./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext/tree_stack.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a 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_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext/tree_stack.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur --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 882715956aab9fc92fb711e54ed51d64e792658e5015ed6151f84b857454f04c --- 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-38b53e6 [2022-11-26 01:09:25,369 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 01:09:25,371 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 01:09:25,402 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 01:09:25,403 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 01:09:25,407 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 01:09:25,410 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 01:09:25,413 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 01:09:25,415 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 01:09:25,421 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 01:09:25,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 01:09:25,424 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 01:09:25,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 01:09:25,427 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 01:09:25,432 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 01:09:25,433 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 01:09:25,434 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 01:09:25,436 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 01:09:25,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 01:09:25,440 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 01:09:25,445 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 01:09:25,446 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 01:09:25,447 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 01:09:25,447 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 01:09:25,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 01:09:25,451 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 01:09:25,451 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 01:09:25,452 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 01:09:25,452 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 01:09:25,453 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 01:09:25,454 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 01:09:25,454 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 01:09:25,455 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 01:09:25,456 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 01:09:25,457 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 01:09:25,457 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 01:09:25,458 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 01:09:25,458 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 01:09:25,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 01:09:25,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 01:09:25,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 01:09:25,460 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-26 01:09:25,498 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 01:09:25,498 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 01:09:25,499 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 01:09:25,499 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 01:09:25,499 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 01:09:25,500 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 01:09:25,500 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 01:09:25,500 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 01:09:25,500 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 01:09:25,500 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 01:09:25,501 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 01:09:25,501 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 01:09:25,501 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 01:09:25,501 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 01:09:25,501 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 01:09:25,502 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 01:09:25,502 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 01:09:25,502 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 01:09:25,506 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-26 01:09:25,506 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-26 01:09:25,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 01:09:25,507 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 01:09:25,507 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 01:09:25,507 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 01:09:25,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 01:09:25,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 01:09:25,508 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-26 01:09:25,509 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-26 01:09:25,509 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-26 01:09:25,510 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 01:09:25,510 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 01:09:25,510 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 01:09:25,510 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 01:09:25,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 01:09:25,511 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 01:09:25,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:09:25,512 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 01:09:25,512 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 01:09:25,512 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 01:09:25,512 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 01:09:25,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 01:09:25,513 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 01:09:25,513 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_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 882715956aab9fc92fb711e54ed51d64e792658e5015ed6151f84b857454f04c [2022-11-26 01:09:25,824 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 01:09:25,848 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 01:09:25,850 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 01:09:25,852 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 01:09:25,852 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 01:09:25,853 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/memsafety-ext/tree_stack.i [2022-11-26 01:09:28,825 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 01:09:29,135 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 01:09:29,142 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/sv-benchmarks/c/memsafety-ext/tree_stack.i [2022-11-26 01:09:29,161 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/data/4fb935c92/85422c22e6084c64b516b3c2a586e451/FLAG8704f6bff [2022-11-26 01:09:29,180 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/data/4fb935c92/85422c22e6084c64b516b3c2a586e451 [2022-11-26 01:09:29,184 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 01:09:29,187 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 01:09:29,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 01:09:29,191 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 01:09:29,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 01:09:29,197 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:09:29" (1/1) ... [2022-11-26 01:09:29,198 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5928bb2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:29, skipping insertion in model container [2022-11-26 01:09:29,198 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:09:29" (1/1) ... [2022-11-26 01:09:29,206 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 01:09:29,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:09:29,650 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:09:29,661 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 01:09:29,732 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:09:29,758 INFO L208 MainTranslator]: Completed translation [2022-11-26 01:09:29,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:29 WrapperNode [2022-11-26 01:09:29,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 01:09:29,760 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 01:09:29,760 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 01:09:29,761 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 01:09:29,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:29" (1/1) ... [2022-11-26 01:09:29,782 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:29" (1/1) ... [2022-11-26 01:09:29,821 INFO L138 Inliner]: procedures = 123, calls = 44, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 142 [2022-11-26 01:09:29,822 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 01:09:29,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 01:09:29,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 01:09:29,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 01:09:29,832 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:29" (1/1) ... [2022-11-26 01:09:29,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:29" (1/1) ... [2022-11-26 01:09:29,841 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:29" (1/1) ... [2022-11-26 01:09:29,841 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:29" (1/1) ... [2022-11-26 01:09:29,850 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:29" (1/1) ... [2022-11-26 01:09:29,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:29" (1/1) ... [2022-11-26 01:09:29,856 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:29" (1/1) ... [2022-11-26 01:09:29,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:29" (1/1) ... [2022-11-26 01:09:29,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 01:09:29,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 01:09:29,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 01:09:29,861 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 01:09:29,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:29" (1/1) ... [2022-11-26 01:09:29,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:09:29,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:09:29,909 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 01:09:29,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 01:09:29,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 01:09:29,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 01:09:29,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-26 01:09:29,954 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-26 01:09:29,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 01:09:29,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 01:09:29,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 01:09:29,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 01:09:30,123 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 01:09:30,125 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 01:09:30,635 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 01:09:30,735 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 01:09:30,735 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-26 01:09:30,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:09:30 BoogieIcfgContainer [2022-11-26 01:09:30,738 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 01:09:30,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 01:09:30,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 01:09:30,746 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 01:09:30,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 01:09:29" (1/3) ... [2022-11-26 01:09:30,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fb4cd2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:09:30, skipping insertion in model container [2022-11-26 01:09:30,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:29" (2/3) ... [2022-11-26 01:09:30,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fb4cd2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:09:30, skipping insertion in model container [2022-11-26 01:09:30,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:09:30" (3/3) ... [2022-11-26 01:09:30,751 INFO L112 eAbstractionObserver]: Analyzing ICFG tree_stack.i [2022-11-26 01:09:30,775 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 01:09:30,776 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 67 error locations. [2022-11-26 01:09:30,837 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 01:09:30,845 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;@3531c684, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 01:09:30,845 INFO L358 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2022-11-26 01:09:30,850 INFO L276 IsEmpty]: Start isEmpty. Operand has 117 states, 49 states have (on average 2.5918367346938775) internal successors, (127), 116 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:30,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-26 01:09:30,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:30,856 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-26 01:09:30,857 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 01:09:30,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:30,863 INFO L85 PathProgramCache]: Analyzing trace with hash 7754, now seen corresponding path program 1 times [2022-11-26 01:09:30,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:30,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444356751] [2022-11-26 01:09:30,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:30,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:30,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:31,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:09:31,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:31,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444356751] [2022-11-26 01:09:31,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444356751] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:31,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:09:31,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 01:09:31,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314388725] [2022-11-26 01:09:31,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:31,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:09:31,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:31,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:09:31,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:09:31,166 INFO L87 Difference]: Start difference. First operand has 117 states, 49 states have (on average 2.5918367346938775) internal successors, (127), 116 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:31,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:31,425 INFO L93 Difference]: Finished difference Result 131 states and 139 transitions. [2022-11-26 01:09:31,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:09:31,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-26 01:09:31,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:31,443 INFO L225 Difference]: With dead ends: 131 [2022-11-26 01:09:31,444 INFO L226 Difference]: Without dead ends: 129 [2022-11-26 01:09:31,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:09:31,454 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 84 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:31,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 88 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:09:31,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-26 01:09:31,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 114. [2022-11-26 01:09:31,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 49 states have (on average 2.489795918367347) internal successors, (122), 113 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:31,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 122 transitions. [2022-11-26 01:09:31,494 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 122 transitions. Word has length 2 [2022-11-26 01:09:31,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:31,495 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 122 transitions. [2022-11-26 01:09:31,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:31,496 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 122 transitions. [2022-11-26 01:09:31,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-26 01:09:31,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:31,496 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-26 01:09:31,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 01:09:31,497 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 01:09:31,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:31,498 INFO L85 PathProgramCache]: Analyzing trace with hash 7755, now seen corresponding path program 1 times [2022-11-26 01:09:31,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:31,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851063270] [2022-11-26 01:09:31,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:31,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:31,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:31,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:09:31,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:31,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851063270] [2022-11-26 01:09:31,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851063270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:31,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:09:31,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 01:09:31,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109707272] [2022-11-26 01:09:31,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:31,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:09:31,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:31,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:09:31,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:09:31,620 INFO L87 Difference]: Start difference. First operand 114 states and 122 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:31,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:31,809 INFO L93 Difference]: Finished difference Result 138 states and 152 transitions. [2022-11-26 01:09:31,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:09:31,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-26 01:09:31,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:31,817 INFO L225 Difference]: With dead ends: 138 [2022-11-26 01:09:31,817 INFO L226 Difference]: Without dead ends: 138 [2022-11-26 01:09:31,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:09:31,823 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 31 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:31,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 144 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:09:31,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-26 01:09:31,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 112. [2022-11-26 01:09:31,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 49 states have (on average 2.4489795918367347) internal successors, (120), 111 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:31,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2022-11-26 01:09:31,844 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 2 [2022-11-26 01:09:31,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:31,845 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2022-11-26 01:09:31,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:31,846 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2022-11-26 01:09:31,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 01:09:31,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:31,850 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 01:09:31,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 01:09:31,851 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 01:09:31,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:31,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1429684458, now seen corresponding path program 1 times [2022-11-26 01:09:31,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:31,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285251356] [2022-11-26 01:09:31,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:31,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:31,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:09:31,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:31,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285251356] [2022-11-26 01:09:31,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285251356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:31,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:09:31,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:09:31,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150036233] [2022-11-26 01:09:31,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:31,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:09:31,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:31,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:09:31,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:09:31,977 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:32,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:32,177 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2022-11-26 01:09:32,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:09:32,178 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 01:09:32,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:32,179 INFO L225 Difference]: With dead ends: 117 [2022-11-26 01:09:32,179 INFO L226 Difference]: Without dead ends: 117 [2022-11-26 01:09:32,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:09:32,180 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 137 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:32,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 63 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:09:32,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-26 01:09:32,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2022-11-26 01:09:32,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 50 states have (on average 2.14) internal successors, (107), 97 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:32,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 107 transitions. [2022-11-26 01:09:32,188 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 107 transitions. Word has length 6 [2022-11-26 01:09:32,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:32,189 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 107 transitions. [2022-11-26 01:09:32,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:32,189 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 107 transitions. [2022-11-26 01:09:32,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 01:09:32,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:32,190 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 01:09:32,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 01:09:32,190 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 01:09:32,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:32,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1429684457, now seen corresponding path program 1 times [2022-11-26 01:09:32,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:32,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895999993] [2022-11-26 01:09:32,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:32,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:32,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:09:32,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:32,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895999993] [2022-11-26 01:09:32,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895999993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:32,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:09:32,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:09:32,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800044426] [2022-11-26 01:09:32,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:32,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:09:32,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:32,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:09:32,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:09:32,377 INFO L87 Difference]: Start difference. First operand 98 states and 107 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:32,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:32,626 INFO L93 Difference]: Finished difference Result 129 states and 143 transitions. [2022-11-26 01:09:32,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:09:32,627 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 01:09:32,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:32,628 INFO L225 Difference]: With dead ends: 129 [2022-11-26 01:09:32,629 INFO L226 Difference]: Without dead ends: 129 [2022-11-26 01:09:32,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:09:32,630 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 160 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:32,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 73 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:09:32,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-26 01:09:32,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 117. [2022-11-26 01:09:32,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 69 states have (on average 1.9710144927536233) internal successors, (136), 116 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:32,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 136 transitions. [2022-11-26 01:09:32,647 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 136 transitions. Word has length 6 [2022-11-26 01:09:32,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:32,648 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 136 transitions. [2022-11-26 01:09:32,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:32,648 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 136 transitions. [2022-11-26 01:09:32,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 01:09:32,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:32,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:32,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 01:09:32,649 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 01:09:32,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:32,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1370543742, now seen corresponding path program 1 times [2022-11-26 01:09:32,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:32,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027290876] [2022-11-26 01:09:32,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:32,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:32,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:32,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:09:32,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:32,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027290876] [2022-11-26 01:09:32,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027290876] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:32,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:09:32,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:09:32,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129648582] [2022-11-26 01:09:32,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:32,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:09:32,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:32,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:09:32,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:09:32,736 INFO L87 Difference]: Start difference. First operand 117 states and 136 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:32,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:32,863 INFO L93 Difference]: Finished difference Result 136 states and 156 transitions. [2022-11-26 01:09:32,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:09:32,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-26 01:09:32,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:32,865 INFO L225 Difference]: With dead ends: 136 [2022-11-26 01:09:32,867 INFO L226 Difference]: Without dead ends: 136 [2022-11-26 01:09:32,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:09:32,873 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 22 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:32,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 133 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:09:32,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-26 01:09:32,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2022-11-26 01:09:32,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 71 states have (on average 1.943661971830986) internal successors, (138), 116 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:32,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 138 transitions. [2022-11-26 01:09:32,894 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 138 transitions. Word has length 7 [2022-11-26 01:09:32,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:32,896 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 138 transitions. [2022-11-26 01:09:32,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:32,898 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 138 transitions. [2022-11-26 01:09:32,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 01:09:32,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:32,898 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:32,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 01:09:32,899 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 01:09:32,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:32,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1370543741, now seen corresponding path program 1 times [2022-11-26 01:09:32,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:32,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56946351] [2022-11-26 01:09:32,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:32,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:33,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:09:33,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:33,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56946351] [2022-11-26 01:09:33,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56946351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:33,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:09:33,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:09:33,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111592104] [2022-11-26 01:09:33,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:33,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:09:33,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:33,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:09:33,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:09:33,020 INFO L87 Difference]: Start difference. First operand 117 states and 138 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:33,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:33,132 INFO L93 Difference]: Finished difference Result 117 states and 136 transitions. [2022-11-26 01:09:33,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:09:33,132 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-26 01:09:33,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:33,133 INFO L225 Difference]: With dead ends: 117 [2022-11-26 01:09:33,133 INFO L226 Difference]: Without dead ends: 117 [2022-11-26 01:09:33,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:09:33,136 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 5 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:33,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 116 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:09:33,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-26 01:09:33,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2022-11-26 01:09:33,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 71 states have (on average 1.9014084507042253) internal successors, (135), 114 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:33,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 135 transitions. [2022-11-26 01:09:33,146 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 135 transitions. Word has length 7 [2022-11-26 01:09:33,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:33,147 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 135 transitions. [2022-11-26 01:09:33,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:33,147 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 135 transitions. [2022-11-26 01:09:33,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 01:09:33,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:33,148 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:33,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 01:09:33,148 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 01:09:33,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:33,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1909395731, now seen corresponding path program 1 times [2022-11-26 01:09:33,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:33,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117973901] [2022-11-26 01:09:33,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:33,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:33,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:33,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:09:33,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:33,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117973901] [2022-11-26 01:09:33,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117973901] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:33,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:09:33,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:09:33,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478448660] [2022-11-26 01:09:33,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:33,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:09:33,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:33,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:09:33,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:09:33,211 INFO L87 Difference]: Start difference. First operand 115 states and 135 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:33,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:33,264 INFO L93 Difference]: Finished difference Result 115 states and 134 transitions. [2022-11-26 01:09:33,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:09:33,264 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-26 01:09:33,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:33,265 INFO L225 Difference]: With dead ends: 115 [2022-11-26 01:09:33,265 INFO L226 Difference]: Without dead ends: 115 [2022-11-26 01:09:33,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:09:33,268 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 1 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:33,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 155 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:09:33,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-26 01:09:33,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-11-26 01:09:33,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 71 states have (on average 1.8873239436619718) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:33,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2022-11-26 01:09:33,278 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 10 [2022-11-26 01:09:33,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:33,278 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2022-11-26 01:09:33,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:33,278 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2022-11-26 01:09:33,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 01:09:33,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:33,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:33,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 01:09:33,280 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 01:09:33,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:33,280 INFO L85 PathProgramCache]: Analyzing trace with hash 938190407, now seen corresponding path program 1 times [2022-11-26 01:09:33,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:33,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610782779] [2022-11-26 01:09:33,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:33,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:33,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:33,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:09:33,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:33,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610782779] [2022-11-26 01:09:33,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610782779] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:33,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:09:33,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:09:33,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854719705] [2022-11-26 01:09:33,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:33,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:09:33,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:33,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:09:33,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:09:33,405 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:33,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:33,549 INFO L93 Difference]: Finished difference Result 126 states and 146 transitions. [2022-11-26 01:09:33,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:09:33,549 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-26 01:09:33,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:33,550 INFO L225 Difference]: With dead ends: 126 [2022-11-26 01:09:33,550 INFO L226 Difference]: Without dead ends: 126 [2022-11-26 01:09:33,550 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 [2022-11-26 01:09:33,551 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 49 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:33,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 145 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:09:33,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-26 01:09:33,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 111. [2022-11-26 01:09:33,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 72 states have (on average 1.8194444444444444) internal successors, (131), 110 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:33,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 131 transitions. [2022-11-26 01:09:33,555 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 131 transitions. Word has length 11 [2022-11-26 01:09:33,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:33,555 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 131 transitions. [2022-11-26 01:09:33,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:33,555 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 131 transitions. [2022-11-26 01:09:33,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 01:09:33,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:33,556 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:33,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 01:09:33,556 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 01:09:33,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:33,557 INFO L85 PathProgramCache]: Analyzing trace with hash 938190408, now seen corresponding path program 1 times [2022-11-26 01:09:33,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:33,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343572264] [2022-11-26 01:09:33,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:33,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:33,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:33,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:09:33,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:33,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343572264] [2022-11-26 01:09:33,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343572264] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:33,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:09:33,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:09:33,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033867786] [2022-11-26 01:09:33,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:33,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:09:33,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:33,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:09:33,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:09:33,654 INFO L87 Difference]: Start difference. First operand 111 states and 131 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:33,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:33,844 INFO L93 Difference]: Finished difference Result 145 states and 167 transitions. [2022-11-26 01:09:33,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:09:33,845 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-26 01:09:33,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:33,845 INFO L225 Difference]: With dead ends: 145 [2022-11-26 01:09:33,846 INFO L226 Difference]: Without dead ends: 145 [2022-11-26 01:09:33,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:09:33,846 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 44 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:33,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 116 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:09:33,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-26 01:09:33,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 116. [2022-11-26 01:09:33,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 81 states have (on average 1.7530864197530864) internal successors, (142), 115 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:33,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 142 transitions. [2022-11-26 01:09:33,850 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 142 transitions. Word has length 11 [2022-11-26 01:09:33,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:33,850 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 142 transitions. [2022-11-26 01:09:33,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:33,851 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 142 transitions. [2022-11-26 01:09:33,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 01:09:33,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:33,851 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:33,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 01:09:33,851 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)] === [2022-11-26 01:09:33,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:33,852 INFO L85 PathProgramCache]: Analyzing trace with hash 960592271, now seen corresponding path program 1 times [2022-11-26 01:09:33,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:33,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790087209] [2022-11-26 01:09:33,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:33,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:33,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:34,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:09:34,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:34,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790087209] [2022-11-26 01:09:34,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790087209] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:34,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:09:34,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 01:09:34,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150257977] [2022-11-26 01:09:34,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:34,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:09:34,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:34,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:09:34,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:09:34,055 INFO L87 Difference]: Start difference. First operand 116 states and 142 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:34,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:34,249 INFO L93 Difference]: Finished difference Result 146 states and 177 transitions. [2022-11-26 01:09:34,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:09:34,249 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-26 01:09:34,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:34,250 INFO L225 Difference]: With dead ends: 146 [2022-11-26 01:09:34,250 INFO L226 Difference]: Without dead ends: 146 [2022-11-26 01:09:34,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:09:34,251 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 31 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:34,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 231 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:09:34,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-26 01:09:34,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 127. [2022-11-26 01:09:34,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 92 states have (on average 1.6956521739130435) internal successors, (156), 126 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:34,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 156 transitions. [2022-11-26 01:09:34,254 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 156 transitions. Word has length 11 [2022-11-26 01:09:34,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:34,254 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 156 transitions. [2022-11-26 01:09:34,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:34,255 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 156 transitions. [2022-11-26 01:09:34,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 01:09:34,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:34,255 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:34,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-26 01:09:34,255 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr45ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 01:09:34,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:34,256 INFO L85 PathProgramCache]: Analyzing trace with hash -342074958, now seen corresponding path program 1 times [2022-11-26 01:09:34,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:34,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948592889] [2022-11-26 01:09:34,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:34,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:34,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:34,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:09:34,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:34,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948592889] [2022-11-26 01:09:34,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948592889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:34,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:09:34,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:09:34,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198925127] [2022-11-26 01:09:34,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:34,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:09:34,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:34,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:09:34,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:09:34,356 INFO L87 Difference]: Start difference. First operand 127 states and 156 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:34,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:34,494 INFO L93 Difference]: Finished difference Result 139 states and 162 transitions. [2022-11-26 01:09:34,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 01:09:34,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-26 01:09:34,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:34,496 INFO L225 Difference]: With dead ends: 139 [2022-11-26 01:09:34,496 INFO L226 Difference]: Without dead ends: 139 [2022-11-26 01:09:34,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:09:34,496 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 38 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 229 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 [2022-11-26 01:09:34,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 229 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:09:34,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-26 01:09:34,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 128. [2022-11-26 01:09:34,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 93 states have (on average 1.6881720430107527) internal successors, (157), 127 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:34,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 157 transitions. [2022-11-26 01:09:34,500 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 157 transitions. Word has length 13 [2022-11-26 01:09:34,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:34,500 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 157 transitions. [2022-11-26 01:09:34,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:34,501 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 157 transitions. [2022-11-26 01:09:34,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 01:09:34,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:34,501 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:34,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-26 01:09:34,502 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 01:09:34,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:34,502 INFO L85 PathProgramCache]: Analyzing trace with hash -179356054, now seen corresponding path program 1 times [2022-11-26 01:09:34,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:34,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369925943] [2022-11-26 01:09:34,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:34,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:34,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:09:34,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:34,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369925943] [2022-11-26 01:09:34,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369925943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:34,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:09:34,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:09:34,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049044993] [2022-11-26 01:09:34,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:34,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:09:34,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:34,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:09:34,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:09:34,635 INFO L87 Difference]: Start difference. First operand 128 states and 157 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:34,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:34,801 INFO L93 Difference]: Finished difference Result 127 states and 155 transitions. [2022-11-26 01:09:34,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:09:34,802 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-26 01:09:34,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:34,803 INFO L225 Difference]: With dead ends: 127 [2022-11-26 01:09:34,803 INFO L226 Difference]: Without dead ends: 127 [2022-11-26 01:09:34,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:09:34,803 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 5 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:34,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 175 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:09:34,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-26 01:09:34,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-11-26 01:09:34,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 93 states have (on average 1.6666666666666667) internal successors, (155), 126 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:34,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 155 transitions. [2022-11-26 01:09:34,807 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 155 transitions. Word has length 13 [2022-11-26 01:09:34,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:34,808 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 155 transitions. [2022-11-26 01:09:34,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:34,808 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 155 transitions. [2022-11-26 01:09:34,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 01:09:34,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:34,809 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:34,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-26 01:09:34,809 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 01:09:34,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:34,810 INFO L85 PathProgramCache]: Analyzing trace with hash -179356053, now seen corresponding path program 1 times [2022-11-26 01:09:34,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:34,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392959593] [2022-11-26 01:09:34,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:34,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:34,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:35,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:09:35,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:35,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392959593] [2022-11-26 01:09:35,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392959593] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:35,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:09:35,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:09:35,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592795936] [2022-11-26 01:09:35,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:35,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:09:35,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:35,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:09:35,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:09:35,025 INFO L87 Difference]: Start difference. First operand 127 states and 155 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:35,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:35,204 INFO L93 Difference]: Finished difference Result 126 states and 153 transitions. [2022-11-26 01:09:35,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:09:35,205 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-26 01:09:35,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:35,205 INFO L225 Difference]: With dead ends: 126 [2022-11-26 01:09:35,205 INFO L226 Difference]: Without dead ends: 126 [2022-11-26 01:09:35,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:09:35,206 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:35,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 157 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:09:35,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-26 01:09:35,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-11-26 01:09:35,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 93 states have (on average 1.6451612903225807) internal successors, (153), 125 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:35,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 153 transitions. [2022-11-26 01:09:35,210 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 153 transitions. Word has length 13 [2022-11-26 01:09:35,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:35,210 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 153 transitions. [2022-11-26 01:09:35,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:35,210 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 153 transitions. [2022-11-26 01:09:35,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 01:09:35,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:35,212 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:35,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-26 01:09:35,213 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 01:09:35,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:35,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1978453205, now seen corresponding path program 1 times [2022-11-26 01:09:35,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:35,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466947757] [2022-11-26 01:09:35,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:35,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:35,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:35,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:09:35,600 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:35,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466947757] [2022-11-26 01:09:35,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466947757] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:35,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:09:35,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-26 01:09:35,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611504833] [2022-11-26 01:09:35,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:35,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-26 01:09:35,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:35,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-26 01:09:35,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-26 01:09:35,602 INFO L87 Difference]: Start difference. First operand 126 states and 153 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:36,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:36,173 INFO L93 Difference]: Finished difference Result 146 states and 173 transitions. [2022-11-26 01:09:36,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 01:09:36,173 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-26 01:09:36,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:36,174 INFO L225 Difference]: With dead ends: 146 [2022-11-26 01:09:36,174 INFO L226 Difference]: Without dead ends: 146 [2022-11-26 01:09:36,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-11-26 01:09:36,175 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 200 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:36,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 177 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 01:09:36,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-26 01:09:36,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 130. [2022-11-26 01:09:36,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 97 states have (on average 1.6288659793814433) internal successors, (158), 129 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:36,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 158 transitions. [2022-11-26 01:09:36,178 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 158 transitions. Word has length 15 [2022-11-26 01:09:36,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:36,179 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 158 transitions. [2022-11-26 01:09:36,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:36,179 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 158 transitions. [2022-11-26 01:09:36,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 01:09:36,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:36,179 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:36,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-26 01:09:36,180 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 01:09:36,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:36,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1978453206, now seen corresponding path program 1 times [2022-11-26 01:09:36,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:36,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608535199] [2022-11-26 01:09:36,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:36,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:36,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:36,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:09:36,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:36,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608535199] [2022-11-26 01:09:36,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608535199] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:36,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:09:36,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 01:09:36,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068393054] [2022-11-26 01:09:36,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:36,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-26 01:09:36,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:36,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-26 01:09:36,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-26 01:09:36,738 INFO L87 Difference]: Start difference. First operand 130 states and 158 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:37,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:37,571 INFO L93 Difference]: Finished difference Result 175 states and 205 transitions. [2022-11-26 01:09:37,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 01:09:37,571 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-26 01:09:37,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:37,572 INFO L225 Difference]: With dead ends: 175 [2022-11-26 01:09:37,572 INFO L226 Difference]: Without dead ends: 175 [2022-11-26 01:09:37,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-11-26 01:09:37,573 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 308 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:37,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 146 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 01:09:37,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-26 01:09:37,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 143. [2022-11-26 01:09:37,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 110 states have (on average 1.5727272727272728) internal successors, (173), 142 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:37,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 173 transitions. [2022-11-26 01:09:37,577 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 173 transitions. Word has length 15 [2022-11-26 01:09:37,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:37,578 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 173 transitions. [2022-11-26 01:09:37,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:37,578 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 173 transitions. [2022-11-26 01:09:37,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 01:09:37,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:37,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:37,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-26 01:09:37,579 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 01:09:37,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:37,579 INFO L85 PathProgramCache]: Analyzing trace with hash -562335971, now seen corresponding path program 1 times [2022-11-26 01:09:37,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:37,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564249790] [2022-11-26 01:09:37,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:37,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:37,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:37,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:09:37,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:37,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564249790] [2022-11-26 01:09:37,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564249790] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:37,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:09:37,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 01:09:37,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967995745] [2022-11-26 01:09:37,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:37,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 01:09:37,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:37,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 01:09:37,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-26 01:09:37,796 INFO L87 Difference]: Start difference. First operand 143 states and 173 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:38,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:38,129 INFO L93 Difference]: Finished difference Result 145 states and 175 transitions. [2022-11-26 01:09:38,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 01:09:38,130 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-26 01:09:38,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:38,131 INFO L225 Difference]: With dead ends: 145 [2022-11-26 01:09:38,131 INFO L226 Difference]: Without dead ends: 145 [2022-11-26 01:09:38,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-11-26 01:09:38,132 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 111 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:38,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 151 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:09:38,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-26 01:09:38,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2022-11-26 01:09:38,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 110 states have (on average 1.5545454545454545) internal successors, (171), 141 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:38,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 171 transitions. [2022-11-26 01:09:38,135 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 171 transitions. Word has length 15 [2022-11-26 01:09:38,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:38,135 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 171 transitions. [2022-11-26 01:09:38,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:38,135 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 171 transitions. [2022-11-26 01:09:38,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 01:09:38,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:38,136 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:38,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-26 01:09:38,136 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 01:09:38,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:38,137 INFO L85 PathProgramCache]: Analyzing trace with hash -562335970, now seen corresponding path program 1 times [2022-11-26 01:09:38,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:38,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729110620] [2022-11-26 01:09:38,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:38,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:38,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:38,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:09:38,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:38,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729110620] [2022-11-26 01:09:38,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729110620] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:38,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:09:38,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 01:09:38,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160066779] [2022-11-26 01:09:38,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:38,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 01:09:38,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:38,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 01:09:38,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-26 01:09:38,429 INFO L87 Difference]: Start difference. First operand 142 states and 171 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:38,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:38,800 INFO L93 Difference]: Finished difference Result 144 states and 173 transitions. [2022-11-26 01:09:38,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 01:09:38,801 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-26 01:09:38,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:38,801 INFO L225 Difference]: With dead ends: 144 [2022-11-26 01:09:38,801 INFO L226 Difference]: Without dead ends: 144 [2022-11-26 01:09:38,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-11-26 01:09:38,802 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 110 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:38,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 146 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:09:38,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-26 01:09:38,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2022-11-26 01:09:38,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 110 states have (on average 1.5363636363636364) internal successors, (169), 140 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:38,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 169 transitions. [2022-11-26 01:09:38,817 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 169 transitions. Word has length 15 [2022-11-26 01:09:38,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:38,818 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 169 transitions. [2022-11-26 01:09:38,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:38,818 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 169 transitions. [2022-11-26 01:09:38,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 01:09:38,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:38,818 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:38,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-26 01:09:38,819 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 01:09:38,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:38,819 INFO L85 PathProgramCache]: Analyzing trace with hash 15734262, now seen corresponding path program 1 times [2022-11-26 01:09:38,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:38,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902918138] [2022-11-26 01:09:38,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:38,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:38,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:09:38,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:38,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902918138] [2022-11-26 01:09:38,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902918138] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:38,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:09:38,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:09:38,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333534056] [2022-11-26 01:09:38,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:38,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:09:38,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:38,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:09:38,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:09:38,912 INFO L87 Difference]: Start difference. First operand 141 states and 169 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:39,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:39,068 INFO L93 Difference]: Finished difference Result 140 states and 167 transitions. [2022-11-26 01:09:39,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:09:39,069 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-26 01:09:39,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:39,069 INFO L225 Difference]: With dead ends: 140 [2022-11-26 01:09:39,069 INFO L226 Difference]: Without dead ends: 140 [2022-11-26 01:09:39,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:09:39,070 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 5 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:39,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 165 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:09:39,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-26 01:09:39,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2022-11-26 01:09:39,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.518181818181818) internal successors, (167), 139 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:39,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 167 transitions. [2022-11-26 01:09:39,073 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 167 transitions. Word has length 15 [2022-11-26 01:09:39,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:39,074 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 167 transitions. [2022-11-26 01:09:39,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:39,074 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 167 transitions. [2022-11-26 01:09:39,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 01:09:39,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:39,074 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:39,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-26 01:09:39,075 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 01:09:39,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:39,075 INFO L85 PathProgramCache]: Analyzing trace with hash 15734263, now seen corresponding path program 1 times [2022-11-26 01:09:39,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:39,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067225358] [2022-11-26 01:09:39,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:39,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:39,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:39,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:09:39,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:39,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067225358] [2022-11-26 01:09:39,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067225358] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:39,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:09:39,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:09:39,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822412472] [2022-11-26 01:09:39,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:39,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:09:39,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:39,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:09:39,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:09:39,225 INFO L87 Difference]: Start difference. First operand 140 states and 167 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:39,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:39,399 INFO L93 Difference]: Finished difference Result 139 states and 165 transitions. [2022-11-26 01:09:39,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:09:39,399 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-26 01:09:39,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:39,400 INFO L225 Difference]: With dead ends: 139 [2022-11-26 01:09:39,400 INFO L226 Difference]: Without dead ends: 139 [2022-11-26 01:09:39,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:09:39,401 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 3 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:39,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 147 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:09:39,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-26 01:09:39,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-11-26 01:09:39,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 110 states have (on average 1.5) internal successors, (165), 138 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:39,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 165 transitions. [2022-11-26 01:09:39,404 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 165 transitions. Word has length 15 [2022-11-26 01:09:39,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:39,404 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 165 transitions. [2022-11-26 01:09:39,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:39,405 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 165 transitions. [2022-11-26 01:09:39,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-26 01:09:39,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:39,405 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:39,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-26 01:09:39,405 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 01:09:39,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:39,406 INFO L85 PathProgramCache]: Analyzing trace with hash -2059133944, now seen corresponding path program 1 times [2022-11-26 01:09:39,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:39,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057557035] [2022-11-26 01:09:39,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:39,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:39,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:39,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:09:39,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:39,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057557035] [2022-11-26 01:09:39,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057557035] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:39,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:09:39,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 01:09:39,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283055993] [2022-11-26 01:09:39,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:39,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 01:09:39,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:39,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 01:09:39,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-26 01:09:39,614 INFO L87 Difference]: Start difference. First operand 139 states and 165 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:39,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:39,962 INFO L93 Difference]: Finished difference Result 141 states and 168 transitions. [2022-11-26 01:09:39,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 01:09:39,963 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-26 01:09:39,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:39,963 INFO L225 Difference]: With dead ends: 141 [2022-11-26 01:09:39,964 INFO L226 Difference]: Without dead ends: 141 [2022-11-26 01:09:39,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-11-26 01:09:39,964 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 103 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:39,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 171 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:09:39,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-26 01:09:39,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2022-11-26 01:09:39,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 110 states have (on average 1.490909090909091) internal successors, (164), 137 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:39,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 164 transitions. [2022-11-26 01:09:39,968 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 164 transitions. Word has length 17 [2022-11-26 01:09:39,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:39,968 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 164 transitions. [2022-11-26 01:09:39,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:39,968 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 164 transitions. [2022-11-26 01:09:39,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-26 01:09:39,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:39,969 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:39,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-26 01:09:39,969 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 01:09:39,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:39,970 INFO L85 PathProgramCache]: Analyzing trace with hash -2059133943, now seen corresponding path program 1 times [2022-11-26 01:09:39,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:39,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739444366] [2022-11-26 01:09:39,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:39,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:39,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:40,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:09:40,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:40,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739444366] [2022-11-26 01:09:40,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739444366] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:40,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:09:40,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 01:09:40,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764328219] [2022-11-26 01:09:40,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:40,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 01:09:40,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:40,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 01:09:40,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-26 01:09:40,260 INFO L87 Difference]: Start difference. First operand 138 states and 164 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:40,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:40,564 INFO L93 Difference]: Finished difference Result 140 states and 167 transitions. [2022-11-26 01:09:40,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 01:09:40,565 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-26 01:09:40,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:40,566 INFO L225 Difference]: With dead ends: 140 [2022-11-26 01:09:40,566 INFO L226 Difference]: Without dead ends: 140 [2022-11-26 01:09:40,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-11-26 01:09:40,567 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 100 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:40,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 122 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:09:40,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-26 01:09:40,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2022-11-26 01:09:40,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 110 states have (on average 1.481818181818182) internal successors, (163), 136 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:40,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 163 transitions. [2022-11-26 01:09:40,570 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 163 transitions. Word has length 17 [2022-11-26 01:09:40,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:40,571 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 163 transitions. [2022-11-26 01:09:40,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:40,571 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 163 transitions. [2022-11-26 01:09:40,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-26 01:09:40,571 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:40,571 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:40,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-26 01:09:40,572 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 01:09:40,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:40,572 INFO L85 PathProgramCache]: Analyzing trace with hash -301420817, now seen corresponding path program 1 times [2022-11-26 01:09:40,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:40,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284043604] [2022-11-26 01:09:40,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:40,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:40,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:40,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:09:40,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:40,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284043604] [2022-11-26 01:09:40,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284043604] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:40,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:09:40,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-26 01:09:40,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889486156] [2022-11-26 01:09:40,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:40,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 01:09:40,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:40,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 01:09:40,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-26 01:09:40,826 INFO L87 Difference]: Start difference. First operand 137 states and 163 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:41,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:41,306 INFO L93 Difference]: Finished difference Result 160 states and 188 transitions. [2022-11-26 01:09:41,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 01:09:41,307 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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 20 [2022-11-26 01:09:41,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:41,307 INFO L225 Difference]: With dead ends: 160 [2022-11-26 01:09:41,307 INFO L226 Difference]: Without dead ends: 160 [2022-11-26 01:09:41,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-11-26 01:09:41,308 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 230 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:41,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 235 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:09:41,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-26 01:09:41,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 139. [2022-11-26 01:09:41,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 112 states have (on average 1.4732142857142858) internal successors, (165), 138 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:41,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 165 transitions. [2022-11-26 01:09:41,312 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 165 transitions. Word has length 20 [2022-11-26 01:09:41,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:41,312 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 165 transitions. [2022-11-26 01:09:41,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:41,312 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 165 transitions. [2022-11-26 01:09:41,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-26 01:09:41,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:41,313 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:41,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-26 01:09:41,313 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 01:09:41,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:41,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1149286205, now seen corresponding path program 1 times [2022-11-26 01:09:41,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:41,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112471869] [2022-11-26 01:09:41,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:41,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:41,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:41,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:09:41,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:41,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112471869] [2022-11-26 01:09:41,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112471869] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:09:41,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868552353] [2022-11-26 01:09:41,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:41,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:09:41,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:09:41,493 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:09:41,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 01:09:41,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:41,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 01:09:41,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:09:41,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:09:41,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:09:41,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 01:09:41,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 01:09:41,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 01:09:41,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 01:09:41,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:09:41,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:09:41,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:09:41,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868552353] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:09:41,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [704609819] [2022-11-26 01:09:41,947 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-26 01:09:41,948 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:09:41,952 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:09:41,958 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:09:41,958 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:09:42,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:42,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:42,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 01:09:42,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:42,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-26 01:09:42,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:09:42,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:09:42,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:42,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-26 01:09:42,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:42,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 01:09:42,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:42,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 01:09:42,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:42,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:42,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:42,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:42,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:42,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-26 01:09:42,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:42,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:42,256 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 28 treesize of output 30 [2022-11-26 01:09:42,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:42,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:42,277 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 28 treesize of output 30 [2022-11-26 01:09:42,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:42,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-26 01:09:42,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:42,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:42,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:42,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-26 01:09:42,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:42,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:42,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:42,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-26 01:09:42,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:42,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-26 01:09:43,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:09:43,549 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:09:46,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [704609819] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:46,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:09:46,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [4, 4, 4] total 21 [2022-11-26 01:09:46,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140230064] [2022-11-26 01:09:46,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:46,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-26 01:09:46,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:46,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-26 01:09:46,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-11-26 01:09:46,754 INFO L87 Difference]: Start difference. First operand 139 states and 165 transitions. Second operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:49,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:49,206 INFO L93 Difference]: Finished difference Result 176 states and 206 transitions. [2022-11-26 01:09:49,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-26 01:09:49,208 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 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 23 [2022-11-26 01:09:49,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:49,209 INFO L225 Difference]: With dead ends: 176 [2022-11-26 01:09:49,209 INFO L226 Difference]: Without dead ends: 176 [2022-11-26 01:09:49,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-11-26 01:09:49,210 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 24 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:49,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 134 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 01:09:49,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-11-26 01:09:49,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 165. [2022-11-26 01:09:49,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 138 states have (on average 1.4710144927536233) internal successors, (203), 164 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:49,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 203 transitions. [2022-11-26 01:09:49,214 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 203 transitions. Word has length 23 [2022-11-26 01:09:49,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:49,214 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 203 transitions. [2022-11-26 01:09:49,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:09:49,214 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 203 transitions. [2022-11-26 01:09:49,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-26 01:09:49,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:49,215 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] [2022-11-26 01:09:49,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 01:09:49,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:09:49,416 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 01:09:49,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:49,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1149288995, now seen corresponding path program 1 times [2022-11-26 01:09:49,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:49,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640613678] [2022-11-26 01:09:49,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:49,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:49,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:49,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:09:49,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:49,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640613678] [2022-11-26 01:09:49,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640613678] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:09:49,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819607107] [2022-11-26 01:09:49,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:49,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:09:49,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:09:49,799 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:09:49,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 01:09:49,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:49,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-26 01:09:49,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:09:50,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:09:50,197 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:09:50,197 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 44 treesize of output 34 [2022-11-26 01:09:50,365 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 01:09:50,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 29 [2022-11-26 01:09:50,496 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 01:09:50,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 32 [2022-11-26 01:09:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:09:50,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:09:50,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-26 01:09:50,691 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 38 treesize of output 36 [2022-11-26 01:10:28,900 WARN L233 SmtUtils]: Spent 30.05s on a formula simplification. DAG size of input: 25 DAG size of output: 22 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:10:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:10:29,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819607107] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:10:29,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1310045840] [2022-11-26 01:10:29,055 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-26 01:10:29,056 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:10:29,056 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:10:29,056 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:10:29,056 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:10:29,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:29,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:29,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 01:10:29,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:10:29,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:29,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-26 01:10:29,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:10:29,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:29,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 01:10:29,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:29,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-26 01:10:29,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:29,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 01:10:29,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:29,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:29,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:29,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:29,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:29,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-26 01:10:29,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:29,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:29,233 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 28 treesize of output 30 [2022-11-26 01:10:29,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:29,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:29,248 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 28 treesize of output 30 [2022-11-26 01:10:29,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:29,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-26 01:10:29,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:29,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:29,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:29,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-26 01:10:29,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:29,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-26 01:10:29,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:29,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:29,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:29,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-26 01:10:30,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:10:30,287 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:10:34,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1310045840] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:10:34,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:10:34,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [9, 8, 8] total 39 [2022-11-26 01:10:34,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928718614] [2022-11-26 01:10:34,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:10:34,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 01:10:34,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:34,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 01:10:34,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1443, Unknown=1, NotChecked=0, Total=1640 [2022-11-26 01:10:34,698 INFO L87 Difference]: Start difference. First operand 165 states and 203 transitions. Second operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:10:36,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:36,974 INFO L93 Difference]: Finished difference Result 173 states and 203 transitions. [2022-11-26 01:10:36,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-26 01:10:36,975 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 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 23 [2022-11-26 01:10:36,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:36,976 INFO L225 Difference]: With dead ends: 173 [2022-11-26 01:10:36,976 INFO L226 Difference]: Without dead ends: 172 [2022-11-26 01:10:36,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 44.2s TimeCoverageRelationStatistics Valid=217, Invalid=1588, Unknown=1, NotChecked=0, Total=1806 [2022-11-26 01:10:36,977 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 17 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:10:36,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 162 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-26 01:10:36,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-26 01:10:36,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 165. [2022-11-26 01:10:36,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 138 states have (on average 1.463768115942029) internal successors, (202), 164 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:10:36,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 202 transitions. [2022-11-26 01:10:36,981 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 202 transitions. Word has length 23 [2022-11-26 01:10:36,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:36,982 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 202 transitions. [2022-11-26 01:10:36,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:10:36,982 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 202 transitions. [2022-11-26 01:10:36,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-26 01:10:36,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:36,983 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] [2022-11-26 01:10:36,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 01:10:37,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-26 01:10:37,191 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 01:10:37,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:37,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1268136401, now seen corresponding path program 1 times [2022-11-26 01:10:37,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:37,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731480514] [2022-11-26 01:10:37,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:37,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:37,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:37,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:10:37,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:37,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731480514] [2022-11-26 01:10:37,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731480514] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:10:37,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60132298] [2022-11-26 01:10:37,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:37,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:37,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:10:37,359 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:10:37,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 01:10:37,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:37,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 01:10:37,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:10:37,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:10:37,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:10:37,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60132298] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:10:37,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:10:37,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-26 01:10:37,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720035903] [2022-11-26 01:10:37,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:10:37,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:10:37,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:37,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:10:37,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:10:37,512 INFO L87 Difference]: Start difference. First operand 165 states and 202 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:10:37,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:37,627 INFO L93 Difference]: Finished difference Result 169 states and 200 transitions. [2022-11-26 01:10:37,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:10:37,628 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 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 24 [2022-11-26 01:10:37,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:37,629 INFO L225 Difference]: With dead ends: 169 [2022-11-26 01:10:37,629 INFO L226 Difference]: Without dead ends: 169 [2022-11-26 01:10:37,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:10:37,629 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 33 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:10:37,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 139 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:10:37,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-26 01:10:37,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 164. [2022-11-26 01:10:37,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 138 states have (on average 1.4420289855072463) internal successors, (199), 163 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:10:37,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 199 transitions. [2022-11-26 01:10:37,633 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 199 transitions. Word has length 24 [2022-11-26 01:10:37,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:37,633 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 199 transitions. [2022-11-26 01:10:37,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:10:37,638 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 199 transitions. [2022-11-26 01:10:37,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-26 01:10:37,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:37,639 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] [2022-11-26 01:10:37,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 01:10:37,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-26 01:10:37,844 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 01:10:37,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:37,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1268136402, now seen corresponding path program 1 times [2022-11-26 01:10:37,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:37,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035030452] [2022-11-26 01:10:37,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:37,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:37,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:37,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:10:37,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:37,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035030452] [2022-11-26 01:10:37,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035030452] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:10:37,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588416699] [2022-11-26 01:10:37,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:37,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:37,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:10:37,979 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:10:37,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 01:10:38,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:38,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 01:10:38,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:10:38,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:10:38,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:10:38,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 01:10:38,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 01:10:38,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 01:10:38,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 01:10:38,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:10:38,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:10:38,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:10:38,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588416699] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:10:38,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1793565645] [2022-11-26 01:10:38,259 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-26 01:10:38,260 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:10:38,260 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:10:38,260 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:10:38,260 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:10:38,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:38,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:38,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 01:10:38,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:38,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-26 01:10:38,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:10:38,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:10:38,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:38,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 01:10:38,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:38,340 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 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-26 01:10:38,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:38,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 01:10:38,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:38,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:38,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:38,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:38,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:38,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-26 01:10:38,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:38,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-26 01:10:38,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:38,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:38,461 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 28 treesize of output 30 [2022-11-26 01:10:38,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:38,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:38,477 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 28 treesize of output 30 [2022-11-26 01:10:38,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:38,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:38,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:38,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-26 01:10:38,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:38,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-26 01:10:38,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:38,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:38,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:38,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-26 01:10:39,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:10:39,428 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:10:42,837 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7726#(and (= |ULTIMATE.start_main_~root~0#1.offset| 0) (<= |#NULL.offset| 0) (< (select |#length| |ULTIMATE.start_main_~st~0#1.base|) (+ |ULTIMATE.start_main_~st~0#1.offset| 8)) (<= 0 |ULTIMATE.start_main_~st~0#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-26 01:10:42,837 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:10:42,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:10:42,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-11-26 01:10:42,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38161104] [2022-11-26 01:10:42,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:10:42,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:10:42,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:42,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:10:42,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-11-26 01:10:42,839 INFO L87 Difference]: Start difference. First operand 164 states and 199 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:10:42,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:42,934 INFO L93 Difference]: Finished difference Result 160 states and 186 transitions. [2022-11-26 01:10:42,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:10:42,935 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 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 24 [2022-11-26 01:10:42,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:42,936 INFO L225 Difference]: With dead ends: 160 [2022-11-26 01:10:42,936 INFO L226 Difference]: Without dead ends: 156 [2022-11-26 01:10:42,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-11-26 01:10:42,938 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 7 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:10:42,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 164 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:10:42,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-11-26 01:10:42,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2022-11-26 01:10:42,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 127 states have (on average 1.4094488188976377) internal successors, (179), 152 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:10:42,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 179 transitions. [2022-11-26 01:10:42,944 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 179 transitions. Word has length 24 [2022-11-26 01:10:42,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:42,944 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 179 transitions. [2022-11-26 01:10:42,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:10:42,945 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 179 transitions. [2022-11-26 01:10:42,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-26 01:10:42,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:42,945 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:10:42,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 01:10:43,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:43,151 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 01:10:43,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:43,151 INFO L85 PathProgramCache]: Analyzing trace with hash -2032630120, now seen corresponding path program 1 times [2022-11-26 01:10:43,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:43,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704952269] [2022-11-26 01:10:43,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:43,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:43,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:43,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:10:43,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:43,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704952269] [2022-11-26 01:10:43,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704952269] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:10:43,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:10:43,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 01:10:43,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563699884] [2022-11-26 01:10:43,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:10:43,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 01:10:43,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:43,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 01:10:43,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:10:43,312 INFO L87 Difference]: Start difference. First operand 153 states and 179 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:10:43,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:43,540 INFO L93 Difference]: Finished difference Result 168 states and 190 transitions. [2022-11-26 01:10:43,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 01:10:43,540 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-26 01:10:43,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:43,541 INFO L225 Difference]: With dead ends: 168 [2022-11-26 01:10:43,541 INFO L226 Difference]: Without dead ends: 168 [2022-11-26 01:10:43,541 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 [2022-11-26 01:10:43,542 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 109 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:10:43,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 91 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:10:43,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-26 01:10:43,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 153. [2022-11-26 01:10:43,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 127 states have (on average 1.4015748031496063) internal successors, (178), 152 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:10:43,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 178 transitions. [2022-11-26 01:10:43,545 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 178 transitions. Word has length 26 [2022-11-26 01:10:43,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:43,545 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 178 transitions. [2022-11-26 01:10:43,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:10:43,545 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 178 transitions. [2022-11-26 01:10:43,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-26 01:10:43,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:43,546 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:10:43,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-26 01:10:43,546 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 01:10:43,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:43,546 INFO L85 PathProgramCache]: Analyzing trace with hash -2032627330, now seen corresponding path program 1 times [2022-11-26 01:10:43,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:43,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236592697] [2022-11-26 01:10:43,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:43,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:43,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:43,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:10:43,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:43,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236592697] [2022-11-26 01:10:43,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236592697] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:10:43,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:10:43,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:10:43,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273638065] [2022-11-26 01:10:43,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:10:43,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:10:43,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:43,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:10:43,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:10:43,607 INFO L87 Difference]: Start difference. First operand 153 states and 178 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:10:43,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:43,694 INFO L93 Difference]: Finished difference Result 179 states and 202 transitions. [2022-11-26 01:10:43,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:10:43,694 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-26 01:10:43,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:43,695 INFO L225 Difference]: With dead ends: 179 [2022-11-26 01:10:43,695 INFO L226 Difference]: Without dead ends: 179 [2022-11-26 01:10:43,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:10:43,696 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 41 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:10:43,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 169 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:10:43,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-11-26 01:10:43,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 153. [2022-11-26 01:10:43,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 127 states have (on average 1.3937007874015748) internal successors, (177), 152 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:10:43,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 177 transitions. [2022-11-26 01:10:43,699 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 177 transitions. Word has length 26 [2022-11-26 01:10:43,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:43,699 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 177 transitions. [2022-11-26 01:10:43,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:10:43,699 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 177 transitions. [2022-11-26 01:10:43,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-26 01:10:43,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:43,700 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:10:43,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-26 01:10:43,700 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)] === [2022-11-26 01:10:43,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:43,700 INFO L85 PathProgramCache]: Analyzing trace with hash 443527177, now seen corresponding path program 1 times [2022-11-26 01:10:43,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:43,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102650682] [2022-11-26 01:10:43,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:43,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:43,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:44,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:10:44,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:44,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102650682] [2022-11-26 01:10:44,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102650682] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:10:44,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662984677] [2022-11-26 01:10:44,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:44,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:44,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:10:44,435 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:10:44,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 01:10:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:44,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-26 01:10:44,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:10:44,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 01:10:44,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 01:10:44,824 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 01:10:44,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-26 01:10:44,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:44,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 01:10:44,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:44,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 01:10:45,027 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 01:10:45,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 37 [2022-11-26 01:10:45,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-26 01:10:45,157 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 01:10:45,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-11-26 01:10:45,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-26 01:10:45,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:45,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 37 [2022-11-26 01:10:45,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:45,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:45,501 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:10:45,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 24 [2022-11-26 01:10:45,506 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:10:45,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:10:46,147 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|))) (and (forall ((|v_ULTIMATE.start_main_~n~0#1.offset_86| Int) (v_ArrVal_904 (Array Int Int)) (v_ArrVal_906 (Array Int Int)) (v_ArrVal_905 (Array Int Int))) (or (not (<= |v_ULTIMATE.start_main_~n~0#1.offset_86| |c_ULTIMATE.start_main_~root~0#1.offset|)) (= (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_904) (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_905) |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|) v_ArrVal_906) |c_ULTIMATE.start_main_~root~0#1.base|) (+ |v_ULTIMATE.start_main_~n~0#1.offset_86| 4)) 0) (not (<= 0 |v_ULTIMATE.start_main_~n~0#1.offset_86|)))) (forall ((|v_ULTIMATE.start_main_~n~0#1.offset_86| Int) (v_ArrVal_905 (Array Int Int)) (v_ArrVal_907 (Array Int Int))) (or (not (<= |v_ULTIMATE.start_main_~n~0#1.offset_86| |c_ULTIMATE.start_main_~root~0#1.offset|)) (= (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_905))) (store .cse1 (select (select .cse1 |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|) v_ArrVal_907)) |c_ULTIMATE.start_main_~root~0#1.base|) (+ |v_ULTIMATE.start_main_~n~0#1.offset_86| 4)) 0) (not (<= 0 |v_ULTIMATE.start_main_~n~0#1.offset_86|)))))) is different from false [2022-11-26 01:10:46,188 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset| |c_ULTIMATE.start_main_#t~malloc14#1.base|)))) (and (forall ((|v_ULTIMATE.start_main_~n~0#1.offset_86| Int) (v_ArrVal_905 (Array Int Int)) (v_ArrVal_907 (Array Int Int))) (or (not (<= |v_ULTIMATE.start_main_~n~0#1.offset_86| |c_ULTIMATE.start_main_~root~0#1.offset|)) (= 0 (select (select (let ((.cse0 (store .cse1 |c_ULTIMATE.start_main_#t~malloc14#1.base| v_ArrVal_905))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|) v_ArrVal_907)) |c_ULTIMATE.start_main_~root~0#1.base|) (+ |v_ULTIMATE.start_main_~n~0#1.offset_86| 4))) (not (<= 0 |v_ULTIMATE.start_main_~n~0#1.offset_86|)))) (forall ((|v_ULTIMATE.start_main_~n~0#1.offset_86| Int) (v_ArrVal_904 (Array Int Int)) (v_ArrVal_906 (Array Int Int)) (v_ArrVal_905 (Array Int Int)) (v_ArrVal_901 Int)) (or (not (<= |v_ULTIMATE.start_main_~n~0#1.offset_86| |c_ULTIMATE.start_main_~root~0#1.offset|)) (not (<= 0 |v_ULTIMATE.start_main_~n~0#1.offset_86|)) (= (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~n~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset| v_ArrVal_901)) |c_ULTIMATE.start_main_#t~malloc14#1.base| v_ArrVal_904) (select (select (store .cse1 |c_ULTIMATE.start_main_#t~malloc14#1.base| v_ArrVal_905) |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|) v_ArrVal_906) |c_ULTIMATE.start_main_~root~0#1.base|) (+ |v_ULTIMATE.start_main_~n~0#1.offset_86| 4)) 0))))) is different from false [2022-11-26 01:10:46,510 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:10:46,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 132 [2022-11-26 01:10:52,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:52,072 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:10:52,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 54 [2022-11-26 01:10:52,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:52,089 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:10:52,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2022-11-26 01:10:52,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:52,099 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 72 treesize of output 46 [2022-11-26 01:10:52,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:52,112 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-26 01:10:52,112 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 20 treesize of output 11 [2022-11-26 01:10:52,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:52,132 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-11-26 01:10:52,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 1 [2022-11-26 01:10:52,151 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:10:52,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662984677] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:10:52,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1585740632] [2022-11-26 01:10:52,153 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-26 01:10:52,154 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:10:52,154 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:10:52,154 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:10:52,154 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:10:52,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:52,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:52,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 01:10:52,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:10:52,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:10:52,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:52,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-26 01:10:52,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:52,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 01:10:52,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:52,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-26 01:10:52,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:52,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 01:10:52,572 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:10:52,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-26 01:10:52,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 01:10:52,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-26 01:10:52,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-26 01:10:52,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 01:10:52,631 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-26 01:10:52,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 92 [2022-11-26 01:10:52,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 74 [2022-11-26 01:10:52,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 1 [2022-11-26 01:10:52,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:52,679 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-26 01:10:52,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 176 treesize of output 125 [2022-11-26 01:10:52,697 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-26 01:10:52,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 110 [2022-11-26 01:10:52,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 1 [2022-11-26 01:10:53,059 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:10:53,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-26 01:10:53,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 01:10:53,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-26 01:10:53,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-26 01:10:53,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 01:10:53,114 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-26 01:10:53,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 92 [2022-11-26 01:10:53,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 74 [2022-11-26 01:10:53,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 1 [2022-11-26 01:10:53,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:53,167 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-26 01:10:53,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 176 treesize of output 125 [2022-11-26 01:10:53,185 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-26 01:10:53,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 110 [2022-11-26 01:10:53,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 1 [2022-11-26 01:10:53,557 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:10:53,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-26 01:10:53,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 01:10:53,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-26 01:10:53,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 01:10:53,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-26 01:10:53,615 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-26 01:10:53,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 92 [2022-11-26 01:10:53,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 74 [2022-11-26 01:10:53,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2022-11-26 01:10:53,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:53,663 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 01:10:53,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 168 treesize of output 117 [2022-11-26 01:10:53,681 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-26 01:10:53,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 96 [2022-11-26 01:10:53,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2022-11-26 01:10:53,728 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:10:56,295 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8915#(and (= |ULTIMATE.start_main_~root~0#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_main_~n~0#1.base|) 1)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:10:56,295 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:10:56,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:10:56,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 34 [2022-11-26 01:10:56,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319745946] [2022-11-26 01:10:56,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:10:56,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-26 01:10:56,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:56,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-26 01:10:56,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=2173, Unknown=21, NotChecked=194, Total=2652 [2022-11-26 01:10:56,297 INFO L87 Difference]: Start difference. First operand 153 states and 177 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:11:01,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:11:01,783 INFO L93 Difference]: Finished difference Result 231 states and 271 transitions. [2022-11-26 01:11:01,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-26 01:11:01,783 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-26 01:11:01,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:11:01,784 INFO L225 Difference]: With dead ends: 231 [2022-11-26 01:11:01,784 INFO L226 Difference]: Without dead ends: 231 [2022-11-26 01:11:01,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=578, Invalid=3567, Unknown=23, NotChecked=254, Total=4422 [2022-11-26 01:11:01,786 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 247 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:11:01,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 611 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1088 Invalid, 0 Unknown, 240 Unchecked, 2.1s Time] [2022-11-26 01:11:01,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-26 01:11:01,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 168. [2022-11-26 01:11:01,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 142 states have (on average 1.380281690140845) internal successors, (196), 167 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:11:01,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 196 transitions. [2022-11-26 01:11:01,790 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 196 transitions. Word has length 26 [2022-11-26 01:11:01,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:11:01,790 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 196 transitions. [2022-11-26 01:11:01,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:11:01,790 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 196 transitions. [2022-11-26 01:11:01,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-26 01:11:01,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:11:01,791 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:11:01,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 01:11:01,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-26 01:11:01,992 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 01:11:01,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:11:01,992 INFO L85 PathProgramCache]: Analyzing trace with hash 820310862, now seen corresponding path program 1 times [2022-11-26 01:11:01,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:11:01,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209748630] [2022-11-26 01:11:01,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:11:01,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:11:02,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:11:02,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:11:02,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:11:02,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209748630] [2022-11-26 01:11:02,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209748630] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:11:02,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021966862] [2022-11-26 01:11:02,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:11:02,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:11:02,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:11:02,631 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:11:02,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 01:11:02,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:11:02,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-26 01:11:02,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:11:03,171 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 01:11:03,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-26 01:11:03,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:03,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 01:11:03,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:03,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 01:11:03,463 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 01:11:03,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2022-11-26 01:11:03,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-26 01:11:03,577 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 01:11:03,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2022-11-26 01:11:03,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-26 01:11:03,738 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:11:03,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:11:03,924 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) (+ |c_ULTIMATE.start_main_~n~0#1.offset| 4)))) (and (forall ((v_ArrVal_983 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_983) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) 0)) (forall ((v_ArrVal_982 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_982) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) 0)))) is different from false [2022-11-26 01:11:03,942 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~n~0#1.offset| 4))) (and (forall ((v_ArrVal_980 (Array Int Int)) (v_ArrVal_982 (Array Int Int)) (v_ArrVal_981 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem21#1.base| v_ArrVal_980) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem21#1.base| v_ArrVal_981) |c_ULTIMATE.start_main_~n~0#1.base|) .cse0) v_ArrVal_982) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) 0)) (forall ((v_ArrVal_981 (Array Int Int)) (v_ArrVal_983 (Array Int Int))) (= (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem21#1.base| v_ArrVal_981))) (store .cse1 (select (select .cse1 |c_ULTIMATE.start_main_~n~0#1.base|) .cse0) v_ArrVal_983)) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) 0)))) is different from false [2022-11-26 01:11:03,961 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_main_~n~0#1.offset| 4))) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) .cse1))) (and (forall ((v_ArrVal_981 (Array Int Int)) (v_ArrVal_983 (Array Int Int))) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| .cse2 v_ArrVal_981))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~n~0#1.base|) .cse1) v_ArrVal_983)) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) 0)) (forall ((v_ArrVal_980 (Array Int Int)) (v_ArrVal_982 (Array Int Int)) (v_ArrVal_981 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| .cse2 v_ArrVal_980) (select (select (store |c_#memory_$Pointer$.base| .cse2 v_ArrVal_981) |c_ULTIMATE.start_main_~n~0#1.base|) .cse1) v_ArrVal_982) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) 0))))) is different from false [2022-11-26 01:11:04,659 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:11:04,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 108 treesize of output 112 [2022-11-26 01:11:04,686 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:11:04,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 98 treesize of output 109 [2022-11-26 01:11:04,758 INFO L321 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2022-11-26 01:11:04,759 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 299 treesize of output 217 [2022-11-26 01:11:04,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 171 [2022-11-26 01:11:04,800 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-26 01:11:04,801 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 238 treesize of output 226 [2022-11-26 01:11:04,813 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 221 treesize of output 205 [2022-11-26 01:11:04,822 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 205 treesize of output 199 [2022-11-26 01:11:04,844 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:11:04,845 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 199 treesize of output 192 [2022-11-26 01:11:04,854 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 181 treesize of output 177 [2022-11-26 01:11:04,864 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 177 treesize of output 175 [2022-11-26 01:11:04,906 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:11:04,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 182 treesize of output 200 [2022-11-26 01:11:05,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:11:05,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021966862] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:11:05,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [641878520] [2022-11-26 01:11:05,087 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-26 01:11:05,088 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:11:05,088 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:11:05,088 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:11:05,088 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:11:05,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:05,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:05,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 01:11:05,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:05,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-26 01:11:05,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:11:05,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:11:05,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:05,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-26 01:11:05,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:05,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 01:11:05,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:05,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 01:11:05,555 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 01:11:05,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-26 01:11:05,595 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:11:05,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-26 01:11:05,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-26 01:11:05,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-26 01:11:05,626 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 19 treesize of output 1 [2022-11-26 01:11:05,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:05,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 104 [2022-11-26 01:11:05,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 88 [2022-11-26 01:11:05,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 1 [2022-11-26 01:11:05,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:05,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:05,705 INFO L321 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2022-11-26 01:11:05,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 220 treesize of output 141 [2022-11-26 01:11:05,729 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-26 01:11:05,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 128 [2022-11-26 01:11:05,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 1 [2022-11-26 01:11:06,111 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:11:06,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-26 01:11:06,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 01:11:06,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-26 01:11:06,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-26 01:11:06,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-26 01:11:06,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:06,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 104 [2022-11-26 01:11:06,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 88 [2022-11-26 01:11:06,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 1 [2022-11-26 01:11:06,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:06,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:06,233 INFO L321 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2022-11-26 01:11:06,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 220 treesize of output 141 [2022-11-26 01:11:06,257 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-26 01:11:06,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 128 [2022-11-26 01:11:06,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 1 [2022-11-26 01:11:06,711 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:11:09,732 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9541#(and (= |ULTIMATE.start_main_~root~0#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_main_~n~0#1.base|) 1)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:11:09,732 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:11:09,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:11:09,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 13] total 29 [2022-11-26 01:11:09,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127307339] [2022-11-26 01:11:09,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:11:09,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-26 01:11:09,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:11:09,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-26 01:11:09,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1645, Unknown=34, NotChecked=258, Total=2162 [2022-11-26 01:11:09,735 INFO L87 Difference]: Start difference. First operand 168 states and 196 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:11:11,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:11:11,946 INFO L93 Difference]: Finished difference Result 215 states and 254 transitions. [2022-11-26 01:11:11,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-26 01:11:11,946 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-26 01:11:11,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:11:11,948 INFO L225 Difference]: With dead ends: 215 [2022-11-26 01:11:11,948 INFO L226 Difference]: Without dead ends: 215 [2022-11-26 01:11:11,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=421, Invalid=2632, Unknown=39, NotChecked=330, Total=3422 [2022-11-26 01:11:11,949 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 207 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 414 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:11:11,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 370 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 682 Invalid, 0 Unknown, 414 Unchecked, 1.2s Time] [2022-11-26 01:11:11,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-11-26 01:11:11,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 190. [2022-11-26 01:11:11,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 164 states have (on average 1.3658536585365855) internal successors, (224), 189 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:11:11,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 224 transitions. [2022-11-26 01:11:11,964 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 224 transitions. Word has length 26 [2022-11-26 01:11:11,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:11:11,964 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 224 transitions. [2022-11-26 01:11:11,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:11:11,965 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 224 transitions. [2022-11-26 01:11:11,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-26 01:11:11,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:11:11,965 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:11:11,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 01:11:12,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:11:12,172 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 01:11:12,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:11:12,172 INFO L85 PathProgramCache]: Analyzing trace with hash 908664036, now seen corresponding path program 1 times [2022-11-26 01:11:12,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:11:12,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398470088] [2022-11-26 01:11:12,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:11:12,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:11:12,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:11:13,001 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:11:13,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:11:13,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398470088] [2022-11-26 01:11:13,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398470088] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:11:13,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:11:13,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-26 01:11:13,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509478110] [2022-11-26 01:11:13,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:11:13,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 01:11:13,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:11:13,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 01:11:13,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-26 01:11:13,003 INFO L87 Difference]: Start difference. First operand 190 states and 224 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:11:14,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:11:14,050 INFO L93 Difference]: Finished difference Result 206 states and 242 transitions. [2022-11-26 01:11:14,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 01:11:14,050 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-26 01:11:14,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:11:14,051 INFO L225 Difference]: With dead ends: 206 [2022-11-26 01:11:14,052 INFO L226 Difference]: Without dead ends: 204 [2022-11-26 01:11:14,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2022-11-26 01:11:14,053 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 162 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:11:14,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 299 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 01:11:14,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-11-26 01:11:14,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 188. [2022-11-26 01:11:14,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 162 states have (on average 1.3641975308641976) internal successors, (221), 187 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:11:14,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 221 transitions. [2022-11-26 01:11:14,061 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 221 transitions. Word has length 31 [2022-11-26 01:11:14,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:11:14,061 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 221 transitions. [2022-11-26 01:11:14,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:11:14,062 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 221 transitions. [2022-11-26 01:11:14,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-26 01:11:14,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:11:14,062 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:11:14,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-26 01:11:14,063 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 01:11:14,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:11:14,063 INFO L85 PathProgramCache]: Analyzing trace with hash -479363963, now seen corresponding path program 1 times [2022-11-26 01:11:14,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:11:14,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626350670] [2022-11-26 01:11:14,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:11:14,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:11:14,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:11:14,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:11:14,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:11:14,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626350670] [2022-11-26 01:11:14,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626350670] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:11:14,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:11:14,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-26 01:11:14,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928901974] [2022-11-26 01:11:14,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:11:14,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-26 01:11:14,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:11:14,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-26 01:11:14,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-26 01:11:14,827 INFO L87 Difference]: Start difference. First operand 188 states and 221 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:11:15,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:11:15,725 INFO L93 Difference]: Finished difference Result 200 states and 234 transitions. [2022-11-26 01:11:15,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 01:11:15,726 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-26 01:11:15,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:11:15,727 INFO L225 Difference]: With dead ends: 200 [2022-11-26 01:11:15,727 INFO L226 Difference]: Without dead ends: 188 [2022-11-26 01:11:15,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-11-26 01:11:15,728 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 143 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:11:15,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 314 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 01:11:15,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-26 01:11:15,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 177. [2022-11-26 01:11:15,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 151 states have (on average 1.3841059602649006) internal successors, (209), 176 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:11:15,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 209 transitions. [2022-11-26 01:11:15,733 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 209 transitions. Word has length 31 [2022-11-26 01:11:15,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:11:15,733 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 209 transitions. [2022-11-26 01:11:15,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:11:15,733 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 209 transitions. [2022-11-26 01:11:15,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-26 01:11:15,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:11:15,734 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:11:15,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-26 01:11:15,734 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 01:11:15,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:11:15,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1347165479, now seen corresponding path program 1 times [2022-11-26 01:11:15,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:11:15,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651324707] [2022-11-26 01:11:15,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:11:15,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:11:15,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:11:16,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:11:16,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:11:16,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651324707] [2022-11-26 01:11:16,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651324707] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:11:16,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223683383] [2022-11-26 01:11:16,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:11:16,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:11:16,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:11:16,324 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:11:16,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 01:11:16,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:11:16,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-26 01:11:16,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:11:16,891 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:11:16,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-26 01:11:16,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 01:11:17,189 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 01:11:17,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-11-26 01:11:17,293 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 01:11:17,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-11-26 01:11:17,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:17,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-11-26 01:11:17,629 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:11:17,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:11:17,727 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1186 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) (+ |c_ULTIMATE.start_main_~n~0#1.offset| 4)) v_ArrVal_1186) |c_ULTIMATE.start_main_~root~0#1.base|) (+ |c_ULTIMATE.start_main_~root~0#1.offset| 4))) 1)) is different from false [2022-11-26 01:11:17,850 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1186 (Array Int Int)) (v_ArrVal_1185 (Array Int Int))) (= (select |c_#valid| (select (select (let ((.cse1 (+ |c_ULTIMATE.start_main_~n~0#1.offset| 4))) (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) .cse1) v_ArrVal_1185))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~n~0#1.base|) .cse1) v_ArrVal_1186))) |c_ULTIMATE.start_main_~root~0#1.base|) (+ |c_ULTIMATE.start_main_~root~0#1.offset| 4))) 1)) is different from false [2022-11-26 01:11:17,860 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:11:17,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 37 [2022-11-26 01:11:17,876 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:11:17,876 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 294 treesize of output 251 [2022-11-26 01:11:17,884 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 236 treesize of output 220 [2022-11-26 01:11:17,900 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:11:17,900 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 220 treesize of output 196 [2022-11-26 01:11:21,613 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:11:21,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 74 treesize of output 228 [2022-11-26 01:11:22,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:11:22,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223683383] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:11:22,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1482198648] [2022-11-26 01:11:22,880 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-26 01:11:22,880 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:11:22,881 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:11:22,881 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:11:22,881 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:11:22,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:22,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:22,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 01:11:22,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:11:22,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:11:22,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:22,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-26 01:11:22,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:22,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 01:11:22,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:22,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 01:11:22,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:22,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-26 01:11:23,303 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 01:11:23,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-26 01:11:23,344 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:11:23,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-26 01:11:23,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-26 01:11:23,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-26 01:11:23,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 01:11:23,422 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-26 01:11:23,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 92 [2022-11-26 01:11:23,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 74 [2022-11-26 01:11:23,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2022-11-26 01:11:23,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:23,486 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 01:11:23,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 168 treesize of output 117 [2022-11-26 01:11:23,510 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-26 01:11:23,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 96 [2022-11-26 01:11:23,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2022-11-26 01:11:23,612 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 01:11:23,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 32 [2022-11-26 01:11:23,680 INFO L321 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2022-11-26 01:11:23,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2022-11-26 01:11:23,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-26 01:11:23,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:23,736 INFO L321 Elim1Store]: treesize reduction 61, result has 10.3 percent of original size [2022-11-26 01:11:23,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 82 [2022-11-26 01:11:23,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 51 [2022-11-26 01:11:23,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:23,845 INFO L321 Elim1Store]: treesize reduction 88, result has 14.6 percent of original size [2022-11-26 01:11:23,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 273 treesize of output 173 [2022-11-26 01:11:23,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 126 [2022-11-26 01:11:23,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 1 [2022-11-26 01:11:23,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:23,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:23,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:24,004 INFO L321 Elim1Store]: treesize reduction 156, result has 13.3 percent of original size [2022-11-26 01:11:24,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 319 treesize of output 210 [2022-11-26 01:11:24,038 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-26 01:11:24,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 197 treesize of output 166 [2022-11-26 01:11:24,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 1 [2022-11-26 01:11:24,604 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 01:11:24,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-26 01:11:24,640 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:11:24,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-26 01:11:24,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 01:11:24,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-26 01:11:24,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-26 01:11:24,710 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-26 01:11:24,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 92 [2022-11-26 01:11:24,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 74 [2022-11-26 01:11:24,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2022-11-26 01:11:24,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:24,782 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 01:11:24,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 168 treesize of output 117 [2022-11-26 01:11:24,808 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-26 01:11:24,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 96 [2022-11-26 01:11:24,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 1 [2022-11-26 01:11:24,914 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 01:11:24,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 41 [2022-11-26 01:11:24,979 INFO L321 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2022-11-26 01:11:24,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2022-11-26 01:11:25,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-26 01:11:25,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:25,041 INFO L321 Elim1Store]: treesize reduction 61, result has 10.3 percent of original size [2022-11-26 01:11:25,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 82 [2022-11-26 01:11:25,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 51 [2022-11-26 01:11:25,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:25,145 INFO L321 Elim1Store]: treesize reduction 88, result has 14.6 percent of original size [2022-11-26 01:11:25,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 273 treesize of output 173 [2022-11-26 01:11:25,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 126 [2022-11-26 01:11:25,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 1 [2022-11-26 01:11:25,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:25,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:25,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:25,302 INFO L321 Elim1Store]: treesize reduction 156, result has 13.3 percent of original size [2022-11-26 01:11:25,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 319 treesize of output 210 [2022-11-26 01:11:25,335 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-26 01:11:25,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 197 treesize of output 166 [2022-11-26 01:11:25,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 1 [2022-11-26 01:11:25,713 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 01:11:25,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-26 01:11:25,758 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:11:25,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-26 01:11:25,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-26 01:11:25,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-26 01:11:25,803 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 1 [2022-11-26 01:11:25,850 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-26 01:11:25,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 92 [2022-11-26 01:11:25,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 74 [2022-11-26 01:11:25,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 1 [2022-11-26 01:11:25,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:25,923 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-26 01:11:25,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 176 treesize of output 125 [2022-11-26 01:11:25,946 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-26 01:11:25,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 110 [2022-11-26 01:11:25,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 1 [2022-11-26 01:11:26,025 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:11:30,396 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11032#(and (= |ULTIMATE.start_main_~root~0#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_main_~n~0#1.base|) 1)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:11:30,396 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:11:30,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:11:30,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 12] total 28 [2022-11-26 01:11:30,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950150297] [2022-11-26 01:11:30,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:11:30,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-26 01:11:30,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:11:30,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-26 01:11:30,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=2035, Unknown=15, NotChecked=190, Total=2550 [2022-11-26 01:11:30,399 INFO L87 Difference]: Start difference. First operand 177 states and 209 transitions. Second operand has 29 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:11:31,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:11:31,992 INFO L93 Difference]: Finished difference Result 274 states and 330 transitions. [2022-11-26 01:11:31,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 01:11:31,993 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-26 01:11:31,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:11:31,994 INFO L225 Difference]: With dead ends: 274 [2022-11-26 01:11:31,994 INFO L226 Difference]: Without dead ends: 274 [2022-11-26 01:11:31,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=446, Invalid=2626, Unknown=16, NotChecked=218, Total=3306 [2022-11-26 01:11:31,995 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 413 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 279 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:11:31,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 342 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 847 Invalid, 0 Unknown, 279 Unchecked, 1.2s Time] [2022-11-26 01:11:31,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-11-26 01:11:31,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 204. [2022-11-26 01:11:31,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 178 states have (on average 1.4325842696629214) internal successors, (255), 203 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:11:32,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 255 transitions. [2022-11-26 01:11:32,000 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 255 transitions. Word has length 31 [2022-11-26 01:11:32,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:11:32,001 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 255 transitions. [2022-11-26 01:11:32,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:11:32,001 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 255 transitions. [2022-11-26 01:11:32,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-26 01:11:32,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:11:32,002 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:11:32,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 01:11:32,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:11:32,207 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 01:11:32,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:11:32,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1347165478, now seen corresponding path program 1 times [2022-11-26 01:11:32,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:11:32,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893750216] [2022-11-26 01:11:32,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:11:32,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:11:32,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:11:34,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:11:34,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:11:34,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893750216] [2022-11-26 01:11:34,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893750216] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:11:34,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119429925] [2022-11-26 01:11:34,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:11:34,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:11:34,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:11:34,072 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:11:34,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 01:11:34,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:11:34,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-26 01:11:34,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:11:34,600 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 01:11:34,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-26 01:11:34,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:11:34,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 01:11:34,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 01:11:34,931 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 01:11:34,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-11-26 01:11:34,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-26 01:11:35,071 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 01:11:35,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-11-26 01:11:35,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-26 01:11:35,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:35,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-11-26 01:11:35,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:35,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-26 01:11:35,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:11:35,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:11:37,087 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:11:37,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 45 [2022-11-26 01:11:37,095 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:11:37,096 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-11-26 01:11:37,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-11-26 01:11:37,116 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:11:37,116 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 122 treesize of output 115 [2022-11-26 01:11:37,125 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 74 treesize of output 58 [2022-11-26 01:11:37,133 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 84 treesize of output 72 [2022-11-26 01:11:37,146 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 50 treesize of output 46 [2022-11-26 01:11:37,270 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:11:37,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 90 [2022-11-26 01:11:37,281 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:11:37,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 60 [2022-11-26 01:11:37,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:37,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:37,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:37,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:37,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 56 [2022-11-26 01:11:37,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:37,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:37,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:37,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 32 [2022-11-26 01:11:37,309 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 11 [2022-11-26 01:11:37,868 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:11:37,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 129 [2022-11-26 01:11:38,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:11:38,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119429925] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:11:38,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [800758501] [2022-11-26 01:11:38,444 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-26 01:11:38,444 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:11:38,444 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:11:38,445 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:11:38,445 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:11:38,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:38,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:38,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 01:11:38,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:11:38,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:38,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-26 01:11:38,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:11:38,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:38,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 01:11:38,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:38,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-26 01:11:38,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:38,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 01:11:38,848 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:11:38,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-26 01:11:38,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 01:11:38,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 01:11:38,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-26 01:11:38,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-26 01:11:38,927 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-26 01:11:38,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 92 [2022-11-26 01:11:38,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 74 [2022-11-26 01:11:38,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 1 [2022-11-26 01:11:38,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:39,006 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-26 01:11:39,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 176 treesize of output 125 [2022-11-26 01:11:39,030 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-26 01:11:39,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 110 [2022-11-26 01:11:39,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2022-11-26 01:11:39,121 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 01:11:39,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 32 [2022-11-26 01:11:39,178 INFO L321 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2022-11-26 01:11:39,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2022-11-26 01:11:39,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-26 01:11:39,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:39,240 INFO L321 Elim1Store]: treesize reduction 61, result has 10.3 percent of original size [2022-11-26 01:11:39,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 82 [2022-11-26 01:11:39,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 51 [2022-11-26 01:11:39,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:39,342 INFO L321 Elim1Store]: treesize reduction 88, result has 14.6 percent of original size [2022-11-26 01:11:39,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 273 treesize of output 173 [2022-11-26 01:11:39,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 126 [2022-11-26 01:11:39,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 1 [2022-11-26 01:11:39,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:39,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:39,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:39,466 INFO L321 Elim1Store]: treesize reduction 156, result has 13.3 percent of original size [2022-11-26 01:11:39,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 319 treesize of output 210 [2022-11-26 01:11:39,496 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-26 01:11:39,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 197 treesize of output 166 [2022-11-26 01:11:39,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 1 [2022-11-26 01:11:40,067 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:11:40,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-26 01:11:40,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 01:11:40,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-26 01:11:40,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 01:11:40,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-26 01:11:40,166 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-26 01:11:40,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 92 [2022-11-26 01:11:40,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 74 [2022-11-26 01:11:40,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2022-11-26 01:11:40,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:40,236 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 01:11:40,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 168 treesize of output 117 [2022-11-26 01:11:40,259 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-26 01:11:40,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 96 [2022-11-26 01:11:40,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 1 [2022-11-26 01:11:40,376 INFO L321 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2022-11-26 01:11:40,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2022-11-26 01:11:40,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 37 [2022-11-26 01:11:40,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:40,449 INFO L321 Elim1Store]: treesize reduction 61, result has 10.3 percent of original size [2022-11-26 01:11:40,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 82 [2022-11-26 01:11:40,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 51 [2022-11-26 01:11:40,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-26 01:11:40,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:40,571 INFO L321 Elim1Store]: treesize reduction 88, result has 14.6 percent of original size [2022-11-26 01:11:40,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 273 treesize of output 173 [2022-11-26 01:11:40,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 126 [2022-11-26 01:11:40,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 1 [2022-11-26 01:11:40,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:40,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:40,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:40,715 INFO L321 Elim1Store]: treesize reduction 150, result has 13.8 percent of original size [2022-11-26 01:11:40,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 307 treesize of output 198 [2022-11-26 01:11:40,746 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-26 01:11:40,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 150 [2022-11-26 01:11:40,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 1 [2022-11-26 01:11:41,053 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 01:11:41,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-26 01:11:41,087 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:11:41,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-26 01:11:41,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-26 01:11:41,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-26 01:11:41,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 01:11:41,159 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-26 01:11:41,159 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 92 [2022-11-26 01:11:41,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 74 [2022-11-26 01:11:41,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2022-11-26 01:11:41,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:41,221 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 01:11:41,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 168 treesize of output 117 [2022-11-26 01:11:41,249 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-26 01:11:41,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 96 [2022-11-26 01:11:41,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 1 [2022-11-26 01:11:41,339 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:11:46,949 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11776#(and (= |ULTIMATE.start_main_~root~0#1.offset| 0) (or (not (<= (+ |ULTIMATE.start_main_~n~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~n~0#1.base|))) (not (<= 0 |ULTIMATE.start_main_~n~0#1.offset|))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:11:46,949 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:11:46,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:11:46,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 13] total 43 [2022-11-26 01:11:46,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790820133] [2022-11-26 01:11:46,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:11:46,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-26 01:11:46,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:11:46,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-26 01:11:46,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=3901, Unknown=38, NotChecked=0, Total=4290 [2022-11-26 01:11:46,955 INFO L87 Difference]: Start difference. First operand 204 states and 255 transitions. Second operand has 44 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:06,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:06,457 INFO L93 Difference]: Finished difference Result 785 states and 986 transitions. [2022-11-26 01:12:06,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-11-26 01:12:06,458 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-26 01:12:06,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:06,463 INFO L225 Difference]: With dead ends: 785 [2022-11-26 01:12:06,463 INFO L226 Difference]: Without dead ends: 785 [2022-11-26 01:12:06,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9039 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=4090, Invalid=22600, Unknown=42, NotChecked=0, Total=26732 [2022-11-26 01:12:06,467 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 1407 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 3108 mSolverCounterSat, 403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1407 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 3511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 3108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:06,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1407 Valid, 1153 Invalid, 3511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 3108 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-11-26 01:12:06,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-11-26 01:12:06,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 405. [2022-11-26 01:12:06,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 383 states have (on average 1.433420365535248) internal successors, (549), 404 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:06,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 549 transitions. [2022-11-26 01:12:06,479 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 549 transitions. Word has length 31 [2022-11-26 01:12:06,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:06,479 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 549 transitions. [2022-11-26 01:12:06,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:06,480 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 549 transitions. [2022-11-26 01:12:06,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-26 01:12:06,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:06,481 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:06,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:06,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:06,681 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 01:12:06,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:06,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1347171400, now seen corresponding path program 1 times [2022-11-26 01:12:06,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:06,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027704298] [2022-11-26 01:12:06,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:06,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:06,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:07,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:07,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:12:07,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027704298] [2022-11-26 01:12:07,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027704298] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:12:07,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465040020] [2022-11-26 01:12:07,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:07,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:07,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:12:07,552 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:12:07,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6823005-89d7-4594-af73-b1ba42b8add8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 01:12:07,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:07,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-26 01:12:07,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:07,912 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:12:07,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-26 01:12:07,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:12:08,154 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 01:12:08,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2022-11-26 01:12:08,275 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 01:12:08,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2022-11-26 01:12:08,492 INFO L321 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2022-11-26 01:12:08,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2022-11-26 01:12:08,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:08,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 37 [2022-11-26 01:12:08,852 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 01:12:08,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 64 [2022-11-26 01:12:09,004 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 01:12:09,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 64 [2022-11-26 01:12:09,346 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 62 treesize of output 30 [2022-11-26 01:12:09,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:09,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:12:09,460 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1421 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem22#1.base| v_ArrVal_1421) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|)) 1)) is different from false [2022-11-26 01:12:09,592 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1421 (Array Int Int)) (v_ArrVal_1420 (Array Int Int))) (= (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem21#1.base| v_ArrVal_1420))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~n~0#1.base|) (+ |c_ULTIMATE.start_main_~n~0#1.offset| 4)) v_ArrVal_1421)) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|)) 1)) is different from false [2022-11-26 01:12:09,708 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1421 (Array Int Int)) (v_ArrVal_1420 (Array Int Int))) (= (select |c_#valid| (select (select (let ((.cse1 (+ |c_ULTIMATE.start_main_~n~0#1.offset| 4))) (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) .cse1 |c_ULTIMATE.start_main_#t~malloc20#1.base|)) |c_ULTIMATE.start_main_#t~malloc20#1.base| v_ArrVal_1420))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~n~0#1.base|) .cse1) v_ArrVal_1421))) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|)) 1)) is different from false [2022-11-26 01:12:10,310 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:12:10,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 203 treesize of output 131 [2022-11-26 01:12:10,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:10,498 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:12:10,502 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 1567998 treesize of output 1559818 [2022-11-26 01:12:15,823 WARN L233 SmtUtils]: Spent 5.32s on a formula simplification that was a NOOP. DAG size: 2013 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-26 01:12:15,908 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 1559674 treesize of output 1484922 [2022-11-26 01:12:20,964 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 1484922 treesize of output 1447546 [2022-11-26 01:12:26,096 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:12:26,099 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 1451772 treesize of output 1441406 [2022-11-26 01:12:49,897 WARN L233 SmtUtils]: Spent 23.79s on a formula simplification. DAG size of input: 2013 DAG size of output: 2011 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-26 01:12:50,071 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:12:50,075 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 1503860 treesize of output 1480578 [2022-11-26 01:14:54,369 WARN L233 SmtUtils]: Spent 2.07m on a formula simplification. DAG size of input: 2016 DAG size of output: 2014 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-26 01:15:32,097 WARN L233 SmtUtils]: Spent 22.20s on a formula simplification. DAG size of input: 1979 DAG size of output: 1979 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-26 01:15:58,625 WARN L233 SmtUtils]: Spent 9.21s on a formula simplification. DAG size of input: 1406 DAG size of output: 1406 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)