./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e0e4fff172a515598d076941b225a1a1f31b97f5ac14127a866784b10a4e3537 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 01:21:23,425 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 01:21:23,426 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 01:21:23,448 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 01:21:23,448 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 01:21:23,449 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 01:21:23,451 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 01:21:23,452 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 01:21:23,454 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 01:21:23,455 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 01:21:23,455 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 01:21:23,456 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 01:21:23,457 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 01:21:23,458 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 01:21:23,459 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 01:21:23,460 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 01:21:23,461 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 01:21:23,462 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 01:21:23,463 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 01:21:23,465 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 01:21:23,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 01:21:23,467 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 01:21:23,468 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 01:21:23,469 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 01:21:23,472 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 01:21:23,472 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 01:21:23,472 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 01:21:23,473 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 01:21:23,474 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 01:21:23,474 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 01:21:23,475 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 01:21:23,475 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 01:21:23,476 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 01:21:23,477 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 01:21:23,477 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 01:21:23,478 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 01:21:23,478 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 01:21:23,478 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 01:21:23,478 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 01:21:23,479 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 01:21:23,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 01:21:23,480 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-07 01:21:23,497 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 01:21:23,497 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 01:21:23,498 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 01:21:23,498 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 01:21:23,498 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 01:21:23,498 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 01:21:23,499 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 01:21:23,499 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 01:21:23,499 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 01:21:23,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 01:21:23,499 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 01:21:23,499 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-07 01:21:23,499 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 01:21:23,500 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 01:21:23,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 01:21:23,500 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-07 01:21:23,500 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-07 01:21:23,500 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-07 01:21:23,500 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 01:21:23,500 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-07 01:21:23,500 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 01:21:23,500 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 01:21:23,501 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 01:21:23,501 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 01:21:23,501 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 01:21:23,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:21:23,501 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 01:21:23,501 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 01:21:23,501 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 01:21:23,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 01:21:23,501 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 01:21:23,502 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0e4fff172a515598d076941b225a1a1f31b97f5ac14127a866784b10a4e3537 [2021-12-07 01:21:23,693 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 01:21:23,709 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 01:21:23,710 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 01:21:23,711 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 01:21:23,712 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 01:21:23,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2021-12-07 01:21:23,756 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/data/c5db88a5f/946deab07d3f4cc9be1a9832538a61d5/FLAG7d7404045 [2021-12-07 01:21:24,169 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 01:21:24,170 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2021-12-07 01:21:24,180 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/data/c5db88a5f/946deab07d3f4cc9be1a9832538a61d5/FLAG7d7404045 [2021-12-07 01:21:24,190 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/data/c5db88a5f/946deab07d3f4cc9be1a9832538a61d5 [2021-12-07 01:21:24,192 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 01:21:24,193 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 01:21:24,194 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 01:21:24,194 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 01:21:24,197 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 01:21:24,197 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:21:24" (1/1) ... [2021-12-07 01:21:24,198 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f6774d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:24, skipping insertion in model container [2021-12-07 01:21:24,198 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:21:24" (1/1) ... [2021-12-07 01:21:24,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 01:21:24,234 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 01:21:24,448 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i[24640,24653] [2021-12-07 01:21:24,450 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:21:24,456 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 01:21:24,485 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i[24640,24653] [2021-12-07 01:21:24,485 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:21:24,506 INFO L208 MainTranslator]: Completed translation [2021-12-07 01:21:24,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:24 WrapperNode [2021-12-07 01:21:24,506 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 01:21:24,507 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 01:21:24,507 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 01:21:24,507 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 01:21:24,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:24" (1/1) ... [2021-12-07 01:21:24,524 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:24" (1/1) ... [2021-12-07 01:21:24,541 INFO L137 Inliner]: procedures = 127, calls = 47, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 140 [2021-12-07 01:21:24,542 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 01:21:24,542 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 01:21:24,542 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 01:21:24,542 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 01:21:24,548 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:24" (1/1) ... [2021-12-07 01:21:24,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:24" (1/1) ... [2021-12-07 01:21:24,552 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:24" (1/1) ... [2021-12-07 01:21:24,552 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:24" (1/1) ... [2021-12-07 01:21:24,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:24" (1/1) ... [2021-12-07 01:21:24,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:24" (1/1) ... [2021-12-07 01:21:24,563 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:24" (1/1) ... [2021-12-07 01:21:24,565 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 01:21:24,566 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 01:21:24,566 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 01:21:24,566 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 01:21:24,567 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:24" (1/1) ... [2021-12-07 01:21:24,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:21:24,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:21:24,594 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 01:21:24,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 01:21:24,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-07 01:21:24,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-07 01:21:24,633 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-12-07 01:21:24,633 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-12-07 01:21:24,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-07 01:21:24,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 01:21:24,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-07 01:21:24,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-07 01:21:24,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-07 01:21:24,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 01:21:24,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-07 01:21:24,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 01:21:24,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 01:21:24,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 01:21:24,708 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 01:21:24,709 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 01:21:24,976 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 01:21:24,982 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 01:21:24,982 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-07 01:21:24,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:21:24 BoogieIcfgContainer [2021-12-07 01:21:24,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 01:21:24,985 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 01:21:24,985 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 01:21:24,987 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 01:21:24,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:21:24" (1/3) ... [2021-12-07 01:21:24,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@700a61e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:21:24, skipping insertion in model container [2021-12-07 01:21:24,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:24" (2/3) ... [2021-12-07 01:21:24,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@700a61e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:21:24, skipping insertion in model container [2021-12-07 01:21:24,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:21:24" (3/3) ... [2021-12-07 01:21:24,990 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_prepend_equal.i [2021-12-07 01:21:24,993 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 01:21:24,994 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 60 error locations. [2021-12-07 01:21:25,026 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 01:21:25,031 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 [2021-12-07 01:21:25,031 INFO L340 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2021-12-07 01:21:25,044 INFO L276 IsEmpty]: Start isEmpty. Operand has 130 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 125 states have internal predecessors, (137), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:21:25,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-07 01:21:25,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:25,049 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-07 01:21:25,049 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:21:25,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:25,053 INFO L85 PathProgramCache]: Analyzing trace with hash 895303154, now seen corresponding path program 1 times [2021-12-07 01:21:25,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:21:25,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269079850] [2021-12-07 01:21:25,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:25,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:21:25,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:25,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:21:25,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:21:25,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269079850] [2021-12-07 01:21:25,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269079850] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:21:25,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:21:25,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:21:25,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202200189] [2021-12-07 01:21:25,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:21:25,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:21:25,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:21:25,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:21:25,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:21:25,219 INFO L87 Difference]: Start difference. First operand has 130 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 125 states have internal predecessors, (137), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:21:25,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:25,311 INFO L93 Difference]: Finished difference Result 127 states and 136 transitions. [2021-12-07 01:21:25,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:21:25,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-07 01:21:25,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:25,319 INFO L225 Difference]: With dead ends: 127 [2021-12-07 01:21:25,319 INFO L226 Difference]: Without dead ends: 124 [2021-12-07 01:21:25,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:21:25,323 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 10 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:25,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 193 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:21:25,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-07 01:21:25,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-12-07 01:21:25,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 63 states have (on average 2.0) internal successors, (126), 119 states have internal predecessors, (126), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:21:25,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 132 transitions. [2021-12-07 01:21:25,356 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 132 transitions. Word has length 6 [2021-12-07 01:21:25,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:25,356 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 132 transitions. [2021-12-07 01:21:25,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:21:25,356 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 132 transitions. [2021-12-07 01:21:25,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-07 01:21:25,357 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:25,357 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-07 01:21:25,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 01:21:25,357 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:21:25,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:25,358 INFO L85 PathProgramCache]: Analyzing trace with hash 895303155, now seen corresponding path program 1 times [2021-12-07 01:21:25,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:21:25,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956552131] [2021-12-07 01:21:25,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:25,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:21:25,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:25,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:21:25,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:21:25,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956552131] [2021-12-07 01:21:25,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956552131] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:21:25,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:21:25,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:21:25,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187254189] [2021-12-07 01:21:25,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:21:25,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:21:25,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:21:25,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:21:25,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:21:25,404 INFO L87 Difference]: Start difference. First operand 124 states and 132 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:21:25,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:25,474 INFO L93 Difference]: Finished difference Result 121 states and 129 transitions. [2021-12-07 01:21:25,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:21:25,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-07 01:21:25,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:25,475 INFO L225 Difference]: With dead ends: 121 [2021-12-07 01:21:25,475 INFO L226 Difference]: Without dead ends: 121 [2021-12-07 01:21:25,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:21:25,477 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 5 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:25,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 195 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:21:25,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-07 01:21:25,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-12-07 01:21:25,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 63 states have (on average 1.9523809523809523) internal successors, (123), 116 states have internal predecessors, (123), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:21:25,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 129 transitions. [2021-12-07 01:21:25,486 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 129 transitions. Word has length 6 [2021-12-07 01:21:25,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:25,486 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 129 transitions. [2021-12-07 01:21:25,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:21:25,486 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 129 transitions. [2021-12-07 01:21:25,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-07 01:21:25,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:25,487 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:25,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-07 01:21:25,487 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:21:25,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:25,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1495162356, now seen corresponding path program 1 times [2021-12-07 01:21:25,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:21:25,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056760784] [2021-12-07 01:21:25,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:25,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:21:25,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:25,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:21:25,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:25,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:21:25,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:21:25,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056760784] [2021-12-07 01:21:25,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056760784] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:21:25,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:21:25,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:21:25,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158666897] [2021-12-07 01:21:25,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:21:25,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:21:25,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:21:25,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:21:25,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:21:25,568 INFO L87 Difference]: Start difference. First operand 121 states and 129 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-07 01:21:25,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:25,664 INFO L93 Difference]: Finished difference Result 132 states and 142 transitions. [2021-12-07 01:21:25,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:21:25,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-07 01:21:25,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:25,665 INFO L225 Difference]: With dead ends: 132 [2021-12-07 01:21:25,665 INFO L226 Difference]: Without dead ends: 132 [2021-12-07 01:21:25,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:21:25,667 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 10 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:25,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 292 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:21:25,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-07 01:21:25,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 122. [2021-12-07 01:21:25,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 64 states have (on average 1.9375) internal successors, (124), 117 states have internal predecessors, (124), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:21:25,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 130 transitions. [2021-12-07 01:21:25,676 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 130 transitions. Word has length 14 [2021-12-07 01:21:25,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:25,676 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 130 transitions. [2021-12-07 01:21:25,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-07 01:21:25,676 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 130 transitions. [2021-12-07 01:21:25,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-07 01:21:25,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:25,677 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:25,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-07 01:21:25,677 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:21:25,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:25,678 INFO L85 PathProgramCache]: Analyzing trace with hash 2091192736, now seen corresponding path program 1 times [2021-12-07 01:21:25,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:21:25,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357113894] [2021-12-07 01:21:25,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:25,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:21:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:25,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:21:25,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:25,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-07 01:21:25,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:25,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 01:21:25,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:21:25,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357113894] [2021-12-07 01:21:25,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357113894] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:21:25,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:21:25,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-07 01:21:25,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575576299] [2021-12-07 01:21:25,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:21:25,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 01:21:25,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:21:25,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 01:21:25,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:21:25,791 INFO L87 Difference]: Start difference. First operand 122 states and 130 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:21:25,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:25,974 INFO L93 Difference]: Finished difference Result 122 states and 131 transitions. [2021-12-07 01:21:25,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:21:25,975 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-12-07 01:21:25,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:25,977 INFO L225 Difference]: With dead ends: 122 [2021-12-07 01:21:25,977 INFO L226 Difference]: Without dead ends: 122 [2021-12-07 01:21:25,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:21:25,979 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 21 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:25,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 394 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:21:25,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-07 01:21:25,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2021-12-07 01:21:25,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 64 states have (on average 1.921875) internal successors, (123), 116 states have internal predecessors, (123), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:21:25,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 129 transitions. [2021-12-07 01:21:25,990 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 129 transitions. Word has length 24 [2021-12-07 01:21:25,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:25,990 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 129 transitions. [2021-12-07 01:21:25,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:21:25,990 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 129 transitions. [2021-12-07 01:21:25,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-07 01:21:25,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:25,991 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:25,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-07 01:21:25,992 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:21:25,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:25,992 INFO L85 PathProgramCache]: Analyzing trace with hash 2091192737, now seen corresponding path program 1 times [2021-12-07 01:21:25,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:21:25,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135612892] [2021-12-07 01:21:25,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:25,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:21:26,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:26,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:21:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:26,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-07 01:21:26,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:26,131 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:21:26,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:21:26,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135612892] [2021-12-07 01:21:26,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135612892] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:21:26,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:21:26,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-07 01:21:26,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968921652] [2021-12-07 01:21:26,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:21:26,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 01:21:26,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:21:26,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 01:21:26,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:21:26,133 INFO L87 Difference]: Start difference. First operand 121 states and 129 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:21:26,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:26,302 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2021-12-07 01:21:26,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:21:26,302 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-12-07 01:21:26,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:26,304 INFO L225 Difference]: With dead ends: 121 [2021-12-07 01:21:26,304 INFO L226 Difference]: Without dead ends: 121 [2021-12-07 01:21:26,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:21:26,305 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 19 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:26,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 418 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:21:26,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-07 01:21:26,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2021-12-07 01:21:26,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 64 states have (on average 1.90625) internal successors, (122), 115 states have internal predecessors, (122), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:21:26,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 128 transitions. [2021-12-07 01:21:26,314 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 128 transitions. Word has length 24 [2021-12-07 01:21:26,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:26,315 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 128 transitions. [2021-12-07 01:21:26,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:21:26,315 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 128 transitions. [2021-12-07 01:21:26,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-07 01:21:26,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:26,316 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:26,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-07 01:21:26,316 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:21:26,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:26,317 INFO L85 PathProgramCache]: Analyzing trace with hash -408475519, now seen corresponding path program 1 times [2021-12-07 01:21:26,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:21:26,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975755968] [2021-12-07 01:21:26,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:26,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:21:26,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:26,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:21:26,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:26,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-07 01:21:26,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:26,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:21:26,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:21:26,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975755968] [2021-12-07 01:21:26,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975755968] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:21:26,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4647533] [2021-12-07 01:21:26,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:26,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:21:26,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:21:26,465 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:21:26,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 01:21:26,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:26,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-07 01:21:26,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:21:26,575 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 [2021-12-07 01:21:26,744 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:21:26,744 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 [2021-12-07 01:21:26,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:21:26,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:21:26,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4647533] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:21:26,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:21:26,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-12-07 01:21:26,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093337666] [2021-12-07 01:21:26,803 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:21:26,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-07 01:21:26,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:21:26,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-07 01:21:26,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-07 01:21:26,804 INFO L87 Difference]: Start difference. First operand 120 states and 128 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:21:27,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:27,008 INFO L93 Difference]: Finished difference Result 145 states and 156 transitions. [2021-12-07 01:21:27,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:21:27,008 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-12-07 01:21:27,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:27,009 INFO L225 Difference]: With dead ends: 145 [2021-12-07 01:21:27,009 INFO L226 Difference]: Without dead ends: 145 [2021-12-07 01:21:27,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-07 01:21:27,010 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 102 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:27,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 414 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 388 Invalid, 0 Unknown, 75 Unchecked, 0.2s Time] [2021-12-07 01:21:27,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-07 01:21:27,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 125. [2021-12-07 01:21:27,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 68 states have (on average 1.8823529411764706) internal successors, (128), 119 states have internal predecessors, (128), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 01:21:27,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2021-12-07 01:21:27,017 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 26 [2021-12-07 01:21:27,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:27,017 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2021-12-07 01:21:27,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:21:27,018 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2021-12-07 01:21:27,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-07 01:21:27,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:27,018 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:27,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 01:21:27,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-07 01:21:27,219 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:21:27,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:27,220 INFO L85 PathProgramCache]: Analyzing trace with hash -408475518, now seen corresponding path program 1 times [2021-12-07 01:21:27,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:21:27,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845696490] [2021-12-07 01:21:27,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:27,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:21:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:27,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:21:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:27,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-07 01:21:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:27,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:21:27,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:21:27,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845696490] [2021-12-07 01:21:27,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845696490] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:21:27,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325118807] [2021-12-07 01:21:27,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:27,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:21:27,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:21:27,410 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:21:27,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 01:21:27,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:27,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-07 01:21:27,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:21:27,487 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 [2021-12-07 01:21:27,672 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-12-07 01:21:27,673 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 16 treesize of output 15 [2021-12-07 01:21:27,691 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:21:27,691 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 11 treesize of output 11 [2021-12-07 01:21:27,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:21:27,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:21:27,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325118807] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:21:27,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:21:27,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-12-07 01:21:27,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170163400] [2021-12-07 01:21:27,833 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:21:27,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-07 01:21:27,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:21:27,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-07 01:21:27,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-12-07 01:21:27,834 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 15 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-07 01:21:28,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:28,279 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2021-12-07 01:21:28,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 01:21:28,279 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 15 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2021-12-07 01:21:28,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:28,280 INFO L225 Difference]: With dead ends: 127 [2021-12-07 01:21:28,280 INFO L226 Difference]: Without dead ends: 127 [2021-12-07 01:21:28,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-12-07 01:21:28,281 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 19 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:28,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 636 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 01:21:28,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-07 01:21:28,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2021-12-07 01:21:28,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 68 states have (on average 1.8676470588235294) internal successors, (127), 119 states have internal predecessors, (127), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 01:21:28,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 135 transitions. [2021-12-07 01:21:28,287 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 135 transitions. Word has length 26 [2021-12-07 01:21:28,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:28,287 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 135 transitions. [2021-12-07 01:21:28,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 15 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-07 01:21:28,287 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 135 transitions. [2021-12-07 01:21:28,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-07 01:21:28,288 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:28,288 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:28,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-07 01:21:28,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:21:28,488 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:21:28,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:28,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1702795689, now seen corresponding path program 1 times [2021-12-07 01:21:28,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:21:28,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300754927] [2021-12-07 01:21:28,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:28,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:21:28,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:28,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:21:28,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:28,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-07 01:21:28,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:28,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:21:28,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:21:28,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300754927] [2021-12-07 01:21:28,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300754927] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:21:28,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682117267] [2021-12-07 01:21:28,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:28,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:21:28,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:21:28,564 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:21:28,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 01:21:28,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:28,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-07 01:21:28,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:21:28,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:21:28,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:21:28,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:21:28,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682117267] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:21:28,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:21:28,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2021-12-07 01:21:28,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456137165] [2021-12-07 01:21:28,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:21:28,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 01:21:28,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:21:28,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 01:21:28,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:21:28,775 INFO L87 Difference]: Start difference. First operand 125 states and 135 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:21:28,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:28,881 INFO L93 Difference]: Finished difference Result 126 states and 135 transitions. [2021-12-07 01:21:28,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:21:28,881 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-12-07 01:21:28,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:28,882 INFO L225 Difference]: With dead ends: 126 [2021-12-07 01:21:28,882 INFO L226 Difference]: Without dead ends: 126 [2021-12-07 01:21:28,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:21:28,883 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 4 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:28,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 616 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:21:28,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-07 01:21:28,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2021-12-07 01:21:28,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 68 states have (on average 1.8529411764705883) internal successors, (126), 119 states have internal predecessors, (126), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 01:21:28,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 134 transitions. [2021-12-07 01:21:28,890 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 134 transitions. Word has length 28 [2021-12-07 01:21:28,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:28,890 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 134 transitions. [2021-12-07 01:21:28,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:21:28,891 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 134 transitions. [2021-12-07 01:21:28,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-07 01:21:28,891 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:28,892 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:28,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 01:21:29,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:21:29,093 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:21:29,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:29,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1251839470, now seen corresponding path program 1 times [2021-12-07 01:21:29,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:21:29,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467548409] [2021-12-07 01:21:29,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:29,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:21:29,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:29,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:21:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:29,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-07 01:21:29,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:29,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 01:21:29,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:21:29,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467548409] [2021-12-07 01:21:29,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467548409] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:21:29,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392639631] [2021-12-07 01:21:29,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:29,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:21:29,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:21:29,268 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:21:29,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 01:21:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:29,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-07 01:21:29,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:21:29,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 01:21:29,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:21:29,386 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-07 01:21:29,386 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 [2021-12-07 01:21:29,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 01:21:29,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392639631] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:21:29,415 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:21:29,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 5 [2021-12-07 01:21:29,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383503305] [2021-12-07 01:21:29,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:21:29,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:21:29,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:21:29,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:21:29,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:21:29,416 INFO L87 Difference]: Start difference. First operand 125 states and 134 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:21:29,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:29,531 INFO L93 Difference]: Finished difference Result 130 states and 141 transitions. [2021-12-07 01:21:29,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:21:29,532 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-12-07 01:21:29,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:29,533 INFO L225 Difference]: With dead ends: 130 [2021-12-07 01:21:29,533 INFO L226 Difference]: Without dead ends: 130 [2021-12-07 01:21:29,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:21:29,534 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 13 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:29,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 289 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:21:29,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-07 01:21:29,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2021-12-07 01:21:29,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 71 states have (on average 1.8450704225352113) internal successors, (131), 122 states have internal predecessors, (131), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 01:21:29,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 139 transitions. [2021-12-07 01:21:29,539 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 139 transitions. Word has length 29 [2021-12-07 01:21:29,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:29,540 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 139 transitions. [2021-12-07 01:21:29,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:21:29,540 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 139 transitions. [2021-12-07 01:21:29,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-07 01:21:29,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:29,541 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:29,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 01:21:29,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:21:29,742 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:21:29,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:29,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1251839469, now seen corresponding path program 1 times [2021-12-07 01:21:29,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:21:29,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083570292] [2021-12-07 01:21:29,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:29,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:21:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:29,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:21:29,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:29,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-07 01:21:29,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:29,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:21:29,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:21:29,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083570292] [2021-12-07 01:21:29,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083570292] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:21:29,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088201455] [2021-12-07 01:21:29,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:29,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:21:29,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:21:29,849 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:21:29,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 01:21:29,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:29,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-07 01:21:29,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:21:30,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:21:30,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:21:30,052 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:21:30,052 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 19 treesize of output 23 [2021-12-07 01:21:30,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:21:30,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088201455] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:21:30,162 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:21:30,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2021-12-07 01:21:30,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927310913] [2021-12-07 01:21:30,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:21:30,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-07 01:21:30,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:21:30,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-07 01:21:30,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-12-07 01:21:30,163 INFO L87 Difference]: Start difference. First operand 128 states and 139 transitions. Second operand has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-07 01:21:30,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:30,329 INFO L93 Difference]: Finished difference Result 135 states and 147 transitions. [2021-12-07 01:21:30,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 01:21:30,329 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2021-12-07 01:21:30,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:30,330 INFO L225 Difference]: With dead ends: 135 [2021-12-07 01:21:30,330 INFO L226 Difference]: Without dead ends: 135 [2021-12-07 01:21:30,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-12-07 01:21:30,331 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 26 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:30,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 1202 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:21:30,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-07 01:21:30,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 128. [2021-12-07 01:21:30,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 71 states have (on average 1.8309859154929577) internal successors, (130), 122 states have internal predecessors, (130), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 01:21:30,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 138 transitions. [2021-12-07 01:21:30,335 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 138 transitions. Word has length 29 [2021-12-07 01:21:30,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:30,335 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 138 transitions. [2021-12-07 01:21:30,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-07 01:21:30,335 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 138 transitions. [2021-12-07 01:21:30,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-07 01:21:30,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:30,336 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:30,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 01:21:30,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-07 01:21:30,537 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:21:30,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:30,538 INFO L85 PathProgramCache]: Analyzing trace with hash -152317901, now seen corresponding path program 1 times [2021-12-07 01:21:30,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:21:30,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042158967] [2021-12-07 01:21:30,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:30,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:21:30,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:30,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:21:30,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:30,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-07 01:21:30,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:30,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 01:21:30,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:21:30,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042158967] [2021-12-07 01:21:30,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042158967] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:21:30,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:21:30,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-07 01:21:30,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355125780] [2021-12-07 01:21:30,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:21:30,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 01:21:30,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:21:30,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 01:21:30,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:21:30,645 INFO L87 Difference]: Start difference. First operand 128 states and 138 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:21:30,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:30,826 INFO L93 Difference]: Finished difference Result 128 states and 138 transitions. [2021-12-07 01:21:30,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:21:30,826 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-12-07 01:21:30,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:30,827 INFO L225 Difference]: With dead ends: 128 [2021-12-07 01:21:30,827 INFO L226 Difference]: Without dead ends: 128 [2021-12-07 01:21:30,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:21:30,828 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 23 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:30,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 438 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:21:30,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-07 01:21:30,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-12-07 01:21:30,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 71 states have (on average 1.8169014084507042) internal successors, (129), 121 states have internal predecessors, (129), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 01:21:30,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 137 transitions. [2021-12-07 01:21:30,831 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 137 transitions. Word has length 30 [2021-12-07 01:21:30,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:30,832 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 137 transitions. [2021-12-07 01:21:30,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:21:30,832 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 137 transitions. [2021-12-07 01:21:30,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-07 01:21:30,832 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:30,832 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:30,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-07 01:21:30,833 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:21:30,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:30,833 INFO L85 PathProgramCache]: Analyzing trace with hash -152317900, now seen corresponding path program 1 times [2021-12-07 01:21:30,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:21:30,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595319998] [2021-12-07 01:21:30,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:30,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:21:30,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:30,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:21:30,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:30,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-07 01:21:30,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:30,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:21:30,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:21:30,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595319998] [2021-12-07 01:21:30,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595319998] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:21:30,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:21:30,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-07 01:21:30,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542885996] [2021-12-07 01:21:30,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:21:30,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 01:21:30,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:21:30,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 01:21:30,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:21:30,921 INFO L87 Difference]: Start difference. First operand 127 states and 137 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:21:31,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:31,095 INFO L93 Difference]: Finished difference Result 126 states and 136 transitions. [2021-12-07 01:21:31,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:21:31,095 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-12-07 01:21:31,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:31,096 INFO L225 Difference]: With dead ends: 126 [2021-12-07 01:21:31,096 INFO L226 Difference]: Without dead ends: 126 [2021-12-07 01:21:31,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:21:31,097 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 20 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:31,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 468 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:21:31,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-07 01:21:31,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-12-07 01:21:31,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 71 states have (on average 1.8028169014084507) internal successors, (128), 120 states have internal predecessors, (128), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 01:21:31,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 136 transitions. [2021-12-07 01:21:31,100 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 136 transitions. Word has length 30 [2021-12-07 01:21:31,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:31,100 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 136 transitions. [2021-12-07 01:21:31,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:21:31,100 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 136 transitions. [2021-12-07 01:21:31,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-07 01:21:31,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:31,101 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:31,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-07 01:21:31,101 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:21:31,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:31,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1115824007, now seen corresponding path program 1 times [2021-12-07 01:21:31,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:21:31,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705795712] [2021-12-07 01:21:31,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:31,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:21:31,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:31,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:21:31,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:31,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-07 01:21:31,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:31,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-07 01:21:31,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:31,160 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 01:21:31,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:21:31,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705795712] [2021-12-07 01:21:31,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705795712] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:21:31,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421729174] [2021-12-07 01:21:31,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:31,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:21:31,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:21:31,161 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:21:31,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 01:21:31,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:31,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 01:21:31,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:21:31,299 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 01:21:31,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:21:31,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421729174] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:21:31,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:21:31,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2021-12-07 01:21:31,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104549574] [2021-12-07 01:21:31,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:21:31,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:21:31,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:21:31,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:21:31,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:21:31,300 INFO L87 Difference]: Start difference. First operand 126 states and 136 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:21:31,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:31,308 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2021-12-07 01:21:31,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:21:31,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2021-12-07 01:21:31,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:31,309 INFO L225 Difference]: With dead ends: 114 [2021-12-07 01:21:31,310 INFO L226 Difference]: Without dead ends: 114 [2021-12-07 01:21:31,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:21:31,310 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 98 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:31,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 144 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:21:31,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-07 01:21:31,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-12-07 01:21:31,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 64 states have (on average 1.78125) internal successors, (114), 109 states have internal predecessors, (114), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:21:31,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 120 transitions. [2021-12-07 01:21:31,313 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 120 transitions. Word has length 41 [2021-12-07 01:21:31,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:31,314 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 120 transitions. [2021-12-07 01:21:31,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:21:31,314 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 120 transitions. [2021-12-07 01:21:31,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-07 01:21:31,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:31,314 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:31,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 01:21:31,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:21:31,515 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:21:31,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:31,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1638195673, now seen corresponding path program 1 times [2021-12-07 01:21:31,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:21:31,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156501482] [2021-12-07 01:21:31,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:31,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:21:31,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:31,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:21:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:31,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-07 01:21:31,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:31,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-07 01:21:31,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:31,708 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-07 01:21:31,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:21:31,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156501482] [2021-12-07 01:21:31,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156501482] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:21:31,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641339330] [2021-12-07 01:21:31,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:31,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:21:31,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:21:31,710 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:21:31,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 01:21:31,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:31,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 01:21:31,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:21:31,830 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 [2021-12-07 01:21:31,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:21:31,964 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: line 103291 column 46: unknown constant v_#valid_BEFORE_CALL_6 [2021-12-07 01:21:31,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:21:31,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-12-07 01:21:31,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849678720] [2021-12-07 01:21:31,964 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:21:31,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 01:21:31,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:21:31,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 01:21:31,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-07 01:21:31,965 INFO L87 Difference]: Start difference. First operand 114 states and 120 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:21:31,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 01:21:31,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-07 01:21:31,966 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:31,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:21:31,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 01:21:32,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:21:32,168 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@5a7ce7a4 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) 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:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) 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) [2021-12-07 01:21:32,170 INFO L158 Benchmark]: Toolchain (without parser) took 7977.72ms. Allocated memory was 119.5MB in the beginning and 144.7MB in the end (delta: 25.2MB). Free memory was 81.9MB in the beginning and 96.8MB in the end (delta: -14.8MB). Peak memory consumption was 9.6MB. Max. memory is 16.1GB. [2021-12-07 01:21:32,171 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 119.5MB. Free memory is still 99.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 01:21:32,171 INFO L158 Benchmark]: CACSL2BoogieTranslator took 312.43ms. Allocated memory is still 119.5MB. Free memory was 81.7MB in the beginning and 88.5MB in the end (delta: -6.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-07 01:21:32,171 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.71ms. Allocated memory is still 119.5MB. Free memory was 88.0MB in the beginning and 85.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-07 01:21:32,171 INFO L158 Benchmark]: Boogie Preprocessor took 22.98ms. Allocated memory is still 119.5MB. Free memory was 85.9MB in the beginning and 84.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-07 01:21:32,171 INFO L158 Benchmark]: RCFGBuilder took 417.93ms. Allocated memory is still 119.5MB. Free memory was 84.3MB in the beginning and 63.9MB in the end (delta: 20.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-12-07 01:21:32,172 INFO L158 Benchmark]: TraceAbstraction took 7185.20ms. Allocated memory was 119.5MB in the beginning and 144.7MB in the end (delta: 25.2MB). Free memory was 63.3MB in the beginning and 96.8MB in the end (delta: -33.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 01:21:32,173 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 119.5MB. Free memory is still 99.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 312.43ms. Allocated memory is still 119.5MB. Free memory was 81.7MB in the beginning and 88.5MB in the end (delta: -6.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.71ms. Allocated memory is still 119.5MB. Free memory was 88.0MB in the beginning and 85.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.98ms. Allocated memory is still 119.5MB. Free memory was 85.9MB in the beginning and 84.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 417.93ms. Allocated memory is still 119.5MB. Free memory was 84.3MB in the beginning and 63.9MB in the end (delta: 20.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 7185.20ms. Allocated memory was 119.5MB in the beginning and 144.7MB in the end (delta: 25.2MB). Free memory was 63.3MB in the beginning and 96.8MB in the end (delta: -33.5MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@5a7ce7a4 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@5a7ce7a4: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-07 01:21:32,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 1 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_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e0e4fff172a515598d076941b225a1a1f31b97f5ac14127a866784b10a4e3537 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 01:21:33,733 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 01:21:33,735 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 01:21:33,757 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 01:21:33,758 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 01:21:33,759 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 01:21:33,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 01:21:33,762 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 01:21:33,763 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 01:21:33,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 01:21:33,765 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 01:21:33,766 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 01:21:33,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 01:21:33,767 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 01:21:33,768 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 01:21:33,769 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 01:21:33,770 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 01:21:33,771 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 01:21:33,772 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 01:21:33,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 01:21:33,776 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 01:21:33,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 01:21:33,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 01:21:33,779 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 01:21:33,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 01:21:33,782 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 01:21:33,782 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 01:21:33,783 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 01:21:33,783 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 01:21:33,784 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 01:21:33,784 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 01:21:33,785 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 01:21:33,786 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 01:21:33,786 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 01:21:33,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 01:21:33,787 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 01:21:33,788 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 01:21:33,788 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 01:21:33,788 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 01:21:33,789 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 01:21:33,789 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 01:21:33,790 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-07 01:21:33,808 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 01:21:33,808 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 01:21:33,809 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 01:21:33,809 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 01:21:33,809 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 01:21:33,809 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 01:21:33,810 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 01:21:33,810 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 01:21:33,810 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 01:21:33,810 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 01:21:33,810 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 01:21:33,810 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-07 01:21:33,810 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 01:21:33,811 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 01:21:33,811 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 01:21:33,811 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-07 01:21:33,811 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-07 01:21:33,811 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-07 01:21:33,811 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 01:21:33,811 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-07 01:21:33,811 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-07 01:21:33,811 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-07 01:21:33,812 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 01:21:33,812 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 01:21:33,812 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 01:21:33,812 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 01:21:33,812 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 01:21:33,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:21:33,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 01:21:33,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 01:21:33,812 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-07 01:21:33,813 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-07 01:21:33,813 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 01:21:33,813 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-07 01:21:33,813 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_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0e4fff172a515598d076941b225a1a1f31b97f5ac14127a866784b10a4e3537 [2021-12-07 01:21:34,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 01:21:34,063 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 01:21:34,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 01:21:34,065 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 01:21:34,066 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 01:21:34,067 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2021-12-07 01:21:34,109 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/data/fdf4b8078/897498048e6945fe8c08f8d1c8c41d67/FLAG3dfd311dd [2021-12-07 01:21:34,537 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 01:21:34,537 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2021-12-07 01:21:34,549 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/data/fdf4b8078/897498048e6945fe8c08f8d1c8c41d67/FLAG3dfd311dd [2021-12-07 01:21:34,562 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/data/fdf4b8078/897498048e6945fe8c08f8d1c8c41d67 [2021-12-07 01:21:34,564 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 01:21:34,565 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 01:21:34,567 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 01:21:34,567 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 01:21:34,570 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 01:21:34,571 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:21:34" (1/1) ... [2021-12-07 01:21:34,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a03a8bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:34, skipping insertion in model container [2021-12-07 01:21:34,572 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:21:34" (1/1) ... [2021-12-07 01:21:34,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 01:21:34,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 01:21:34,839 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i[24640,24653] [2021-12-07 01:21:34,841 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:21:34,853 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 01:21:34,898 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i[24640,24653] [2021-12-07 01:21:34,899 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:21:34,931 INFO L208 MainTranslator]: Completed translation [2021-12-07 01:21:34,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:34 WrapperNode [2021-12-07 01:21:34,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 01:21:34,932 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 01:21:34,932 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 01:21:34,933 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 01:21:34,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:34" (1/1) ... [2021-12-07 01:21:34,958 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:34" (1/1) ... [2021-12-07 01:21:34,983 INFO L137 Inliner]: procedures = 130, calls = 47, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 141 [2021-12-07 01:21:34,984 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 01:21:34,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 01:21:34,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 01:21:34,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 01:21:34,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:34" (1/1) ... [2021-12-07 01:21:34,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:34" (1/1) ... [2021-12-07 01:21:34,998 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:34" (1/1) ... [2021-12-07 01:21:34,998 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:34" (1/1) ... [2021-12-07 01:21:35,009 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:34" (1/1) ... [2021-12-07 01:21:35,014 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:34" (1/1) ... [2021-12-07 01:21:35,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:34" (1/1) ... [2021-12-07 01:21:35,021 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 01:21:35,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 01:21:35,022 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 01:21:35,022 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 01:21:35,023 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:34" (1/1) ... [2021-12-07 01:21:35,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:21:35,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:21:35,051 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 01:21:35,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 01:21:35,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-07 01:21:35,088 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-12-07 01:21:35,088 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-12-07 01:21:35,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-07 01:21:35,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 01:21:35,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-07 01:21:35,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-07 01:21:35,089 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-07 01:21:35,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 01:21:35,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-07 01:21:35,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-07 01:21:35,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-07 01:21:35,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 01:21:35,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 01:21:35,169 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 01:21:35,170 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 01:21:35,590 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 01:21:35,598 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 01:21:35,598 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-07 01:21:35,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:21:35 BoogieIcfgContainer [2021-12-07 01:21:35,600 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 01:21:35,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 01:21:35,603 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 01:21:35,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 01:21:35,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:21:34" (1/3) ... [2021-12-07 01:21:35,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78c2b0e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:21:35, skipping insertion in model container [2021-12-07 01:21:35,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:34" (2/3) ... [2021-12-07 01:21:35,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78c2b0e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:21:35, skipping insertion in model container [2021-12-07 01:21:35,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:21:35" (3/3) ... [2021-12-07 01:21:35,608 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_prepend_equal.i [2021-12-07 01:21:35,613 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 01:21:35,614 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 60 error locations. [2021-12-07 01:21:35,647 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 01:21:35,652 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 [2021-12-07 01:21:35,652 INFO L340 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2021-12-07 01:21:35,664 INFO L276 IsEmpty]: Start isEmpty. Operand has 130 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 125 states have internal predecessors, (137), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:21:35,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-07 01:21:35,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:35,672 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-07 01:21:35,672 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:21:35,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:35,678 INFO L85 PathProgramCache]: Analyzing trace with hash 895303154, now seen corresponding path program 1 times [2021-12-07 01:21:35,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:21:35,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065242848] [2021-12-07 01:21:35,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:35,691 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:21:35,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:21:35,692 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:21:35,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-07 01:21:35,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:35,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:21:35,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:21:35,843 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 [2021-12-07 01:21:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:21:35,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:21:35,857 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:21:35,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065242848] [2021-12-07 01:21:35,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065242848] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:21:35,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:21:35,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:21:35,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355454369] [2021-12-07 01:21:35,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:21:35,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:21:35,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:21:35,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:21:35,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:21:35,899 INFO L87 Difference]: Start difference. First operand has 130 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 125 states have internal predecessors, (137), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:21:36,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:36,119 INFO L93 Difference]: Finished difference Result 127 states and 136 transitions. [2021-12-07 01:21:36,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:21:36,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-07 01:21:36,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:36,128 INFO L225 Difference]: With dead ends: 127 [2021-12-07 01:21:36,128 INFO L226 Difference]: Without dead ends: 124 [2021-12-07 01:21:36,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:21:36,132 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 10 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:36,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 193 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:21:36,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-07 01:21:36,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-12-07 01:21:36,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 63 states have (on average 2.0) internal successors, (126), 119 states have internal predecessors, (126), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:21:36,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 132 transitions. [2021-12-07 01:21:36,167 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 132 transitions. Word has length 6 [2021-12-07 01:21:36,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:36,167 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 132 transitions. [2021-12-07 01:21:36,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:21:36,167 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 132 transitions. [2021-12-07 01:21:36,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-07 01:21:36,168 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:36,168 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-07 01:21:36,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-07 01:21:36,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:21:36,370 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:21:36,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:36,372 INFO L85 PathProgramCache]: Analyzing trace with hash 895303155, now seen corresponding path program 1 times [2021-12-07 01:21:36,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:21:36,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1641652516] [2021-12-07 01:21:36,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:36,375 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:21:36,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:21:36,378 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:21:36,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-07 01:21:36,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:36,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:21:36,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:21:36,564 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 [2021-12-07 01:21:36,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:21:36,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:21:36,586 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:21:36,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1641652516] [2021-12-07 01:21:36,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1641652516] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:21:36,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:21:36,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:21:36,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430887131] [2021-12-07 01:21:36,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:21:36,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:21:36,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:21:36,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:21:36,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:21:36,590 INFO L87 Difference]: Start difference. First operand 124 states and 132 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:21:36,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:36,818 INFO L93 Difference]: Finished difference Result 121 states and 129 transitions. [2021-12-07 01:21:36,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:21:36,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-07 01:21:36,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:36,820 INFO L225 Difference]: With dead ends: 121 [2021-12-07 01:21:36,820 INFO L226 Difference]: Without dead ends: 121 [2021-12-07 01:21:36,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:21:36,822 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 5 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:36,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 195 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:21:36,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-07 01:21:36,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-12-07 01:21:36,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 63 states have (on average 1.9523809523809523) internal successors, (123), 116 states have internal predecessors, (123), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:21:36,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 129 transitions. [2021-12-07 01:21:36,831 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 129 transitions. Word has length 6 [2021-12-07 01:21:36,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:36,832 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 129 transitions. [2021-12-07 01:21:36,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:21:36,832 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 129 transitions. [2021-12-07 01:21:36,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-07 01:21:36,832 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:36,832 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:36,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-07 01:21:37,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:21:37,034 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:21:37,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:37,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1495162356, now seen corresponding path program 1 times [2021-12-07 01:21:37,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:21:37,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1947036502] [2021-12-07 01:21:37,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:37,040 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:21:37,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:21:37,043 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:21:37,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-07 01:21:37,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:37,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:21:37,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:21:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:21:37,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:21:37,261 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:21:37,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1947036502] [2021-12-07 01:21:37,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1947036502] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:21:37,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:21:37,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:21:37,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823341680] [2021-12-07 01:21:37,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:21:37,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:21:37,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:21:37,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:21:37,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:21:37,263 INFO L87 Difference]: Start difference. First operand 121 states and 129 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-07 01:21:37,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:37,272 INFO L93 Difference]: Finished difference Result 132 states and 142 transitions. [2021-12-07 01:21:37,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:21:37,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-07 01:21:37,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:37,274 INFO L225 Difference]: With dead ends: 132 [2021-12-07 01:21:37,274 INFO L226 Difference]: Without dead ends: 132 [2021-12-07 01:21:37,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:21:37,275 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 10 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:37,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 251 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:21:37,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-07 01:21:37,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 122. [2021-12-07 01:21:37,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 64 states have (on average 1.9375) internal successors, (124), 117 states have internal predecessors, (124), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:21:37,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 130 transitions. [2021-12-07 01:21:37,289 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 130 transitions. Word has length 14 [2021-12-07 01:21:37,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:37,290 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 130 transitions. [2021-12-07 01:21:37,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-07 01:21:37,290 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 130 transitions. [2021-12-07 01:21:37,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-07 01:21:37,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:37,291 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:37,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-07 01:21:37,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:21:37,493 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:21:37,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:37,495 INFO L85 PathProgramCache]: Analyzing trace with hash 2091192736, now seen corresponding path program 1 times [2021-12-07 01:21:37,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:21:37,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1577345194] [2021-12-07 01:21:37,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:37,498 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:21:37,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:21:37,501 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:21:37,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-07 01:21:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:37,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 01:21:37,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:21:37,704 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 [2021-12-07 01:21:37,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:21:37,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:21:37,741 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:21:37,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1577345194] [2021-12-07 01:21:37,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1577345194] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:21:37,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:21:37,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:21:37,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744734314] [2021-12-07 01:21:37,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:21:37,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:21:37,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:21:37,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:21:37,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:21:37,744 INFO L87 Difference]: Start difference. First operand 122 states and 130 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:21:38,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:38,169 INFO L93 Difference]: Finished difference Result 122 states and 131 transitions. [2021-12-07 01:21:38,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:21:38,170 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-12-07 01:21:38,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:38,173 INFO L225 Difference]: With dead ends: 122 [2021-12-07 01:21:38,173 INFO L226 Difference]: Without dead ends: 122 [2021-12-07 01:21:38,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:21:38,174 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 20 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:38,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 357 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 01:21:38,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-07 01:21:38,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2021-12-07 01:21:38,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 64 states have (on average 1.921875) internal successors, (123), 116 states have internal predecessors, (123), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:21:38,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 129 transitions. [2021-12-07 01:21:38,180 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 129 transitions. Word has length 24 [2021-12-07 01:21:38,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:38,181 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 129 transitions. [2021-12-07 01:21:38,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:21:38,181 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 129 transitions. [2021-12-07 01:21:38,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-07 01:21:38,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:38,182 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:38,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-07 01:21:38,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:21:38,383 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:21:38,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:38,385 INFO L85 PathProgramCache]: Analyzing trace with hash 2091192737, now seen corresponding path program 1 times [2021-12-07 01:21:38,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:21:38,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [384899900] [2021-12-07 01:21:38,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:38,388 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:21:38,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:21:38,390 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:21:38,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-07 01:21:38,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:38,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-07 01:21:38,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:21:38,482 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 [2021-12-07 01:21:38,553 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:21:38,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:21:38,553 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:21:38,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [384899900] [2021-12-07 01:21:38,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [384899900] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:21:38,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:21:38,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:21:38,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631190234] [2021-12-07 01:21:38,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:21:38,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:21:38,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:21:38,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:21:38,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:21:38,555 INFO L87 Difference]: Start difference. First operand 121 states and 129 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:21:39,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:39,018 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2021-12-07 01:21:39,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:21:39,018 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-12-07 01:21:39,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:39,019 INFO L225 Difference]: With dead ends: 121 [2021-12-07 01:21:39,019 INFO L226 Difference]: Without dead ends: 121 [2021-12-07 01:21:39,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:21:39,020 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 19 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:39,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 381 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 01:21:39,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-07 01:21:39,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2021-12-07 01:21:39,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 64 states have (on average 1.90625) internal successors, (122), 115 states have internal predecessors, (122), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:21:39,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 128 transitions. [2021-12-07 01:21:39,029 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 128 transitions. Word has length 24 [2021-12-07 01:21:39,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:39,030 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 128 transitions. [2021-12-07 01:21:39,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:21:39,030 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 128 transitions. [2021-12-07 01:21:39,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-07 01:21:39,031 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:39,031 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:39,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-07 01:21:39,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:21:39,232 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:21:39,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:39,234 INFO L85 PathProgramCache]: Analyzing trace with hash -408475519, now seen corresponding path program 1 times [2021-12-07 01:21:39,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:21:39,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1684170424] [2021-12-07 01:21:39,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:39,237 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:21:39,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:21:39,238 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:21:39,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-07 01:21:39,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:39,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-07 01:21:39,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:21:39,350 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 [2021-12-07 01:21:39,492 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:21:39,492 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 24 treesize of output 31 [2021-12-07 01:21:39,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:21:39,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:21:41,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:21:41,810 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:21:41,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1684170424] [2021-12-07 01:21:41,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1684170424] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:21:41,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:21:41,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-12-07 01:21:41,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492199018] [2021-12-07 01:21:41,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:21:41,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 01:21:41,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:21:41,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 01:21:41,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=54, Unknown=1, NotChecked=0, Total=72 [2021-12-07 01:21:41,812 INFO L87 Difference]: Start difference. First operand 120 states and 128 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:21:42,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:42,249 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions. [2021-12-07 01:21:42,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 01:21:42,249 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-12-07 01:21:42,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:42,250 INFO L225 Difference]: With dead ends: 135 [2021-12-07 01:21:42,250 INFO L226 Difference]: Without dead ends: 135 [2021-12-07 01:21:42,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=34, Invalid=97, Unknown=1, NotChecked=0, Total=132 [2021-12-07 01:21:42,251 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 7 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:42,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 403 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 279 Invalid, 0 Unknown, 81 Unchecked, 0.4s Time] [2021-12-07 01:21:42,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-07 01:21:42,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2021-12-07 01:21:42,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 75 states have (on average 1.8) internal successors, (135), 126 states have internal predecessors, (135), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 01:21:42,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2021-12-07 01:21:42,257 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 26 [2021-12-07 01:21:42,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:42,257 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2021-12-07 01:21:42,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:21:42,257 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2021-12-07 01:21:42,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-07 01:21:42,258 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:42,258 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:42,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-07 01:21:42,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:21:42,459 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:21:42,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:42,459 INFO L85 PathProgramCache]: Analyzing trace with hash -408475518, now seen corresponding path program 1 times [2021-12-07 01:21:42,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:21:42,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1804220101] [2021-12-07 01:21:42,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:42,460 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:21:42,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:21:42,460 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:21:42,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-07 01:21:42,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:42,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-07 01:21:42,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:21:42,577 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 [2021-12-07 01:21:42,581 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 [2021-12-07 01:21:44,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:21:44,809 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 12 treesize of output 14 [2021-12-07 01:21:44,816 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:21:44,817 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 17 treesize of output 17 [2021-12-07 01:21:44,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:21:44,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:21:45,123 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:21:45,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1804220101] [2021-12-07 01:21:45,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1804220101] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:21:45,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [153516306] [2021-12-07 01:21:45,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:45,124 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:21:45,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:21:45,125 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:21:45,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-12-07 01:21:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:45,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-07 01:21:45,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:21:45,315 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 [2021-12-07 01:21:45,321 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 [2021-12-07 01:21:45,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:21:45,494 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 12 treesize of output 14 [2021-12-07 01:21:45,502 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:21:45,502 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 18 treesize of output 18 [2021-12-07 01:21:45,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:21:45,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:21:45,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [153516306] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:21:45,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:21:45,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-12-07 01:21:45,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34593436] [2021-12-07 01:21:45,719 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:21:45,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 01:21:45,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:21:45,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 01:21:45,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=86, Unknown=1, NotChecked=0, Total=110 [2021-12-07 01:21:45,720 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:21:46,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:46,412 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions. [2021-12-07 01:21:46,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:21:46,413 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-12-07 01:21:46,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:46,414 INFO L225 Difference]: With dead ends: 135 [2021-12-07 01:21:46,414 INFO L226 Difference]: Without dead ends: 135 [2021-12-07 01:21:46,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=31, Invalid=124, Unknown=1, NotChecked=0, Total=156 [2021-12-07 01:21:46,415 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 3 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:46,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 405 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 383 Invalid, 0 Unknown, 78 Unchecked, 0.6s Time] [2021-12-07 01:21:46,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-07 01:21:46,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2021-12-07 01:21:46,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 75 states have (on average 1.7866666666666666) internal successors, (134), 126 states have internal predecessors, (134), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 01:21:46,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 142 transitions. [2021-12-07 01:21:46,420 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 142 transitions. Word has length 26 [2021-12-07 01:21:46,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:46,420 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 142 transitions. [2021-12-07 01:21:46,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:21:46,420 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 142 transitions. [2021-12-07 01:21:46,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-07 01:21:46,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:46,421 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:46,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-07 01:21:46,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-12-07 01:21:46,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 01:21:46,822 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:21:46,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:46,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1702795689, now seen corresponding path program 1 times [2021-12-07 01:21:46,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:21:46,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [314374733] [2021-12-07 01:21:46,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:46,826 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:21:46,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:21:46,828 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:21:46,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-07 01:21:46,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:46,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 01:21:46,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:21:46,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:21:46,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:21:47,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:21:47,043 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:21:47,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [314374733] [2021-12-07 01:21:47,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [314374733] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:21:47,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:21:47,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-12-07 01:21:47,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890793187] [2021-12-07 01:21:47,043 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:21:47,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:21:47,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:21:47,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:21:47,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:21:47,044 INFO L87 Difference]: Start difference. First operand 133 states and 142 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:21:47,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:47,174 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2021-12-07 01:21:47,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:21:47,175 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-12-07 01:21:47,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:47,176 INFO L225 Difference]: With dead ends: 134 [2021-12-07 01:21:47,176 INFO L226 Difference]: Without dead ends: 134 [2021-12-07 01:21:47,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:21:47,176 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 4 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:47,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 579 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:21:47,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-07 01:21:47,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2021-12-07 01:21:47,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 75 states have (on average 1.7733333333333334) internal successors, (133), 126 states have internal predecessors, (133), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 01:21:47,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 141 transitions. [2021-12-07 01:21:47,181 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 141 transitions. Word has length 28 [2021-12-07 01:21:47,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:47,181 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 141 transitions. [2021-12-07 01:21:47,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:21:47,181 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 141 transitions. [2021-12-07 01:21:47,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-07 01:21:47,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:47,182 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:47,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-07 01:21:47,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:21:47,384 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:21:47,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:47,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1251839470, now seen corresponding path program 1 times [2021-12-07 01:21:47,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:21:47,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [787905307] [2021-12-07 01:21:47,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:47,387 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:21:47,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:21:47,389 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:21:47,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-07 01:21:47,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:47,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:21:47,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:21:47,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 01:21:47,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:21:47,626 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-07 01:21:47,626 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 21 treesize of output 20 [2021-12-07 01:21:47,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 01:21:47,657 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:21:47,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [787905307] [2021-12-07 01:21:47,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [787905307] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:21:47,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:21:47,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-12-07 01:21:47,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142144237] [2021-12-07 01:21:47,658 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:21:47,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:21:47,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:21:47,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:21:47,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:21:47,659 INFO L87 Difference]: Start difference. First operand 133 states and 141 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:21:47,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:47,880 INFO L93 Difference]: Finished difference Result 138 states and 148 transitions. [2021-12-07 01:21:47,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:21:47,881 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2021-12-07 01:21:47,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:47,882 INFO L225 Difference]: With dead ends: 138 [2021-12-07 01:21:47,882 INFO L226 Difference]: Without dead ends: 138 [2021-12-07 01:21:47,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:21:47,882 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 9 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:47,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 297 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:21:47,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-07 01:21:47,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2021-12-07 01:21:47,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 78 states have (on average 1.7692307692307692) internal successors, (138), 129 states have internal predecessors, (138), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 01:21:47,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 146 transitions. [2021-12-07 01:21:47,886 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 146 transitions. Word has length 29 [2021-12-07 01:21:47,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:47,886 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 146 transitions. [2021-12-07 01:21:47,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:21:47,887 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 146 transitions. [2021-12-07 01:21:47,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-07 01:21:47,887 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:47,887 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:47,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-12-07 01:21:48,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:21:48,089 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:21:48,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:48,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1251839469, now seen corresponding path program 1 times [2021-12-07 01:21:48,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:21:48,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1000233068] [2021-12-07 01:21:48,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:48,092 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:21:48,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:21:48,095 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:21:48,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-07 01:21:48,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:48,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-07 01:21:48,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:21:48,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:21:48,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:21:48,452 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:21:48,452 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 22 treesize of output 26 [2021-12-07 01:21:48,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:21:48,934 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:21:48,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1000233068] [2021-12-07 01:21:48,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1000233068] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:21:48,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:21:48,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-12-07 01:21:48,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480997248] [2021-12-07 01:21:48,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:21:48,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-07 01:21:48,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:21:48,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 01:21:48,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-07 01:21:48,936 INFO L87 Difference]: Start difference. First operand 136 states and 146 transitions. Second operand has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-07 01:21:49,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:49,848 INFO L93 Difference]: Finished difference Result 143 states and 154 transitions. [2021-12-07 01:21:49,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 01:21:49,849 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2021-12-07 01:21:49,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:49,850 INFO L225 Difference]: With dead ends: 143 [2021-12-07 01:21:49,850 INFO L226 Difference]: Without dead ends: 143 [2021-12-07 01:21:49,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-12-07 01:21:49,851 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 17 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:49,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 1059 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-07 01:21:49,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-07 01:21:49,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 136. [2021-12-07 01:21:49,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 78 states have (on average 1.7564102564102564) internal successors, (137), 129 states have internal predecessors, (137), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 01:21:49,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 145 transitions. [2021-12-07 01:21:49,855 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 145 transitions. Word has length 29 [2021-12-07 01:21:49,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:49,855 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 145 transitions. [2021-12-07 01:21:49,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-07 01:21:49,855 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 145 transitions. [2021-12-07 01:21:49,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-07 01:21:49,856 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:49,856 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:49,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-07 01:21:50,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:21:50,057 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:21:50,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:50,058 INFO L85 PathProgramCache]: Analyzing trace with hash -152317901, now seen corresponding path program 1 times [2021-12-07 01:21:50,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:21:50,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1350399113] [2021-12-07 01:21:50,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:50,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:21:50,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:21:50,062 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:21:50,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-07 01:21:50,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:50,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:21:50,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:21:50,172 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 [2021-12-07 01:21:50,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:21:50,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:21:50,222 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:21:50,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1350399113] [2021-12-07 01:21:50,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1350399113] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:21:50,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:21:50,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-07 01:21:50,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831407142] [2021-12-07 01:21:50,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:21:50,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 01:21:50,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:21:50,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 01:21:50,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:21:50,224 INFO L87 Difference]: Start difference. First operand 136 states and 145 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:21:50,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:50,758 INFO L93 Difference]: Finished difference Result 136 states and 145 transitions. [2021-12-07 01:21:50,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:21:50,758 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-12-07 01:21:50,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:50,759 INFO L225 Difference]: With dead ends: 136 [2021-12-07 01:21:50,759 INFO L226 Difference]: Without dead ends: 136 [2021-12-07 01:21:50,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:21:50,760 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 22 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:50,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 402 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 01:21:50,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-07 01:21:50,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2021-12-07 01:21:50,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 78 states have (on average 1.7435897435897436) internal successors, (136), 128 states have internal predecessors, (136), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 01:21:50,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 144 transitions. [2021-12-07 01:21:50,765 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 144 transitions. Word has length 30 [2021-12-07 01:21:50,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:50,765 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 144 transitions. [2021-12-07 01:21:50,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:21:50,766 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 144 transitions. [2021-12-07 01:21:50,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-07 01:21:50,766 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:50,766 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:50,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-07 01:21:50,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:21:50,967 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:21:50,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:50,968 INFO L85 PathProgramCache]: Analyzing trace with hash -152317900, now seen corresponding path program 1 times [2021-12-07 01:21:50,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:21:50,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1724356377] [2021-12-07 01:21:50,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:50,970 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:21:50,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:21:50,973 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:21:50,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-07 01:21:51,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:51,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-07 01:21:51,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:21:51,130 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 [2021-12-07 01:21:51,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:21:51,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:21:51,218 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:21:51,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1724356377] [2021-12-07 01:21:51,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1724356377] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:21:51,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:21:51,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-07 01:21:51,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730027852] [2021-12-07 01:21:51,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:21:51,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 01:21:51,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:21:51,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 01:21:51,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:21:51,219 INFO L87 Difference]: Start difference. First operand 135 states and 144 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:21:51,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:51,826 INFO L93 Difference]: Finished difference Result 134 states and 143 transitions. [2021-12-07 01:21:51,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:21:51,827 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-12-07 01:21:51,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:51,828 INFO L225 Difference]: With dead ends: 134 [2021-12-07 01:21:51,828 INFO L226 Difference]: Without dead ends: 134 [2021-12-07 01:21:51,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:21:51,829 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 20 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:51,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 432 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-07 01:21:51,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-07 01:21:51,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-12-07 01:21:51,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 78 states have (on average 1.7307692307692308) internal successors, (135), 127 states have internal predecessors, (135), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 01:21:51,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 143 transitions. [2021-12-07 01:21:51,832 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 143 transitions. Word has length 30 [2021-12-07 01:21:51,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:51,832 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 143 transitions. [2021-12-07 01:21:51,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:21:51,832 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 143 transitions. [2021-12-07 01:21:51,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-07 01:21:51,833 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:51,833 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:51,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-12-07 01:21:52,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:21:52,034 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:21:52,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:52,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1115824007, now seen corresponding path program 1 times [2021-12-07 01:21:52,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:21:52,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1800123574] [2021-12-07 01:21:52,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:52,034 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:21:52,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:21:52,035 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:21:52,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-07 01:21:52,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:52,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 01:21:52,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:21:52,175 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 01:21:52,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:21:52,235 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 01:21:52,236 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:21:52,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1800123574] [2021-12-07 01:21:52,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1800123574] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:21:52,236 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:21:52,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-07 01:21:52,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169493332] [2021-12-07 01:21:52,236 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:21:52,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:21:52,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:21:52,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:21:52,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:21:52,237 INFO L87 Difference]: Start difference. First operand 134 states and 143 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:21:52,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:52,254 INFO L93 Difference]: Finished difference Result 122 states and 127 transitions. [2021-12-07 01:21:52,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:21:52,255 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-12-07 01:21:52,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:52,255 INFO L225 Difference]: With dead ends: 122 [2021-12-07 01:21:52,255 INFO L226 Difference]: Without dead ends: 122 [2021-12-07 01:21:52,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:21:52,256 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 98 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:52,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 268 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:21:52,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-07 01:21:52,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-12-07 01:21:52,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 71 states have (on average 1.704225352112676) internal successors, (121), 116 states have internal predecessors, (121), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:21:52,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 127 transitions. [2021-12-07 01:21:52,259 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 127 transitions. Word has length 41 [2021-12-07 01:21:52,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:52,259 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 127 transitions. [2021-12-07 01:21:52,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:21:52,260 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 127 transitions. [2021-12-07 01:21:52,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-07 01:21:52,265 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:52,265 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:52,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-07 01:21:52,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:21:52,466 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:21:52,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:52,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1638195673, now seen corresponding path program 1 times [2021-12-07 01:21:52,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:21:52,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1971704118] [2021-12-07 01:21:52,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:52,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:21:52,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:21:52,471 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:21:52,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-07 01:21:52,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:52,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-07 01:21:52,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:21:52,712 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 [2021-12-07 01:21:52,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 01:21:52,825 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:21:52,825 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 24 treesize of output 31 [2021-12-07 01:21:52,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-07 01:21:52,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:21:52,946 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 16 treesize of output 18 [2021-12-07 01:21:53,171 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-07 01:21:53,172 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 19 treesize of output 24 [2021-12-07 01:21:53,200 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:21:53,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:21:53,454 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:21:53,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1971704118] [2021-12-07 01:21:53,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1971704118] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:21:53,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1981299808] [2021-12-07 01:21:53,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:53,455 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:21:53,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:21:53,455 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:21:53,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-12-07 01:21:53,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:53,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-07 01:21:53,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:21:53,735 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-07 01:21:53,735 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 14 treesize of output 19 [2021-12-07 01:21:53,774 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-07 01:21:53,774 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 20 treesize of output 16 [2021-12-07 01:21:53,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:21:53,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:21:53,875 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 01:21:53,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 35 [2021-12-07 01:21:53,969 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-07 01:21:53,969 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 29 treesize of output 25 [2021-12-07 01:21:54,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:21:54,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:21:54,174 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 01:21:54,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 44 [2021-12-07 01:21:54,696 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-07 01:21:54,696 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 26 [2021-12-07 01:21:54,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:21:54,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:21:54,821 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 01:21:54,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 46 [2021-12-07 01:21:55,175 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-07 01:21:55,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:21:55,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1981299808] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:21:55,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:21:55,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2021-12-07 01:21:55,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894082330] [2021-12-07 01:21:55,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:21:55,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-07 01:21:55,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:21:55,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-07 01:21:55,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-12-07 01:21:55,266 INFO L87 Difference]: Start difference. First operand 122 states and 127 transitions. Second operand has 20 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 01:22:03,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:22:03,930 INFO L93 Difference]: Finished difference Result 129 states and 133 transitions. [2021-12-07 01:22:03,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-07 01:22:03,930 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2021-12-07 01:22:03,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:22:03,931 INFO L225 Difference]: With dead ends: 129 [2021-12-07 01:22:03,931 INFO L226 Difference]: Without dead ends: 129 [2021-12-07 01:22:03,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-12-07 01:22:03,932 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 12 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 514 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:22:03,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 821 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 270 Invalid, 0 Unknown, 514 Unchecked, 0.4s Time] [2021-12-07 01:22:03,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-07 01:22:03,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-12-07 01:22:03,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 78 states have (on average 1.6282051282051282) internal successors, (127), 122 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:22:03,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2021-12-07 01:22:03,935 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 43 [2021-12-07 01:22:03,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:22:03,935 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2021-12-07 01:22:03,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 01:22:03,936 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2021-12-07 01:22:03,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-07 01:22:03,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:22:03,936 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:22:03,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-07 01:22:04,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-12-07 01:22:04,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 01:22:04,338 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:22:04,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:22:04,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1638195672, now seen corresponding path program 1 times [2021-12-07 01:22:04,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:22:04,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [336855090] [2021-12-07 01:22:04,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:22:04,342 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:22:04,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:22:04,343 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:22:04,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-07 01:22:04,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:22:04,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-07 01:22:04,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:22:04,620 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 [2021-12-07 01:22:04,625 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 [2021-12-07 01:22:04,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:22:04,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-12-07 01:22:06,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:22:06,782 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 12 treesize of output 14 [2021-12-07 01:22:06,791 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:22:06,791 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 20 treesize of output 20 [2021-12-07 01:22:06,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:22:08,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:22:08,964 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 12 treesize of output 14 [2021-12-07 01:22:09,188 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:22:09,189 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 [2021-12-07 01:22:09,255 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:22:09,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:22:09,506 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:22:09,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [336855090] [2021-12-07 01:22:09,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [336855090] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:22:09,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [615278495] [2021-12-07 01:22:09,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:22:09,506 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:22:09,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:22:09,507 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:22:09,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-12-07 01:22:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:22:09,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-07 01:22:09,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:22:09,825 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 [2021-12-07 01:22:09,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:22:09,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:22:09,950 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 12 treesize of output 14 [2021-12-07 01:22:10,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:22:12,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:22:12,246 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 12 treesize of output 14 [2021-12-07 01:22:12,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:22:12,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:22:12,674 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 12 treesize of output 14 [2021-12-07 01:22:12,695 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-07 01:22:12,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:22:12,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [615278495] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:22:12,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:22:12,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-12-07 01:22:12,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672114036] [2021-12-07 01:22:12,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:22:12,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-07 01:22:12,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:22:12,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-07 01:22:12,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=434, Unknown=3, NotChecked=0, Total=506 [2021-12-07 01:22:12,901 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand has 20 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 15 states have internal predecessors, (60), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 01:22:15,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:22:15,842 INFO L93 Difference]: Finished difference Result 128 states and 132 transitions. [2021-12-07 01:22:15,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 01:22:15,842 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 15 states have internal predecessors, (60), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2021-12-07 01:22:15,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:22:15,843 INFO L225 Difference]: With dead ends: 128 [2021-12-07 01:22:15,843 INFO L226 Difference]: Without dead ends: 128 [2021-12-07 01:22:15,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=112, Invalid=696, Unknown=4, NotChecked=0, Total=812 [2021-12-07 01:22:15,844 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 12 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 321 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:22:15,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 712 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 292 Invalid, 0 Unknown, 321 Unchecked, 0.6s Time] [2021-12-07 01:22:15,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-07 01:22:15,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-12-07 01:22:15,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 78 states have (on average 1.6153846153846154) internal successors, (126), 121 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:22:15,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2021-12-07 01:22:15,847 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 43 [2021-12-07 01:22:15,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:22:15,847 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2021-12-07 01:22:15,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 15 states have internal predecessors, (60), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 01:22:15,850 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2021-12-07 01:22:15,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-07 01:22:15,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:22:15,850 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:22:15,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-12-07 01:22:16,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-12-07 01:22:16,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:22:16,251 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:22:16,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:22:16,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1946956456, now seen corresponding path program 1 times [2021-12-07 01:22:16,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:22:16,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1671451757] [2021-12-07 01:22:16,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:22:16,255 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:22:16,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:22:16,256 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:22:16,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-07 01:22:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:22:16,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 01:22:16,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:22:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-07 01:22:16,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:22:16,430 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:22:16,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1671451757] [2021-12-07 01:22:16,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1671451757] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:22:16,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:22:16,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:22:16,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601972638] [2021-12-07 01:22:16,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:22:16,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:22:16,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:22:16,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:22:16,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:22:16,432 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-07 01:22:16,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:22:16,588 INFO L93 Difference]: Finished difference Result 142 states and 147 transitions. [2021-12-07 01:22:16,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:22:16,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-12-07 01:22:16,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:22:16,589 INFO L225 Difference]: With dead ends: 142 [2021-12-07 01:22:16,589 INFO L226 Difference]: Without dead ends: 142 [2021-12-07 01:22:16,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:22:16,590 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 80 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:22:16,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 102 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:22:16,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-07 01:22:16,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 124. [2021-12-07 01:22:16,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 78 states have (on average 1.564102564102564) internal successors, (122), 117 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:22:16,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2021-12-07 01:22:16,593 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 45 [2021-12-07 01:22:16,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:22:16,593 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2021-12-07 01:22:16,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-07 01:22:16,593 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2021-12-07 01:22:16,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-07 01:22:16,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:22:16,594 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:22:16,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-12-07 01:22:16,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:22:16,795 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:22:16,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:22:16,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1946956457, now seen corresponding path program 1 times [2021-12-07 01:22:16,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:22:16,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1123396201] [2021-12-07 01:22:16,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:22:16,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:22:16,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:22:16,800 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:22:16,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-07 01:22:16,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:22:16,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 01:22:16,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:22:17,039 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-07 01:22:17,039 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:22:17,039 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:22:17,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1123396201] [2021-12-07 01:22:17,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1123396201] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:22:17,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:22:17,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:22:17,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174651526] [2021-12-07 01:22:17,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:22:17,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:22:17,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:22:17,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:22:17,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:22:17,040 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:22:17,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:22:17,179 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2021-12-07 01:22:17,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:22:17,180 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2021-12-07 01:22:17,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:22:17,181 INFO L225 Difference]: With dead ends: 120 [2021-12-07 01:22:17,181 INFO L226 Difference]: Without dead ends: 120 [2021-12-07 01:22:17,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:22:17,181 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 244 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:22:17,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 114 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:22:17,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-07 01:22:17,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-12-07 01:22:17,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 78 states have (on average 1.5128205128205128) internal successors, (118), 113 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:22:17,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2021-12-07 01:22:17,184 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 45 [2021-12-07 01:22:17,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:22:17,184 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2021-12-07 01:22:17,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:22:17,184 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2021-12-07 01:22:17,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-07 01:22:17,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:22:17,185 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:22:17,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-12-07 01:22:17,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:22:17,386 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:22:17,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:22:17,387 INFO L85 PathProgramCache]: Analyzing trace with hash 226108014, now seen corresponding path program 1 times [2021-12-07 01:22:17,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:22:17,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196041739] [2021-12-07 01:22:17,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:22:17,389 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:22:17,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:22:17,391 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:22:17,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-07 01:22:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:22:17,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 01:22:17,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:22:17,681 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 [2021-12-07 01:22:17,715 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-07 01:22:17,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:22:17,715 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:22:17,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196041739] [2021-12-07 01:22:17,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1196041739] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:22:17,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:22:17,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:22:17,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360341448] [2021-12-07 01:22:17,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:22:17,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:22:17,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:22:17,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:22:17,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:22:17,717 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-07 01:22:18,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:22:18,160 INFO L93 Difference]: Finished difference Result 134 states and 139 transitions. [2021-12-07 01:22:18,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:22:18,160 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2021-12-07 01:22:18,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:22:18,161 INFO L225 Difference]: With dead ends: 134 [2021-12-07 01:22:18,161 INFO L226 Difference]: Without dead ends: 134 [2021-12-07 01:22:18,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:22:18,162 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 73 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:22:18,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 235 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 01:22:18,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-07 01:22:18,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 116. [2021-12-07 01:22:18,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 78 states have (on average 1.4615384615384615) internal successors, (114), 109 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:22:18,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2021-12-07 01:22:18,165 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 46 [2021-12-07 01:22:18,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:22:18,165 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2021-12-07 01:22:18,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-07 01:22:18,165 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2021-12-07 01:22:18,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-07 01:22:18,165 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:22:18,165 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:22:18,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-07 01:22:18,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:22:18,366 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:22:18,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:22:18,367 INFO L85 PathProgramCache]: Analyzing trace with hash 226108015, now seen corresponding path program 1 times [2021-12-07 01:22:18,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:22:18,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [247237368] [2021-12-07 01:22:18,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:22:18,369 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:22:18,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:22:18,371 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:22:18,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-07 01:22:18,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:22:18,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-07 01:22:18,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:22:18,643 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 [2021-12-07 01:22:18,707 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-07 01:22:18,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:22:18,708 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:22:18,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [247237368] [2021-12-07 01:22:18,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [247237368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:22:18,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:22:18,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:22:18,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488982253] [2021-12-07 01:22:18,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:22:18,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:22:18,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:22:18,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:22:18,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:22:18,709 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-07 01:22:19,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:22:19,166 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2021-12-07 01:22:19,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:22:19,167 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2021-12-07 01:22:19,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:22:19,168 INFO L225 Difference]: With dead ends: 112 [2021-12-07 01:22:19,168 INFO L226 Difference]: Without dead ends: 112 [2021-12-07 01:22:19,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:22:19,168 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 73 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:22:19,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 246 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 01:22:19,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-07 01:22:19,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-12-07 01:22:19,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 78 states have (on average 1.4102564102564104) internal successors, (110), 105 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:22:19,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2021-12-07 01:22:19,171 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 46 [2021-12-07 01:22:19,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:22:19,171 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2021-12-07 01:22:19,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-07 01:22:19,171 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2021-12-07 01:22:19,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-07 01:22:19,172 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:22:19,172 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:22:19,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-12-07 01:22:19,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:22:19,373 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:22:19,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:22:19,374 INFO L85 PathProgramCache]: Analyzing trace with hash 226118937, now seen corresponding path program 1 times [2021-12-07 01:22:19,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:22:19,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [646406615] [2021-12-07 01:22:19,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:22:19,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:22:19,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:22:19,378 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:22:19,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-07 01:22:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:22:19,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-07 01:22:19,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:22:19,824 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 [2021-12-07 01:22:20,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-12-07 01:22:20,394 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-07 01:22:20,394 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 31 treesize of output 42 [2021-12-07 01:22:20,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:22:20,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-12-07 01:22:20,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-12-07 01:22:20,622 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:22:20,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:22:20,766 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:22:20,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [646406615] [2021-12-07 01:22:20,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [646406615] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:22:20,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1182664554] [2021-12-07 01:22:20,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:22:20,767 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:22:20,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:22:20,768 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:22:20,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-12-07 01:22:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:22:21,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-07 01:22:21,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:22:21,235 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 [2021-12-07 01:22:21,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-12-07 01:22:21,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:22:21,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 27 [2021-12-07 01:22:21,942 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-07 01:22:21,943 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 30 treesize of output 41 [2021-12-07 01:22:22,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-12-07 01:22:22,179 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:22:22,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:22:22,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1182664554] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:22:22,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:22:22,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-12-07 01:22:22,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733688415] [2021-12-07 01:22:22,295 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:22:22,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-07 01:22:22,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:22:22,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-07 01:22:22,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=860, Unknown=3, NotChecked=0, Total=992 [2021-12-07 01:22:22,296 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand has 30 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:22:23,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:22:23,495 INFO L93 Difference]: Finished difference Result 127 states and 131 transitions. [2021-12-07 01:22:23,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-07 01:22:23,495 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2021-12-07 01:22:23,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:22:23,496 INFO L225 Difference]: With dead ends: 127 [2021-12-07 01:22:23,496 INFO L226 Difference]: Without dead ends: 127 [2021-12-07 01:22:23,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 68 SyntacticMatches, 8 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=240, Invalid=1474, Unknown=8, NotChecked=0, Total=1722 [2021-12-07 01:22:23,497 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 62 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:22:23,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 707 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 386 Invalid, 0 Unknown, 167 Unchecked, 0.7s Time] [2021-12-07 01:22:23,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-07 01:22:23,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 111. [2021-12-07 01:22:23,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 78 states have (on average 1.3974358974358974) internal successors, (109), 104 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:22:23,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2021-12-07 01:22:23,500 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 46 [2021-12-07 01:22:23,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:22:23,500 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2021-12-07 01:22:23,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:22:23,500 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2021-12-07 01:22:23,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-07 01:22:23,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:22:23,501 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:22:23,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2021-12-07 01:22:23,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-12-07 01:22:23,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:22:23,902 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:22:23,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:22:23,903 INFO L85 PathProgramCache]: Analyzing trace with hash 226118938, now seen corresponding path program 1 times [2021-12-07 01:22:23,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:22:23,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705042867] [2021-12-07 01:22:23,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:22:23,905 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:22:23,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:22:23,907 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:22:23,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-07 01:22:24,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:22:24,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-07 01:22:24,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:22:24,328 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 [2021-12-07 01:22:24,335 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 [2021-12-07 01:22:24,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-12-07 01:22:24,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-07 01:22:25,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:22:25,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 36 [2021-12-07 01:22:25,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:22:25,234 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 16 treesize of output 18 [2021-12-07 01:22:25,250 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-07 01:22:25,250 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 27 treesize of output 27 [2021-12-07 01:22:25,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:22:25,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-07 01:22:25,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-07 01:22:25,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 01:22:25,519 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:22:25,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:22:27,971 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:22:27,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705042867] [2021-12-07 01:22:27,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [705042867] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:22:27,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1019606683] [2021-12-07 01:22:27,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:22:27,972 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:22:27,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:22:27,972 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:22:27,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-12-07 01:22:28,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:22:28,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-07 01:22:28,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:22:28,496 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 [2021-12-07 01:22:28,502 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 [2021-12-07 01:22:29,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-12-07 01:22:29,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-07 01:22:29,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:22:29,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-07 01:22:29,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:22:29,578 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 16 treesize of output 18 [2021-12-07 01:22:29,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:22:29,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 36 [2021-12-07 01:22:29,603 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-07 01:22:29,603 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 [2021-12-07 01:22:29,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-07 01:22:29,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 01:22:29,842 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:22:29,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:22:30,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1019606683] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:22:30,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:22:30,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 31 [2021-12-07 01:22:30,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064602891] [2021-12-07 01:22:30,399 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:22:30,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-07 01:22:30,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:22:30,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-07 01:22:30,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1102, Unknown=8, NotChecked=0, Total=1260 [2021-12-07 01:22:30,400 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 32 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 26 states have internal predecessors, (73), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:22:32,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:22:32,530 INFO L93 Difference]: Finished difference Result 126 states and 130 transitions. [2021-12-07 01:22:32,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-07 01:22:32,530 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 26 states have internal predecessors, (73), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2021-12-07 01:22:32,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:22:32,531 INFO L225 Difference]: With dead ends: 126 [2021-12-07 01:22:32,531 INFO L226 Difference]: Without dead ends: 126 [2021-12-07 01:22:32,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=275, Invalid=1873, Unknown=14, NotChecked=0, Total=2162 [2021-12-07 01:22:32,532 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 53 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:22:32,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 776 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 661 Invalid, 0 Unknown, 127 Unchecked, 1.2s Time] [2021-12-07 01:22:32,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-07 01:22:32,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 110. [2021-12-07 01:22:32,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 78 states have (on average 1.3846153846153846) internal successors, (108), 103 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:22:32,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2021-12-07 01:22:32,536 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 46 [2021-12-07 01:22:32,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:22:32,536 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2021-12-07 01:22:32,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 26 states have internal predecessors, (73), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:22:32,536 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2021-12-07 01:22:32,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-07 01:22:32,536 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:22:32,536 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:22:32,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-12-07 01:22:32,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-12-07 01:22:32,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:22:32,938 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:22:32,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:22:32,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1475150796, now seen corresponding path program 1 times [2021-12-07 01:22:32,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:22:32,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1126871296] [2021-12-07 01:22:32,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:22:32,941 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:22:32,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:22:32,943 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:22:32,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-07 01:22:33,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:22:33,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:22:33,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:22:33,306 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-07 01:22:33,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:22:33,306 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:22:33,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1126871296] [2021-12-07 01:22:33,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1126871296] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:22:33,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:22:33,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:22:33,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903897486] [2021-12-07 01:22:33,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:22:33,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:22:33,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:22:33,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:22:33,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:22:33,307 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:22:33,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:22:33,499 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2021-12-07 01:22:33,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:22:33,499 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2021-12-07 01:22:33,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:22:33,500 INFO L225 Difference]: With dead ends: 125 [2021-12-07 01:22:33,500 INFO L226 Difference]: Without dead ends: 125 [2021-12-07 01:22:33,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:22:33,501 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 142 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:22:33,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 114 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:22:33,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-12-07 01:22:33,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 107. [2021-12-07 01:22:33,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 78 states have (on average 1.3461538461538463) internal successors, (105), 100 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:22:33,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2021-12-07 01:22:33,503 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 49 [2021-12-07 01:22:33,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:22:33,504 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2021-12-07 01:22:33,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:22:33,504 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2021-12-07 01:22:33,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-07 01:22:33,504 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:22:33,504 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:22:33,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-12-07 01:22:33,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:22:33,705 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:22:33,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:22:33,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1475150797, now seen corresponding path program 1 times [2021-12-07 01:22:33,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:22:33,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1053511257] [2021-12-07 01:22:33,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:22:33,705 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:22:33,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:22:33,706 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:22:33,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-07 01:22:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:22:33,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:22:33,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:22:33,984 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-07 01:22:33,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:22:33,984 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:22:33,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1053511257] [2021-12-07 01:22:33,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1053511257] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:22:33,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:22:33,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:22:33,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083580922] [2021-12-07 01:22:33,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:22:33,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:22:33,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:22:33,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:22:33,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:22:33,985 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:22:34,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:22:34,170 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2021-12-07 01:22:34,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:22:34,171 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2021-12-07 01:22:34,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:22:34,171 INFO L225 Difference]: With dead ends: 104 [2021-12-07 01:22:34,171 INFO L226 Difference]: Without dead ends: 104 [2021-12-07 01:22:34,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:22:34,172 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 124 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:22:34,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 116 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:22:34,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-07 01:22:34,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-12-07 01:22:34,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 78 states have (on average 1.3076923076923077) internal successors, (102), 97 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:22:34,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2021-12-07 01:22:34,175 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 49 [2021-12-07 01:22:34,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:22:34,175 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2021-12-07 01:22:34,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:22:34,175 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2021-12-07 01:22:34,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-07 01:22:34,175 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:22:34,175 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:22:34,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-12-07 01:22:34,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:22:34,376 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:22:34,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:22:34,377 INFO L85 PathProgramCache]: Analyzing trace with hash 280709232, now seen corresponding path program 1 times [2021-12-07 01:22:34,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:22:34,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [656154434] [2021-12-07 01:22:34,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:22:34,379 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:22:34,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:22:34,381 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:22:34,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-07 01:22:34,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:22:34,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-07 01:22:34,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:22:34,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-12-07 01:22:35,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:22:35,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-12-07 01:22:35,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-07 01:22:35,306 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:22:35,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:22:35,406 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:22:35,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [656154434] [2021-12-07 01:22:35,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [656154434] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:22:35,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [682351689] [2021-12-07 01:22:35,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:22:35,406 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:22:35,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:22:35,407 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:22:35,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-12-07 01:22:35,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:22:35,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 01:22:35,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:22:36,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-12-07 01:22:36,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:22:36,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-12-07 01:22:36,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-07 01:22:36,471 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:22:36,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:22:36,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [682351689] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:22:36,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:22:36,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-12-07 01:22:36,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656984778] [2021-12-07 01:22:36,549 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:22:36,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-07 01:22:36,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:22:36,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-07 01:22:36,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=788, Unknown=14, NotChecked=0, Total=930 [2021-12-07 01:22:36,550 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand has 29 states, 27 states have (on average 2.814814814814815) internal successors, (76), 25 states have internal predecessors, (76), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:22:37,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:22:37,390 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2021-12-07 01:22:37,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-07 01:22:37,390 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.814814814814815) internal successors, (76), 25 states have internal predecessors, (76), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 51 [2021-12-07 01:22:37,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:22:37,391 INFO L225 Difference]: With dead ends: 117 [2021-12-07 01:22:37,391 INFO L226 Difference]: Without dead ends: 117 [2021-12-07 01:22:37,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 91 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=243, Invalid=1373, Unknown=24, NotChecked=0, Total=1640 [2021-12-07 01:22:37,392 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 64 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:22:37,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 548 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 251 Invalid, 0 Unknown, 76 Unchecked, 0.4s Time] [2021-12-07 01:22:37,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-07 01:22:37,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 101. [2021-12-07 01:22:37,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.3066666666666666) internal successors, (98), 94 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:22:37,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2021-12-07 01:22:37,394 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 51 [2021-12-07 01:22:37,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:22:37,394 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2021-12-07 01:22:37,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.814814814814815) internal successors, (76), 25 states have internal predecessors, (76), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:22:37,395 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2021-12-07 01:22:37,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-07 01:22:37,395 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:22:37,395 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:22:37,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2021-12-07 01:22:37,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-12-07 01:22:37,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:22:37,796 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:22:37,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:22:37,797 INFO L85 PathProgramCache]: Analyzing trace with hash 869466270, now seen corresponding path program 1 times [2021-12-07 01:22:37,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:22:37,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [213751626] [2021-12-07 01:22:37,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:22:37,800 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:22:37,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:22:37,802 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:22:37,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-12-07 01:22:37,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:22:38,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 01:22:38,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:22:38,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-12-07 01:22:38,064 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-07 01:22:38,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:22:38,064 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:22:38,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [213751626] [2021-12-07 01:22:38,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [213751626] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:22:38,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:22:38,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:22:38,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852329644] [2021-12-07 01:22:38,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:22:38,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:22:38,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:22:38,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:22:38,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:22:38,065 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-07 01:22:38,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:22:38,428 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2021-12-07 01:22:38,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:22:38,428 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2021-12-07 01:22:38,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:22:38,429 INFO L225 Difference]: With dead ends: 118 [2021-12-07 01:22:38,429 INFO L226 Difference]: Without dead ends: 118 [2021-12-07 01:22:38,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:22:38,429 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 50 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:22:38,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 243 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:22:38,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-07 01:22:38,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 100. [2021-12-07 01:22:38,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 75 states have (on average 1.2933333333333332) internal successors, (97), 93 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:22:38,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2021-12-07 01:22:38,432 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 52 [2021-12-07 01:22:38,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:22:38,432 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2021-12-07 01:22:38,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-07 01:22:38,432 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2021-12-07 01:22:38,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-07 01:22:38,432 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:22:38,433 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:22:38,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-12-07 01:22:38,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:22:38,634 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:22:38,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:22:38,635 INFO L85 PathProgramCache]: Analyzing trace with hash 869466271, now seen corresponding path program 1 times [2021-12-07 01:22:38,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:22:38,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1206303027] [2021-12-07 01:22:38,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:22:38,636 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:22:38,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:22:38,639 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:22:38,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-12-07 01:22:38,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:22:38,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-07 01:22:38,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:22:38,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-12-07 01:22:38,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-12-07 01:22:39,053 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-07 01:22:39,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:22:39,053 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:22:39,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1206303027] [2021-12-07 01:22:39,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1206303027] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:22:39,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:22:39,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:22:39,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53054213] [2021-12-07 01:22:39,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:22:39,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:22:39,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:22:39,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:22:39,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:22:39,055 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-07 01:22:39,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:22:39,777 INFO L93 Difference]: Finished difference Result 99 states and 102 transitions. [2021-12-07 01:22:39,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:22:39,778 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2021-12-07 01:22:39,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:22:39,779 INFO L225 Difference]: With dead ends: 99 [2021-12-07 01:22:39,779 INFO L226 Difference]: Without dead ends: 99 [2021-12-07 01:22:39,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:22:39,780 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 53 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:22:39,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 253 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-07 01:22:39,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-07 01:22:39,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-12-07 01:22:39,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 75 states have (on average 1.28) internal successors, (96), 92 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:22:39,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2021-12-07 01:22:39,782 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 52 [2021-12-07 01:22:39,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:22:39,782 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2021-12-07 01:22:39,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-07 01:22:39,782 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2021-12-07 01:22:39,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-07 01:22:39,782 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:22:39,783 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:22:39,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-12-07 01:22:39,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:22:39,983 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:22:39,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:22:39,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1183650644, now seen corresponding path program 1 times [2021-12-07 01:22:39,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:22:39,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1522871335] [2021-12-07 01:22:39,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:22:39,984 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:22:39,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:22:39,985 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:22:39,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-12-07 01:22:40,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:22:40,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-07 01:22:40,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:22:40,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:22:40,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:22:40,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 24 [2021-12-07 01:22:40,692 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:22:40,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 34 [2021-12-07 01:22:40,838 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:22:40,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 21 [2021-12-07 01:22:41,233 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-12-07 01:22:41,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-12-07 01:22:42,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:22:42,738 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-07 01:22:42,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 40 [2021-12-07 01:22:42,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-07 01:22:42,783 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-12-07 01:22:42,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 56 [2021-12-07 01:22:43,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:22:43,948 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-07 01:22:43,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 68 [2021-12-07 01:22:44,101 INFO L354 Elim1Store]: treesize reduction 184, result has 28.4 percent of original size [2021-12-07 01:22:44,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 78 treesize of output 130 [2021-12-07 01:22:44,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:22:44,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-07 01:22:46,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 01:22:47,187 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-07 01:22:47,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 52 [2021-12-07 01:22:51,070 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:22:51,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:22:51,661 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:22:51,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1522871335] [2021-12-07 01:22:51,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1522871335] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:22:51,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1495557571] [2021-12-07 01:22:51,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:22:51,662 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:22:51,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:22:51,662 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:22:51,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-12-07 01:22:52,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:22:52,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-07 01:22:52,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:22:52,487 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 [2021-12-07 01:22:53,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:22:53,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:22:53,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 35 [2021-12-07 01:22:53,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-07 01:22:54,703 INFO L354 Elim1Store]: treesize reduction 86, result has 36.3 percent of original size [2021-12-07 01:22:54,703 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 53 treesize of output 82 [2021-12-07 01:22:54,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:22:54,737 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-07 01:22:54,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 53 [2021-12-07 01:22:54,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:22:54,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-07 01:22:55,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:22:55,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:22:55,403 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-07 01:22:55,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 70 treesize of output 41 [2021-12-07 01:22:55,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 01:22:56,378 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:22:56,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:22:56,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1495557571] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:22:56,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:22:56,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 49 [2021-12-07 01:22:56,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639499848] [2021-12-07 01:22:56,700 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:22:56,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-07 01:22:56,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:22:56,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-07 01:22:56,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2735, Unknown=31, NotChecked=0, Total=2970 [2021-12-07 01:22:56,701 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand has 50 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 43 states have internal predecessors, (94), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 01:23:00,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:00,607 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2021-12-07 01:23:00,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-07 01:23:00,608 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 43 states have internal predecessors, (94), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 53 [2021-12-07 01:23:00,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:00,608 INFO L225 Difference]: With dead ends: 98 [2021-12-07 01:23:00,608 INFO L226 Difference]: Without dead ends: 98 [2021-12-07 01:23:00,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 73 SyntacticMatches, 7 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1915 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=382, Invalid=5574, Unknown=50, NotChecked=0, Total=6006 [2021-12-07 01:23:00,610 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 4 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 492 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:00,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 956 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 492 Unchecked, 0.1s Time] [2021-12-07 01:23:00,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-07 01:23:00,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-12-07 01:23:00,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 91 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:23:00,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2021-12-07 01:23:00,613 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 53 [2021-12-07 01:23:00,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:00,613 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2021-12-07 01:23:00,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 43 states have internal predecessors, (94), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 01:23:00,613 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2021-12-07 01:23:00,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-07 01:23:00,613 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:00,614 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:00,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-12-07 01:23:00,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-12-07 01:23:01,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 01:23:01,014 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:23:01,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:01,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1183650645, now seen corresponding path program 1 times [2021-12-07 01:23:01,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:23:01,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1240009554] [2021-12-07 01:23:01,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:01,015 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:23:01,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:23:01,016 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:23:01,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-12-07 01:23:01,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:01,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-07 01:23:01,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:01,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:23:01,397 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 15 treesize of output 17 [2021-12-07 01:23:01,438 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 [2021-12-07 01:23:01,631 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:23:01,631 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 25 treesize of output 32 [2021-12-07 01:23:02,016 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:23:02,016 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 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-07 01:23:02,058 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-07 01:23:02,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 51 [2021-12-07 01:23:02,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:23:02,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:23:03,129 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-07 01:23:03,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 63 [2021-12-07 01:23:03,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2021-12-07 01:23:03,152 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-07 01:23:03,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 01:23:03,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:23:03,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:23:03,688 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-07 01:23:03,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 105 treesize of output 87 [2021-12-07 01:23:03,746 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-12-07 01:23:03,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 68 [2021-12-07 01:23:03,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:23:03,771 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-07 01:23:03,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2021-12-07 01:23:03,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-07 01:23:04,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:23:04,582 INFO L354 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2021-12-07 01:23:04,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 64 [2021-12-07 01:23:04,610 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-12-07 01:23:04,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2021-12-07 01:23:05,039 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:23:05,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:23:08,377 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:23:08,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1240009554] [2021-12-07 01:23:08,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1240009554] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:08,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1512864307] [2021-12-07 01:23:08,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:08,377 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:23:08,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:23:08,378 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:23:08,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-12-07 01:23:09,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:09,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-07 01:23:09,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:09,258 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 [2021-12-07 01:23:09,264 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 [2021-12-07 01:23:10,248 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:23:10,248 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 24 treesize of output 31 [2021-12-07 01:23:10,263 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 12 treesize of output 14 [2021-12-07 01:23:11,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:23:11,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:23:11,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:23:11,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 47 [2021-12-07 01:23:11,795 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:23:11,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 01:23:12,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:23:12,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-07 01:23:12,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:23:12,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:23:12,839 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-07 01:23:12,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2021-12-07 01:23:12,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:23:12,863 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-07 01:23:12,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 78 [2021-12-07 01:23:12,890 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-07 01:23:12,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 49 [2021-12-07 01:23:14,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:23:14,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:23:14,168 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:23:14,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 50 [2021-12-07 01:23:14,191 INFO L354 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2021-12-07 01:23:14,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 21 [2021-12-07 01:23:14,618 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:23:14,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:23:16,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1512864307] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:16,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:23:16,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 28] total 52 [2021-12-07 01:23:16,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145105585] [2021-12-07 01:23:16,656 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:23:16,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-07 01:23:16,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:23:16,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-07 01:23:16,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=3174, Unknown=20, NotChecked=0, Total=3422 [2021-12-07 01:23:16,658 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand has 53 states, 48 states have (on average 1.9583333333333333) internal successors, (94), 43 states have internal predecessors, (94), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 01:23:20,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:20,780 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2021-12-07 01:23:20,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-07 01:23:20,781 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 48 states have (on average 1.9583333333333333) internal successors, (94), 43 states have internal predecessors, (94), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 53 [2021-12-07 01:23:20,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:20,781 INFO L225 Difference]: With dead ends: 97 [2021-12-07 01:23:20,781 INFO L226 Difference]: Without dead ends: 97 [2021-12-07 01:23:20,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1976 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=442, Invalid=6326, Unknown=38, NotChecked=0, Total=6806 [2021-12-07 01:23:20,784 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 7 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 395 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:20,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 853 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 225 Invalid, 0 Unknown, 395 Unchecked, 0.3s Time] [2021-12-07 01:23:20,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-07 01:23:20,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-12-07 01:23:20,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 90 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:23:20,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2021-12-07 01:23:20,786 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 53 [2021-12-07 01:23:20,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:20,786 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2021-12-07 01:23:20,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 48 states have (on average 1.9583333333333333) internal successors, (94), 43 states have internal predecessors, (94), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 01:23:20,787 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2021-12-07 01:23:20,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-07 01:23:20,787 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:20,787 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:20,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2021-12-07 01:23:20,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2021-12-07 01:23:21,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:23:21,188 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:23:21,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:21,188 INFO L85 PathProgramCache]: Analyzing trace with hash -939292314, now seen corresponding path program 1 times [2021-12-07 01:23:21,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:23:21,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [133594646] [2021-12-07 01:23:21,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:21,189 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:23:21,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:23:21,189 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:23:21,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-12-07 01:23:21,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:21,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-07 01:23:21,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:21,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:23:21,626 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 12 treesize of output 14 [2021-12-07 01:23:21,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:23:21,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-07 01:23:21,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:23:21,718 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-12-07 01:23:21,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 21 [2021-12-07 01:23:21,783 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 [2021-12-07 01:23:22,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:23:22,373 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-07 01:23:22,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 28 [2021-12-07 01:23:22,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-07 01:23:22,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-07 01:23:22,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:23:22,944 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-07 01:23:22,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 51 [2021-12-07 01:23:22,977 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-07 01:23:22,977 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 34 treesize of output 45 [2021-12-07 01:23:23,026 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:23:23,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-07 01:23:23,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:23:23,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 01:23:24,299 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-12-07 01:23:24,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 54 [2021-12-07 01:23:24,511 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-07 01:23:24,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 30 [2021-12-07 01:23:24,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:23:24,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:23:24,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-07 01:23:24,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:23:24,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-07 01:23:25,152 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:23:25,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2021-12-07 01:23:25,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-12-07 01:23:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:23:26,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:23:26,279 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3064 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3064) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))))) is different from false [2021-12-07 01:23:27,240 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3062 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3061 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3064 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3063 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store (store (store (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|)) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3061) |c_ULTIMATE.start_dll_circular_prepend_#t~mem13#1.base| v_ArrVal_3062) |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_3063) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3064) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))))))))))) (_ bv1 1)))) is different from false [2021-12-07 01:23:28,384 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3062 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3061 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3064 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3063 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store (let ((.cse0 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|))) (store (store (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store .cse0 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|)) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3061) .cse1 v_ArrVal_3062) (select (select |c_#memory_$Pointer$.base| .cse1) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|))) v_ArrVal_3063))) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3064) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))))))))))))) (_ bv1 1)))) is different from false [2021-12-07 01:23:29,312 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:23:29,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [133594646] [2021-12-07 01:23:29,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [133594646] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:29,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [142716609] [2021-12-07 01:23:29,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:29,312 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:23:29,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:23:29,313 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:23:29,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-12-07 01:23:30,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:30,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-07 01:23:30,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:31,023 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 [2021-12-07 01:23:31,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:23:32,670 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:23:32,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2021-12-07 01:23:32,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-07 01:23:32,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-07 01:23:33,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:23:33,096 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-07 01:23:33,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 49 [2021-12-07 01:23:33,128 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-07 01:23:33,128 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 36 treesize of output 47 [2021-12-07 01:23:33,177 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:23:33,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-07 01:23:33,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:23:36,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-12-07 01:23:38,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:23:38,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 54 [2021-12-07 01:23:38,767 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-07 01:23:38,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 30 [2021-12-07 01:23:38,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:23:39,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:23:39,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-07 01:23:39,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:23:40,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:23:40,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-07 01:23:40,494 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:23:40,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2021-12-07 01:23:40,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-12-07 01:23:41,164 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:23:41,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:23:43,837 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3062 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3061 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3064 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3063 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store (let ((.cse0 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|))) (store (store (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store .cse0 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base|)) |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base| v_ArrVal_3061) .cse1 v_ArrVal_3062) (select (select |c_#memory_$Pointer$.base| .cse1) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|))) v_ArrVal_3063))) |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base| v_ArrVal_3064) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))))))))))))) (_ bv1 1)))) is different from false [2021-12-07 01:23:46,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [142716609] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:46,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:23:46,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34] total 58 [2021-12-07 01:23:46,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459449790] [2021-12-07 01:23:46,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:23:46,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-07 01:23:46,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:23:46,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-07 01:23:46,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=5327, Unknown=112, NotChecked=612, Total=6480 [2021-12-07 01:23:46,648 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand has 59 states, 54 states have (on average 1.6481481481481481) internal successors, (89), 49 states have internal predecessors, (89), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 01:23:50,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:50,977 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2021-12-07 01:23:50,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-07 01:23:50,978 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 54 states have (on average 1.6481481481481481) internal successors, (89), 49 states have internal predecessors, (89), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 58 [2021-12-07 01:23:50,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:50,978 INFO L225 Difference]: With dead ends: 98 [2021-12-07 01:23:50,978 INFO L226 Difference]: Without dead ends: 98 [2021-12-07 01:23:50,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 62 SyntacticMatches, 12 SemanticMatches, 96 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 2896 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=613, Invalid=8021, Unknown=124, NotChecked=748, Total=9506 [2021-12-07 01:23:50,981 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 62 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 376 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:50,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 695 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 467 Invalid, 0 Unknown, 376 Unchecked, 1.3s Time] [2021-12-07 01:23:50,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-07 01:23:50,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-12-07 01:23:50,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 76 states have (on average 1.263157894736842) internal successors, (96), 91 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:23:50,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2021-12-07 01:23:50,983 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 58 [2021-12-07 01:23:50,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:50,984 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2021-12-07 01:23:50,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 54 states have (on average 1.6481481481481481) internal successors, (89), 49 states have internal predecessors, (89), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 01:23:50,984 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2021-12-07 01:23:50,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-07 01:23:50,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:50,984 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:50,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-12-07 01:23:51,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-12-07 01:23:51,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 01:23:51,386 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 56 more)] === [2021-12-07 01:23:51,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:51,387 INFO L85 PathProgramCache]: Analyzing trace with hash -939292313, now seen corresponding path program 1 times [2021-12-07 01:23:51,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:23:51,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [560745187] [2021-12-07 01:23:51,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:51,389 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:23:51,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:23:51,391 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:23:51,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-12-07 01:23:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:51,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-07 01:23:51,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:51,893 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 [2021-12-07 01:23:51,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-12-07 01:23:51,997 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:23:51,997 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 18 treesize of output 18 [2021-12-07 01:23:52,065 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 [2021-12-07 01:23:52,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:23:52,786 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-07 01:23:52,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 27 [2021-12-07 01:23:52,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-07 01:23:52,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-07 01:23:52,868 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 [2021-12-07 01:23:53,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:23:53,460 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-07 01:23:53,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 51 [2021-12-07 01:23:53,483 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-07 01:23:53,484 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 29 treesize of output 29 [2021-12-07 01:23:53,547 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:23:53,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-07 01:23:53,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:23:54,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:23:54,995 INFO L354 Elim1Store]: treesize reduction 99, result has 17.5 percent of original size [2021-12-07 01:23:54,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 63 treesize of output 48 [2021-12-07 01:23:55,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-12-07 01:23:55,214 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:23:55,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-07 01:23:55,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:23:55,255 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-07 01:23:55,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 36 [2021-12-07 01:23:55,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:23:55,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:23:55,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-12-07 01:23:55,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-12-07 01:23:55,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:23:55,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-07 01:23:55,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-07 01:23:55,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-07 01:23:56,000 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:23:56,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 42 [2021-12-07 01:23:56,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:23:56,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-07 01:23:56,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-12-07 01:23:56,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 01:23:56,646 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:23:56,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:23:57,220 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3358 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3357 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3358) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv12 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3357) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_ArrVal_3358 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3358) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd .cse0 (_ bv8 32)) (bvadd .cse0 (_ bv12 32)))))) is different from false [2021-12-07 01:23:57,255 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3358 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3355 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_3355) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3358) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd .cse0 (_ bv8 32)) (bvadd .cse0 (_ bv12 32))))) (forall ((v_ArrVal_3358 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3357 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3356 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3355 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_3355) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3358) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv12 32)) (select |c_#length| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_3356) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3357) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2021-12-07 01:23:57,293 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3358 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3357 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3354 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3353 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3356 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3355 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~old_head~0#1.base| v_ArrVal_3354) |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_3355) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3358) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv12 32)) (select |c_#length| (select (select (store (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~old_head~0#1.base| v_ArrVal_3353) |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_3356) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3357) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_ArrVal_3358 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3354 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3355 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~old_head~0#1.base| v_ArrVal_3354) |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_3355) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3358) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd (_ bv8 32) .cse0) (bvadd .cse0 (_ bv12 32)))))) is different from false [2021-12-07 01:23:58,846 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3358 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3357 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3354 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3353 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3356 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3355 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3352 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3351 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3352) |c_ULTIMATE.start_dll_circular_prepend_~old_head~0#1.base| v_ArrVal_3354) |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_3355) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3358) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv12 32)) (select |c_#length| (select (select (store (store (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3351) |c_ULTIMATE.start_dll_circular_prepend_~old_head~0#1.base| v_ArrVal_3353) |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_3356) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3357) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_ArrVal_3358 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3354 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3355 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3352 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3352) |c_ULTIMATE.start_dll_circular_prepend_~old_head~0#1.base| v_ArrVal_3354) |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_3355) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3358) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd (_ bv8 32) .cse0) (bvadd .cse0 (_ bv12 32)))))) is different from false [2021-12-07 01:24:01,155 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3358 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3357 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3354 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3353 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3356 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3355 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3352 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3351 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store (store (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|)) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3352) |c_ULTIMATE.start_dll_circular_prepend_~old_head~0#1.base| v_ArrVal_3354) |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_3355) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3358) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv12 32)) (select |c_#length| (select (select (store (store (store (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|)) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3351) |c_ULTIMATE.start_dll_circular_prepend_~old_head~0#1.base| v_ArrVal_3353) |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_3356) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3357) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_ArrVal_3358 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3354 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3355 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3352 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (store (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|)) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3352) |c_ULTIMATE.start_dll_circular_prepend_~old_head~0#1.base| v_ArrVal_3354) |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_3355) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3358) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd (_ bv8 32) .cse0) (bvadd .cse0 (_ bv12 32)))))) is different from false [2021-12-07 01:24:01,306 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3358 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3357 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3354 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3353 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3356 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3355 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3352 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3351 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store (store (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|)) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3352) |c_ULTIMATE.start_dll_circular_prepend_#t~mem13#1.base| v_ArrVal_3354) |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_3355) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3358) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv12 32)) (select |c_#length| (select (select (store (store (store (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|)) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3351) |c_ULTIMATE.start_dll_circular_prepend_#t~mem13#1.base| v_ArrVal_3353) |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_3356) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3357) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_ArrVal_3358 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3354 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3355 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3352 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (store (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|)) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3352) |c_ULTIMATE.start_dll_circular_prepend_#t~mem13#1.base| v_ArrVal_3354) |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_3355) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3358) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd (_ bv8 32) .cse0) (bvadd .cse0 (_ bv12 32)))))) is different from false [2021-12-07 01:24:02,165 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3358 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3357 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3354 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3353 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3356 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3355 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3352 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3351 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|))) (let ((.cse0 (select .cse1 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|))) (bvule (bvadd (select (select (store (store (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|)) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3352) .cse0 v_ArrVal_3354) |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_3355) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3358) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv12 32)) (select |c_#length| (select (select (store (store (store (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store .cse1 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|)) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3351) .cse0 v_ArrVal_3353) |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_3356) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3357) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))) (forall ((v_ArrVal_3358 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3354 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3355 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3352 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (select (select (store (store (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|)) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3352) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|) v_ArrVal_3354) |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_3355) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3358) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd (_ bv8 32) .cse2) (bvadd .cse2 (_ bv12 32)))))) is different from false [2021-12-07 01:24:02,578 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3358 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3357 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3354 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3353 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3356 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3355 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3352 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3351 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|))) (let ((.cse0 (select .cse1 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|))) (bvule (bvadd (select (select (store (store (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|)) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3352) .cse0 v_ArrVal_3354) |c_ULTIMATE.start_dll_circular_prepend_#t~mem12#1.base| v_ArrVal_3355) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3358) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv12 32)) (select |c_#length| (select (select (store (store (store (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store .cse1 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|)) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3351) .cse0 v_ArrVal_3353) |c_ULTIMATE.start_dll_circular_prepend_#t~mem12#1.base| v_ArrVal_3356) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3357) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))) (forall ((v_ArrVal_3358 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3354 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3355 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3352 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (select (select (store (store (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|)) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3352) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|) v_ArrVal_3354) |c_ULTIMATE.start_dll_circular_prepend_#t~mem12#1.base| v_ArrVal_3355) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3358) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd (_ bv8 32) .cse2) (bvadd .cse2 (_ bv12 32)))))) is different from false [2021-12-07 01:24:41,000 WARN L227 SmtUtils]: Spent 8.55s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 01:24:44,218 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3358 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3357 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3354 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3353 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3356 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3355 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3352 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3351 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|))) (let ((.cse1 (select .cse3 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|)) (.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|))) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| .cse1) (bvadd (_ bv4 32) (select .cse0 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|))))) (bvule (bvadd (select (select (store (store (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store .cse0 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|)) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3352) .cse1 v_ArrVal_3354) .cse2 v_ArrVal_3355) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3358) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv12 32)) (select |c_#length| (select (select (store (store (store (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store .cse3 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|)) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3351) .cse1 v_ArrVal_3353) .cse2 v_ArrVal_3356) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3357) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))))) (forall ((v_ArrVal_3358 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3354 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3355 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3352 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (select (select (store (let ((.cse6 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|)) (.cse5 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|))) (store (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store .cse5 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|)) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3352) .cse6 v_ArrVal_3354) (select (select |c_#memory_$Pointer$.base| .cse6) (bvadd (_ bv4 32) (select .cse5 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|))) v_ArrVal_3355)) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3358) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd (_ bv8 32) .cse4) (bvadd .cse4 (_ bv12 32)))))) is different from false [2021-12-07 01:24:47,943 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3358 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3354 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3355 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3352 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|)) (.cse1 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|))) (store (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store .cse1 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.offset|)) |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base| v_ArrVal_3352) .cse2 v_ArrVal_3354) (select (select |c_#memory_$Pointer$.base| .cse2) (bvadd (_ bv4 32) (select .cse1 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|))) v_ArrVal_3355)) |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base| v_ArrVal_3358) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd .cse0 (_ bv8 32)) (bvadd .cse0 (_ bv12 32))))) (forall ((v_ArrVal_3358 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3357 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3354 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3353 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3356 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3355 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3352 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3351 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse6 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|))) (let ((.cse4 (select .cse6 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|)) (.cse3 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|))) (let ((.cse5 (select (select |c_#memory_$Pointer$.base| .cse4) (bvadd (_ bv4 32) (select .cse3 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|))))) (bvule (bvadd (select (select (store (store (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store .cse3 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.offset|)) |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base| v_ArrVal_3352) .cse4 v_ArrVal_3354) .cse5 v_ArrVal_3355) |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base| v_ArrVal_3358) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv12 32)) (select |c_#length| (select (select (store (store (store (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store .cse6 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base|)) |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base| v_ArrVal_3351) .cse4 v_ArrVal_3353) .cse5 v_ArrVal_3356) |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base| v_ArrVal_3357) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))))) is different from false [2021-12-07 01:24:52,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 450 treesize of output 388 [2021-12-07 01:25:04,314 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:25:04,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [560745187] [2021-12-07 01:25:04,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [560745187] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:25:04,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1143752090] [2021-12-07 01:25:04,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:25:04,315 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:25:04,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:25:04,317 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:25:04,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-12-07 01:25:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:05,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 94 conjunts are in the unsatisfiable core [2021-12-07 01:25:05,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:25:05,492 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 [2021-12-07 01:25:08,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:25:21,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:25:21,675 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 12 treesize of output 14 [2021-12-07 01:25:29,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:25:33,159 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 [2021-12-07 01:25:43,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:25:43,584 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 12 treesize of output 14 [2021-12-07 01:26:04,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:26:18,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:26:18,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 27 [2021-12-07 01:26:18,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-07 01:26:19,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:26:19,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-07 01:26:46,801 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:26:46,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-07 01:26:47,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:26:48,200 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:26:48,200 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 [2021-12-07 01:26:48,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:26:49,149 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-07 01:26:49,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 51 [2021-12-07 01:26:49,689 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-07 01:26:49,690 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 [2021-12-07 01:27:56,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:27:56,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:27:56,153 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-12-07 01:27:56,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 47 [2021-12-07 01:27:56,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-12-07 01:28:03,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:28:03,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-07 01:28:03,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:28:03,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:28:03,972 INFO L244 Elim1Store]: Index analysis took 134 ms [2021-12-07 01:28:03,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2021-12-07 01:28:04,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:28:04,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2021-12-07 01:28:05,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:28:05,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-07 01:28:05,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 01:28:12,107 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:28:12,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-07 01:28:12,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:28:14,831 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:28:14,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-07 01:28:14,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:28:20,197 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:28:20,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 42 [2021-12-07 01:28:20,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:28:20,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-07 01:28:28,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-12-07 01:28:28,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 01:28:39,301 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:28:39,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:28:40,268 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3513 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3513) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd (_ bv8 32) .cse0) (bvadd .cse0 (_ bv12 32))))) (forall ((v_ArrVal_3512 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3513 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3513) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv12 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3512) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2021-12-07 01:28:40,593 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3512 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3513 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3510 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3509 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_3509) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3513) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv12 32)) (select |c_#length| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_3510) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3512) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_ArrVal_3513 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3509 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_3509) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3513) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd (_ bv8 32) .cse0) (bvadd .cse0 (_ bv12 32)))))) is different from false [2021-12-07 01:29:14,067 WARN L227 SmtUtils]: Spent 6.19s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 01:29:27,214 WARN L227 SmtUtils]: Spent 6.88s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 01:29:43,509 WARN L227 SmtUtils]: Spent 10.48s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 01:30:00,231 WARN L227 SmtUtils]: Spent 8.29s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 01:30:18,510 WARN L227 SmtUtils]: Spent 5.06s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 01:30:48,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2021-12-07 01:30:48,181 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-12-07 01:30:48,182 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/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") [2021-12-07 01:30:48,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582638756] [2021-12-07 01:30:48,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:48,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:30:48,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:30:48,183 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:30:48,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-07 01:30:48,307 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@46f51bf8 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.variables.ProgramVarUtils.constructConstantForAuxVar(ProgramVarUtils.java:119) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.computeClosedFormula(UnmodifiableTransFormula.java:172) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.(UnmodifiableTransFormula.java:95) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.finishConstruction(TransFormulaBuilder.java:274) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.decoupleArrayValues(TransFormulaUtils.java:1226) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckUtils.decoupleArrayValues(TraceCheckUtils.java:388) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:132) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) 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) [2021-12-07 01:30:48,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:30:48,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-12-07 01:30:48,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646923455] [2021-12-07 01:30:48,309 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:30:48,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-07 01:30:48,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:30:48,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-07 01:30:48,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=5811, Unknown=44, NotChecked=1980, Total=8190 [2021-12-07 01:30:48,312 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 34 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 28 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:30:48,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 01:30:48,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 89 ConstructedPredicates, 12 IntricatePredicates, 0 DeprecatedPredicates, 2229 ImplicationChecksByTransitivity, 341.0s TimeCoverageRelationStatistics Valid=355, Invalid=5811, Unknown=44, NotChecked=1980, Total=8190 [2021-12-07 01:30:48,315 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:30:48,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 4 Unchecked, 0.0s Time] [2021-12-07 01:30:48,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2021-12-07 01:30:48,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-12-07 01:30:48,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-12-07 01:30:48,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42384152-f98b-4863-b584-acc97d58ae3b/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:30:48,917 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@46f51bf8 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) 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:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) 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) [2021-12-07 01:30:48,923 INFO L158 Benchmark]: Toolchain (without parser) took 554357.04ms. Allocated memory was 73.4MB in the beginning and 98.6MB in the end (delta: 25.2MB). Free memory was 56.2MB in the beginning and 43.8MB in the end (delta: 12.4MB). Peak memory consumption was 36.4MB. Max. memory is 16.1GB. [2021-12-07 01:30:48,923 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 73.4MB. Free memory is still 55.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 01:30:48,924 INFO L158 Benchmark]: CACSL2BoogieTranslator took 365.11ms. Allocated memory is still 73.4MB. Free memory was 56.0MB in the beginning and 47.7MB in the end (delta: 8.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-07 01:30:48,924 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.47ms. Allocated memory is still 73.4MB. Free memory was 47.7MB in the beginning and 45.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-07 01:30:48,925 INFO L158 Benchmark]: Boogie Preprocessor took 36.61ms. Allocated memory is still 73.4MB. Free memory was 45.3MB in the beginning and 43.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-07 01:30:48,925 INFO L158 Benchmark]: RCFGBuilder took 578.79ms. Allocated memory was 73.4MB in the beginning and 98.6MB in the end (delta: 25.2MB). Free memory was 43.2MB in the beginning and 64.6MB in the end (delta: -21.4MB). Peak memory consumption was 13.3MB. Max. memory is 16.1GB. [2021-12-07 01:30:48,926 INFO L158 Benchmark]: TraceAbstraction took 553319.45ms. Allocated memory is still 98.6MB. Free memory was 64.1MB in the beginning and 43.8MB in the end (delta: 20.3MB). Peak memory consumption was 20.2MB. Max. memory is 16.1GB. [2021-12-07 01:30:48,928 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 73.4MB. Free memory is still 55.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 365.11ms. Allocated memory is still 73.4MB. Free memory was 56.0MB in the beginning and 47.7MB in the end (delta: 8.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 51.47ms. Allocated memory is still 73.4MB. Free memory was 47.7MB in the beginning and 45.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.61ms. Allocated memory is still 73.4MB. Free memory was 45.3MB in the beginning and 43.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 578.79ms. Allocated memory was 73.4MB in the beginning and 98.6MB in the end (delta: 25.2MB). Free memory was 43.2MB in the beginning and 64.6MB in the end (delta: -21.4MB). Peak memory consumption was 13.3MB. Max. memory is 16.1GB. * TraceAbstraction took 553319.45ms. Allocated memory is still 98.6MB. Free memory was 64.1MB in the beginning and 43.8MB in the end (delta: 20.3MB). Peak memory consumption was 20.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@46f51bf8 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@46f51bf8: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@46f51bf8