23:19,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386593303] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:19,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:19,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 12:23:19,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133737520] [2022-12-14 12:23:19,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:19,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:23:19,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:19,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:23:19,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:23:19,809 INFO L87 Difference]: Start difference. First operand 137 states and 151 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) [2022-12-14 12:23:19,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:19,994 INFO L93 Difference]: Finished difference Result 267 states and 294 transitions. [2022-12-14 12:23:19,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:23:19,994 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 [2022-12-14 12:23:19,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:19,996 INFO L225 Difference]: With dead ends: 267 [2022-12-14 12:23:19,996 INFO L226 Difference]: Without dead ends: 267 [2022-12-14 12:23:19,996 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 [2022-12-14 12:23:19,997 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 135 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:19,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 160 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:23:19,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-12-14 12:23:20,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 180. [2022-12-14 12:23:20,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 107 states have (on average 2.177570093457944) internal successors, (233), 173 states have internal predecessors, (233), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 12:23:20,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 241 transitions. [2022-12-14 12:23:20,008 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 241 transitions. Word has length 5 [2022-12-14 12:23:20,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:20,008 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 241 transitions. [2022-12-14 12:23:20,008 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) [2022-12-14 12:23:20,009 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 241 transitions. [2022-12-14 12:23:20,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 12:23:20,009 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:20,009 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 12:23:20,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 12:23:20,009 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:23:20,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:20,009 INFO L85 PathProgramCache]: Analyzing trace with hash 309792814, now seen corresponding path program 1 times [2022-12-14 12:23:20,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:20,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856246442] [2022-12-14 12:23:20,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:20,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:20,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:20,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:20,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856246442] [2022-12-14 12:23:20,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856246442] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:20,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:20,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 12:23:20,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551112678] [2022-12-14 12:23:20,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:20,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:23:20,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:20,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:23:20,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:23:20,158 INFO L87 Difference]: Start difference. First operand 180 states and 241 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) [2022-12-14 12:23:20,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:20,331 INFO L93 Difference]: Finished difference Result 282 states and 361 transitions. [2022-12-14 12:23:20,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:23:20,331 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 [2022-12-14 12:23:20,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:20,332 INFO L225 Difference]: With dead ends: 282 [2022-12-14 12:23:20,332 INFO L226 Difference]: Without dead ends: 282 [2022-12-14 12:23:20,333 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 [2022-12-14 12:23:20,333 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 101 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:20,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 283 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:23:20,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-12-14 12:23:20,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 238. [2022-12-14 12:23:20,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 159 states have (on average 2.0817610062893084) internal successors, (331), 227 states have internal predecessors, (331), 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) [2022-12-14 12:23:20,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 347 transitions. [2022-12-14 12:23:20,345 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 347 transitions. Word has length 5 [2022-12-14 12:23:20,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:20,346 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 347 transitions. [2022-12-14 12:23:20,346 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) [2022-12-14 12:23:20,346 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 347 transitions. [2022-12-14 12:23:20,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 12:23:20,346 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:20,346 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:23:20,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 12:23:20,346 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:23:20,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:20,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1358194260, now seen corresponding path program 1 times [2022-12-14 12:23:20,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:20,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131069334] [2022-12-14 12:23:20,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:20,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:20,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:20,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:20,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:20,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131069334] [2022-12-14 12:23:20,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131069334] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:20,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:20,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:23:20,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617179470] [2022-12-14 12:23:20,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:20,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:23:20,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:20,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:23:20,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:23:20,616 INFO L87 Difference]: Start difference. First operand 238 states and 347 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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) [2022-12-14 12:23:20,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:20,810 INFO L93 Difference]: Finished difference Result 306 states and 422 transitions. [2022-12-14 12:23:20,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:23:20,811 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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 [2022-12-14 12:23:20,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:20,813 INFO L225 Difference]: With dead ends: 306 [2022-12-14 12:23:20,814 INFO L226 Difference]: Without dead ends: 306 [2022-12-14 12:23:20,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:23:20,815 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 134 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:20,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 300 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:23:20,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-12-14 12:23:20,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 271. [2022-12-14 12:23:20,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 189 states have (on average 2.0476190476190474) internal successors, (387), 258 states have internal predecessors, (387), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 12:23:20,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 407 transitions. [2022-12-14 12:23:20,829 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 407 transitions. Word has length 7 [2022-12-14 12:23:20,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:20,830 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 407 transitions. [2022-12-14 12:23:20,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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) [2022-12-14 12:23:20,830 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 407 transitions. [2022-12-14 12:23:20,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 12:23:20,830 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:20,831 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:23:20,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 12:23:20,831 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:23:20,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:20,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1358195917, now seen corresponding path program 1 times [2022-12-14 12:23:20,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:20,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137514218] [2022-12-14 12:23:20,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:20,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:20,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:20,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:20,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137514218] [2022-12-14 12:23:20,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137514218] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:20,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:20,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 12:23:20,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108552135] [2022-12-14 12:23:20,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:20,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:23:20,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:20,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:23:20,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:23:20,855 INFO L87 Difference]: Start difference. First operand 271 states and 407 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) [2022-12-14 12:23:20,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:20,946 INFO L93 Difference]: Finished difference Result 318 states and 450 transitions. [2022-12-14 12:23:20,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:23:20,947 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 [2022-12-14 12:23:20,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:20,949 INFO L225 Difference]: With dead ends: 318 [2022-12-14 12:23:20,949 INFO L226 Difference]: Without dead ends: 314 [2022-12-14 12:23:20,950 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 [2022-12-14 12:23:20,950 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 58 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:20,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 188 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:23:20,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-12-14 12:23:20,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 269. [2022-12-14 12:23:20,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 187 states have (on average 2.053475935828877) internal successors, (384), 256 states have internal predecessors, (384), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 12:23:20,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 404 transitions. [2022-12-14 12:23:20,958 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 404 transitions. Word has length 7 [2022-12-14 12:23:20,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:20,958 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 404 transitions. [2022-12-14 12:23:20,958 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) [2022-12-14 12:23:20,959 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 404 transitions. [2022-12-14 12:23:20,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 12:23:20,959 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:20,959 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:23:20,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 12:23:20,959 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:23:20,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:20,960 INFO L85 PathProgramCache]: Analyzing trace with hash -2101991332, now seen corresponding path program 1 times [2022-12-14 12:23:20,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:20,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135914744] [2022-12-14 12:23:20,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:20,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:20,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:21,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:21,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135914744] [2022-12-14 12:23:21,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135914744] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:21,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:21,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:23:21,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151978482] [2022-12-14 12:23:21,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:21,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:23:21,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:21,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:23:21,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:23:21,046 INFO L87 Difference]: Start difference. First operand 269 states and 404 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) [2022-12-14 12:23:21,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:21,297 INFO L93 Difference]: Finished difference Result 471 states and 577 transitions. [2022-12-14 12:23:21,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:23:21,298 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 [2022-12-14 12:23:21,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:21,301 INFO L225 Difference]: With dead ends: 471 [2022-12-14 12:23:21,301 INFO L226 Difference]: Without dead ends: 471 [2022-12-14 12:23:21,301 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 [2022-12-14 12:23:21,302 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 385 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:21,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 282 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:23:21,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-12-14 12:23:21,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 266. [2022-12-14 12:23:21,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 188 states have (on average 2.0106382978723403) internal successors, (378), 253 states have internal predecessors, (378), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 12:23:21,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 398 transitions. [2022-12-14 12:23:21,310 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 398 transitions. Word has length 10 [2022-12-14 12:23:21,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:21,310 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 398 transitions. [2022-12-14 12:23:21,314 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) [2022-12-14 12:23:21,314 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 398 transitions. [2022-12-14 12:23:21,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 12:23:21,315 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:21,315 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:23:21,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 12:23:21,315 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:23:21,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:21,316 INFO L85 PathProgramCache]: Analyzing trace with hash -2101991331, now seen corresponding path program 1 times [2022-12-14 12:23:21,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:21,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58272296] [2022-12-14 12:23:21,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:21,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:21,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:21,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:21,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:21,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58272296] [2022-12-14 12:23:21,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58272296] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:21,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:21,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 12:23:21,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755360149] [2022-12-14 12:23:21,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:21,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:23:21,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:21,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:23:21,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:23:21,513 INFO L87 Difference]: Start difference. First operand 266 states and 398 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) [2022-12-14 12:23:22,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:22,127 INFO L93 Difference]: Finished difference Result 564 states and 712 transitions. [2022-12-14 12:23:22,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 12:23:22,127 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 [2022-12-14 12:23:22,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:22,129 INFO L225 Difference]: With dead ends: 564 [2022-12-14 12:23:22,129 INFO L226 Difference]: Without dead ends: 564 [2022-12-14 12:23:22,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-12-14 12:23:22,130 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 505 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:22,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 378 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 12:23:22,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-12-14 12:23:22,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 281. [2022-12-14 12:23:22,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 203 states have (on average 2.0098522167487687) internal successors, (408), 268 states have internal predecessors, (408), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 12:23:22,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 428 transitions. [2022-12-14 12:23:22,141 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 428 transitions. Word has length 10 [2022-12-14 12:23:22,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:22,141 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 428 transitions. [2022-12-14 12:23:22,141 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) [2022-12-14 12:23:22,142 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 428 transitions. [2022-12-14 12:23:22,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 12:23:22,142 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:22,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:23:22,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 12:23:22,142 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:23:22,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:22,143 INFO L85 PathProgramCache]: Analyzing trace with hash 507782900, now seen corresponding path program 1 times [2022-12-14 12:23:22,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:22,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373560869] [2022-12-14 12:23:22,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:22,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:22,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:22,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:22,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373560869] [2022-12-14 12:23:22,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373560869] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:22,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:22,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:23:22,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183936986] [2022-12-14 12:23:22,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:22,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:23:22,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:22,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:23:22,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:23:22,180 INFO L87 Difference]: Start difference. First operand 281 states and 428 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) [2022-12-14 12:23:22,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:22,405 INFO L93 Difference]: Finished difference Result 477 states and 646 transitions. [2022-12-14 12:23:22,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:23:22,405 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 [2022-12-14 12:23:22,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:22,407 INFO L225 Difference]: With dead ends: 477 [2022-12-14 12:23:22,407 INFO L226 Difference]: Without dead ends: 477 [2022-12-14 12:23:22,407 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 [2022-12-14 12:23:22,408 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 250 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:22,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 275 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:23:22,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-12-14 12:23:22,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 287. [2022-12-14 12:23:22,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 209 states have (on average 1.9808612440191387) internal successors, (414), 274 states have internal predecessors, (414), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 12:23:22,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 434 transitions. [2022-12-14 12:23:22,415 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 434 transitions. Word has length 12 [2022-12-14 12:23:22,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:22,415 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 434 transitions. [2022-12-14 12:23:22,415 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) [2022-12-14 12:23:22,416 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 434 transitions. [2022-12-14 12:23:22,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 12:23:22,416 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:22,416 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:23:22,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 12:23:22,417 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:23:22,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:22,417 INFO L85 PathProgramCache]: Analyzing trace with hash 507782901, now seen corresponding path program 1 times [2022-12-14 12:23:22,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:22,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184745872] [2022-12-14 12:23:22,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:22,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:22,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:22,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:22,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184745872] [2022-12-14 12:23:22,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184745872] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:22,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:22,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:23:22,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347022960] [2022-12-14 12:23:22,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:22,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:23:22,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:22,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:23:22,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:23:22,482 INFO L87 Difference]: Start difference. First operand 287 states and 434 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) [2022-12-14 12:23:22,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:22,666 INFO L93 Difference]: Finished difference Result 338 states and 453 transitions. [2022-12-14 12:23:22,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:23:22,667 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 [2022-12-14 12:23:22,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:22,667 INFO L225 Difference]: With dead ends: 338 [2022-12-14 12:23:22,667 INFO L226 Difference]: Without dead ends: 338 [2022-12-14 12:23:22,668 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 [2022-12-14 12:23:22,668 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 160 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:22,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 281 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:23:22,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-12-14 12:23:22,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 287. [2022-12-14 12:23:22,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 209 states have (on average 1.937799043062201) internal successors, (405), 274 states have internal predecessors, (405), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 12:23:22,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 425 transitions. [2022-12-14 12:23:22,674 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 425 transitions. Word has length 12 [2022-12-14 12:23:22,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:22,674 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 425 transitions. [2022-12-14 12:23:22,674 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) [2022-12-14 12:23:22,674 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 425 transitions. [2022-12-14 12:23:22,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 12:23:22,674 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:22,674 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:23:22,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 12:23:22,675 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:23:22,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:22,675 INFO L85 PathProgramCache]: Analyzing trace with hash 207090180, now seen corresponding path program 1 times [2022-12-14 12:23:22,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:22,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088048611] [2022-12-14 12:23:22,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:22,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:22,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:22,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:22,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:22,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088048611] [2022-12-14 12:23:22,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088048611] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:22,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:22,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 12:23:22,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505944292] [2022-12-14 12:23:22,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:22,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:23:22,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:22,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:23:22,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:23:22,936 INFO L87 Difference]: Start difference. First operand 287 states and 425 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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) [2022-12-14 12:23:23,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:23,317 INFO L93 Difference]: Finished difference Result 376 states and 519 transitions. [2022-12-14 12:23:23,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 12:23:23,317 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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 [2022-12-14 12:23:23,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:23,320 INFO L225 Difference]: With dead ends: 376 [2022-12-14 12:23:23,320 INFO L226 Difference]: Without dead ends: 376 [2022-12-14 12:23:23,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-12-14 12:23:23,321 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 141 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:23,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 649 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:23:23,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-12-14 12:23:23,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 293. [2022-12-14 12:23:23,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 215 states have (on average 1.9209302325581394) internal successors, (413), 278 states have internal predecessors, (413), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 12:23:23,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 433 transitions. [2022-12-14 12:23:23,327 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 433 transitions. Word has length 13 [2022-12-14 12:23:23,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:23,327 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 433 transitions. [2022-12-14 12:23:23,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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) [2022-12-14 12:23:23,328 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 433 transitions. [2022-12-14 12:23:23,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 12:23:23,328 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:23,328 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:23:23,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 12:23:23,328 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:23:23,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:23,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1461189221, now seen corresponding path program 1 times [2022-12-14 12:23:23,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:23,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487134113] [2022-12-14 12:23:23,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:23,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:23,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:23,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:23,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:23,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487134113] [2022-12-14 12:23:23,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487134113] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:23,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:23,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 12:23:23,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169117860] [2022-12-14 12:23:23,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:23,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:23:23,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:23,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:23:23,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:23:23,558 INFO L87 Difference]: Start difference. First operand 293 states and 433 transitions. Second operand has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2022-12-14 12:23:23,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:23,806 INFO L93 Difference]: Finished difference Result 334 states and 443 transitions. [2022-12-14 12:23:23,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 12:23:23,807 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 15 [2022-12-14 12:23:23,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:23,808 INFO L225 Difference]: With dead ends: 334 [2022-12-14 12:23:23,808 INFO L226 Difference]: Without dead ends: 334 [2022-12-14 12:23:23,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-12-14 12:23:23,809 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 478 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:23,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 443 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:23:23,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-12-14 12:23:23,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 291. [2022-12-14 12:23:23,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 215 states have (on average 1.8930232558139535) internal successors, (407), 276 states have internal predecessors, (407), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 12:23:23,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 427 transitions. [2022-12-14 12:23:23,818 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 427 transitions. Word has length 15 [2022-12-14 12:23:23,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:23,818 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 427 transitions. [2022-12-14 12:23:23,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2022-12-14 12:23:23,819 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 427 transitions. [2022-12-14 12:23:23,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 12:23:23,819 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:23,819 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:23:23,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 12:23:23,820 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:23:23,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:23,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1461189220, now seen corresponding path program 1 times [2022-12-14 12:23:23,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:23,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552077626] [2022-12-14 12:23:23,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:23,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:23,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:23,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:23,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:23,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552077626] [2022-12-14 12:23:23,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552077626] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:23,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:23,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 12:23:23,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940672968] [2022-12-14 12:23:23,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:23,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:23:23,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:23,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:23:23,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:23:23,861 INFO L87 Difference]: Start difference. First operand 291 states and 427 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-12-14 12:23:23,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:23,963 INFO L93 Difference]: Finished difference Result 364 states and 502 transitions. [2022-12-14 12:23:23,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:23:23,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 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 15 [2022-12-14 12:23:23,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:23,965 INFO L225 Difference]: With dead ends: 364 [2022-12-14 12:23:23,965 INFO L226 Difference]: Without dead ends: 364 [2022-12-14 12:23:23,965 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 [2022-12-14 12:23:23,966 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 120 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:23,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 189 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:23:23,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-12-14 12:23:23,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 288. [2022-12-14 12:23:23,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 215 states have (on average 1.8511627906976744) internal successors, (398), 273 states have internal predecessors, (398), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 12:23:23,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 418 transitions. [2022-12-14 12:23:23,975 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 418 transitions. Word has length 15 [2022-12-14 12:23:23,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:23,975 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 418 transitions. [2022-12-14 12:23:23,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-12-14 12:23:23,975 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 418 transitions. [2022-12-14 12:23:23,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 12:23:23,976 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:23,976 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:23:23,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 12:23:23,976 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:23:23,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:23,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1461191040, now seen corresponding path program 1 times [2022-12-14 12:23:23,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:23,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414496333] [2022-12-14 12:23:23,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:23,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:23,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:24,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:24,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:24,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414496333] [2022-12-14 12:23:24,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414496333] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:24,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:24,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:23:24,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591042163] [2022-12-14 12:23:24,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:24,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:23:24,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:24,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:23:24,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:23:24,013 INFO L87 Difference]: Start difference. First operand 288 states and 418 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-12-14 12:23:24,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:24,054 INFO L93 Difference]: Finished difference Result 294 states and 424 transitions. [2022-12-14 12:23:24,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:23:24,055 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 15 [2022-12-14 12:23:24,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:24,056 INFO L225 Difference]: With dead ends: 294 [2022-12-14 12:23:24,056 INFO L226 Difference]: Without dead ends: 294 [2022-12-14 12:23:24,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:23:24,057 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 1 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:24,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 353 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:23:24,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-12-14 12:23:24,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2022-12-14 12:23:24,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 221 states have (on average 1.8280542986425339) internal successors, (404), 279 states have internal predecessors, (404), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 12:23:24,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 424 transitions. [2022-12-14 12:23:24,065 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 424 transitions. Word has length 15 [2022-12-14 12:23:24,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:24,065 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 424 transitions. [2022-12-14 12:23:24,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-12-14 12:23:24,065 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 424 transitions. [2022-12-14 12:23:24,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 12:23:24,066 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:24,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:23:24,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 12:23:24,066 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:23:24,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:24,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1993620963, now seen corresponding path program 1 times [2022-12-14 12:23:24,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:24,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902100470] [2022-12-14 12:23:24,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:24,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:24,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:24,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:24,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902100470] [2022-12-14 12:23:24,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902100470] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:24,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:24,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 12:23:24,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801695969] [2022-12-14 12:23:24,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:24,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:23:24,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:24,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:23:24,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:23:24,321 INFO L87 Difference]: Start difference. First operand 294 states and 424 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) [2022-12-14 12:23:24,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:24,690 INFO L93 Difference]: Finished difference Result 491 states and 665 transitions. [2022-12-14 12:23:24,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 12:23:24,690 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 [2022-12-14 12:23:24,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:24,692 INFO L225 Difference]: With dead ends: 491 [2022-12-14 12:23:24,692 INFO L226 Difference]: Without dead ends: 489 [2022-12-14 12:23:24,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-12-14 12:23:24,693 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 330 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:24,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 749 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:23:24,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-12-14 12:23:24,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 288. [2022-12-14 12:23:24,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 215 states have (on average 1.827906976744186) internal successors, (393), 273 states have internal predecessors, (393), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 12:23:24,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 413 transitions. [2022-12-14 12:23:24,703 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 413 transitions. Word has length 16 [2022-12-14 12:23:24,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:24,704 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 413 transitions. [2022-12-14 12:23:24,704 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) [2022-12-14 12:23:24,704 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 413 transitions. [2022-12-14 12:23:24,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 12:23:24,704 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:24,705 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:23:24,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 12:23:24,705 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:23:24,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:24,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1672355351, now seen corresponding path program 1 times [2022-12-14 12:23:24,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:24,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144832073] [2022-12-14 12:23:24,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:24,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:24,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:24,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:24,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:24,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144832073] [2022-12-14 12:23:24,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144832073] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:24,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:24,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:23:24,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128016422] [2022-12-14 12:23:24,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:24,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:23:24,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:24,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:23:24,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:23:24,752 INFO L87 Difference]: Start difference. First operand 288 states and 413 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) [2022-12-14 12:23:24,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:24,966 INFO L93 Difference]: Finished difference Result 470 states and 612 transitions. [2022-12-14 12:23:24,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:23:24,967 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 [2022-12-14 12:23:24,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:24,968 INFO L225 Difference]: With dead ends: 470 [2022-12-14 12:23:24,968 INFO L226 Difference]: Without dead ends: 470 [2022-12-14 12:23:24,969 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 [2022-12-14 12:23:24,969 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 225 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:24,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 275 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:23:24,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-12-14 12:23:24,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 304. [2022-12-14 12:23:24,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 231 states have (on average 1.8571428571428572) internal successors, (429), 289 states have internal predecessors, (429), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 12:23:24,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 449 transitions. [2022-12-14 12:23:24,983 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 449 transitions. Word has length 17 [2022-12-14 12:23:24,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:24,983 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 449 transitions. [2022-12-14 12:23:24,983 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) [2022-12-14 12:23:24,983 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 449 transitions. [2022-12-14 12:23:24,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 12:23:24,983 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:24,984 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:23:24,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 12:23:24,984 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:23:24,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:24,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1672355350, now seen corresponding path program 1 times [2022-12-14 12:23:24,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:24,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007256424] [2022-12-14 12:23:24,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:24,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:24,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:25,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:25,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:25,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007256424] [2022-12-14 12:23:25,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007256424] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:25,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:25,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 12:23:25,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680321021] [2022-12-14 12:23:25,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:25,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:23:25,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:25,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:23:25,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:23:25,101 INFO L87 Difference]: Start difference. First operand 304 states and 449 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 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) [2022-12-14 12:23:25,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:25,306 INFO L93 Difference]: Finished difference Result 351 states and 467 transitions. [2022-12-14 12:23:25,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:23:25,306 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 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 [2022-12-14 12:23:25,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:25,307 INFO L225 Difference]: With dead ends: 351 [2022-12-14 12:23:25,308 INFO L226 Difference]: Without dead ends: 351 [2022-12-14 12:23:25,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:23:25,308 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 299 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:25,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 344 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:23:25,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-12-14 12:23:25,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 304. [2022-12-14 12:23:25,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 231 states have (on average 1.8181818181818181) internal successors, (420), 289 states have internal predecessors, (420), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 12:23:25,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 440 transitions. [2022-12-14 12:23:25,316 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 440 transitions. Word has length 17 [2022-12-14 12:23:25,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:25,316 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 440 transitions. [2022-12-14 12:23:25,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 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) [2022-12-14 12:23:25,316 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 440 transitions. [2022-12-14 12:23:25,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 12:23:25,317 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:25,317 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:23:25,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 12:23:25,317 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:23:25,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:25,318 INFO L85 PathProgramCache]: Analyzing trace with hash -251463163, now seen corresponding path program 1 times [2022-12-14 12:23:25,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:25,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937712320] [2022-12-14 12:23:25,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:25,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:25,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:25,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:25,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:25,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937712320] [2022-12-14 12:23:25,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937712320] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:25,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:25,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 12:23:25,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367591741] [2022-12-14 12:23:25,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:25,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:23:25,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:25,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:23:25,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:23:25,386 INFO L87 Difference]: Start difference. First operand 304 states and 440 transitions. Second operand has 5 states, 5 states have (on average 3.0) 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) [2022-12-14 12:23:25,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:25,491 INFO L93 Difference]: Finished difference Result 464 states and 649 transitions. [2022-12-14 12:23:25,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:23:25,492 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 [2022-12-14 12:23:25,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:25,494 INFO L225 Difference]: With dead ends: 464 [2022-12-14 12:23:25,494 INFO L226 Difference]: Without dead ends: 464 [2022-12-14 12:23:25,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:23:25,495 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 124 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:25,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 431 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:23:25,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-12-14 12:23:25,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 322. [2022-12-14 12:23:25,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 249 states have (on average 1.7791164658634537) internal successors, (443), 307 states have internal predecessors, (443), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 12:23:25,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 463 transitions. [2022-12-14 12:23:25,504 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 463 transitions. Word has length 17 [2022-12-14 12:23:25,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:25,504 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 463 transitions. [2022-12-14 12:23:25,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-12-14 12:23:25,504 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 463 transitions. [2022-12-14 12:23:25,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 12:23:25,505 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:25,505 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:23:25,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 12:23:25,505 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:23:25,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:25,506 INFO L85 PathProgramCache]: Analyzing trace with hash -251462969, now seen corresponding path program 1 times [2022-12-14 12:23:25,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:25,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501270924] [2022-12-14 12:23:25,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:25,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:25,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:25,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:25,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:25,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501270924] [2022-12-14 12:23:25,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501270924] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:25,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:25,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 12:23:25,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97637047] [2022-12-14 12:23:25,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:25,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:23:25,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:25,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:23:25,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:23:25,730 INFO L87 Difference]: Start difference. First operand 322 states and 463 transitions. Second operand has 7 states, 5 states have (on average 3.0) 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) [2022-12-14 12:23:25,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:25,931 INFO L93 Difference]: Finished difference Result 361 states and 473 transitions. [2022-12-14 12:23:25,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 12:23:25,931 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.0) 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 [2022-12-14 12:23:25,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:25,932 INFO L225 Difference]: With dead ends: 361 [2022-12-14 12:23:25,932 INFO L226 Difference]: Without dead ends: 361 [2022-12-14 12:23:25,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-12-14 12:23:25,932 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 458 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:25,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 440 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:23:25,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-12-14 12:23:25,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 321. [2022-12-14 12:23:25,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 249 states have (on average 1.7550200803212852) internal successors, (437), 306 states have internal predecessors, (437), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 12:23:25,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 457 transitions. [2022-12-14 12:23:25,937 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 457 transitions. Word has length 17 [2022-12-14 12:23:25,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:25,937 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 457 transitions. [2022-12-14 12:23:25,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.0) 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) [2022-12-14 12:23:25,938 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 457 transitions. [2022-12-14 12:23:25,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 12:23:25,938 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:25,938 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] [2022-12-14 12:23:25,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 12:23:25,938 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:23:25,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:25,938 INFO L85 PathProgramCache]: Analyzing trace with hash 482541667, now seen corresponding path program 1 times [2022-12-14 12:23:25,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:25,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310783172] [2022-12-14 12:23:25,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:25,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:25,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:26,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:26,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:26,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310783172] [2022-12-14 12:23:26,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310783172] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:26,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:26,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 12:23:26,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517010214] [2022-12-14 12:23:26,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:26,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 12:23:26,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:26,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 12:23:26,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:23:26,075 INFO L87 Difference]: Start difference. First operand 321 states and 457 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) [2022-12-14 12:23:26,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:26,375 INFO L93 Difference]: Finished difference Result 484 states and 657 transitions. [2022-12-14 12:23:26,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 12:23:26,375 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 [2022-12-14 12:23:26,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:26,377 INFO L225 Difference]: With dead ends: 484 [2022-12-14 12:23:26,377 INFO L226 Difference]: Without dead ends: 484 [2022-12-14 12:23:26,377 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 [2022-12-14 12:23:26,378 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 408 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:26,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 727 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:23:26,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-12-14 12:23:26,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 319. [2022-12-14 12:23:26,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 249 states have (on average 1.7228915662650603) internal successors, (429), 304 states have internal predecessors, (429), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 12:23:26,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 449 transitions. [2022-12-14 12:23:26,386 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 449 transitions. Word has length 20 [2022-12-14 12:23:26,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:26,386 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 449 transitions. [2022-12-14 12:23:26,386 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) [2022-12-14 12:23:26,386 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 449 transitions. [2022-12-14 12:23:26,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 12:23:26,387 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:26,387 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] [2022-12-14 12:23:26,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 12:23:26,387 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:23:26,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:26,387 INFO L85 PathProgramCache]: Analyzing trace with hash 2073892596, now seen corresponding path program 1 times [2022-12-14 12:23:26,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:26,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13719902] [2022-12-14 12:23:26,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:26,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:26,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:26,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:26,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13719902] [2022-12-14 12:23:26,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13719902] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:26,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:26,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 12:23:26,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393721885] [2022-12-14 12:23:26,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:26,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:23:26,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:26,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:23:26,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:23:26,587 INFO L87 Difference]: Start difference. First operand 319 states and 449 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) [2022-12-14 12:23:26,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:26,812 INFO L93 Difference]: Finished difference Result 359 states and 459 transitions. [2022-12-14 12:23:26,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:23:26,812 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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 [2022-12-14 12:23:26,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:26,813 INFO L225 Difference]: With dead ends: 359 [2022-12-14 12:23:26,813 INFO L226 Difference]: Without dead ends: 359 [2022-12-14 12:23:26,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-12-14 12:23:26,814 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 150 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:26,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 770 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:23:26,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-12-14 12:23:26,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 239. [2022-12-14 12:23:26,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 175 states have (on average 1.72) internal successors, (301), 229 states have internal predecessors, (301), 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) [2022-12-14 12:23:26,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 313 transitions. [2022-12-14 12:23:26,820 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 313 transitions. Word has length 21 [2022-12-14 12:23:26,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:26,820 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 313 transitions. [2022-12-14 12:23:26,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) [2022-12-14 12:23:26,820 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 313 transitions. [2022-12-14 12:23:26,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 12:23:26,821 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:26,821 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] [2022-12-14 12:23:26,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 12:23:26,822 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:23:26,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:26,822 INFO L85 PathProgramCache]: Analyzing trace with hash 2029763289, now seen corresponding path program 1 times [2022-12-14 12:23:26,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:26,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745375701] [2022-12-14 12:23:26,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:26,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:26,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:26,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:26,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:26,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745375701] [2022-12-14 12:23:26,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745375701] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:26,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:26,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:23:26,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337136098] [2022-12-14 12:23:26,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:26,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:23:26,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:26,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:23:26,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:23:26,882 INFO L87 Difference]: Start difference. First operand 239 states and 313 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) [2022-12-14 12:23:27,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:27,005 INFO L93 Difference]: Finished difference Result 312 states and 393 transitions. [2022-12-14 12:23:27,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:23:27,005 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 [2022-12-14 12:23:27,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:27,006 INFO L225 Difference]: With dead ends: 312 [2022-12-14 12:23:27,006 INFO L226 Difference]: Without dead ends: 312 [2022-12-14 12:23:27,006 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 [2022-12-14 12:23:27,006 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 302 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:27,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 276 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:23:27,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-12-14 12:23:27,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 238. [2022-12-14 12:23:27,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 175 states have (on average 1.7085714285714286) internal successors, (299), 228 states have internal predecessors, (299), 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) [2022-12-14 12:23:27,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 311 transitions. [2022-12-14 12:23:27,012 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 311 transitions. Word has length 21 [2022-12-14 12:23:27,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:27,012 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 311 transitions. [2022-12-14 12:23:27,012 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) [2022-12-14 12:23:27,013 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 311 transitions. [2022-12-14 12:23:27,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 12:23:27,013 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:27,013 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] [2022-12-14 12:23:27,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-14 12:23:27,013 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:23:27,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:27,014 INFO L85 PathProgramCache]: Analyzing trace with hash 2029763290, now seen corresponding path program 1 times [2022-12-14 12:23:27,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:27,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372617260] [2022-12-14 12:23:27,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:27,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:27,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:27,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:27,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:27,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372617260] [2022-12-14 12:23:27,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372617260] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:27,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:27,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:23:27,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097298986] [2022-12-14 12:23:27,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:27,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:23:27,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:27,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:23:27,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:23:27,117 INFO L87 Difference]: Start difference. First operand 238 states and 311 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) [2022-12-14 12:23:27,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:27,235 INFO L93 Difference]: Finished difference Result 237 states and 309 transitions. [2022-12-14 12:23:27,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:23:27,235 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 [2022-12-14 12:23:27,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:27,236 INFO L225 Difference]: With dead ends: 237 [2022-12-14 12:23:27,236 INFO L226 Difference]: Without dead ends: 237 [2022-12-14 12:23:27,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:23:27,236 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 324 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:27,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 166 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:23:27,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-12-14 12:23:27,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2022-12-14 12:23:27,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 175 states have (on average 1.697142857142857) internal successors, (297), 227 states have internal predecessors, (297), 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) [2022-12-14 12:23:27,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 309 transitions. [2022-12-14 12:23:27,240 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 309 transitions. Word has length 21 [2022-12-14 12:23:27,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:27,240 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 309 transitions. [2022-12-14 12:23:27,240 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) [2022-12-14 12:23:27,240 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 309 transitions. [2022-12-14 12:23:27,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 12:23:27,240 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:27,240 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] [2022-12-14 12:23:27,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-14 12:23:27,241 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:23:27,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:27,241 INFO L85 PathProgramCache]: Analyzing trace with hash 687371706, now seen corresponding path program 1 times [2022-12-14 12:23:27,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:27,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143224942] [2022-12-14 12:23:27,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:27,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:27,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:27,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:27,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:27,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143224942] [2022-12-14 12:23:27,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143224942] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:27,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:27,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:23:27,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227515547] [2022-12-14 12:23:27,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:27,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:23:27,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:27,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:23:27,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:23:27,288 INFO L87 Difference]: Start difference. First operand 237 states and 309 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 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) [2022-12-14 12:23:27,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:27,463 INFO L93 Difference]: Finished difference Result 543 states and 669 transitions. [2022-12-14 12:23:27,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:23:27,463 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 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 23 [2022-12-14 12:23:27,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:27,466 INFO L225 Difference]: With dead ends: 543 [2022-12-14 12:23:27,466 INFO L226 Difference]: Without dead ends: 543 [2022-12-14 12:23:27,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:23:27,467 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 501 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:27,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 254 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:23:27,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-12-14 12:23:27,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 234. [2022-12-14 12:23:27,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 175 states have (on average 1.6628571428571428) internal successors, (291), 224 states have internal predecessors, (291), 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) [2022-12-14 12:23:27,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 303 transitions. [2022-12-14 12:23:27,471 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 303 transitions. Word has length 23 [2022-12-14 12:23:27,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:27,472 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 303 transitions. [2022-12-14 12:23:27,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 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) [2022-12-14 12:23:27,472 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 303 transitions. [2022-12-14 12:23:27,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 12:23:27,472 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:27,472 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] [2022-12-14 12:23:27,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 12:23:27,472 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:23:27,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:27,473 INFO L85 PathProgramCache]: Analyzing trace with hash 687371707, now seen corresponding path program 1 times [2022-12-14 12:23:27,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:27,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637560934] [2022-12-14 12:23:27,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:27,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:27,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:27,571 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:27,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637560934] [2022-12-14 12:23:27,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637560934] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:27,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:27,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 12:23:27,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024405093] [2022-12-14 12:23:27,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:27,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:23:27,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:27,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:23:27,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:23:27,573 INFO L87 Difference]: Start difference. First operand 234 states and 303 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 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) [2022-12-14 12:23:27,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:27,782 INFO L93 Difference]: Finished difference Result 393 states and 501 transitions. [2022-12-14 12:23:27,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:23:27,782 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 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 23 [2022-12-14 12:23:27,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:27,783 INFO L225 Difference]: With dead ends: 393 [2022-12-14 12:23:27,783 INFO L226 Difference]: Without dead ends: 393 [2022-12-14 12:23:27,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-14 12:23:27,784 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 699 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:27,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [699 Valid, 267 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:23:27,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-12-14 12:23:27,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 233. [2022-12-14 12:23:27,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 175 states have (on average 1.6514285714285715) internal successors, (289), 223 states have internal predecessors, (289), 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) [2022-12-14 12:23:27,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 301 transitions. [2022-12-14 12:23:27,788 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 301 transitions. Word has length 23 [2022-12-14 12:23:27,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:27,788 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 301 transitions. [2022-12-14 12:23:27,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 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) [2022-12-14 12:23:27,788 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 301 transitions. [2022-12-14 12:23:27,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 12:23:27,788 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:27,788 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] [2022-12-14 12:23:27,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-14 12:23:27,788 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:23:27,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:27,789 INFO L85 PathProgramCache]: Analyzing trace with hash 687371868, now seen corresponding path program 1 times [2022-12-14 12:23:27,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:27,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220574548] [2022-12-14 12:23:27,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:27,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:27,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:27,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:27,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220574548] [2022-12-14 12:23:27,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220574548] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:27,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:27,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:23:27,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998767203] [2022-12-14 12:23:27,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:27,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:23:27,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:27,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:23:27,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:23:27,929 INFO L87 Difference]: Start difference. First operand 233 states and 301 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 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) [2022-12-14 12:23:28,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:28,161 INFO L93 Difference]: Finished difference Result 360 states and 411 transitions. [2022-12-14 12:23:28,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:23:28,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 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 23 [2022-12-14 12:23:28,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:28,162 INFO L225 Difference]: With dead ends: 360 [2022-12-14 12:23:28,162 INFO L226 Difference]: Without dead ends: 360 [2022-12-14 12:23:28,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:23:28,163 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 469 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:28,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 205 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:23:28,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-12-14 12:23:28,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 233. [2022-12-14 12:23:28,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 175 states have (on average 1.64) internal successors, (287), 223 states have internal predecessors, (287), 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) [2022-12-14 12:23:28,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 299 transitions. [2022-12-14 12:23:28,166 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 299 transitions. Word has length 23 [2022-12-14 12:23:28,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:28,167 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 299 transitions. [2022-12-14 12:23:28,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 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) [2022-12-14 12:23:28,167 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 299 transitions. [2022-12-14 12:23:28,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 12:23:28,167 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:28,167 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] [2022-12-14 12:23:28,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-14 12:23:28,168 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:23:28,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:28,168 INFO L85 PathProgramCache]: Analyzing trace with hash 586179713, now seen corresponding path program 1 times [2022-12-14 12:23:28,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:28,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547218769] [2022-12-14 12:23:28,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:28,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:28,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:28,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:28,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:28,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547218769] [2022-12-14 12:23:28,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547218769] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:28,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:28,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 12:23:28,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462719089] [2022-12-14 12:23:28,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:28,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:23:28,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:28,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:23:28,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:23:28,314 INFO L87 Difference]: Start difference. First operand 233 states and 299 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 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) [2022-12-14 12:23:28,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:28,472 INFO L93 Difference]: Finished difference Result 231 states and 296 transitions. [2022-12-14 12:23:28,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:23:28,473 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 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 33 [2022-12-14 12:23:28,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:28,474 INFO L225 Difference]: With dead ends: 231 [2022-12-14 12:23:28,474 INFO L226 Difference]: Without dead ends: 231 [2022-12-14 12:23:28,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:23:28,475 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 311 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:28,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 186 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:23:28,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-12-14 12:23:28,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-12-14 12:23:28,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 175 states have (on average 1.6228571428571428) internal successors, (284), 221 states have internal predecessors, (284), 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) [2022-12-14 12:23:28,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 296 transitions. [2022-12-14 12:23:28,480 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 296 transitions. Word has length 33 [2022-12-14 12:23:28,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:28,480 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 296 transitions. [2022-12-14 12:23:28,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 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) [2022-12-14 12:23:28,480 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 296 transitions. [2022-12-14 12:23:28,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 12:23:28,480 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:28,481 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] [2022-12-14 12:23:28,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-14 12:23:28,481 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:23:28,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:28,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1320408141, now seen corresponding path program 1 times [2022-12-14 12:23:28,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:28,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993480664] [2022-12-14 12:23:28,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:28,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:28,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:23:28,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:28,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993480664] [2022-12-14 12:23:28,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993480664] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:28,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:23:28,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 12:23:28,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393762] [2022-12-14 12:23:28,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:28,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:23:28,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:28,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:23:28,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:23:28,618 INFO L87 Difference]: Start difference. First operand 231 states and 296 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 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) [2022-12-14 12:23:28,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:28,779 INFO L93 Difference]: Finished difference Result 276 states and 353 transitions. [2022-12-14 12:23:28,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:23:28,780 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 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 34 [2022-12-14 12:23:28,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:28,780 INFO L225 Difference]: With dead ends: 276 [2022-12-14 12:23:28,780 INFO L226 Difference]: Without dead ends: 276 [2022-12-14 12:23:28,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-12-14 12:23:28,781 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 275 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:28,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 198 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:23:28,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-12-14 12:23:28,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 229. [2022-12-14 12:23:28,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 175 states have (on average 1.6) internal successors, (280), 219 states have internal predecessors, (280), 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) [2022-12-14 12:23:28,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 292 transitions. [2022-12-14 12:23:28,785 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 292 transitions. Word has length 34 [2022-12-14 12:23:28,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:28,786 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 292 transitions. [2022-12-14 12:23:28,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 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) [2022-12-14 12:23:28,786 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 292 transitions. [2022-12-14 12:23:28,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 12:23:28,786 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:28,787 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2022-12-14 12:23:28,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-14 12:23:28,787 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:23:28,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:28,787 INFO L85 PathProgramCache]: Analyzing trace with hash -371331156, now seen corresponding path program 1 times [2022-12-14 12:23:28,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:28,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286417670] [2022-12-14 12:23:28,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:28,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:30,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:23:30,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:30,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286417670] [2022-12-14 12:23:30,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286417670] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:23:30,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716817149] [2022-12-14 12:23:30,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:30,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:23:30,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:23:30,191 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:23:30,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:23:30,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:30,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 76 conjunts are in the unsatisfiable core [2022-12-14 12:23:30,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:23:30,507 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 12:23:30,508 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 [2022-12-14 12:23:30,673 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 [2022-12-14 12:23:30,678 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 [2022-12-14 12:23:30,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:30,829 INFO L321 Elim1Store]: treesize reduction 40, result has 49.4 percent of original size [2022-12-14 12:23:30,829 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 69 treesize of output 87 [2022-12-14 12:23:30,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:30,854 INFO L321 Elim1Store]: treesize reduction 40, result has 49.4 percent of original size [2022-12-14 12:23:30,854 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 2 case distinctions, treesize of input 53 treesize of output 71 [2022-12-14 12:23:31,011 INFO L321 Elim1Store]: treesize reduction 60, result has 27.7 percent of original size [2022-12-14 12:23:31,011 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 3 case distinctions, treesize of input 36 treesize of output 38 [2022-12-14 12:23:31,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:31,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:31,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:31,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-12-14 12:23:31,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2022-12-14 12:23:31,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2022-12-14 12:23:31,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:31,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2022-12-14 12:23:31,146 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 12:23:31,146 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 34 treesize of output 10 [2022-12-14 12:23:31,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:31,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:23:31,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716817149] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:23:31,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:23:31,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [15] total 26 [2022-12-14 12:23:31,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913500856] [2022-12-14 12:23:31,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:23:31,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 12:23:31,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:31,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 12:23:31,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=593, Unknown=0, NotChecked=0, Total=650 [2022-12-14 12:23:31,173 INFO L87 Difference]: Start difference. First operand 229 states and 292 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 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) [2022-12-14 12:23:32,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:32,442 INFO L93 Difference]: Finished difference Result 560 states and 634 transitions. [2022-12-14 12:23:32,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 12:23:32,443 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 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 35 [2022-12-14 12:23:32,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:32,444 INFO L225 Difference]: With dead ends: 560 [2022-12-14 12:23:32,444 INFO L226 Difference]: Without dead ends: 560 [2022-12-14 12:23:32,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=160, Invalid=1100, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 12:23:32,445 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 585 mSDsluCounter, 1345 mSDsCounter, 0 mSdLazyCounter, 1227 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1520 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:32,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 1520 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1227 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 12:23:32,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-12-14 12:23:32,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 232. [2022-12-14 12:23:32,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 178 states have (on average 1.5898876404494382) internal successors, (283), 222 states have internal predecessors, (283), 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) [2022-12-14 12:23:32,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 295 transitions. [2022-12-14 12:23:32,448 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 295 transitions. Word has length 35 [2022-12-14 12:23:32,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:32,449 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 295 transitions. [2022-12-14 12:23:32,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 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) [2022-12-14 12:23:32,449 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 295 transitions. [2022-12-14 12:23:32,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 12:23:32,449 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:32,449 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2022-12-14 12:23:32,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:23:32,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-14 12:23:32,651 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:23:32,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:32,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1123560135, now seen corresponding path program 1 times [2022-12-14 12:23:32,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:32,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267598408] [2022-12-14 12:23:32,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:32,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:32,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:34,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:23:34,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:34,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267598408] [2022-12-14 12:23:34,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267598408] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:23:34,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967176278] [2022-12-14 12:23:34,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:34,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:23:34,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:23:34,158 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:23:34,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 12:23:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:34,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 98 conjunts are in the unsatisfiable core [2022-12-14 12:23:34,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:23:34,315 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 12:23:34,316 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 [2022-12-14 12:23:34,453 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 16 treesize of output 18 [2022-12-14 12:23:34,459 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 16 treesize of output 18 [2022-12-14 12:23:34,498 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 16 treesize of output 18 [2022-12-14 12:23:34,506 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 16 treesize of output 18 [2022-12-14 12:23:34,522 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 16 treesize of output 18 [2022-12-14 12:23:34,529 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 16 treesize of output 18 [2022-12-14 12:23:34,601 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-12-14 12:23:34,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2022-12-14 12:23:34,611 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-12-14 12:23:34,611 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 21 treesize of output 26 [2022-12-14 12:23:34,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:34,755 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 52 treesize of output 51 [2022-12-14 12:23:34,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:34,770 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2022-12-14 12:23:34,771 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 52 treesize of output 56 [2022-12-14 12:23:35,355 INFO L321 Elim1Store]: treesize reduction 126, result has 42.2 percent of original size [2022-12-14 12:23:35,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 152 treesize of output 218 [2022-12-14 12:23:35,952 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:23:35,952 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 239 treesize of output 232 [2022-12-14 12:23:36,707 INFO L321 Elim1Store]: treesize reduction 28, result has 82.8 percent of original size [2022-12-14 12:23:36,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 177 treesize of output 225 [2022-12-14 12:23:47,910 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:47,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:23:48,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967176278] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:23:48,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1007204232] [2022-12-14 12:23:48,221 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2022-12-14 12:23:48,221 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:23:48,224 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:23:48,227 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:23:48,228 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:23:48,381 INFO L321 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2022-12-14 12:23:48,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 214 treesize of output 216 [2022-12-14 12:23:48,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:48,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:23:48,610 INFO L321 Elim1Store]: treesize reduction 127, result has 11.8 percent of original size [2022-12-14 12:23:48,611 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 5 case distinctions, treesize of input 253 treesize of output 237 [2022-12-14 12:23:48,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:48,644 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-12-14 12:23:48,644 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 1 case distinctions, treesize of input 247 treesize of output 222 [2022-12-14 12:23:48,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:48,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:23:48,688 INFO L321 Elim1Store]: treesize reduction 127, result has 11.8 percent of original size [2022-12-14 12:23:48,688 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 5 case distinctions, treesize of input 253 treesize of output 237 [2022-12-14 12:23:48,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:48,817 INFO L321 Elim1Store]: treesize reduction 132, result has 17.5 percent of original size [2022-12-14 12:23:48,818 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 5 case distinctions, treesize of input 250 treesize of output 245 [2022-12-14 12:23:48,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:48,867 INFO L321 Elim1Store]: treesize reduction 132, result has 17.5 percent of original size [2022-12-14 12:23:48,868 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 5 case distinctions, treesize of input 250 treesize of output 245 [2022-12-14 12:23:48,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:48,892 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-12-14 12:23:48,893 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 1 case distinctions, treesize of input 247 treesize of output 222 [2022-12-14 12:23:48,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:48,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:48,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:48,998 INFO L321 Elim1Store]: treesize reduction 140, result has 14.1 percent of original size [2022-12-14 12:23:48,998 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 7 case distinctions, treesize of input 265 treesize of output 248 [2022-12-14 12:23:49,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:49,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:49,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:49,045 INFO L321 Elim1Store]: treesize reduction 140, result has 14.1 percent of original size [2022-12-14 12:23:49,046 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 7 case distinctions, treesize of input 265 treesize of output 248 [2022-12-14 12:23:49,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:49,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:49,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 231 [2022-12-14 12:23:49,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:49,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:49,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:49,180 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-12-14 12:23:49,180 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 3 case distinctions, treesize of input 248 treesize of output 234 [2022-12-14 12:23:49,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:49,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:23:49,246 INFO L321 Elim1Store]: treesize reduction 190, result has 17.0 percent of original size [2022-12-14 12:23:49,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 257 treesize of output 255 [2022-12-14 12:23:49,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:49,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:23:49,316 INFO L321 Elim1Store]: treesize reduction 180, result has 21.4 percent of original size [2022-12-14 12:23:49,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 257 treesize of output 265 [2022-12-14 12:23:49,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:23:49,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:49,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:23:49,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:23:49,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:23:49,726 INFO L321 Elim1Store]: treesize reduction 294, result has 12.2 percent of original size [2022-12-14 12:23:49,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 498 treesize of output 483 [2022-12-14 12:23:49,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:49,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:49,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:49,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:49,764 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:23:49,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 459 treesize of output 421 [2022-12-14 12:23:49,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:23:49,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:49,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:23:49,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:23:49,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:23:49,833 INFO L321 Elim1Store]: treesize reduction 312, result has 6.9 percent of original size [2022-12-14 12:23:49,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 482 treesize of output 437 [2022-12-14 12:23:50,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 12:23:50,610 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 [2022-12-14 12:23:50,698 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 12:23:50,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-12-14 12:23:50,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-12-14 12:23:50,728 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 12:23:50,728 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 1 case distinctions, treesize of input 30 treesize of output 25 [2022-12-14 12:23:50,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:23:50,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:23:50,803 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 15 treesize of output 11 [2022-12-14 12:23:50,835 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 12:23:50,835 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 31 treesize of output 21 [2022-12-14 12:23:50,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:23:50,867 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 12:23:50,867 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 31 treesize of output 21 [2022-12-14 12:23:50,938 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-12-14 12:23:50,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 12:23:50,960 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 12:23:50,961 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 29 treesize of output 40 [2022-12-14 12:23:50,993 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 12:23:50,994 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 29 treesize of output 40 [2022-12-14 12:23:51,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:23:51,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:23:51,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:23:51,121 INFO L321 Elim1Store]: treesize reduction 136, result has 18.1 percent of original size [2022-12-14 12:23:51,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 67 [2022-12-14 12:23:51,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:23:51,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:23:51,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:23:51,189 INFO L321 Elim1Store]: treesize reduction 107, result has 35.5 percent of original size [2022-12-14 12:23:51,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 96 [2022-12-14 12:23:51,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:51,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2022-12-14 12:23:52,729 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 [2022-12-14 12:23:52,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 12:23:52,826 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 12:23:52,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-12-14 12:23:52,850 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 12:23:52,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-12-14 12:23:52,861 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 [2022-12-14 12:23:52,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:23:52,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:23:52,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:23:52,938 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 12:23:52,938 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 31 treesize of output 21 [2022-12-14 12:23:52,952 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 12:23:52,952 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 31 treesize of output 21 [2022-12-14 12:23:52,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:23:53,012 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 12:23:53,012 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 29 treesize of output 40 [2022-12-14 12:23:53,039 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-12-14 12:23:53,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 12:23:53,064 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 12:23:53,064 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 29 treesize of output 40 [2022-12-14 12:23:53,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:23:53,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:23:53,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:23:53,194 INFO L321 Elim1Store]: treesize reduction 107, result has 35.5 percent of original size [2022-12-14 12:23:53,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 96 [2022-12-14 12:23:53,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:23:53,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:23:53,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:23:53,264 INFO L321 Elim1Store]: treesize reduction 136, result has 18.1 percent of original size [2022-12-14 12:23:53,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 67 [2022-12-14 12:23:53,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:53,283 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 23 [2022-12-14 12:23:53,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 12:23:53,790 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 [2022-12-14 12:23:53,948 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 17 for LOIs [2022-12-14 12:23:53,954 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:24:00,245 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18458#(and (<= |ULTIMATE.start_create_item_#in~cursor#1.offset| 8589934588) (<= |~#list~0.base| 3) (<= 3 |ULTIMATE.start_create_item_#in~cursor#1.base|) (<= 3 |ULTIMATE.start_create_item_~cursor#1.base|) (<= (+ |ULTIMATE.start_create_item_~cursor#1.offset| 4) (select |#length| |ULTIMATE.start_create_item_~cursor#1.base|)) (<= |ULTIMATE.start_main_#t~ret30#1| 2147483647) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_append_one_#in~to#1| 2147483647) (<= |ULTIMATE.start_create_item_#in~at#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_#t~ret30#1| 2147483648)) (<= |ULTIMATE.start_append_one_~to#1| 2147483647) (<= |ULTIMATE.start_append_one_~list#1.base| 3) (<= 0 |ULTIMATE.start_append_one_~cursor~0#1.offset|) (<= |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) (= (select |#valid| |ULTIMATE.start_create_item_~cursor#1.base|) 1) (<= 3 |ULTIMATE.start_append_one_~cursor~0#1.base|) (<= |ULTIMATE.start_create_item_~cursor#1.base| 3) (<= 0 (+ 2147483648 |ULTIMATE.start_append_one_~to#1|)) (<= 0 |ULTIMATE.start_create_item_~cursor#1.offset|) (not (= (select |#valid| |ULTIMATE.start_create_item_#t~mem7#1.base|) 1)) (<= |ULTIMATE.start_append_one_~cursor~0#1.base| 3) (<= |#NULL.offset| 0) (= |ULTIMATE.start_create_item_~item~0#1.offset| 0) (<= |ULTIMATE.start_create_item_~at#1| 2147483647) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_create_item_~cursor#1.base|) |ULTIMATE.start_create_item_~cursor#1.offset|) |ULTIMATE.start_create_item_#t~mem7#1.offset|) (<= 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|) (<= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_create_item_~at#1| 2147483648)) |ULTIMATE.start_create_item_#t~short10#1| (<= |ULTIMATE.start_append_one_~cursor~0#1.offset| 8589934588) (<= |ULTIMATE.start_create_item_#in~cursor#1.base| 3) (<= 0 |ULTIMATE.start_create_item_#in~cursor#1.offset|) (<= 0 (+ |ULTIMATE.start_create_item_#in~at#1| 2147483648)) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_create_item_~cursor#1.offset| 8589934588) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_item_~cursor#1.base|) |ULTIMATE.start_create_item_~cursor#1.offset|) |ULTIMATE.start_create_item_#t~mem7#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_append_one_#in~list#1.base| 3) (<= |~#list~0.offset| 0) (<= 3 |ULTIMATE.start_append_one_#in~list#1.base|))' at error location [2022-12-14 12:24:00,245 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:24:00,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:24:00,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 26 [2022-12-14 12:24:00,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902903028] [2022-12-14 12:24:00,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:24:00,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 12:24:00,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:24:00,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 12:24:00,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=2652, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 12:24:00,247 INFO L87 Difference]: Start difference. First operand 232 states and 295 transitions. Second operand has 27 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 25 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 12:24:07,361 WARN L233 SmtUtils]: Spent 5.94s on a formula simplification. DAG size of input: 104 DAG size of output: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:24:24,839 WARN L233 SmtUtils]: Spent 5.18s on a formula simplification. DAG size of input: 76 DAG size of output: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:24:30,281 WARN L233 SmtUtils]: Spent 5.15s on a formula simplification. DAG size of input: 79 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:24:31,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:24:31,341 INFO L93 Difference]: Finished difference Result 503 states and 600 transitions. [2022-12-14 12:24:31,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-14 12:24:31,341 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 25 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 36 [2022-12-14 12:24:31,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:24:31,342 INFO L225 Difference]: With dead ends: 503 [2022-12-14 12:24:31,342 INFO L226 Difference]: Without dead ends: 503 [2022-12-14 12:24:31,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1871 ImplicationChecksByTransitivity, 36.7s TimeCoverageRelationStatistics Valid=630, Invalid=6176, Unknown=0, NotChecked=0, Total=6806 [2022-12-14 12:24:31,344 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 1025 mSDsluCounter, 1532 mSDsCounter, 0 mSdLazyCounter, 2089 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1028 SdHoareTripleChecker+Valid, 1625 SdHoareTripleChecker+Invalid, 2152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:24:31,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1028 Valid, 1625 Invalid, 2152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2089 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 12:24:31,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-12-14 12:24:31,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 270. [2022-12-14 12:24:31,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 213 states have (on average 1.5305164319248827) internal successors, (326), 257 states have internal predecessors, (326), 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) [2022-12-14 12:24:31,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 342 transitions. [2022-12-14 12:24:31,348 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 342 transitions. Word has length 36 [2022-12-14 12:24:31,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:24:31,348 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 342 transitions. [2022-12-14 12:24:31,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 25 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 12:24:31,348 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 342 transitions. [2022-12-14 12:24:31,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 12:24:31,348 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:24:31,348 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2022-12-14 12:24:31,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 12:24:31,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-14 12:24:31,550 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:24:31,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:24:31,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1123560136, now seen corresponding path program 1 times [2022-12-14 12:24:31,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:24:31,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152519372] [2022-12-14 12:24:31,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:24:31,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:24:31,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:24:33,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:24:33,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:24:33,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152519372] [2022-12-14 12:24:33,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152519372] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:24:33,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338898723] [2022-12-14 12:24:33,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:24:33,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:24:33,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:24:33,802 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:24:33,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 12:24:33,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:24:33,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 134 conjunts are in the unsatisfiable core [2022-12-14 12:24:33,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:24:34,049 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 [2022-12-14 12:24:34,061 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 12:24:34,061 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 [2022-12-14 12:24:34,271 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 16 treesize of output 18 [2022-12-14 12:24:34,279 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 16 treesize of output 18 [2022-12-14 12:24:34,351 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 16 treesize of output 18 [2022-12-14 12:24:34,363 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 16 treesize of output 18 [2022-12-14 12:24:34,383 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 16 treesize of output 18 [2022-12-14 12:24:34,392 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 16 treesize of output 18 [2022-12-14 12:24:34,525 INFO L321 Elim1Store]: treesize reduction 22, result has 47.6 percent of original size [2022-12-14 12:24:34,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 12:24:34,535 INFO L321 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-12-14 12:24:34,535 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 26 [2022-12-14 12:24:34,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:34,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:24:34,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 43 [2022-12-14 12:24:34,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:34,758 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 75 treesize of output 66 [2022-12-14 12:24:35,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:35,259 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 25 treesize of output 27 [2022-12-14 12:24:35,267 INFO L321 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2022-12-14 12:24:35,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 12:24:35,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:24:35,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:35,479 INFO L321 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2022-12-14 12:24:35,479 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 23 [2022-12-14 12:24:35,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:35,489 INFO L321 Elim1Store]: treesize reduction 20, result has 13.0 percent of original size [2022-12-14 12:24:35,490 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 26 treesize of output 13 [2022-12-14 12:24:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:24:35,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:24:39,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338898723] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:24:39,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [454966925] [2022-12-14 12:24:39,052 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2022-12-14 12:24:39,052 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:24:39,053 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:24:39,053 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:24:39,053 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:24:39,174 INFO L321 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2022-12-14 12:24:39,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 214 treesize of output 216 [2022-12-14 12:24:39,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:39,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:24:39,364 INFO L321 Elim1Store]: treesize reduction 127, result has 11.8 percent of original size [2022-12-14 12:24:39,364 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 5 case distinctions, treesize of input 253 treesize of output 237 [2022-12-14 12:24:39,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:39,395 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-12-14 12:24:39,395 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 1 case distinctions, treesize of input 247 treesize of output 222 [2022-12-14 12:24:39,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:39,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:24:39,431 INFO L321 Elim1Store]: treesize reduction 127, result has 11.8 percent of original size [2022-12-14 12:24:39,432 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 5 case distinctions, treesize of input 253 treesize of output 237 [2022-12-14 12:24:39,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:39,540 INFO L321 Elim1Store]: treesize reduction 132, result has 17.5 percent of original size [2022-12-14 12:24:39,540 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 5 case distinctions, treesize of input 250 treesize of output 245 [2022-12-14 12:24:39,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:39,567 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-12-14 12:24:39,567 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 1 case distinctions, treesize of input 247 treesize of output 222 [2022-12-14 12:24:39,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:39,612 INFO L321 Elim1Store]: treesize reduction 132, result has 17.5 percent of original size [2022-12-14 12:24:39,612 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 5 case distinctions, treesize of input 250 treesize of output 245 [2022-12-14 12:24:39,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:39,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:39,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:39,722 INFO L321 Elim1Store]: treesize reduction 140, result has 14.1 percent of original size [2022-12-14 12:24:39,722 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 7 case distinctions, treesize of input 265 treesize of output 248 [2022-12-14 12:24:39,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:39,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:39,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 231 [2022-12-14 12:24:39,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:39,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:39,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:39,783 INFO L321 Elim1Store]: treesize reduction 140, result has 14.1 percent of original size [2022-12-14 12:24:39,783 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 7 case distinctions, treesize of input 265 treesize of output 248 [2022-12-14 12:24:39,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:39,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:24:39,936 INFO L321 Elim1Store]: treesize reduction 190, result has 17.0 percent of original size [2022-12-14 12:24:39,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 257 treesize of output 255 [2022-12-14 12:24:39,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:39,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:39,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:39,968 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-12-14 12:24:39,968 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 3 case distinctions, treesize of input 248 treesize of output 234 [2022-12-14 12:24:39,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:39,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:24:40,031 INFO L321 Elim1Store]: treesize reduction 180, result has 21.4 percent of original size [2022-12-14 12:24:40,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 257 treesize of output 265 [2022-12-14 12:24:40,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:24:40,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:40,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:24:40,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:24:40,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:24:40,412 INFO L321 Elim1Store]: treesize reduction 312, result has 6.9 percent of original size [2022-12-14 12:24:40,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 703 treesize of output 638 [2022-12-14 12:24:40,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:24:40,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:40,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:24:40,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:24:40,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:24:40,503 INFO L321 Elim1Store]: treesize reduction 294, result has 12.2 percent of original size [2022-12-14 12:24:40,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 679 treesize of output 652 [2022-12-14 12:24:40,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:40,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:40,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:40,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:40,547 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:24:40,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 640 treesize of output 586 [2022-12-14 12:24:41,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 12:24:41,408 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 [2022-12-14 12:24:41,494 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 12:24:41,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-12-14 12:24:41,514 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 12:24:41,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-12-14 12:24:41,529 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 [2022-12-14 12:24:41,567 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 23 treesize of output 1 [2022-12-14 12:24:41,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:24:41,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:24:41,610 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 12:24:41,610 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 31 treesize of output 21 [2022-12-14 12:24:41,627 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 12:24:41,627 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 31 treesize of output 21 [2022-12-14 12:24:41,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:24:41,687 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 12:24:41,687 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 29 treesize of output 40 [2022-12-14 12:24:41,722 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 12:24:41,722 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 29 treesize of output 40 [2022-12-14 12:24:41,762 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-12-14 12:24:41,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 12:24:41,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:24:41,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:24:41,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:24:41,881 INFO L321 Elim1Store]: treesize reduction 107, result has 35.5 percent of original size [2022-12-14 12:24:41,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 96 [2022-12-14 12:24:41,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:24:41,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:24:41,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:24:41,939 INFO L321 Elim1Store]: treesize reduction 136, result has 18.1 percent of original size [2022-12-14 12:24:41,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 67 [2022-12-14 12:24:41,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:41,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2022-12-14 12:24:43,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 12:24:43,475 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 [2022-12-14 12:24:43,551 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 12:24:43,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-12-14 12:24:43,575 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 12:24:43,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-12-14 12:24:43,588 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 [2022-12-14 12:24:43,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:24:43,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:24:43,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:24:43,672 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 12:24:43,672 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 31 treesize of output 21 [2022-12-14 12:24:43,693 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 12:24:43,693 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 31 treesize of output 21 [2022-12-14 12:24:43,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:24:43,766 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 12:24:43,766 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 29 treesize of output 40 [2022-12-14 12:24:43,794 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-12-14 12:24:43,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 12:24:43,824 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 12:24:43,825 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 29 treesize of output 40 [2022-12-14 12:24:43,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:43,907 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 23 [2022-12-14 12:24:43,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:24:43,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:24:43,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:24:43,975 INFO L321 Elim1Store]: treesize reduction 107, result has 35.5 percent of original size [2022-12-14 12:24:43,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 96 [2022-12-14 12:24:43,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:24:44,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:24:44,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:24:44,038 INFO L321 Elim1Store]: treesize reduction 136, result has 18.1 percent of original size [2022-12-14 12:24:44,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 67 [2022-12-14 12:24:44,536 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 [2022-12-14 12:24:44,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 12:24:44,688 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 17 for LOIs [2022-12-14 12:24:44,694 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:24:52,232 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19473#(and (<= |~#list~0.base| 3) (= |~#list~0.offset| |ULTIMATE.start_append_one_#in~list#1.offset|) (<= (+ |ULTIMATE.start_create_item_~cursor#1.offset| 4) (select |#length| |ULTIMATE.start_create_item_~cursor#1.base|)) (<= |ULTIMATE.start_main_#t~ret30#1| 2147483647) (< |ULTIMATE.start_create_item_~item~0#1.base| |#StackHeapBarrier|) (not (= |ULTIMATE.start_create_item_~item~0#1.base| 0)) (<= 0 |#NULL.base|) (= |ULTIMATE.start_append_one_~cursor~0#1.offset| |ULTIMATE.start_create_item_#in~cursor#1.offset|) (= (select |#valid| |ULTIMATE.start_create_item_~cursor#1.base|) 1) (or (not (= |ULTIMATE.start_create_item_#t~mem8#1.offset| 0)) (not (= |ULTIMATE.start_create_item_#t~mem8#1.base| 0))) (= |ULTIMATE.start_create_item_#in~at#1| |ULTIMATE.start_append_one_~to#1|) (<= 0 |ULTIMATE.start_create_item_~cursor#1.offset|) (= |ULTIMATE.start_create_item_~cursor#1.offset| |ULTIMATE.start_create_item_#in~cursor#1.offset|) (= |ULTIMATE.start_create_item_~cursor#1.base| |ULTIMATE.start_create_item_#in~cursor#1.base|) (= 265 (select |#length| |ULTIMATE.start_create_item_~item~0#1.base|)) (<= |#NULL.offset| 0) (= |ULTIMATE.start_create_item_~item~0#1.offset| 0) (or (and (not (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_create_item_~at#1|)) (or (and (= ~unnamed2~0~ITEM_PREV |ULTIMATE.start_create_item_~link_field~0#1|) (= |ULTIMATE.start_create_item_~term_field~0#1| ~unnamed2~0~ITEM_NEXT)) (not (= ~unnamed1~0~LIST_END |ULTIMATE.start_create_item_~at#1|)))) (and (= |ULTIMATE.start_create_item_~term_field~0#1| ~unnamed2~0~ITEM_PREV) (= ~unnamed2~0~ITEM_NEXT |ULTIMATE.start_create_item_~link_field~0#1|) (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_create_item_~at#1|))) (= |ULTIMATE.start_create_item_#t~mem8#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_item_~cursor#1.base|) |ULTIMATE.start_create_item_~cursor#1.offset|)) (= |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|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_create_item_~cursor#1.base|) |ULTIMATE.start_create_item_~cursor#1.offset|) |ULTIMATE.start_create_item_#t~mem7#1.offset|) (= |ULTIMATE.start_create_item_~at#1| |ULTIMATE.start_create_item_#in~at#1|) (= |ULTIMATE.start_append_one_~cursor~0#1.base| |ULTIMATE.start_append_one_~list#1.base|) (= |ULTIMATE.start_append_one_#in~to#1| |ULTIMATE.start_append_one_~to#1|) (<= |#NULL.base| 0) |ULTIMATE.start_create_item_#t~short10#1| (= |ULTIMATE.start_append_one_~cursor~0#1.offset| (+ (* 4 |ULTIMATE.start_append_one_~to#1|) |ULTIMATE.start_append_one_~list#1.offset|)) (or (not (<= 0 (+ (* 4 |ULTIMATE.start_create_item_~link_field~0#1|) |ULTIMATE.start_create_item_#t~mem7#1.offset|))) (not (<= (+ (* 4 |ULTIMATE.start_create_item_~link_field~0#1|) |ULTIMATE.start_create_item_#t~mem7#1.offset| 4) (select |#length| |ULTIMATE.start_create_item_#t~mem7#1.base|)))) (= |ULTIMATE.start_append_one_#in~list#1.base| |~#list~0.base|) (= 1 (select |#valid| |ULTIMATE.start_create_item_~item~0#1.base|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_create_item_~cursor#1.base|) |ULTIMATE.start_create_item_~cursor#1.offset|) |ULTIMATE.start_create_item_#t~mem8#1.offset|) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_item_~cursor#1.base|) |ULTIMATE.start_create_item_~cursor#1.offset|) |ULTIMATE.start_create_item_#t~mem7#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_append_one_#in~to#1| |ULTIMATE.start_main_#t~ret30#1|) (<= |~#list~0.offset| 0) (= |ULTIMATE.start_append_one_~cursor~0#1.base| |ULTIMATE.start_create_item_#in~cursor#1.base|))' at error location [2022-12-14 12:24:52,232 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:24:52,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:24:52,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 31 [2022-12-14 12:24:52,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190683159] [2022-12-14 12:24:52,233 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:24:52,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 12:24:52,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:24:52,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 12:24:52,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=3419, Unknown=0, NotChecked=0, Total=3660 [2022-12-14 12:24:52,236 INFO L87 Difference]: Start difference. First operand 270 states and 342 transitions. Second operand has 32 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 29 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) [2022-12-14 12:24:57,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:24:57,632 INFO L93 Difference]: Finished difference Result 569 states and 675 transitions. [2022-12-14 12:24:57,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 12:24:57,632 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 29 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 [2022-12-14 12:24:57,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:24:57,633 INFO L225 Difference]: With dead ends: 569 [2022-12-14 12:24:57,633 INFO L226 Difference]: Without dead ends: 569 [2022-12-14 12:24:57,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1965 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=551, Invalid=6091, Unknown=0, NotChecked=0, Total=6642 [2022-12-14 12:24:57,635 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 1591 mSDsluCounter, 1670 mSDsCounter, 0 mSdLazyCounter, 2483 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1594 SdHoareTripleChecker+Valid, 1758 SdHoareTripleChecker+Invalid, 2593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:24:57,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1594 Valid, 1758 Invalid, 2593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2483 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 12:24:57,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-12-14 12:24:57,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 270. [2022-12-14 12:24:57,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 213 states have (on average 1.5258215962441315) internal successors, (325), 257 states have internal predecessors, (325), 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) [2022-12-14 12:24:57,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 341 transitions. [2022-12-14 12:24:57,639 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 341 transitions. Word has length 36 [2022-12-14 12:24:57,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:24:57,639 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 341 transitions. [2022-12-14 12:24:57,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 29 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) [2022-12-14 12:24:57,639 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 341 transitions. [2022-12-14 12:24:57,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 12:24:57,639 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:24:57,639 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] [2022-12-14 12:24:57,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 12:24:57,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:24:57,840 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:24:57,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:24:57,840 INFO L85 PathProgramCache]: Analyzing trace with hash -2122044158, now seen corresponding path program 1 times [2022-12-14 12:24:57,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:24:57,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341250244] [2022-12-14 12:24:57,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:24:57,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:24:57,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:24:58,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:24:58,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:24:58,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341250244] [2022-12-14 12:24:58,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341250244] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:24:58,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253368151] [2022-12-14 12:24:58,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:24:58,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:24:58,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:24:58,670 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:24:58,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 12:24:58,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:24:58,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 73 conjunts are in the unsatisfiable core [2022-12-14 12:24:58,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:24:58,864 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 12:24:58,864 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 [2022-12-14 12:24:59,020 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 16 treesize of output 18 [2022-12-14 12:24:59,033 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 16 treesize of output 18 [2022-12-14 12:24:59,070 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 16 treesize of output 18 [2022-12-14 12:24:59,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 12:24:59,104 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 16 treesize of output 18 [2022-12-14 12:24:59,115 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 16 treesize of output 18 [2022-12-14 12:24:59,185 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-12-14 12:24:59,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2022-12-14 12:24:59,193 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-12-14 12:24:59,193 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 21 treesize of output 20 [2022-12-14 12:24:59,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:59,359 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2022-12-14 12:24:59,360 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 50 treesize of output 54 [2022-12-14 12:24:59,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:59,378 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2022-12-14 12:24:59,379 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 2 case distinctions, treesize of input 71 treesize of output 81 [2022-12-14 12:24:59,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:59,650 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:24:59,650 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 42 [2022-12-14 12:24:59,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:59,659 INFO L321 Elim1Store]: treesize reduction 20, result has 13.0 percent of original size [2022-12-14 12:24:59,659 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 26 treesize of output 13 [2022-12-14 12:24:59,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:24:59,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:25:01,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253368151] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:25:01,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [650269811] [2022-12-14 12:25:01,682 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-12-14 12:25:01,682 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:25:01,682 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:25:01,682 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:25:01,683 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:25:01,832 INFO L321 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2022-12-14 12:25:01,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 214 treesize of output 216 [2022-12-14 12:25:01,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:01,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:02,027 INFO L321 Elim1Store]: treesize reduction 127, result has 11.8 percent of original size [2022-12-14 12:25:02,028 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 5 case distinctions, treesize of input 253 treesize of output 237 [2022-12-14 12:25:02,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:02,060 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-12-14 12:25:02,061 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 1 case distinctions, treesize of input 247 treesize of output 222 [2022-12-14 12:25:02,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:02,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:02,109 INFO L321 Elim1Store]: treesize reduction 127, result has 11.8 percent of original size [2022-12-14 12:25:02,110 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 5 case distinctions, treesize of input 253 treesize of output 237 [2022-12-14 12:25:02,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:02,235 INFO L321 Elim1Store]: treesize reduction 132, result has 17.5 percent of original size [2022-12-14 12:25:02,235 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 5 case distinctions, treesize of input 250 treesize of output 245 [2022-12-14 12:25:02,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:02,263 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-12-14 12:25:02,264 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 1 case distinctions, treesize of input 247 treesize of output 222 [2022-12-14 12:25:02,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:02,302 INFO L321 Elim1Store]: treesize reduction 132, result has 17.5 percent of original size [2022-12-14 12:25:02,302 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 5 case distinctions, treesize of input 250 treesize of output 245 [2022-12-14 12:25:02,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:02,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:02,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:02,405 INFO L321 Elim1Store]: treesize reduction 140, result has 14.1 percent of original size [2022-12-14 12:25:02,405 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 7 case distinctions, treesize of input 265 treesize of output 248 [2022-12-14 12:25:02,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:02,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:02,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 231 [2022-12-14 12:25:02,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:02,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:02,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:02,458 INFO L321 Elim1Store]: treesize reduction 140, result has 14.1 percent of original size [2022-12-14 12:25:02,458 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 7 case distinctions, treesize of input 265 treesize of output 248 [2022-12-14 12:25:02,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:02,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:02,632 INFO L321 Elim1Store]: treesize reduction 190, result has 17.0 percent of original size [2022-12-14 12:25:02,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 257 treesize of output 255 [2022-12-14 12:25:02,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:02,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:02,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:02,674 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-12-14 12:25:02,674 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 3 case distinctions, treesize of input 248 treesize of output 234 [2022-12-14 12:25:02,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:02,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:02,756 INFO L321 Elim1Store]: treesize reduction 180, result has 21.4 percent of original size [2022-12-14 12:25:02,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 257 treesize of output 265 [2022-12-14 12:25:02,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:02,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:02,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:02,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:02,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:03,018 INFO L321 Elim1Store]: treesize reduction 294, result has 12.2 percent of original size [2022-12-14 12:25:03,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 299 treesize of output 292 [2022-12-14 12:25:03,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:03,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:03,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:03,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:03,053 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:25:03,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 268 treesize of output 246 [2022-12-14 12:25:03,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:03,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:03,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:03,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:03,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:03,122 INFO L321 Elim1Store]: treesize reduction 312, result has 6.9 percent of original size [2022-12-14 12:25:03,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 291 treesize of output 266 [2022-12-14 12:25:03,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 12:25:03,929 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 [2022-12-14 12:25:04,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:04,034 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 30 treesize of output 25 [2022-12-14 12:25:04,046 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 [2022-12-14 12:25:04,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:04,064 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 30 treesize of output 25 [2022-12-14 12:25:04,120 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 [2022-12-14 12:25:04,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 12:25:04,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:25:04,177 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 12:25:04,177 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 31 treesize of output 21 [2022-12-14 12:25:04,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:25:04,210 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 12:25:04,210 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 31 treesize of output 21 [2022-12-14 12:25:04,271 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 12:25:04,271 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 1 case distinctions, treesize of input 29 treesize of output 40 [2022-12-14 12:25:04,309 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-12-14 12:25:04,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 12:25:04,349 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 12:25:04,350 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 29 treesize of output 40 [2022-12-14 12:25:04,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:04,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:04,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:04,490 INFO L321 Elim1Store]: treesize reduction 107, result has 35.5 percent of original size [2022-12-14 12:25:04,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 96 [2022-12-14 12:25:04,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:04,522 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 23 [2022-12-14 12:25:04,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:04,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:04,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:04,587 INFO L321 Elim1Store]: treesize reduction 136, result has 18.1 percent of original size [2022-12-14 12:25:04,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 67 [2022-12-14 12:25:06,845 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 [2022-12-14 12:25:06,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 12:25:06,935 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 [2022-12-14 12:25:06,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:06,946 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 30 treesize of output 25 [2022-12-14 12:25:06,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:06,966 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 30 treesize of output 25 [2022-12-14 12:25:06,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:25:07,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:25:07,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 12:25:07,055 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 12:25:07,055 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 31 treesize of output 21 [2022-12-14 12:25:07,078 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 12:25:07,079 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 31 treesize of output 21 [2022-12-14 12:25:07,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:25:07,159 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 12:25:07,159 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 29 treesize of output 40 [2022-12-14 12:25:07,199 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 12:25:07,199 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 29 treesize of output 40 [2022-12-14 12:25:07,237 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-12-14 12:25:07,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 12:25:07,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:07,319 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 23 [2022-12-14 12:25:07,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:07,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:07,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:07,386 INFO L321 Elim1Store]: treesize reduction 136, result has 18.1 percent of original size [2022-12-14 12:25:07,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 67 [2022-12-14 12:25:07,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:07,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:07,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:07,467 INFO L321 Elim1Store]: treesize reduction 107, result has 35.5 percent of original size [2022-12-14 12:25:07,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 96 [2022-12-14 12:25:09,181 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 [2022-12-14 12:25:09,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 12:25:09,307 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 17 for LOIs [2022-12-14 12:25:09,313 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:25:15,487 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20598#(and (<= |~#list~0.base| 3) (<= 0 |#NULL.base|) (= (select (select |#memory_$Pointer$.offset| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|)) |ULTIMATE.start_main_~cursor~1#1.offset|) (= (select |#valid| |~#list~0.base|) 1) (or (not (= |ULTIMATE.start_main_~cursor~1#1.offset| 0)) (not (= |ULTIMATE.start_main_~cursor~1#1.base| 0))) (<= (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset| 4) (select |#length| |~#list~0.base|)) (<= |#NULL.offset| 0) (= |ULTIMATE.start_main_~cursor~1#1.base| (select (select |#memory_$Pointer$.base| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|))) (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|))) (<= |#NULL.base| 0) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (not (= (select |#valid| |ULTIMATE.start_main_~cursor~1#1.base|) 1)) (<= |~#list~0.offset| 0))' at error location [2022-12-14 12:25:15,487 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:25:15,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:25:15,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 21 [2022-12-14 12:25:15,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389741864] [2022-12-14 12:25:15,487 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:25:15,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 12:25:15,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:25:15,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 12:25:15,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2460, Unknown=3, NotChecked=0, Total=2652 [2022-12-14 12:25:15,488 INFO L87 Difference]: Start difference. First operand 270 states and 341 transitions. Second operand has 22 states, 21 states have (on average 3.238095238095238) internal successors, (68), 22 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) [2022-12-14 12:25:17,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:25:17,779 INFO L93 Difference]: Finished difference Result 424 states and 512 transitions. [2022-12-14 12:25:17,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 12:25:17,779 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.238095238095238) internal successors, (68), 22 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 [2022-12-14 12:25:17,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:25:17,780 INFO L225 Difference]: With dead ends: 424 [2022-12-14 12:25:17,780 INFO L226 Difference]: Without dead ends: 424 [2022-12-14 12:25:17,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1182 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=387, Invalid=3900, Unknown=3, NotChecked=0, Total=4290 [2022-12-14 12:25:17,781 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 485 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 12:25:17,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 897 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 12:25:17,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-12-14 12:25:17,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 296. [2022-12-14 12:25:17,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 237 states have (on average 1.5063291139240507) internal successors, (357), 281 states have internal predecessors, (357), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 12:25:17,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 377 transitions. [2022-12-14 12:25:17,785 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 377 transitions. Word has length 36 [2022-12-14 12:25:17,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:25:17,785 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 377 transitions. [2022-12-14 12:25:17,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.238095238095238) internal successors, (68), 22 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) [2022-12-14 12:25:17,785 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 377 transitions. [2022-12-14 12:25:17,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 12:25:17,786 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:25:17,786 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] [2022-12-14 12:25:17,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 12:25:17,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-14 12:25:17,987 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:25:17,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:25:17,987 INFO L85 PathProgramCache]: Analyzing trace with hash -2122044157, now seen corresponding path program 1 times [2022-12-14 12:25:17,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:25:17,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144793104] [2022-12-14 12:25:17,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:25:17,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:25:18,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:25:19,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:25:19,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:25:19,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144793104] [2022-12-14 12:25:19,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144793104] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:25:19,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093460330] [2022-12-14 12:25:19,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:25:19,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:25:19,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:25:19,456 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:25:19,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 12:25:19,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:25:19,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 75 conjunts are in the unsatisfiable core [2022-12-14 12:25:19,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:25:19,650 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 [2022-12-14 12:25:19,668 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 12:25:19,668 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 [2022-12-14 12:25:19,852 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 16 treesize of output 18 [2022-12-14 12:25:19,858 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 16 treesize of output 18 [2022-12-14 12:25:19,901 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 16 treesize of output 18 [2022-12-14 12:25:19,912 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 16 treesize of output 18 [2022-12-14 12:25:19,935 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 16 treesize of output 18 [2022-12-14 12:25:19,944 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 16 treesize of output 18 [2022-12-14 12:25:20,054 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-12-14 12:25:20,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2022-12-14 12:25:20,066 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-12-14 12:25:20,066 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 21 treesize of output 20 [2022-12-14 12:25:20,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:20,262 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2022-12-14 12:25:20,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 54 [2022-12-14 12:25:20,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:20,280 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2022-12-14 12:25:20,281 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 2 case distinctions, treesize of input 71 treesize of output 81 [2022-12-14 12:25:20,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:20,607 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:25:20,607 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 42 [2022-12-14 12:25:20,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:20,618 INFO L321 Elim1Store]: treesize reduction 20, result has 13.0 percent of original size [2022-12-14 12:25:20,619 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 26 treesize of output 13 [2022-12-14 12:25:20,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:25:20,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:25:28,743 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:25:28,743 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 369 treesize of output 374 [2022-12-14 12:25:30,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093460330] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:25:30,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [122023594] [2022-12-14 12:25:30,488 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-12-14 12:25:30,489 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:25:30,489 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:25:30,489 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:25:30,489 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:25:30,641 INFO L321 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2022-12-14 12:25:30,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 214 treesize of output 216 [2022-12-14 12:25:30,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:30,834 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-12-14 12:25:30,834 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 1 case distinctions, treesize of input 247 treesize of output 222 [2022-12-14 12:25:30,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:30,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:30,881 INFO L321 Elim1Store]: treesize reduction 127, result has 11.8 percent of original size [2022-12-14 12:25:30,881 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 5 case distinctions, treesize of input 253 treesize of output 237 [2022-12-14 12:25:30,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:30,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:30,925 INFO L321 Elim1Store]: treesize reduction 127, result has 11.8 percent of original size [2022-12-14 12:25:30,925 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 5 case distinctions, treesize of input 253 treesize of output 237 [2022-12-14 12:25:31,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:31,040 INFO L321 Elim1Store]: treesize reduction 132, result has 17.5 percent of original size [2022-12-14 12:25:31,041 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 5 case distinctions, treesize of input 250 treesize of output 245 [2022-12-14 12:25:31,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:31,086 INFO L321 Elim1Store]: treesize reduction 132, result has 17.5 percent of original size [2022-12-14 12:25:31,086 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 5 case distinctions, treesize of input 250 treesize of output 245 [2022-12-14 12:25:31,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:31,110 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-12-14 12:25:31,111 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 1 case distinctions, treesize of input 247 treesize of output 222 [2022-12-14 12:25:31,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:31,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:31,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:31,228 INFO L321 Elim1Store]: treesize reduction 140, result has 14.1 percent of original size [2022-12-14 12:25:31,228 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 7 case distinctions, treesize of input 265 treesize of output 248 [2022-12-14 12:25:31,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:31,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:31,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:31,275 INFO L321 Elim1Store]: treesize reduction 140, result has 14.1 percent of original size [2022-12-14 12:25:31,275 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 7 case distinctions, treesize of input 265 treesize of output 248 [2022-12-14 12:25:31,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:31,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:31,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 231 [2022-12-14 12:25:31,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:31,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:31,438 INFO L321 Elim1Store]: treesize reduction 180, result has 21.4 percent of original size [2022-12-14 12:25:31,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 257 treesize of output 265 [2022-12-14 12:25:31,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:31,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:31,508 INFO L321 Elim1Store]: treesize reduction 190, result has 17.0 percent of original size [2022-12-14 12:25:31,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 237 treesize of output 235 [2022-12-14 12:25:31,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:31,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:31,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:31,540 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-12-14 12:25:31,541 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 3 case distinctions, treesize of input 228 treesize of output 214 [2022-12-14 12:25:31,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:31,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:31,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:31,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:31,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:31,873 INFO L321 Elim1Store]: treesize reduction 297, result has 11.3 percent of original size [2022-12-14 12:25:31,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 504 treesize of output 482 [2022-12-14 12:25:31,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:31,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:31,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:31,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:31,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:31,982 INFO L321 Elim1Store]: treesize reduction 312, result has 6.9 percent of original size [2022-12-14 12:25:31,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 496 treesize of output 451 [2022-12-14 12:25:32,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:32,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:32,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:32,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:32,019 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:25:32,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 457 treesize of output 419 [2022-12-14 12:25:33,489 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 [2022-12-14 12:25:33,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 12:25:33,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:33,614 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 30 treesize of output 25 [2022-12-14 12:25:33,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:33,628 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 30 treesize of output 25 [2022-12-14 12:25:33,652 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 [2022-12-14 12:25:33,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-12-14 12:25:33,710 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 15 treesize of output 11 [2022-12-14 12:25:33,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:25:33,757 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 12:25:33,758 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 31 treesize of output 21 [2022-12-14 12:25:33,768 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 13 treesize of output 9 [2022-12-14 12:25:33,793 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 12:25:33,793 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 31 treesize of output 21 [2022-12-14 12:25:33,861 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 12:25:33,862 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 29 treesize of output 40 [2022-12-14 12:25:33,901 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 12:25:33,902 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 29 treesize of output 40 [2022-12-14 12:25:33,942 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-12-14 12:25:33,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 12:25:34,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:34,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:34,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:34,072 INFO L321 Elim1Store]: treesize reduction 136, result has 18.1 percent of original size [2022-12-14 12:25:34,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 67 [2022-12-14 12:25:34,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:34,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:34,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:34,151 INFO L321 Elim1Store]: treesize reduction 107, result has 35.5 percent of original size [2022-12-14 12:25:34,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 96 [2022-12-14 12:25:34,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:34,181 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 23 [2022-12-14 12:25:36,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 12:25:36,482 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 [2022-12-14 12:25:36,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:36,562 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 30 treesize of output 25 [2022-12-14 12:25:36,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:36,578 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 30 treesize of output 25 [2022-12-14 12:25:36,592 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 [2022-12-14 12:25:36,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:25:36,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:25:36,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 12:25:36,672 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 12:25:36,672 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 31 treesize of output 21 [2022-12-14 12:25:36,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:25:36,700 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 12:25:36,700 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 31 treesize of output 21 [2022-12-14 12:25:36,752 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 12:25:36,752 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 29 treesize of output 40 [2022-12-14 12:25:36,784 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 12:25:36,784 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 29 treesize of output 40 [2022-12-14 12:25:36,812 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-12-14 12:25:36,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 12:25:36,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:36,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:36,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:36,940 INFO L321 Elim1Store]: treesize reduction 107, result has 35.5 percent of original size [2022-12-14 12:25:36,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 96 [2022-12-14 12:25:36,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:36,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:36,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:36,993 INFO L321 Elim1Store]: treesize reduction 136, result has 18.1 percent of original size [2022-12-14 12:25:36,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 67 [2022-12-14 12:25:37,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:37,011 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 23 [2022-12-14 12:25:38,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 12:25:38,731 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 [2022-12-14 12:25:38,869 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 17 for LOIs [2022-12-14 12:25:38,877 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:25:47,941 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21593#(and (<= |~#list~0.base| 3) (<= 0 |#NULL.base|) (= (select (select |#memory_$Pointer$.offset| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|)) |ULTIMATE.start_main_~cursor~1#1.offset|) (= (select |#valid| |~#list~0.base|) 1) (or (not (= |ULTIMATE.start_main_~cursor~1#1.offset| 0)) (not (= |ULTIMATE.start_main_~cursor~1#1.base| 0))) (or (not (<= (+ (* 4 |ULTIMATE.start_main_~direction~0#1|) 4 |ULTIMATE.start_main_~cursor~1#1.offset|) (select |#length| |ULTIMATE.start_main_~cursor~1#1.base|))) (not (<= 0 (+ (* 4 |ULTIMATE.start_main_~direction~0#1|) |ULTIMATE.start_main_~cursor~1#1.offset|)))) (<= (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset| 4) (select |#length| |~#list~0.base|)) (<= |#NULL.offset| 0) (= |ULTIMATE.start_main_~cursor~1#1.base| (select (select |#memory_$Pointer$.base| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|))) (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|))) (<= |#NULL.base| 0) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |~#list~0.offset| 0))' at error location [2022-12-14 12:25:47,941 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:25:47,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:25:47,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 22 [2022-12-14 12:25:47,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139064629] [2022-12-14 12:25:47,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:25:47,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 12:25:47,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:25:47,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 12:25:47,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2870, Unknown=2, NotChecked=0, Total=3080 [2022-12-14 12:25:47,943 INFO L87 Difference]: Start difference. First operand 296 states and 377 transitions. Second operand has 23 states, 22 states have (on average 3.090909090909091) internal successors, (68), 23 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) [2022-12-14 12:25:53,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:25:53,697 INFO L93 Difference]: Finished difference Result 567 states and 711 transitions. [2022-12-14 12:25:53,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 12:25:53,697 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.090909090909091) internal successors, (68), 23 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 [2022-12-14 12:25:53,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:25:53,698 INFO L225 Difference]: With dead ends: 567 [2022-12-14 12:25:53,698 INFO L226 Difference]: Without dead ends: 567 [2022-12-14 12:25:53,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1434 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=467, Invalid=4933, Unknown=2, NotChecked=0, Total=5402 [2022-12-14 12:25:53,700 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 1133 mSDsluCounter, 1279 mSDsCounter, 0 mSdLazyCounter, 1440 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1133 SdHoareTripleChecker+Valid, 1366 SdHoareTripleChecker+Invalid, 1501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:25:53,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1133 Valid, 1366 Invalid, 1501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1440 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 12:25:53,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-12-14 12:25:53,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 315. [2022-12-14 12:25:53,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 256 states have (on average 1.5625) internal successors, (400), 300 states have internal predecessors, (400), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 12:25:53,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 420 transitions. [2022-12-14 12:25:53,704 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 420 transitions. Word has length 36 [2022-12-14 12:25:53,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:25:53,704 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 420 transitions. [2022-12-14 12:25:53,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.090909090909091) internal successors, (68), 23 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) [2022-12-14 12:25:53,704 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 420 transitions. [2022-12-14 12:25:53,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 12:25:53,704 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:25:53,704 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] [2022-12-14 12:25:53,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 12:25:53,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:25:53,906 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:25:53,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:25:53,907 INFO L85 PathProgramCache]: Analyzing trace with hash -2122042501, now seen corresponding path program 1 times [2022-12-14 12:25:53,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:25:53,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524331819] [2022-12-14 12:25:53,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:25:53,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:25:53,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:25:54,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:25:54,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:25:54,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524331819] [2022-12-14 12:25:54,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524331819] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:25:54,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559975928] [2022-12-14 12:25:54,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:25:54,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:25:54,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:25:54,999 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:25:55,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 12:25:55,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:25:55,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-14 12:25:55,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:25:55,272 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 [2022-12-14 12:25:55,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:55,492 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:25:55,492 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 41 treesize of output 47 [2022-12-14 12:25:55,499 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:25:55,499 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 25 treesize of output 25 [2022-12-14 12:25:55,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:25:55,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:25:55,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559975928] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:25:55,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:25:55,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 22 [2022-12-14 12:25:55,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819231172] [2022-12-14 12:25:55,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:25:55,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 12:25:55,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:25:55,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 12:25:55,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2022-12-14 12:25:55,541 INFO L87 Difference]: Start difference. First operand 315 states and 420 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 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) [2022-12-14 12:25:56,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:25:56,071 INFO L93 Difference]: Finished difference Result 470 states and 616 transitions. [2022-12-14 12:25:56,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 12:25:56,071 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 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 36 [2022-12-14 12:25:56,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:25:56,072 INFO L225 Difference]: With dead ends: 470 [2022-12-14 12:25:56,072 INFO L226 Difference]: Without dead ends: 470 [2022-12-14 12:25:56,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-12-14 12:25:56,073 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 890 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:25:56,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [890 Valid, 603 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:25:56,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-12-14 12:25:56,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 382. [2022-12-14 12:25:56,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 317 states have (on average 1.5678233438485805) internal successors, (497), 363 states have internal predecessors, (497), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-12-14 12:25:56,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 525 transitions. [2022-12-14 12:25:56,077 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 525 transitions. Word has length 36 [2022-12-14 12:25:56,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:25:56,078 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 525 transitions. [2022-12-14 12:25:56,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 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) [2022-12-14 12:25:56,078 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 525 transitions. [2022-12-14 12:25:56,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 12:25:56,078 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:25:56,078 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] [2022-12-14 12:25:56,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 12:25:56,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:25:56,279 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:25:56,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:25:56,279 INFO L85 PathProgramCache]: Analyzing trace with hash 749210043, now seen corresponding path program 1 times [2022-12-14 12:25:56,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:25:56,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735673735] [2022-12-14 12:25:56,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:25:56,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:25:56,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:25:56,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 12:25:56,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:25:56,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735673735] [2022-12-14 12:25:56,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735673735] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:25:56,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:25:56,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:25:56,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911265673] [2022-12-14 12:25:56,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:25:56,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:25:56,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:25:56,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:25:56,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:25:56,359 INFO L87 Difference]: Start difference. First operand 382 states and 525 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 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) [2022-12-14 12:25:56,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:25:56,442 INFO L93 Difference]: Finished difference Result 537 states and 714 transitions. [2022-12-14 12:25:56,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:25:56,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 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 38 [2022-12-14 12:25:56,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:25:56,444 INFO L225 Difference]: With dead ends: 537 [2022-12-14 12:25:56,444 INFO L226 Difference]: Without dead ends: 537 [2022-12-14 12:25:56,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:25:56,444 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 216 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:25:56,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 268 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:25:56,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-12-14 12:25:56,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 381. [2022-12-14 12:25:56,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 317 states have (on average 1.5488958990536277) internal successors, (491), 362 states have internal predecessors, (491), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-12-14 12:25:56,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 519 transitions. [2022-12-14 12:25:56,451 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 519 transitions. Word has length 38 [2022-12-14 12:25:56,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:25:56,451 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 519 transitions. [2022-12-14 12:25:56,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 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) [2022-12-14 12:25:56,452 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 519 transitions. [2022-12-14 12:25:56,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 12:25:56,452 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:25:56,452 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] [2022-12-14 12:25:56,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-12-14 12:25:56,452 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:25:56,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:25:56,453 INFO L85 PathProgramCache]: Analyzing trace with hash 825071461, now seen corresponding path program 1 times [2022-12-14 12:25:56,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:25:56,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485076057] [2022-12-14 12:25:56,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:25:56,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:25:56,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:25:57,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:25:57,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:25:57,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485076057] [2022-12-14 12:25:57,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485076057] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:25:57,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652904931] [2022-12-14 12:25:57,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:25:57,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:25:57,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:25:57,603 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:25:57,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 12:25:57,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:25:57,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 64 conjunts are in the unsatisfiable core [2022-12-14 12:25:57,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:25:57,926 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 12:25:57,926 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 [2022-12-14 12:25:58,202 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 16 treesize of output 18 [2022-12-14 12:25:58,262 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 16 treesize of output 18 [2022-12-14 12:25:58,297 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 16 treesize of output 18 [2022-12-14 12:25:58,425 INFO L321 Elim1Store]: treesize reduction 22, result has 47.6 percent of original size [2022-12-14 12:25:58,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 12:25:58,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:58,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:58,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:25:58,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 32 [2022-12-14 12:25:58,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:58,840 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:25:58,840 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 50 treesize of output 40 [2022-12-14 12:25:58,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:25:58,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:25:59,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652904931] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:25:59,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [108788352] [2022-12-14 12:25:59,656 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-12-14 12:25:59,656 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:25:59,657 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:25:59,657 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:25:59,657 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:25:59,797 INFO L321 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2022-12-14 12:25:59,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 214 treesize of output 216 [2022-12-14 12:25:59,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:59,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:00,007 INFO L321 Elim1Store]: treesize reduction 127, result has 11.8 percent of original size [2022-12-14 12:26:00,007 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 5 case distinctions, treesize of input 253 treesize of output 237 [2022-12-14 12:26:00,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:00,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:00,049 INFO L321 Elim1Store]: treesize reduction 127, result has 11.8 percent of original size [2022-12-14 12:26:00,049 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 5 case distinctions, treesize of input 253 treesize of output 237 [2022-12-14 12:26:00,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:00,076 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-12-14 12:26:00,076 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 1 case distinctions, treesize of input 247 treesize of output 222 [2022-12-14 12:26:00,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:00,202 INFO L321 Elim1Store]: treesize reduction 132, result has 17.5 percent of original size [2022-12-14 12:26:00,203 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 5 case distinctions, treesize of input 250 treesize of output 245 [2022-12-14 12:26:00,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:00,233 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-12-14 12:26:00,233 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 1 case distinctions, treesize of input 247 treesize of output 222 [2022-12-14 12:26:00,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:00,273 INFO L321 Elim1Store]: treesize reduction 132, result has 17.5 percent of original size [2022-12-14 12:26:00,273 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 5 case distinctions, treesize of input 250 treesize of output 245 [2022-12-14 12:26:00,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:00,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:00,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:00,390 INFO L321 Elim1Store]: treesize reduction 140, result has 14.1 percent of original size [2022-12-14 12:26:00,390 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 7 case distinctions, treesize of input 265 treesize of output 248 [2022-12-14 12:26:00,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:00,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:00,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 231 [2022-12-14 12:26:00,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:00,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:00,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:00,451 INFO L321 Elim1Store]: treesize reduction 140, result has 14.1 percent of original size [2022-12-14 12:26:00,451 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 7 case distinctions, treesize of input 265 treesize of output 248 [2022-12-14 12:26:00,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:00,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:00,621 INFO L321 Elim1Store]: treesize reduction 180, result has 21.4 percent of original size [2022-12-14 12:26:00,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 257 treesize of output 265 [2022-12-14 12:26:00,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:00,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:00,700 INFO L321 Elim1Store]: treesize reduction 190, result has 17.0 percent of original size [2022-12-14 12:26:00,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 237 treesize of output 235 [2022-12-14 12:26:00,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:00,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:00,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:00,737 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-12-14 12:26:00,737 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 3 case distinctions, treesize of input 228 treesize of output 214 [2022-12-14 12:26:00,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:00,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:00,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:00,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:00,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:01,054 INFO L321 Elim1Store]: treesize reduction 297, result has 11.3 percent of original size [2022-12-14 12:26:01,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 498 treesize of output 480 [2022-12-14 12:26:01,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:01,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:01,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:01,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:01,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:01,141 INFO L321 Elim1Store]: treesize reduction 312, result has 6.9 percent of original size [2022-12-14 12:26:01,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 482 treesize of output 437 [2022-12-14 12:26:01,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:01,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:01,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:01,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:01,169 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:26:01,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 443 treesize of output 405 [2022-12-14 12:26:02,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 12:26:02,928 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 [2022-12-14 12:26:03,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:03,017 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 30 treesize of output 25 [2022-12-14 12:26:03,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-12-14 12:26:03,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:03,048 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 30 treesize of output 25 [2022-12-14 12:26:03,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 12:26:03,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:26:03,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:26:03,136 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 12:26:03,136 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 31 treesize of output 21 [2022-12-14 12:26:03,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:26:03,163 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 12:26:03,163 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 31 treesize of output 21 [2022-12-14 12:26:03,218 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 12:26:03,218 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 29 treesize of output 40 [2022-12-14 12:26:03,251 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 12:26:03,252 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 29 treesize of output 40 [2022-12-14 12:26:03,282 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-12-14 12:26:03,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 12:26:03,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:03,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:03,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:03,390 INFO L321 Elim1Store]: treesize reduction 136, result has 18.1 percent of original size [2022-12-14 12:26:03,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 67 [2022-12-14 12:26:03,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:03,408 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 23 [2022-12-14 12:26:03,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:03,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:03,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:03,463 INFO L321 Elim1Store]: treesize reduction 107, result has 35.5 percent of original size [2022-12-14 12:26:03,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 96 [2022-12-14 12:26:05,692 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 [2022-12-14 12:26:05,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 12:26:05,774 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 [2022-12-14 12:26:05,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:05,787 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 30 treesize of output 25 [2022-12-14 12:26:05,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:05,801 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 30 treesize of output 25 [2022-12-14 12:26:05,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:26:05,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:26:05,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:26:05,905 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 12:26:05,905 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 31 treesize of output 21 [2022-12-14 12:26:05,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:26:05,942 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 12:26:05,943 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 31 treesize of output 21 [2022-12-14 12:26:06,007 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 12:26:06,007 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 29 treesize of output 40 [2022-12-14 12:26:06,044 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-12-14 12:26:06,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 12:26:06,083 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 12:26:06,083 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 29 treesize of output 40 [2022-12-14 12:26:06,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:06,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:06,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:06,208 INFO L321 Elim1Store]: treesize reduction 136, result has 18.1 percent of original size [2022-12-14 12:26:06,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 67 [2022-12-14 12:26:06,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:06,232 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 23 [2022-12-14 12:26:06,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:06,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:06,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:06,302 INFO L321 Elim1Store]: treesize reduction 107, result has 35.5 percent of original size [2022-12-14 12:26:06,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 96 [2022-12-14 12:26:07,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 12:26:07,994 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 [2022-12-14 12:26:08,104 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 17 for LOIs [2022-12-14 12:26:08,109 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:26:15,414 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24695#(and (<= |~#list~0.base| 3) (<= 0 |#NULL.base|) (= (select (select |#memory_$Pointer$.offset| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|)) |ULTIMATE.start_main_~cursor~1#1.offset|) (= (select |#valid| |~#list~0.base|) 1) (not (= |ULTIMATE.start_main_~cursor~1#1.base| 0)) (<= (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset| 4) (select |#length| |~#list~0.base|)) (<= |#NULL.offset| 0) (= |ULTIMATE.start_main_~cursor~1#1.offset| 0) (= |ULTIMATE.start_main_~cursor~1#1.base| (select (select |#memory_$Pointer$.base| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|))) (= |ULTIMATE.start_main_~next~1#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~cursor~1#1.base|) (+ (* 4 |ULTIMATE.start_main_~direction~0#1|) |ULTIMATE.start_main_~cursor~1#1.offset|))) (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|))) (<= (+ (* 4 |ULTIMATE.start_main_~direction~0#1|) 4 |ULTIMATE.start_main_~cursor~1#1.offset|) (select |#length| |ULTIMATE.start_main_~cursor~1#1.base|)) (<= |#NULL.base| 0) (= |ULTIMATE.start_main_~next~1#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~cursor~1#1.base|) (+ (* 4 |ULTIMATE.start_main_~direction~0#1|) |ULTIMATE.start_main_~cursor~1#1.offset|))) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (= (select |#valid| |ULTIMATE.start_main_~cursor~1#1.base|) 1) (not (< |ULTIMATE.start_main_~cursor~1#1.base| |#StackHeapBarrier|)) (<= 0 |#StackHeapBarrier|) (<= |~#list~0.offset| 0))' at error location [2022-12-14 12:26:15,414 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:26:15,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:26:15,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 21 [2022-12-14 12:26:15,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701178169] [2022-12-14 12:26:15,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:26:15,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 12:26:15,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:26:15,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 12:26:15,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=2976, Unknown=1, NotChecked=0, Total=3192 [2022-12-14 12:26:15,416 INFO L87 Difference]: Start difference. First operand 381 states and 519 transitions. Second operand has 22 states, 20 states have (on average 3.6) internal successors, (72), 21 states have internal predecessors, (72), 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) [2022-12-14 12:26:19,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:26:19,135 INFO L93 Difference]: Finished difference Result 673 states and 848 transitions. [2022-12-14 12:26:19,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 12:26:19,136 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.6) internal successors, (72), 21 states have internal predecessors, (72), 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 38 [2022-12-14 12:26:19,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:26:19,137 INFO L225 Difference]: With dead ends: 673 [2022-12-14 12:26:19,137 INFO L226 Difference]: Without dead ends: 673 [2022-12-14 12:26:19,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=579, Invalid=5582, Unknown=1, NotChecked=0, Total=6162 [2022-12-14 12:26:19,138 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 1430 mSDsluCounter, 1074 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1430 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:26:19,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1430 Valid, 1168 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 12:26:19,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-12-14 12:26:19,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 417. [2022-12-14 12:26:19,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 350 states have (on average 1.5742857142857143) internal successors, (551), 396 states have internal predecessors, (551), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (16), 12 states have call predecessors, (16), 16 states have call successors, (16) [2022-12-14 12:26:19,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 583 transitions. [2022-12-14 12:26:19,143 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 583 transitions. Word has length 38 [2022-12-14 12:26:19,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:26:19,143 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 583 transitions. [2022-12-14 12:26:19,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.6) internal successors, (72), 21 states have internal predecessors, (72), 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) [2022-12-14 12:26:19,144 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 583 transitions. [2022-12-14 12:26:19,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 12:26:19,144 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:26:19,144 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] [2022-12-14 12:26:19,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 12:26:19,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-14 12:26:19,345 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:26:19,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:26:19,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1750675066, now seen corresponding path program 1 times [2022-12-14 12:26:19,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:26:19,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812721831] [2022-12-14 12:26:19,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:26:19,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:26:19,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:26:20,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:26:20,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:26:20,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812721831] [2022-12-14 12:26:20,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812721831] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:26:20,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225036580] [2022-12-14 12:26:20,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:26:20,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:26:20,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:26:20,073 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:26:20,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 12:26:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:26:20,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-14 12:26:20,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:26:20,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 12:26:20,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:26:20,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:20,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:20,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:20,571 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:26:20,571 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 136 [2022-12-14 12:26:20,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:20,585 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:26:20,585 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 96 treesize of output 86 [2022-12-14 12:26:20,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:26:20,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:26:21,312 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:26:21,312 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 284 treesize of output 282 [2022-12-14 12:26:21,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:21,319 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 319 treesize of output 281 [2022-12-14 12:26:21,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:21,334 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:26:21,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 308 treesize of output 294 [2022-12-14 12:26:21,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:21,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-12-14 12:26:21,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 4 [2022-12-14 12:26:21,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-12-14 12:26:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:26:21,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225036580] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:26:21,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1071673981] [2022-12-14 12:26:21,740 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2022-12-14 12:26:21,740 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:26:21,740 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:26:21,740 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:26:21,741 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:26:21,845 INFO L321 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2022-12-14 12:26:21,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 214 treesize of output 216 [2022-12-14 12:26:22,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:22,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:22,066 INFO L321 Elim1Store]: treesize reduction 127, result has 11.8 percent of original size [2022-12-14 12:26:22,066 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 5 case distinctions, treesize of input 253 treesize of output 237 [2022-12-14 12:26:22,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:22,100 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-12-14 12:26:22,100 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 1 case distinctions, treesize of input 247 treesize of output 222 [2022-12-14 12:26:22,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:22,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:22,143 INFO L321 Elim1Store]: treesize reduction 127, result has 11.8 percent of original size [2022-12-14 12:26:22,144 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 5 case distinctions, treesize of input 253 treesize of output 237 [2022-12-14 12:26:22,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:22,270 INFO L321 Elim1Store]: treesize reduction 132, result has 17.5 percent of original size [2022-12-14 12:26:22,271 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 5 case distinctions, treesize of input 250 treesize of output 245 [2022-12-14 12:26:22,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:22,317 INFO L321 Elim1Store]: treesize reduction 132, result has 17.5 percent of original size [2022-12-14 12:26:22,317 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 5 case distinctions, treesize of input 250 treesize of output 245 [2022-12-14 12:26:22,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:22,340 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-12-14 12:26:22,340 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 1 case distinctions, treesize of input 247 treesize of output 222 [2022-12-14 12:26:22,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:22,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:22,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:22,444 INFO L321 Elim1Store]: treesize reduction 140, result has 14.1 percent of original size [2022-12-14 12:26:22,444 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 7 case distinctions, treesize of input 265 treesize of output 248 [2022-12-14 12:26:22,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:22,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:22,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 231 [2022-12-14 12:26:22,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:22,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:22,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:22,509 INFO L321 Elim1Store]: treesize reduction 140, result has 14.1 percent of original size [2022-12-14 12:26:22,509 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 7 case distinctions, treesize of input 265 treesize of output 248 [2022-12-14 12:26:22,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:22,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:22,661 INFO L321 Elim1Store]: treesize reduction 180, result has 21.4 percent of original size [2022-12-14 12:26:22,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 257 treesize of output 265 [2022-12-14 12:26:22,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:22,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:22,737 INFO L321 Elim1Store]: treesize reduction 190, result has 17.0 percent of original size [2022-12-14 12:26:22,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 237 treesize of output 235 [2022-12-14 12:26:22,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:22,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:22,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:22,771 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-12-14 12:26:22,771 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 3 case distinctions, treesize of input 228 treesize of output 214 [2022-12-14 12:26:23,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:23,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:23,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:23,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:23,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:23,103 INFO L321 Elim1Store]: treesize reduction 312, result has 6.9 percent of original size [2022-12-14 12:26:23,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 504 treesize of output 459 [2022-12-14 12:26:23,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:23,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:23,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:23,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:23,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:23,205 INFO L321 Elim1Store]: treesize reduction 294, result has 12.2 percent of original size [2022-12-14 12:26:23,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 488 treesize of output 469 [2022-12-14 12:26:23,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:23,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:23,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:23,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:23,235 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:26:23,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 457 treesize of output 419 [2022-12-14 12:26:23,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 12:26:23,859 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 [2022-12-14 12:26:23,948 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 12:26:23,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-12-14 12:26:23,972 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 12:26:23,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-12-14 12:26:23,984 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 [2022-12-14 12:26:24,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-12-14 12:26:24,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:26:24,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:26:24,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:26:24,083 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 12:26:24,084 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 31 treesize of output 21 [2022-12-14 12:26:24,102 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 12:26:24,102 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 31 treesize of output 21 [2022-12-14 12:26:24,162 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 12:26:24,162 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 29 treesize of output 40 [2022-12-14 12:26:24,195 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 12:26:24,195 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 29 treesize of output 40 [2022-12-14 12:26:24,227 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-12-14 12:26:24,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 12:26:24,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:24,305 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 23 [2022-12-14 12:26:24,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:24,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:24,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:24,380 INFO L321 Elim1Store]: treesize reduction 107, result has 35.5 percent of original size [2022-12-14 12:26:24,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 96 [2022-12-14 12:26:24,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:24,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:24,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:24,451 INFO L321 Elim1Store]: treesize reduction 136, result has 18.1 percent of original size [2022-12-14 12:26:24,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 67 [2022-12-14 12:26:25,970 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 [2022-12-14 12:26:25,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 12:26:26,058 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 12:26:26,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-12-14 12:26:26,068 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 [2022-12-14 12:26:26,092 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 12:26:26,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-12-14 12:26:26,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:26:26,131 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 [2022-12-14 12:26:26,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:26:26,172 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 12:26:26,172 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 31 treesize of output 21 [2022-12-14 12:26:26,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:26:26,198 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 12:26:26,199 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 31 treesize of output 21 [2022-12-14 12:26:26,264 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-12-14 12:26:26,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 12:26:26,298 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 12:26:26,298 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 29 treesize of output 40 [2022-12-14 12:26:26,340 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 12:26:26,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 40 [2022-12-14 12:26:26,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:26,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:26,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:26,488 INFO L321 Elim1Store]: treesize reduction 107, result has 35.5 percent of original size [2022-12-14 12:26:26,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 96 [2022-12-14 12:26:26,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:26,512 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 23 [2022-12-14 12:26:26,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:26,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:26,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:26,567 INFO L321 Elim1Store]: treesize reduction 136, result has 18.1 percent of original size [2022-12-14 12:26:26,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 67 [2022-12-14 12:26:27,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 12:26:27,124 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 [2022-12-14 12:26:27,240 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 17 for LOIs [2022-12-14 12:26:27,246 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:26:35,243 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26119#(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|) (= |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)) (= |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|) (<= (+ (* ~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) (or (= ~unnamed1~0~LIST_END |ULTIMATE.start_main_#t~ret32#1|) (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_#t~ret32#1|)) (<= 0 |~#list~0.offset|) (= |ULTIMATE.start_is_empty_#in~list#1.base| |ULTIMATE.start_remove_one_~list#1.base|) (<= 3 |~#list~0.base|) (= (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|)) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_main_#t~ret32#1|) (<= |~#list~0.offset| 0))' at error location [2022-12-14 12:26:35,244 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:26:35,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:26:35,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 34 [2022-12-14 12:26:35,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775469354] [2022-12-14 12:26:35,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:26:35,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 12:26:35,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:26:35,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 12:26:35,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=3465, Unknown=0, NotChecked=0, Total=3782 [2022-12-14 12:26:35,245 INFO L87 Difference]: Start difference. First operand 417 states and 583 transitions. Second operand has 34 states, 34 states have (on average 2.911764705882353) internal successors, (99), 34 states have internal predecessors, (99), 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) [2022-12-14 12:26:45,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:26:45,609 INFO L93 Difference]: Finished difference Result 2360 states and 2932 transitions. [2022-12-14 12:26:45,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-12-14 12:26:45,609 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.911764705882353) internal successors, (99), 34 states have internal predecessors, (99), 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 39 [2022-12-14 12:26:45,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:26:45,613 INFO L225 Difference]: With dead ends: 2360 [2022-12-14 12:26:45,613 INFO L226 Difference]: Without dead ends: 2353 [2022-12-14 12:26:45,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8332 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=3373, Invalid=20807, Unknown=0, NotChecked=0, Total=24180 [2022-12-14 12:26:45,616 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 6398 mSDsluCounter, 2466 mSDsCounter, 0 mSdLazyCounter, 4219 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6398 SdHoareTripleChecker+Valid, 2594 SdHoareTripleChecker+Invalid, 4763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 4219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:26:45,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6398 Valid, 2594 Invalid, 4763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 4219 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-12-14 12:26:45,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2022-12-14 12:26:45,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 579. [2022-12-14 12:26:45,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 500 states have (on average 1.546) internal successors, (773), 548 states have internal predecessors, (773), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (25), 19 states have call predecessors, (25), 25 states have call successors, (25) [2022-12-14 12:26:45,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 823 transitions. [2022-12-14 12:26:45,628 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 823 transitions. Word has length 39 [2022-12-14 12:26:45,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:26:45,628 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 823 transitions. [2022-12-14 12:26:45,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.911764705882353) internal successors, (99), 34 states have internal predecessors, (99), 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) [2022-12-14 12:26:45,628 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 823 transitions. [2022-12-14 12:26:45,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 12:26:45,629 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:26:45,629 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] [2022-12-14 12:26:45,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 12:26:45,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-14 12:26:45,829 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:26:45,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:26:45,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1563295443, now seen corresponding path program 1 times [2022-12-14 12:26:45,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:26:45,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699939957] [2022-12-14 12:26:45,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:26:45,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:26:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:26:45,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:26:45,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:26:45,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699939957] [2022-12-14 12:26:45,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699939957] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:26:45,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:26:45,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 12:26:45,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287054750] [2022-12-14 12:26:45,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:26:45,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:26:45,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:26:45,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:26:45,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:26:45,973 INFO L87 Difference]: Start difference. First operand 579 states and 823 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 7 states have internal predecessors, (35), 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) [2022-12-14 12:26:46,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:26:46,136 INFO L93 Difference]: Finished difference Result 696 states and 964 transitions. [2022-12-14 12:26:46,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:26:46,136 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 7 states have internal predecessors, (35), 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 40 [2022-12-14 12:26:46,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:26:46,138 INFO L225 Difference]: With dead ends: 696 [2022-12-14 12:26:46,138 INFO L226 Difference]: Without dead ends: 696 [2022-12-14 12:26:46,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-12-14 12:26:46,138 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 336 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:26:46,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 195 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:26:46,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-12-14 12:26:46,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 576. [2022-12-14 12:26:46,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 500 states have (on average 1.492) internal successors, (746), 545 states have internal predecessors, (746), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (25), 19 states have call predecessors, (25), 25 states have call successors, (25) [2022-12-14 12:26:46,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 796 transitions. [2022-12-14 12:26:46,145 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 796 transitions. Word has length 40 [2022-12-14 12:26:46,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:26:46,145 INFO L495 AbstractCegarLoop]: Abstraction has 576 states and 796 transitions. [2022-12-14 12:26:46,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 7 states have internal predecessors, (35), 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) [2022-12-14 12:26:46,145 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 796 transitions. [2022-12-14 12:26:46,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 12:26:46,145 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:26:46,145 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-12-14 12:26:46,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-12-14 12:26:46,145 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:26:46,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:26:46,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1880932056, now seen corresponding path program 1 times [2022-12-14 12:26:46,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:26:46,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965446950] [2022-12-14 12:26:46,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:26:46,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:26:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:26:46,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:26:46,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:26:46,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965446950] [2022-12-14 12:26:46,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965446950] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:26:46,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:26:46,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:26:46,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605148099] [2022-12-14 12:26:46,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:26:46,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:26:46,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:26:46,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:26:46,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:26:46,198 INFO L87 Difference]: Start difference. First operand 576 states and 796 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 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) [2022-12-14 12:26:46,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:26:46,390 INFO L93 Difference]: Finished difference Result 700 states and 957 transitions. [2022-12-14 12:26:46,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:26:46,390 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 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 [2022-12-14 12:26:46,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:26:46,392 INFO L225 Difference]: With dead ends: 700 [2022-12-14 12:26:46,392 INFO L226 Difference]: Without dead ends: 700 [2022-12-14 12:26:46,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:26:46,392 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 112 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:26:46,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 306 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:26:46,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-12-14 12:26:46,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 577. [2022-12-14 12:26:46,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 501 states have (on average 1.4890219560878244) internal successors, (746), 546 states have internal predecessors, (746), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (25), 19 states have call predecessors, (25), 25 states have call successors, (25) [2022-12-14 12:26:46,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 796 transitions. [2022-12-14 12:26:46,398 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 796 transitions. Word has length 40 [2022-12-14 12:26:46,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:26:46,398 INFO L495 AbstractCegarLoop]: Abstraction has 577 states and 796 transitions. [2022-12-14 12:26:46,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 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) [2022-12-14 12:26:46,398 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 796 transitions. [2022-12-14 12:26:46,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 12:26:46,399 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:26:46,399 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-12-14 12:26:46,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-12-14 12:26:46,399 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:26:46,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:26:46,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1880932057, now seen corresponding path program 1 times [2022-12-14 12:26:46,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:26:46,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376282906] [2022-12-14 12:26:46,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:26:46,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:26:46,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:26:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:26:46,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:26:46,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376282906] [2022-12-14 12:26:46,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376282906] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:26:46,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:26:46,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:26:46,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504424060] [2022-12-14 12:26:46,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:26:46,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:26:46,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:26:46,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:26:46,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:26:46,488 INFO L87 Difference]: Start difference. First operand 577 states and 796 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 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) [2022-12-14 12:26:46,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:26:46,641 INFO L93 Difference]: Finished difference Result 573 states and 774 transitions. [2022-12-14 12:26:46,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:26:46,641 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 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 [2022-12-14 12:26:46,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:26:46,643 INFO L225 Difference]: With dead ends: 573 [2022-12-14 12:26:46,643 INFO L226 Difference]: Without dead ends: 573 [2022-12-14 12:26:46,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:26:46,643 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 115 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:26:46,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 278 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:26:46,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-12-14 12:26:46,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 572. [2022-12-14 12:26:46,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 500 states have (on average 1.446) internal successors, (723), 541 states have internal predecessors, (723), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (25), 19 states have call predecessors, (25), 25 states have call successors, (25) [2022-12-14 12:26:46,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 773 transitions. [2022-12-14 12:26:46,648 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 773 transitions. Word has length 40 [2022-12-14 12:26:46,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:26:46,648 INFO L495 AbstractCegarLoop]: Abstraction has 572 states and 773 transitions. [2022-12-14 12:26:46,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 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) [2022-12-14 12:26:46,649 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 773 transitions. [2022-12-14 12:26:46,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 12:26:46,649 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:26:46,649 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, 1, 1] [2022-12-14 12:26:46,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-12-14 12:26:46,649 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 12:26:46,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:26:46,649 INFO L85 PathProgramCache]: Analyzing trace with hash -393626886, now seen corresponding path program 1 times [2022-12-14 12:26:46,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:26:46,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781475773] [2022-12-14 12:26:46,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:26:46,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:26:46,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:26:49,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:26:49,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:26:49,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781475773] [2022-12-14 12:26:49,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781475773] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:26:49,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675582584] [2022-12-14 12:26:49,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:26:49,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:26:49,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:26:49,897 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:26:49,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c59539f-bc3e-4e2b-a99d-a9dde538d028/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 12:26:49,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:26:49,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 120 conjunts are in the unsatisfiable core [2022-12-14 12:26:49,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:26:50,247 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 12:26:50,247 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 [2022-12-14 12:26:50,634 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 16 treesize of output 18 [2022-12-14 12:26:50,666 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 16 treesize of output 18 [2022-12-14 12:26:50,870 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 25 treesize of output 24 [2022-12-14 12:26:50,879 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 25 treesize of output 24 [2022-12-14 12:26:51,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:51,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:51,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:51,041 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 87 treesize of output 92 [2022-12-14 12:26:51,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:51,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:51,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:51,060 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 87 treesize of output 92 [2022-12-14 12:26:51,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:51,299 INFO L321 Elim1Store]: treesize reduction 22, result has 47.6 percent of original size [2022-12-14 12:26:51,300 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 1 case distinctions, treesize of input 85 treesize of output 101 [2022-12-14 12:26:51,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:51,314 INFO L321 Elim1Store]: treesize reduction 22, result has 47.6 percent of original size [2022-12-14 12:26:51,315 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 1 case distinctions, treesize of input 85 treesize of output 101 [2022-12-14 12:26:51,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:51,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:51,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:51,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:51,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:51,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:51,754 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-12-14 12:26:51,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 86 treesize of output 75 [2022-12-14 12:26:51,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:51,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:51,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:51,760 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 116 treesize of output 121 [2022-12-14 12:26:53,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:53,732 INFO L321 Elim1Store]: treesize reduction 80, result has 91.2 percent of original size [2022-12-14 12:26:53,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 483 treesize of output 1179 [2022-12-14 12:26:53,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:53,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:26:53,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:53,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:56,381 INFO L321 Elim1Store]: treesize reduction 1607, result has 38.7 percent of original size [2022-12-14 12:26:56,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 21 select indices, 21 select index equivalence classes, 3 disjoint index pairs (out of 210 index pairs), introduced 24 new quantified variables, introduced 206 case distinctions, treesize of input 1179 treesize of output 1612 [2022-12-14 12:37:02,922 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-14 12:37:05,697 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-14 12:37:08,450 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-14 12:37:15,147 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-14 12:37:18,080 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts.