./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0234-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0234-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8 --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 3248e88e6fd49fdcf0a9f78f1aa9e69276951d353f75f39f6bb30d51b2e53989 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:25:31,331 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:25:31,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:25:31,364 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:25:31,365 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:25:31,366 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:25:31,368 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:25:31,370 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:25:31,373 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:25:31,374 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:25:31,375 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:25:31,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:25:31,377 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:25:31,379 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:25:31,381 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:25:31,382 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:25:31,383 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:25:31,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:25:31,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:25:31,390 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:25:31,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:25:31,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:25:31,395 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:25:31,396 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:25:31,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:25:31,401 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:25:31,402 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:25:31,403 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:25:31,403 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:25:31,405 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:25:31,405 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:25:31,406 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:25:31,407 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:25:31,408 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:25:31,409 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:25:31,410 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:25:31,411 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:25:31,411 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:25:31,411 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:25:31,412 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:25:31,413 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:25:31,414 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-07 01:25:31,441 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:25:31,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:25:31,442 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:25:31,443 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:25:31,443 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:25:31,443 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:25:31,443 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:25:31,444 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:25:31,444 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:25:31,444 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:25:31,444 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:25:31,445 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:25:31,445 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:25:31,445 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:25:31,445 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:25:31,446 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 01:25:31,446 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 01:25:31,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:25:31,447 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:25:31,447 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 01:25:31,447 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:25:31,448 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:25:31,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:25:31,448 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 01:25:31,448 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 01:25:31,449 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 01:25:31,449 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:25:31,449 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:25:31,449 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:25:31,450 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:25:31,450 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:25:31,450 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:25:31,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:25:31,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:25:31,451 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:25:31,451 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:25:31,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:25:31,452 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:25:31,452 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:25:31,452 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3248e88e6fd49fdcf0a9f78f1aa9e69276951d353f75f39f6bb30d51b2e53989 [2021-11-07 01:25:31,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:25:31,751 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:25:31,754 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:25:31,756 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:25:31,756 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:25:31,757 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/memsafety/test-0234-2.i [2021-11-07 01:25:31,824 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/data/301e82820/0e15ab7bb683484a9e0d303a3c9030ba/FLAGfffd1ee25 [2021-11-07 01:25:32,576 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:25:32,577 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/sv-benchmarks/c/memsafety/test-0234-2.i [2021-11-07 01:25:32,595 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/data/301e82820/0e15ab7bb683484a9e0d303a3c9030ba/FLAGfffd1ee25 [2021-11-07 01:25:32,774 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/data/301e82820/0e15ab7bb683484a9e0d303a3c9030ba [2021-11-07 01:25:32,777 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:25:32,778 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:25:32,782 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:25:32,782 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:25:32,786 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:25:32,786 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:32" (1/1) ... [2021-11-07 01:25:32,788 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@187fff41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:32, skipping insertion in model container [2021-11-07 01:25:32,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:32" (1/1) ... [2021-11-07 01:25:32,795 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:25:32,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:25:33,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:25:33,338 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:25:33,402 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:25:33,460 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:25:33,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:33 WrapperNode [2021-11-07 01:25:33,461 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:25:33,462 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:25:33,462 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:25:33,462 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:25:33,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:33" (1/1) ... [2021-11-07 01:25:33,490 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:33" (1/1) ... [2021-11-07 01:25:33,533 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:25:33,534 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:25:33,534 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:25:33,534 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:25:33,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:33" (1/1) ... [2021-11-07 01:25:33,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:33" (1/1) ... [2021-11-07 01:25:33,550 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:33" (1/1) ... [2021-11-07 01:25:33,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:33" (1/1) ... [2021-11-07 01:25:33,567 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:33" (1/1) ... [2021-11-07 01:25:33,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:33" (1/1) ... [2021-11-07 01:25:33,577 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:33" (1/1) ... [2021-11-07 01:25:33,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:25:33,584 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:25:33,584 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:25:33,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:25:33,603 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:33" (1/1) ... [2021-11-07 01:25:33,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:25:33,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:25:33,635 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:25:33,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:25:33,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:25:33,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:25:33,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:25:33,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:25:33,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:25:33,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 01:25:33,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:25:33,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:25:33,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:25:34,922 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:25:34,923 INFO L299 CfgBuilder]: Removed 70 assume(true) statements. [2021-11-07 01:25:34,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:25:34 BoogieIcfgContainer [2021-11-07 01:25:34,926 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:25:34,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:25:34,928 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:25:34,932 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:25:34,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:25:32" (1/3) ... [2021-11-07 01:25:34,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11d94455 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:25:34, skipping insertion in model container [2021-11-07 01:25:34,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:33" (2/3) ... [2021-11-07 01:25:34,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11d94455 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:25:34, skipping insertion in model container [2021-11-07 01:25:34,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:25:34" (3/3) ... [2021-11-07 01:25:34,936 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0234-2.i [2021-11-07 01:25:34,942 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:25:34,943 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 80 error locations. [2021-11-07 01:25:34,996 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:25:35,003 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:25:35,004 INFO L340 AbstractCegarLoop]: Starting to check reachability of 80 error locations. [2021-11-07 01:25:35,024 INFO L276 IsEmpty]: Start isEmpty. Operand has 162 states, 81 states have (on average 2.308641975308642) internal successors, (187), 161 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:35,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-07 01:25:35,030 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:35,031 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-07 01:25:35,031 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2021-11-07 01:25:35,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:35,044 INFO L85 PathProgramCache]: Analyzing trace with hash 425269, now seen corresponding path program 1 times [2021-11-07 01:25:35,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:25:35,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868456886] [2021-11-07 01:25:35,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:35,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:25:35,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:35,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:35,206 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:25:35,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868456886] [2021-11-07 01:25:35,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868456886] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:35,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:35,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 01:25:35,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324948490] [2021-11-07 01:25:35,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:25:35,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:25:35,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:25:35,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:25:35,243 INFO L87 Difference]: Start difference. First operand has 162 states, 81 states have (on average 2.308641975308642) internal successors, (187), 161 states have internal predecessors, (187), 0 states have call successors, (0), 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 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:35,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:35,280 INFO L93 Difference]: Finished difference Result 162 states and 177 transitions. [2021-11-07 01:25:35,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:25:35,282 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-07 01:25:35,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:35,301 INFO L225 Difference]: With dead ends: 162 [2021-11-07 01:25:35,301 INFO L226 Difference]: Without dead ends: 161 [2021-11-07 01:25:35,304 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:25:35,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-07 01:25:35,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2021-11-07 01:25:35,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 81 states have (on average 2.1728395061728394) internal successors, (176), 160 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:35,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 176 transitions. [2021-11-07 01:25:35,381 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 176 transitions. Word has length 3 [2021-11-07 01:25:35,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:35,381 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 176 transitions. [2021-11-07 01:25:35,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:35,382 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 176 transitions. [2021-11-07 01:25:35,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-07 01:25:35,382 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:35,382 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-07 01:25:35,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:25:35,383 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2021-11-07 01:25:35,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:35,384 INFO L85 PathProgramCache]: Analyzing trace with hash 417267, now seen corresponding path program 1 times [2021-11-07 01:25:35,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:25:35,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89794292] [2021-11-07 01:25:35,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:35,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:25:35,405 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:25:35,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999465015] [2021-11-07 01:25:35,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:35,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:25:35,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:25:35,419 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:25:35,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 01:25:35,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:35,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:25:35,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:35,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:25:35,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:35,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:35,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:35,631 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:25:35,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89794292] [2021-11-07 01:25:35,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:25:35,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999465015] [2021-11-07 01:25:35,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999465015] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:35,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:35,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:25:35,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425141143] [2021-11-07 01:25:35,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:25:35,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:25:35,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:25:35,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:35,637 INFO L87 Difference]: Start difference. First operand 161 states and 176 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:35,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:35,881 INFO L93 Difference]: Finished difference Result 177 states and 192 transitions. [2021-11-07 01:25:35,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:25:35,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-07 01:25:35,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:35,887 INFO L225 Difference]: With dead ends: 177 [2021-11-07 01:25:35,888 INFO L226 Difference]: Without dead ends: 177 [2021-11-07 01:25:35,890 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:35,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-07 01:25:35,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 155. [2021-11-07 01:25:35,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 154 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:35,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 170 transitions. [2021-11-07 01:25:35,917 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 170 transitions. Word has length 3 [2021-11-07 01:25:35,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:35,918 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 170 transitions. [2021-11-07 01:25:35,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:35,919 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 170 transitions. [2021-11-07 01:25:35,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-07 01:25:35,924 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:35,924 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-07 01:25:35,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:36,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:25:36,151 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2021-11-07 01:25:36,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:36,152 INFO L85 PathProgramCache]: Analyzing trace with hash 12935317, now seen corresponding path program 1 times [2021-11-07 01:25:36,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:25:36,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455196375] [2021-11-07 01:25:36,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:36,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:25:36,164 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:25:36,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1373681946] [2021-11-07 01:25:36,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:36,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:25:36,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:25:36,166 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:25:36,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 01:25:36,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:36,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:25:36,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:36,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-11-07 01:25:36,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:36,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:36,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:36,482 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:25:36,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455196375] [2021-11-07 01:25:36,482 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:25:36,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373681946] [2021-11-07 01:25:36,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373681946] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:36,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:36,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:25:36,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812346353] [2021-11-07 01:25:36,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:25:36,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:25:36,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:25:36,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:25:36,486 INFO L87 Difference]: Start difference. First operand 155 states and 170 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:36,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:36,716 INFO L93 Difference]: Finished difference Result 150 states and 165 transitions. [2021-11-07 01:25:36,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:25:36,717 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-07 01:25:36,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:36,718 INFO L225 Difference]: With dead ends: 150 [2021-11-07 01:25:36,719 INFO L226 Difference]: Without dead ends: 150 [2021-11-07 01:25:36,719 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:25:36,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-07 01:25:36,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2021-11-07 01:25:36,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 81 states have (on average 2.0246913580246915) internal successors, (164), 148 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) [2021-11-07 01:25:36,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 164 transitions. [2021-11-07 01:25:36,729 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 164 transitions. Word has length 4 [2021-11-07 01:25:36,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:36,729 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 164 transitions. [2021-11-07 01:25:36,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:36,730 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 164 transitions. [2021-11-07 01:25:36,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 01:25:36,731 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:36,731 INFO L513 BasicCegarLoop]: 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] [2021-11-07 01:25:36,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-07 01:25:36,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:25:36,959 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2021-11-07 01:25:36,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:36,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1975982565, now seen corresponding path program 1 times [2021-11-07 01:25:36,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:25:36,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854806979] [2021-11-07 01:25:36,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:36,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:25:36,991 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:25:36,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1528480972] [2021-11-07 01:25:36,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:36,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:25:36,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:25:36,999 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:25:37,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 01:25:37,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:37,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:25:37,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:37,283 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-07 01:25:37,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-07 01:25:37,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:37,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:37,505 INFO L354 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2021-11-07 01:25:37,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 26 [2021-11-07 01:25:37,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:37,549 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:25:37,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854806979] [2021-11-07 01:25:37,549 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:25:37,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528480972] [2021-11-07 01:25:37,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528480972] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:37,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:37,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:25:37,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036875955] [2021-11-07 01:25:37,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:25:37,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:25:37,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:25:37,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:25:37,553 INFO L87 Difference]: Start difference. First operand 149 states and 164 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:37,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:37,945 INFO L93 Difference]: Finished difference Result 185 states and 204 transitions. [2021-11-07 01:25:37,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:25:37,946 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-07 01:25:37,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:37,947 INFO L225 Difference]: With dead ends: 185 [2021-11-07 01:25:37,948 INFO L226 Difference]: Without dead ends: 185 [2021-11-07 01:25:37,948 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:25:37,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-07 01:25:37,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 147. [2021-11-07 01:25:37,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 81 states have (on average 2.0) internal successors, (162), 146 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:37,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 162 transitions. [2021-11-07 01:25:37,956 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 162 transitions. Word has length 25 [2021-11-07 01:25:37,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:37,956 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 162 transitions. [2021-11-07 01:25:37,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:37,957 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 162 transitions. [2021-11-07 01:25:37,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 01:25:37,958 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:37,958 INFO L513 BasicCegarLoop]: 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] [2021-11-07 01:25:37,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:38,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-07 01:25:38,183 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2021-11-07 01:25:38,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:38,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1975982566, now seen corresponding path program 1 times [2021-11-07 01:25:38,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:25:38,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540860002] [2021-11-07 01:25:38,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:38,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:25:38,205 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:25:38,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [55266014] [2021-11-07 01:25:38,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:38,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:25:38,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:25:38,210 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:25:38,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 01:25:38,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:38,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-07 01:25:38,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:38,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2021-11-07 01:25:38,687 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-07 01:25:38,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2021-11-07 01:25:38,698 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:25:38,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-07 01:25:41,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:41,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:41,332 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-07 01:25:41,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 31 treesize of output 30 [2021-11-07 01:25:41,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:41,481 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:25:41,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540860002] [2021-11-07 01:25:41,482 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:25:41,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55266014] [2021-11-07 01:25:41,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55266014] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:41,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:41,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 01:25:41,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818200692] [2021-11-07 01:25:41,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:25:41,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:25:41,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:25:41,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:25:41,487 INFO L87 Difference]: Start difference. First operand 147 states and 162 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:56,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:56,191 INFO L93 Difference]: Finished difference Result 185 states and 204 transitions. [2021-11-07 01:25:56,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:25:56,191 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-07 01:25:56,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:56,193 INFO L225 Difference]: With dead ends: 185 [2021-11-07 01:25:56,193 INFO L226 Difference]: Without dead ends: 185 [2021-11-07 01:25:56,193 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:25:56,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-07 01:25:56,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2021-11-07 01:25:56,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 81 states have (on average 1.9753086419753085) internal successors, (160), 144 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:56,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 160 transitions. [2021-11-07 01:25:56,198 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 160 transitions. Word has length 25 [2021-11-07 01:25:56,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:56,199 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 160 transitions. [2021-11-07 01:25:56,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:56,199 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 160 transitions. [2021-11-07 01:25:56,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 01:25:56,200 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:56,200 INFO L513 BasicCegarLoop]: 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] [2021-11-07 01:25:56,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:56,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:25:56,401 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2021-11-07 01:25:56,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:56,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1125925864, now seen corresponding path program 1 times [2021-11-07 01:25:56,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:25:56,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009647995] [2021-11-07 01:25:56,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:56,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:25:56,421 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:25:56,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135836995] [2021-11-07 01:25:56,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:56,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:25:56,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:25:56,447 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:25:56,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 01:25:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:56,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 01:25:56,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:56,743 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 01:25:56,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-07 01:25:56,823 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 01:25:56,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-07 01:25:56,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:56,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:56,972 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-07 01:25:56,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2021-11-07 01:25:57,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:57,004 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:25:57,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009647995] [2021-11-07 01:25:57,004 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:25:57,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135836995] [2021-11-07 01:25:57,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135836995] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:57,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:57,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-07 01:25:57,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702679587] [2021-11-07 01:25:57,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:25:57,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:25:57,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:25:57,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:25:57,007 INFO L87 Difference]: Start difference. First operand 145 states and 160 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:57,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:57,447 INFO L93 Difference]: Finished difference Result 180 states and 199 transitions. [2021-11-07 01:25:57,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:25:57,448 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 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 [2021-11-07 01:25:57,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:57,449 INFO L225 Difference]: With dead ends: 180 [2021-11-07 01:25:57,449 INFO L226 Difference]: Without dead ends: 180 [2021-11-07 01:25:57,450 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:25:57,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-07 01:25:57,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 142. [2021-11-07 01:25:57,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 81 states have (on average 1.9382716049382716) internal successors, (157), 141 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) [2021-11-07 01:25:57,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 157 transitions. [2021-11-07 01:25:57,458 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 157 transitions. Word has length 26 [2021-11-07 01:25:57,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:57,459 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 157 transitions. [2021-11-07 01:25:57,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:57,459 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 157 transitions. [2021-11-07 01:25:57,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 01:25:57,460 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:57,460 INFO L513 BasicCegarLoop]: 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] [2021-11-07 01:25:57,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:57,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:25:57,661 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2021-11-07 01:25:57,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:57,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1125925865, now seen corresponding path program 1 times [2021-11-07 01:25:57,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:25:57,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235379079] [2021-11-07 01:25:57,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:57,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:25:57,675 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:25:57,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113372026] [2021-11-07 01:25:57,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:57,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:25:57,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:25:57,677 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:25:57,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 01:25:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:57,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-07 01:25:57,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:57,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2021-11-07 01:25:58,311 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-07 01:25:58,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2021-11-07 01:25:58,403 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-07 01:25:58,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-07 01:25:58,713 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-07 01:25:58,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 50 [2021-11-07 01:25:58,741 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-07 01:25:58,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 50 treesize of output 52 [2021-11-07 01:26:05,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:26:05,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:06,094 INFO L354 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2021-11-07 01:26:06,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 43 treesize of output 43 [2021-11-07 01:26:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:26:10,335 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:26:10,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235379079] [2021-11-07 01:26:10,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:26:10,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113372026] [2021-11-07 01:26:10,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113372026] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:10,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:10,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-11-07 01:26:10,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784759351] [2021-11-07 01:26:10,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 01:26:10,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:26:10,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 01:26:10,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=152, Unknown=3, NotChecked=0, Total=182 [2021-11-07 01:26:10,340 INFO L87 Difference]: Start difference. First operand 142 states and 157 transitions. Second operand has 14 states, 13 states have (on average 3.0) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:22,623 WARN L207 SmtUtils]: Spent 6.46 s on a formula simplification. DAG size of input: 114 DAG size of output: 100 [2021-11-07 01:26:37,590 WARN L207 SmtUtils]: Spent 14.25 s on a formula simplification. DAG size of input: 115 DAG size of output: 86 [2021-11-07 01:27:00,531 WARN L207 SmtUtils]: Spent 10.04 s on a formula simplification. DAG size of input: 108 DAG size of output: 86 [2021-11-07 01:27:12,573 WARN L207 SmtUtils]: Spent 7.17 s on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2021-11-07 01:27:23,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:23,016 INFO L93 Difference]: Finished difference Result 178 states and 197 transitions. [2021-11-07 01:27:23,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:27:23,017 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-07 01:27:23,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:23,019 INFO L225 Difference]: With dead ends: 178 [2021-11-07 01:27:23,019 INFO L226 Difference]: Without dead ends: 178 [2021-11-07 01:27:23,020 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 56.4s TimeCoverageRelationStatistics Valid=116, Invalid=300, Unknown=4, NotChecked=0, Total=420 [2021-11-07 01:27:23,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-07 01:27:23,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 140. [2021-11-07 01:27:23,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 81 states have (on average 1.9135802469135803) internal successors, (155), 139 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) [2021-11-07 01:27:23,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 155 transitions. [2021-11-07 01:27:23,025 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 155 transitions. Word has length 26 [2021-11-07 01:27:23,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:23,026 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 155 transitions. [2021-11-07 01:27:23,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:23,026 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 155 transitions. [2021-11-07 01:27:23,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 01:27:23,028 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:23,028 INFO L513 BasicCegarLoop]: 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, 1, 1, 1, 1] [2021-11-07 01:27:23,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:23,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:27:23,239 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2021-11-07 01:27:23,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:23,240 INFO L85 PathProgramCache]: Analyzing trace with hash 314523639, now seen corresponding path program 1 times [2021-11-07 01:27:23,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:27:23,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662796513] [2021-11-07 01:27:23,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:23,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:27:23,279 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:27:23,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [834495482] [2021-11-07 01:27:23,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:23,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:27:23,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:27:23,284 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:27:23,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 01:27:23,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:23,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-07 01:27:23,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:23,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-07 01:27:23,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2021-11-07 01:27:23,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:27:24,079 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-07 01:27:24,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-07 01:27:24,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2021-11-07 01:27:24,599 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-07 01:27:24,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 37 [2021-11-07 01:27:24,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2021-11-07 01:27:25,086 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-07 01:27:25,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 63 [2021-11-07 01:27:25,135 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-07 01:27:25,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2021-11-07 01:27:27,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:27,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:29,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:29,778 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:27:29,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662796513] [2021-11-07 01:27:29,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:27:29,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834495482] [2021-11-07 01:27:29,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834495482] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:29,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:29,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 6] imperfect sequences [] total 13 [2021-11-07 01:27:29,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874631275] [2021-11-07 01:27:29,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 01:27:29,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:27:29,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 01:27:29,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:27:29,781 INFO L87 Difference]: Start difference. First operand 140 states and 155 transitions. Second operand has 14 states, 13 states have (on average 4.076923076923077) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:22,439 WARN L207 SmtUtils]: Spent 6.36 s on a formula simplification. DAG size of input: 127 DAG size of output: 108 [2021-11-07 01:30:05,953 WARN L207 SmtUtils]: Spent 5.10 s on a formula simplification that was a NOOP. DAG size: 126 [2021-11-07 01:30:58,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:58,396 INFO L93 Difference]: Finished difference Result 197 states and 221 transitions. [2021-11-07 01:30:58,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 01:30:58,397 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.076923076923077) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-07 01:30:58,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:58,398 INFO L225 Difference]: With dead ends: 197 [2021-11-07 01:30:58,398 INFO L226 Difference]: Without dead ends: 197 [2021-11-07 01:30:58,398 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 71.2s TimeCoverageRelationStatistics Valid=245, Invalid=553, Unknown=14, NotChecked=0, Total=812 [2021-11-07 01:30:58,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-07 01:30:58,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 135. [2021-11-07 01:30:58,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 81 states have (on average 1.8518518518518519) internal successors, (150), 134 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:58,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 150 transitions. [2021-11-07 01:30:58,402 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 150 transitions. Word has length 30 [2021-11-07 01:30:58,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:58,403 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 150 transitions. [2021-11-07 01:30:58,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.076923076923077) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:58,403 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 150 transitions. [2021-11-07 01:30:58,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 01:30:58,404 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:58,404 INFO L513 BasicCegarLoop]: 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, 1, 1, 1, 1, 1] [2021-11-07 01:30:58,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-07 01:30:58,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:30:58,619 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2021-11-07 01:30:58,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:58,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1160298334, now seen corresponding path program 1 times [2021-11-07 01:30:58,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:30:58,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407289974] [2021-11-07 01:30:58,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:58,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:30:58,634 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:30:58,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1454419561] [2021-11-07 01:30:58,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:58,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:30:58,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:30:58,635 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:30:58,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 01:30:59,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:59,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-07 01:30:59,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:59,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2021-11-07 01:30:59,720 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-07 01:30:59,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-07 01:30:59,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 7 [2021-11-07 01:30:59,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-07 01:30:59,967 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-07 01:30:59,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 29 [2021-11-07 01:31:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:00,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:05,646 INFO L354 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2021-11-07 01:31:05,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 62 treesize of output 62 [2021-11-07 01:31:06,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:06,500 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:31:06,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407289974] [2021-11-07 01:31:06,501 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:31:06,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454419561] [2021-11-07 01:31:06,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454419561] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:06,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:06,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 15 [2021-11-07 01:31:06,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068280503] [2021-11-07 01:31:06,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:31:06,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:31:06,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:31:06,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:31:06,504 INFO L87 Difference]: Start difference. First operand 135 states and 150 transitions. Second operand has 16 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:33,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:33,246 INFO L93 Difference]: Finished difference Result 421 states and 488 transitions. [2021-11-07 01:31:33,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 01:31:33,247 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 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 [2021-11-07 01:31:33,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:33,250 INFO L225 Difference]: With dead ends: 421 [2021-11-07 01:31:33,250 INFO L226 Difference]: Without dead ends: 421 [2021-11-07 01:31:33,251 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=404, Invalid=1002, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 01:31:33,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-11-07 01:31:33,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 134. [2021-11-07 01:31:33,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 81 states have (on average 1.8395061728395061) internal successors, (149), 133 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:33,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 149 transitions. [2021-11-07 01:31:33,258 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 149 transitions. Word has length 31 [2021-11-07 01:31:33,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:33,259 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 149 transitions. [2021-11-07 01:31:33,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:33,259 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 149 transitions. [2021-11-07 01:31:33,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 01:31:33,260 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:33,260 INFO L513 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:33,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:33,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-07 01:31:33,467 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2021-11-07 01:31:33,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:33,468 INFO L85 PathProgramCache]: Analyzing trace with hash 558136396, now seen corresponding path program 1 times [2021-11-07 01:31:33,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:31:33,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847489969] [2021-11-07 01:31:33,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:33,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:31:33,480 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:31:33,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [278739713] [2021-11-07 01:31:33,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:33,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:31:33,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:31:33,482 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:31:33,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 01:31:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:33,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-07 01:31:33,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:33,955 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-07 01:31:33,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-07 01:31:34,079 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-07 01:31:34,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 37 [2021-11-07 01:31:36,377 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-07 01:31:36,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 42 [2021-11-07 01:31:36,664 INFO L354 Elim1Store]: treesize reduction 104, result has 16.8 percent of original size [2021-11-07 01:31:36,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 39 treesize of output 50 [2021-11-07 01:31:43,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:43,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:44,359 INFO L354 Elim1Store]: treesize reduction 39, result has 20.4 percent of original size [2021-11-07 01:31:44,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 45 [2021-11-07 01:31:44,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:44,379 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:31:44,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847489969] [2021-11-07 01:31:44,380 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:31:44,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278739713] [2021-11-07 01:31:44,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278739713] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:44,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:44,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 9] imperfect sequences [] total 18 [2021-11-07 01:31:44,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996164865] [2021-11-07 01:31:44,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 01:31:44,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:31:44,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 01:31:44,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=251, Unknown=1, NotChecked=0, Total=342 [2021-11-07 01:31:44,382 INFO L87 Difference]: Start difference. First operand 134 states and 149 transitions. Second operand has 19 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 19 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) [2021-11-07 01:32:01,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:01,796 INFO L93 Difference]: Finished difference Result 169 states and 188 transitions. [2021-11-07 01:32:01,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:32:01,797 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 19 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 34 [2021-11-07 01:32:01,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:01,798 INFO L225 Difference]: With dead ends: 169 [2021-11-07 01:32:01,798 INFO L226 Difference]: Without dead ends: 169 [2021-11-07 01:32:01,799 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=221, Invalid=478, Unknown=3, NotChecked=0, Total=702 [2021-11-07 01:32:01,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-07 01:32:01,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 131. [2021-11-07 01:32:01,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 81 states have (on average 1.8024691358024691) internal successors, (146), 130 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:01,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 146 transitions. [2021-11-07 01:32:01,804 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 146 transitions. Word has length 34 [2021-11-07 01:32:01,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:01,805 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 146 transitions. [2021-11-07 01:32:01,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 19 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) [2021-11-07 01:32:01,805 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 146 transitions. [2021-11-07 01:32:01,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 01:32:01,806 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:01,807 INFO L513 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:32:01,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:02,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-07 01:32:02,023 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2021-11-07 01:32:02,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:02,024 INFO L85 PathProgramCache]: Analyzing trace with hash 558136397, now seen corresponding path program 1 times [2021-11-07 01:32:02,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:32:02,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103053859] [2021-11-07 01:32:02,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:02,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:32:02,036 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:32:02,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1788941543] [2021-11-07 01:32:02,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:02,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:32:02,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:32:02,048 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:32:02,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 01:32:02,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:02,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-07 01:32:02,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:02,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:32:02,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2021-11-07 01:32:03,013 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-07 01:32:03,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 47 [2021-11-07 01:32:03,056 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-07 01:32:03,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 47 treesize of output 51 [2021-11-07 01:32:03,560 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-11-07 01:32:03,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 65 treesize of output 66 [2021-11-07 01:32:03,625 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-07 01:32:03,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 66 treesize of output 77 [2021-11-07 01:32:04,460 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-11-07 01:32:04,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 78 treesize of output 79 [2021-11-07 01:32:04,579 INFO L354 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2021-11-07 01:32:04,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 79 treesize of output 97 [2021-11-07 01:32:05,499 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-11-07 01:32:05,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 89 treesize of output 90 [2021-11-07 01:32:05,574 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-07 01:32:05,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 90 treesize of output 96 [2021-11-07 01:32:19,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:32:19,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:33,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:32:33,598 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:32:33,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103053859] [2021-11-07 01:32:33,598 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:32:33,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788941543] [2021-11-07 01:32:33,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788941543] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:33,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:33,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 9] imperfect sequences [] total 18 [2021-11-07 01:32:33,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525668686] [2021-11-07 01:32:33,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 01:32:33,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:32:33,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 01:32:33,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=287, Unknown=8, NotChecked=0, Total=342 [2021-11-07 01:32:33,601 INFO L87 Difference]: Start difference. First operand 131 states and 146 transitions. Second operand has 19 states, 18 states have (on average 3.5) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:41,671 WARN L207 SmtUtils]: Spent 5.92 s on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-11-07 01:33:02,672 WARN L207 SmtUtils]: Spent 18.43 s on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2021-11-07 01:33:28,124 WARN L207 SmtUtils]: Spent 16.70 s on a formula simplification. DAG size of input: 138 DAG size of output: 134 [2021-11-07 01:34:05,420 WARN L207 SmtUtils]: Spent 24.72 s on a formula simplification. DAG size of input: 152 DAG size of output: 137 [2021-11-07 01:34:17,272 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-07 01:34:17,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:34:17,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2021-11-07 01:34:17,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-07 01:34:17,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:34:17,474 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:256) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.UndoableWrapperScript.pop(UndoableWrapperScript.java:59) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:67) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:621) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:650) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:180) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:174) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:140) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:869) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:783) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:237) ... 58 more [2021-11-07 01:34:17,478 INFO L168 Benchmark]: Toolchain (without parser) took 524699.44 ms. Allocated memory was 90.2 MB in the beginning and 144.7 MB in the end (delta: 54.5 MB). Free memory was 52.3 MB in the beginning and 34.9 MB in the end (delta: 17.4 MB). Peak memory consumption was 71.8 MB. Max. memory is 16.1 GB. [2021-11-07 01:34:17,478 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 90.2 MB. Free memory is still 70.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:34:17,478 INFO L168 Benchmark]: CACSL2BoogieTranslator took 679.09 ms. Allocated memory was 90.2 MB in the beginning and 111.1 MB in the end (delta: 21.0 MB). Free memory was 52.1 MB in the beginning and 74.7 MB in the end (delta: -22.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:34:17,479 INFO L168 Benchmark]: Boogie Procedure Inliner took 71.77 ms. Allocated memory is still 111.1 MB. Free memory was 74.7 MB in the beginning and 71.6 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-11-07 01:34:17,479 INFO L168 Benchmark]: Boogie Preprocessor took 49.24 ms. Allocated memory is still 111.1 MB. Free memory was 71.1 MB in the beginning and 68.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:34:17,479 INFO L168 Benchmark]: RCFGBuilder took 1342.24 ms. Allocated memory is still 111.1 MB. Free memory was 68.6 MB in the beginning and 61.6 MB in the end (delta: 7.0 MB). Peak memory consumption was 29.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:34:17,480 INFO L168 Benchmark]: TraceAbstraction took 522548.98 ms. Allocated memory was 111.1 MB in the beginning and 144.7 MB in the end (delta: 33.6 MB). Free memory was 60.7 MB in the beginning and 34.9 MB in the end (delta: 25.8 MB). Peak memory consumption was 59.2 MB. Max. memory is 16.1 GB. [2021-11-07 01:34:17,482 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 90.2 MB. Free memory is still 70.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 679.09 ms. Allocated memory was 90.2 MB in the beginning and 111.1 MB in the end (delta: 21.0 MB). Free memory was 52.1 MB in the beginning and 74.7 MB in the end (delta: -22.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 71.77 ms. Allocated memory is still 111.1 MB. Free memory was 74.7 MB in the beginning and 71.6 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 49.24 ms. Allocated memory is still 111.1 MB. Free memory was 71.1 MB in the beginning and 68.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1342.24 ms. Allocated memory is still 111.1 MB. Free memory was 68.6 MB in the beginning and 61.6 MB in the end (delta: 7.0 MB). Peak memory consumption was 29.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 522548.98 ms. Allocated memory was 111.1 MB in the beginning and 144.7 MB in the end (delta: 33.6 MB). Free memory was 60.7 MB in the beginning and 34.9 MB in the end (delta: 25.8 MB). Peak memory consumption was 59.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0234-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8 --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 3248e88e6fd49fdcf0a9f78f1aa9e69276951d353f75f39f6bb30d51b2e53989 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:34:19,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:34:19,592 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:34:19,624 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:34:19,624 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:34:19,626 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:34:19,628 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:34:19,630 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:34:19,633 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:34:19,634 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:34:19,635 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:34:19,637 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:34:19,637 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:34:19,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:34:19,640 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:34:19,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:34:19,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:34:19,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:34:19,645 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:34:19,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:34:19,655 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:34:19,656 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:34:19,658 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:34:19,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:34:19,664 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:34:19,672 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:34:19,672 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:34:19,675 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:34:19,676 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:34:19,678 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:34:19,679 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:34:19,680 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:34:19,681 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:34:19,682 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:34:19,683 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:34:19,684 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:34:19,690 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:34:19,691 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:34:19,691 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:34:19,692 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:34:19,693 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:34:19,694 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-07 01:34:19,731 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:34:19,731 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:34:19,732 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:34:19,732 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:34:19,732 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:34:19,733 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:34:19,733 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:34:19,733 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:34:19,733 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:34:19,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 01:34:19,734 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 01:34:19,734 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:34:19,735 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:34:19,735 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 01:34:19,735 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:34:19,735 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:34:19,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:34:19,736 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 01:34:19,736 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 01:34:19,736 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 01:34:19,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:34:19,737 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:34:19,737 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:34:19,737 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:34:19,738 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:34:19,738 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:34:19,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:34:19,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:34:19,739 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:34:19,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:34:19,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:34:19,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:34:19,740 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:34:19,740 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:34:19,740 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:34:19,740 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:34:19,741 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3248e88e6fd49fdcf0a9f78f1aa9e69276951d353f75f39f6bb30d51b2e53989 [2021-11-07 01:34:20,086 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:34:20,108 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:34:20,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:34:20,114 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:34:20,115 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:34:20,116 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/memsafety/test-0234-2.i [2021-11-07 01:34:20,194 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/data/068d0a0c2/66f1eeed3d3d4ba1ac5d62d15b4623ff/FLAGdd2bceb1d [2021-11-07 01:34:20,880 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:34:20,880 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/sv-benchmarks/c/memsafety/test-0234-2.i [2021-11-07 01:34:20,906 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/data/068d0a0c2/66f1eeed3d3d4ba1ac5d62d15b4623ff/FLAGdd2bceb1d [2021-11-07 01:34:21,117 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/data/068d0a0c2/66f1eeed3d3d4ba1ac5d62d15b4623ff [2021-11-07 01:34:21,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:34:21,121 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:34:21,126 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:34:21,131 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:34:21,134 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:34:21,135 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:34:21" (1/1) ... [2021-11-07 01:34:21,136 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@110235f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:21, skipping insertion in model container [2021-11-07 01:34:21,137 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:34:21" (1/1) ... [2021-11-07 01:34:21,146 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:34:21,206 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:34:21,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:34:21,627 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:34:21,690 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:34:21,742 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:34:21,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:21 WrapperNode [2021-11-07 01:34:21,742 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:34:21,744 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:34:21,744 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:34:21,744 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:34:21,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:21" (1/1) ... [2021-11-07 01:34:21,788 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:21" (1/1) ... [2021-11-07 01:34:21,826 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:34:21,827 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:34:21,827 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:34:21,827 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:34:21,836 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:21" (1/1) ... [2021-11-07 01:34:21,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:21" (1/1) ... [2021-11-07 01:34:21,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:21" (1/1) ... [2021-11-07 01:34:21,865 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:21" (1/1) ... [2021-11-07 01:34:21,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:21" (1/1) ... [2021-11-07 01:34:21,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:21" (1/1) ... [2021-11-07 01:34:21,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:21" (1/1) ... [2021-11-07 01:34:21,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:34:21,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:34:21,916 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:34:21,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:34:21,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:21" (1/1) ... [2021-11-07 01:34:21,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:34:21,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:34:21,963 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:34:21,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:34:22,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:34:22,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:34:22,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:34:22,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:34:22,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:34:22,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 01:34:22,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:34:22,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:34:22,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:34:23,181 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:34:23,182 INFO L299 CfgBuilder]: Removed 70 assume(true) statements. [2021-11-07 01:34:23,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:34:23 BoogieIcfgContainer [2021-11-07 01:34:23,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:34:23,186 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:34:23,186 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:34:23,189 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:34:23,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:34:21" (1/3) ... [2021-11-07 01:34:23,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43301cc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:34:23, skipping insertion in model container [2021-11-07 01:34:23,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:21" (2/3) ... [2021-11-07 01:34:23,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43301cc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:34:23, skipping insertion in model container [2021-11-07 01:34:23,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:34:23" (3/3) ... [2021-11-07 01:34:23,192 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0234-2.i [2021-11-07 01:34:23,197 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:34:23,198 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 80 error locations. [2021-11-07 01:34:23,240 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:34:23,246 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:34:23,259 INFO L340 AbstractCegarLoop]: Starting to check reachability of 80 error locations. [2021-11-07 01:34:23,300 INFO L276 IsEmpty]: Start isEmpty. Operand has 204 states, 123 states have (on average 1.910569105691057) internal successors, (235), 203 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:23,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-07 01:34:23,306 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:23,306 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-07 01:34:23,307 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2021-11-07 01:34:23,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:23,327 INFO L85 PathProgramCache]: Analyzing trace with hash 925636, now seen corresponding path program 1 times [2021-11-07 01:34:23,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:23,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592917370] [2021-11-07 01:34:23,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:23,340 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:23,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:23,363 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:23,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:34:23,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:23,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:34:23,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:23,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:34:23,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:23,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:23,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:23,604 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:23,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592917370] [2021-11-07 01:34:23,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592917370] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:23,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:23,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:34:23,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355401582] [2021-11-07 01:34:23,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:34:23,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:23,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:34:23,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:34:23,629 INFO L87 Difference]: Start difference. First operand has 204 states, 123 states have (on average 1.910569105691057) internal successors, (235), 203 states have internal predecessors, (235), 0 states have call successors, (0), 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 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:24,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:24,091 INFO L93 Difference]: Finished difference Result 225 states and 240 transitions. [2021-11-07 01:34:24,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:34:24,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-07 01:34:24,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:24,106 INFO L225 Difference]: With dead ends: 225 [2021-11-07 01:34:24,106 INFO L226 Difference]: Without dead ends: 223 [2021-11-07 01:34:24,109 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:34:24,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-11-07 01:34:24,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 196. [2021-11-07 01:34:24,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 122 states have (on average 1.7295081967213115) internal successors, (211), 195 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:24,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 211 transitions. [2021-11-07 01:34:24,182 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 211 transitions. Word has length 4 [2021-11-07 01:34:24,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:24,182 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 211 transitions. [2021-11-07 01:34:24,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:24,182 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 211 transitions. [2021-11-07 01:34:24,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-07 01:34:24,183 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:24,183 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-07 01:34:24,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:24,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:24,392 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2021-11-07 01:34:24,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:24,393 INFO L85 PathProgramCache]: Analyzing trace with hash 28694756, now seen corresponding path program 1 times [2021-11-07 01:34:24,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:24,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469571878] [2021-11-07 01:34:24,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:24,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:24,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:24,396 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:24,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:34:24,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:24,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:34:24,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:24,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:34:24,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:24,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:24,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:24,662 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:24,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469571878] [2021-11-07 01:34:24,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1469571878] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:24,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:24,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:34:24,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554810040] [2021-11-07 01:34:24,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:34:24,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:24,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:34:24,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:34:24,666 INFO L87 Difference]: Start difference. First operand 196 states and 211 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:25,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:25,717 INFO L93 Difference]: Finished difference Result 195 states and 210 transitions. [2021-11-07 01:34:25,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:34:25,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-07 01:34:25,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:25,720 INFO L225 Difference]: With dead ends: 195 [2021-11-07 01:34:25,721 INFO L226 Difference]: Without dead ends: 195 [2021-11-07 01:34:25,721 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:34:25,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-07 01:34:25,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 190. [2021-11-07 01:34:25,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 122 states have (on average 1.680327868852459) internal successors, (205), 189 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:25,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 205 transitions. [2021-11-07 01:34:25,734 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 205 transitions. Word has length 5 [2021-11-07 01:34:25,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:25,734 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 205 transitions. [2021-11-07 01:34:25,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:25,735 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 205 transitions. [2021-11-07 01:34:25,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 01:34:25,737 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:25,737 INFO L513 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:25,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:25,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:25,951 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2021-11-07 01:34:25,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:25,952 INFO L85 PathProgramCache]: Analyzing trace with hash -144007726, now seen corresponding path program 1 times [2021-11-07 01:34:25,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:25,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1635919786] [2021-11-07 01:34:25,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:25,954 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:25,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:25,955 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:25,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:34:26,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:26,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:34:26,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:26,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:26,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:26,497 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:26,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1635919786] [2021-11-07 01:34:26,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1635919786] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:26,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:26,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:34:26,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094019288] [2021-11-07 01:34:26,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:34:26,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:26,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:34:26,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:34:26,500 INFO L87 Difference]: Start difference. First operand 190 states and 205 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:26,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:26,758 INFO L93 Difference]: Finished difference Result 206 states and 221 transitions. [2021-11-07 01:34:26,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:34:26,759 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 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 50 [2021-11-07 01:34:26,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:26,761 INFO L225 Difference]: With dead ends: 206 [2021-11-07 01:34:26,761 INFO L226 Difference]: Without dead ends: 206 [2021-11-07 01:34:26,762 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:34:26,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-07 01:34:26,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 201. [2021-11-07 01:34:26,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 133 states have (on average 1.6240601503759398) internal successors, (216), 200 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:26,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 216 transitions. [2021-11-07 01:34:26,774 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 216 transitions. Word has length 50 [2021-11-07 01:34:26,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:26,774 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 216 transitions. [2021-11-07 01:34:26,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:26,775 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 216 transitions. [2021-11-07 01:34:26,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:34:26,777 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:26,777 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:26,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:26,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:26,991 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2021-11-07 01:34:26,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:26,992 INFO L85 PathProgramCache]: Analyzing trace with hash 625067043, now seen corresponding path program 1 times [2021-11-07 01:34:26,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:26,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [53243229] [2021-11-07 01:34:26,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:26,994 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:26,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:26,997 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:27,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:34:27,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:27,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:34:27,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:27,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:34:27,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:27,788 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:34:27,788 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:27,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [53243229] [2021-11-07 01:34:27,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [53243229] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:34:27,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2051318313] [2021-11-07 01:34:27,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:27,789 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:34:27,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:34:27,795 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:34:27,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-07 01:34:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:28,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:34:28,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:34:28,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:28,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:34:28,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2051318313] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:34:28,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346600449] [2021-11-07 01:34:28,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:28,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:34:28,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:34:28,707 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:34:28,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 01:34:29,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:29,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:34:29,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:29,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 01:34:29,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:29,399 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 01:34:29,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346600449] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:34:29,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:34:29,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 5, 5] total 14 [2021-11-07 01:34:29,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010527196] [2021-11-07 01:34:29,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 01:34:29,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:29,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 01:34:29,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:34:29,403 INFO L87 Difference]: Start difference. First operand 201 states and 216 transitions. Second operand has 14 states, 14 states have (on average 8.357142857142858) internal successors, (117), 14 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:30,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:30,191 INFO L93 Difference]: Finished difference Result 230 states and 245 transitions. [2021-11-07 01:34:30,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 01:34:30,193 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.357142857142858) internal successors, (117), 14 states have internal predecessors, (117), 0 states have call successors, (0), 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 61 [2021-11-07 01:34:30,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:30,194 INFO L225 Difference]: With dead ends: 230 [2021-11-07 01:34:30,195 INFO L226 Difference]: Without dead ends: 230 [2021-11-07 01:34:30,195 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:34:30,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-11-07 01:34:30,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 225. [2021-11-07 01:34:30,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 157 states have (on average 1.5286624203821657) internal successors, (240), 224 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:30,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 240 transitions. [2021-11-07 01:34:30,207 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 240 transitions. Word has length 61 [2021-11-07 01:34:30,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:30,208 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 240 transitions. [2021-11-07 01:34:30,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.357142857142858) internal successors, (117), 14 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:30,208 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 240 transitions. [2021-11-07 01:34:30,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:34:30,212 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:30,212 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:30,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:30,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2021-11-07 01:34:30,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-07 01:34:30,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:34:30,828 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2021-11-07 01:34:30,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:30,828 INFO L85 PathProgramCache]: Analyzing trace with hash 834008163, now seen corresponding path program 2 times [2021-11-07 01:34:30,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:30,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2097405876] [2021-11-07 01:34:30,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:34:30,830 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:30,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:30,832 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:30,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:34:31,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-07 01:34:31,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:34:31,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:34:31,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:31,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:34:31,591 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-07 01:34:31,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2021-11-07 01:34:31,814 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-07 01:34:31,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:32,071 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-07 01:34:32,071 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:32,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2097405876] [2021-11-07 01:34:32,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2097405876] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:32,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:32,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-07 01:34:32,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628851027] [2021-11-07 01:34:32,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:34:32,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:32,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:34:32,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:34:32,074 INFO L87 Difference]: Start difference. First operand 225 states and 240 transitions. Second operand has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 8 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) [2021-11-07 01:34:33,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:33,011 INFO L93 Difference]: Finished difference Result 306 states and 325 transitions. [2021-11-07 01:34:33,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:34:33,012 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 8 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 85 [2021-11-07 01:34:33,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:33,014 INFO L225 Difference]: With dead ends: 306 [2021-11-07 01:34:33,014 INFO L226 Difference]: Without dead ends: 306 [2021-11-07 01:34:33,015 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 165 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:34:33,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-11-07 01:34:33,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 223. [2021-11-07 01:34:33,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 157 states have (on average 1.515923566878981) internal successors, (238), 222 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:33,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 238 transitions. [2021-11-07 01:34:33,023 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 238 transitions. Word has length 85 [2021-11-07 01:34:33,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:33,024 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 238 transitions. [2021-11-07 01:34:33,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 8 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) [2021-11-07 01:34:33,025 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 238 transitions. [2021-11-07 01:34:33,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:34:33,026 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:33,027 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:33,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:33,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:33,235 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2021-11-07 01:34:33,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:33,236 INFO L85 PathProgramCache]: Analyzing trace with hash 834008164, now seen corresponding path program 1 times [2021-11-07 01:34:33,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:33,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1436284528] [2021-11-07 01:34:33,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:33,237 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:33,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:33,238 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:33,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:34:33,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:33,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 01:34:33,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:34,059 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-07 01:34:34,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-07 01:34:34,574 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:34,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1436284528] [2021-11-07 01:34:34,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1436284528] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:34:34,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1367954137] [2021-11-07 01:34:34,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:34,575 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:34:34,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:34:34,576 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:34:34,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-07 01:34:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:35,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 01:34:35,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:35,550 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-07 01:34:35,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-07 01:34:35,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1367954137] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:34:35,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464196742] [2021-11-07 01:34:35,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:35,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:34:35,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:34:35,789 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:34:35,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 01:34:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:36,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 01:34:36,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:36,704 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-07 01:34:36,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:37,414 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-07 01:34:37,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464196742] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:34:37,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:34:37,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 31 [2021-11-07 01:34:37,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520484182] [2021-11-07 01:34:37,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-07 01:34:37,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:37,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-07 01:34:37,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=685, Unknown=0, NotChecked=0, Total=930 [2021-11-07 01:34:37,421 INFO L87 Difference]: Start difference. First operand 223 states and 238 transitions. Second operand has 31 states, 31 states have (on average 4.290322580645161) internal successors, (133), 31 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:40,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:40,834 INFO L93 Difference]: Finished difference Result 279 states and 299 transitions. [2021-11-07 01:34:40,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-07 01:34:40,836 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.290322580645161) internal successors, (133), 31 states have internal predecessors, (133), 0 states have call successors, (0), 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 85 [2021-11-07 01:34:40,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:40,838 INFO L225 Difference]: With dead ends: 279 [2021-11-07 01:34:40,839 INFO L226 Difference]: Without dead ends: 279 [2021-11-07 01:34:40,841 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=517, Invalid=1553, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 01:34:40,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-11-07 01:34:40,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 266. [2021-11-07 01:34:40,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 200 states have (on average 1.43) internal successors, (286), 265 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:40,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 286 transitions. [2021-11-07 01:34:40,852 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 286 transitions. Word has length 85 [2021-11-07 01:34:40,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:40,854 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 286 transitions. [2021-11-07 01:34:40,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.290322580645161) internal successors, (133), 31 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:40,855 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 286 transitions. [2021-11-07 01:34:40,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 01:34:40,863 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:40,867 INFO L513 BasicCegarLoop]: trace histogram [13, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:40,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:41,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:41,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:41,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:34:41,485 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2021-11-07 01:34:41,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:41,486 INFO L85 PathProgramCache]: Analyzing trace with hash -229120476, now seen corresponding path program 2 times [2021-11-07 01:34:41,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:41,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1652086947] [2021-11-07 01:34:41,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:34:41,487 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:41,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:41,488 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:41,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:34:42,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-07 01:34:42,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:34:42,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:34:42,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:42,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:34:42,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:34:42,568 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-07 01:34:42,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2021-11-07 01:34:42,615 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:34:42,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-11-07 01:34:43,349 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2021-11-07 01:34:43,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:47,203 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2021-11-07 01:34:47,203 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:47,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1652086947] [2021-11-07 01:34:47,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1652086947] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:47,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:47,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-07 01:34:47,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989534850] [2021-11-07 01:34:47,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:34:47,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:47,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:34:47,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:34:47,206 INFO L87 Difference]: Start difference. First operand 266 states and 286 transitions. Second operand has 12 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 12 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:35,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:35,183 INFO L93 Difference]: Finished difference Result 268 states and 288 transitions. [2021-11-07 01:35:35,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:35:35,185 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 12 states have internal predecessors, (74), 0 states have call successors, (0), 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 103 [2021-11-07 01:35:35,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:35,187 INFO L225 Difference]: With dead ends: 268 [2021-11-07 01:35:35,187 INFO L226 Difference]: Without dead ends: 268 [2021-11-07 01:35:35,188 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:35:35,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-07 01:35:35,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 264. [2021-11-07 01:35:35,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 200 states have (on average 1.42) internal successors, (284), 263 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:35,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 284 transitions. [2021-11-07 01:35:35,195 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 284 transitions. Word has length 103 [2021-11-07 01:35:35,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:35,195 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 284 transitions. [2021-11-07 01:35:35,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 12 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:35,196 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 284 transitions. [2021-11-07 01:35:35,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-07 01:35:35,197 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:35,198 INFO L513 BasicCegarLoop]: trace histogram [13, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:35,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-07 01:35:35,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:35:35,426 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2021-11-07 01:35:35,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:35,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1141442396, now seen corresponding path program 1 times [2021-11-07 01:35:35,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:35,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735206820] [2021-11-07 01:35:35,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:35,428 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:35,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:35,428 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:35,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:35:36,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:36,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 01:35:36,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:37,502 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-07 01:35:37,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:38,520 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-07 01:35:38,521 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:38,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [735206820] [2021-11-07 01:35:38,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [735206820] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:35:38,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2008585472] [2021-11-07 01:35:38,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:38,522 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:35:38,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:35:38,523 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:35:38,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-07 01:35:39,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:39,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 01:35:39,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:39,953 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-07 01:35:39,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:40,210 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-07 01:35:40,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2008585472] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:35:40,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66626703] [2021-11-07 01:35:40,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:40,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:35:40,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:35:40,212 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:35:40,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 01:35:40,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:40,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 01:35:41,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:41,392 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-07 01:35:41,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:44,011 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-07 01:35:44,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66626703] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:35:44,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:35:44,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17, 17, 17] total 46 [2021-11-07 01:35:44,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830437188] [2021-11-07 01:35:44,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-07 01:35:44,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:44,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-07 01:35:44,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=525, Invalid=1545, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 01:35:44,015 INFO L87 Difference]: Start difference. First operand 264 states and 284 transitions. Second operand has 46 states, 46 states have (on average 2.239130434782609) internal successors, (103), 46 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:03,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:03,181 INFO L93 Difference]: Finished difference Result 313 states and 333 transitions. [2021-11-07 01:36:03,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-07 01:36:03,183 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.239130434782609) internal successors, (103), 46 states have internal predecessors, (103), 0 states have call successors, (0), 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 105 [2021-11-07 01:36:03,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:03,185 INFO L225 Difference]: With dead ends: 313 [2021-11-07 01:36:03,185 INFO L226 Difference]: Without dead ends: 313 [2021-11-07 01:36:03,187 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 580 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1512, Invalid=4188, Unknown=0, NotChecked=0, Total=5700 [2021-11-07 01:36:03,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-11-07 01:36:03,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 284. [2021-11-07 01:36:03,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 220 states have (on average 1.3818181818181818) internal successors, (304), 283 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:03,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 304 transitions. [2021-11-07 01:36:03,196 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 304 transitions. Word has length 105 [2021-11-07 01:36:03,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:03,197 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 304 transitions. [2021-11-07 01:36:03,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.239130434782609) internal successors, (103), 46 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:03,197 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 304 transitions. [2021-11-07 01:36:03,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-07 01:36:03,198 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:03,199 INFO L513 BasicCegarLoop]: trace histogram [28, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:36:03,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-07 01:36:03,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:03,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-07 01:36:03,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:36:03,813 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2021-11-07 01:36:03,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:03,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1520636589, now seen corresponding path program 2 times [2021-11-07 01:36:03,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:03,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [953425706] [2021-11-07 01:36:03,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:36:03,814 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:03,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:03,815 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:03,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:36:04,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-07 01:36:04,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:36:04,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 01:36:04,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:04,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:36:04,917 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-07 01:36:04,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 33 [2021-11-07 01:36:05,368 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-07 01:36:05,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 43 treesize of output 54 [2021-11-07 01:36:06,327 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 586 trivial. 0 not checked. [2021-11-07 01:36:06,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:41,157 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 586 trivial. 0 not checked. [2021-11-07 01:36:41,158 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:41,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [953425706] [2021-11-07 01:36:41,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [953425706] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:41,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:41,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-11-07 01:36:41,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283775497] [2021-11-07 01:36:41,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 01:36:41,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:41,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 01:36:41,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=138, Unknown=13, NotChecked=0, Total=182 [2021-11-07 01:36:41,161 INFO L87 Difference]: Start difference. First operand 284 states and 304 transitions. Second operand has 14 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:42,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:42,903 INFO L93 Difference]: Finished difference Result 396 states and 424 transitions. [2021-11-07 01:36:42,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 01:36:42,903 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-11-07 01:36:42,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:42,906 INFO L225 Difference]: With dead ends: 396 [2021-11-07 01:36:42,906 INFO L226 Difference]: Without dead ends: 396 [2021-11-07 01:36:42,907 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 231 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 34.8s TimeCoverageRelationStatistics Valid=188, Invalid=449, Unknown=13, NotChecked=0, Total=650 [2021-11-07 01:36:42,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-11-07 01:36:42,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 281. [2021-11-07 01:36:42,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 220 states have (on average 1.3681818181818182) internal successors, (301), 280 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:42,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 301 transitions. [2021-11-07 01:36:42,915 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 301 transitions. Word has length 120 [2021-11-07 01:36:42,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:42,916 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 301 transitions. [2021-11-07 01:36:42,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:42,916 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 301 transitions. [2021-11-07 01:36:42,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-07 01:36:42,918 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:42,918 INFO L513 BasicCegarLoop]: trace histogram [28, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:36:42,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:43,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:43,131 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2021-11-07 01:36:43,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:43,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1520636588, now seen corresponding path program 1 times [2021-11-07 01:36:43,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:43,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1293143212] [2021-11-07 01:36:43,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:43,132 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:43,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:43,134 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:43,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:36:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:45,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-07 01:36:45,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:46,283 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-07 01:36:46,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:49,158 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-07 01:36:49,158 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:49,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1293143212] [2021-11-07 01:36:49,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1293143212] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:36:49,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1292591901] [2021-11-07 01:36:49,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:49,159 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:36:49,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:36:49,160 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:36:49,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-07 01:36:50,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:50,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-07 01:36:50,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:51,100 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-07 01:36:51,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:51,437 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-07 01:36:51,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1292591901] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:36:51,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061042562] [2021-11-07 01:36:51,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:51,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:36:51,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:36:51,438 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:36:51,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 01:36:52,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:52,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-07 01:36:52,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:53,028 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-07 01:36:53,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:04,488 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-07 01:37:04,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061042562] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:37:04,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:37:04,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32, 32, 32, 32] total 91 [2021-11-07 01:37:04,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265410444] [2021-11-07 01:37:04,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-11-07 01:37:04,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:04,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-11-07 01:37:04,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1950, Invalid=6240, Unknown=0, NotChecked=0, Total=8190 [2021-11-07 01:37:04,495 INFO L87 Difference]: Start difference. First operand 281 states and 301 transitions. Second operand has 91 states, 91 states have (on average 1.6263736263736264) internal successors, (148), 91 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:38,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:38,920 INFO L93 Difference]: Finished difference Result 727 states and 817 transitions. [2021-11-07 01:38:38,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-11-07 01:38:38,923 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.6263736263736264) internal successors, (148), 91 states have internal predecessors, (148), 0 states have call successors, (0), 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 120 [2021-11-07 01:38:38,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:38,928 INFO L225 Difference]: With dead ends: 727 [2021-11-07 01:38:38,929 INFO L226 Difference]: Without dead ends: 727 [2021-11-07 01:38:38,936 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 787 GetRequests, 625 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5333 ImplicationChecksByTransitivity, 32.9s TimeCoverageRelationStatistics Valid=6466, Invalid=20266, Unknown=0, NotChecked=0, Total=26732 [2021-11-07 01:38:38,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2021-11-07 01:38:38,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 386. [2021-11-07 01:38:38,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 325 states have (on average 1.4646153846153847) internal successors, (476), 385 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:38,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 476 transitions. [2021-11-07 01:38:38,950 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 476 transitions. Word has length 120 [2021-11-07 01:38:38,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:38,951 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 476 transitions. [2021-11-07 01:38:38,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.6263736263736264) internal successors, (148), 91 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:38,952 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 476 transitions. [2021-11-07 01:38:38,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-07 01:38:38,953 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:38,954 INFO L513 BasicCegarLoop]: trace histogram [58, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:38:38,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:39,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-07 01:38:39,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:39,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:38:39,568 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2021-11-07 01:38:39,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:39,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1272251084, now seen corresponding path program 2 times [2021-11-07 01:38:39,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:39,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [314828446] [2021-11-07 01:38:39,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:38:39,570 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:39,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:39,570 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:39,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fce4e4c4-9e1e-49f5-8b92-93c1d8a9292c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:38:40,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-07 01:38:40,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:38:40,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-07 01:38:40,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:40,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:38:40,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:38:41,061 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-07 01:38:41,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2021-11-07 01:38:41,109 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:38:41,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-11-07 01:38:41,461 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-07 01:38:41,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-11-07 01:38:43,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1891 trivial. 0 not checked. [2021-11-07 01:38:43,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:49,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1891 trivial. 0 not checked. [2021-11-07 01:38:49,648 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:49,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [314828446] [2021-11-07 01:38:49,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [314828446] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:49,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:49,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 15 [2021-11-07 01:38:49,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089727920] [2021-11-07 01:38:49,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:38:49,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:49,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:38:49,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:38:49,650 INFO L87 Difference]: Start difference. First operand 386 states and 476 transitions. Second operand has 16 states, 15 states have (on average 5.8) internal successors, (87), 16 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:05,492 WARN L207 SmtUtils]: Spent 5.67 s on a formula simplification that was a NOOP. DAG size: 63